{"id":10098,"date":"2023-03-04T18:57:30","date_gmt":"2023-03-04T15:27:30","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/the-dao-design-pattern-in-java-spring-boot-2l8o\/"},"modified":"2023-03-04T18:57:30","modified_gmt":"2023-03-04T15:27:30","slug":"the-dao-design-pattern-in-java-spring-boot-2l8o","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/the-dao-design-pattern-in-java-spring-boot-2l8o\/","title":{"rendered":"\u0627\u0644\u06af\u0648\u06cc \u0637\u0631\u0627\u062d\u06cc DAO \u062f\u0631 \u062c\u0627\u0648\u0627 \/ \u0628\u0648\u062a \u0628\u0647\u0627\u0631"},"content":{"rendered":"<div data-article-id=\"1387888\" id=\"article-body\">\n<p>\u0627\u0644\u06af\u0648\u06cc \u0637\u0631\u0627\u062d\u06cc DAO (Data Access Object) \u06cc\u06a9 \u0631\u0648\u0634 \u0645\u062d\u0628\u0648\u0628 \u0628\u0631\u0627\u06cc \u062c\u062f\u0627\u0633\u0627\u0632\u06cc \u0644\u0627\u06cc\u0647 \u067e\u0627\u06cc\u062f\u0627\u0631\u06cc \u0627\u0632 \u0628\u0642\u06cc\u0647 \u0628\u0631\u0646\u0627\u0645\u0647 \u0634\u0645\u0627 \u0627\u0633\u062a.  \u0627\u06cc\u0646 \u0631\u0648\u0634\u06cc \u0628\u0631\u0627\u06cc \u0627\u0646\u062a\u0632\u0627\u0639 \u06a9\u0631\u062f\u0646 \u062c\u0632\u0626\u06cc\u0627\u062a \u0639\u0645\u0644\u06cc\u0627\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc \u06a9\u0646\u062f \u0648 \u0628\u0647 \u0628\u0647\u0628\u0648\u062f \u0642\u0627\u0628\u0644\u06cc\u062a \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0648 \u0622\u0632\u0645\u0627\u06cc\u0634 \u067e\u0630\u06cc\u0631\u06cc \u06a9\u062f \u0634\u0645\u0627 \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u067e\u0633\u062a \u0648\u0628\u0644\u0627\u06af\u060c \u0627\u0644\u06af\u0648\u06cc DAO \u0631\u0627 \u062f\u0631 Java\/Spring Boot \u0628\u0631\u0631\u0633\u06cc \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645 \u0648 \u0646\u0645\u0648\u0646\u0647\u200c\u0647\u0627\u06cc\u06cc \u0627\u0632 \u06a9\u062f\u0647\u0627 \u0631\u0627 \u0628\u0631\u0627\u06cc \u062a\u0648\u0636\u06cc\u062d \u0646\u062d\u0648\u0647 \u0639\u0645\u0644\u06a9\u0631\u062f \u0622\u0646 \u0627\u0631\u0627\u0626\u0647 \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter-rtl ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nabfollower.com\/blog\/the-dao-design-pattern-in-java-spring-boot-2l8o\/#%D8%B1%D8%A7%D9%87_%D8%A7%D9%86%D8%AF%D8%A7%D8%B2%DB%8C_%D9%BE%D8%B1%D9%88%DA%98%D9%87\" >\u0631\u0627\u0647 \u0627\u0646\u062f\u0627\u0632\u06cc \u067e\u0631\u0648\u0698\u0647<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nabfollower.com\/blog\/the-dao-design-pattern-in-java-spring-boot-2l8o\/#%D8%AA%D8%B9%D8%B1%DB%8C%D9%81_%D9%85%D9%88%D8%AC%D9%88%D8%AF%DB%8C%D8%AA_%D9%87%D8%A7\" >\u062a\u0639\u0631\u06cc\u0641 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u0647\u0627<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nabfollower.com\/blog\/the-dao-design-pattern-in-java-spring-boot-2l8o\/#%D8%AA%D8%B9%D8%B1%DB%8C%D9%81_%D8%B1%D8%A7%D8%A8%D8%B7_%D9%87%D8%A7%DB%8C_DAO\" >\u062a\u0639\u0631\u06cc\u0641 \u0631\u0627\u0628\u0637 \u0647\u0627\u06cc DAO<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nabfollower.com\/blog\/the-dao-design-pattern-in-java-spring-boot-2l8o\/#%D9%BE%DB%8C%D8%A7%D8%AF%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%D8%B1%D8%A7%D8%A8%D8%B7_%D9%87%D8%A7%DB%8C_DAO\" >\u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0631\u0627\u0628\u0637 \u0647\u0627\u06cc DAO<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nabfollower.com\/blog\/the-dao-design-pattern-in-java-spring-boot-2l8o\/#%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D8%A7%D8%B2_%D8%B1%D8%A7%D8%A8%D8%B7_%D9%87%D8%A7%DB%8C_DAO\" >\u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0627\u0628\u0637 \u0647\u0627\u06cc DAO<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nabfollower.com\/blog\/the-dao-design-pattern-in-java-spring-boot-2l8o\/#%D9%86%D8%AA%DB%8C%D8%AC%D9%87\" >\u0646\u062a\u06cc\u062c\u0647<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%D8%B1%D8%A7%D9%87_%D8%A7%D9%86%D8%AF%D8%A7%D8%B2%DB%8C_%D9%BE%D8%B1%D9%88%DA%98%D9%87\"><\/span>\n<p>  \u0631\u0627\u0647 \u0627\u0646\u062f\u0627\u0632\u06cc \u067e\u0631\u0648\u0698\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u0631\u0627\u06cc \u0634\u0631\u0648\u0639 \u06a9\u0627\u0631 \u0628\u0627 \u0627\u0644\u06af\u0648\u06cc DAO \u062f\u0631 Java\/Spring Boot\u060c \u0628\u0627\u06cc\u062f \u06cc\u06a9 \u067e\u0631\u0648\u0698\u0647 Spring Boot \u062c\u062f\u06cc\u062f \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u062f \u0648 \u0648\u0627\u0628\u0633\u062a\u06af\u06cc \u0647\u0627\u06cc \u0644\u0627\u0632\u0645 \u0631\u0627 \u062f\u0631 \u0622\u0646 \u0644\u062d\u0627\u0638 \u06a9\u0646\u06cc\u062f.  \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u06cc\u06a9 \u0645\u062b\u0627\u0644 \u0627\u0633\u062a <code>pom.xml<\/code> \u0641\u0627\u06cc\u0644:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight xml\"><code><span class=\"nt\">&lt;dependencies&gt;<\/span>\n    <span class=\"c\">&lt;!-- Spring Boot dependencies --&gt;<\/span>\n    <span class=\"nt\">&lt;dependency&gt;<\/span>\n        <span class=\"nt\">&lt;groupId&gt;<\/span>org.springframework.boot<span class=\"nt\">&lt;\/groupId&gt;<\/span>\n        <span class=\"nt\">&lt;artifactId&gt;<\/span>spring-boot-starter-web<span class=\"nt\">&lt;\/artifactId&gt;<\/span>\n    <span class=\"nt\">&lt;\/dependency&gt;<\/span>\n    <span class=\"nt\">&lt;dependency&gt;<\/span>\n        <span class=\"nt\">&lt;groupId&gt;<\/span>org.springframework.boot<span class=\"nt\">&lt;\/groupId&gt;<\/span>\n        <span class=\"nt\">&lt;artifactId&gt;<\/span>spring-boot-starter-data-jpa<span class=\"nt\">&lt;\/artifactId&gt;<\/span>\n    <span class=\"nt\">&lt;\/dependency&gt;<\/span>\n\n    <span class=\"c\">&lt;!-- H2 database for testing --&gt;<\/span>\n    <span class=\"nt\">&lt;dependency&gt;<\/span>\n        <span class=\"nt\">&lt;groupId&gt;<\/span>com.h2database<span class=\"nt\">&lt;\/groupId&gt;<\/span>\n        <span class=\"nt\">&lt;artifactId&gt;<\/span>h2<span class=\"nt\">&lt;\/artifactId&gt;<\/span>\n        <span class=\"nt\">&lt;scope&gt;<\/span>test<span class=\"nt\">&lt;\/scope&gt;<\/span>\n    <span class=\"nt\">&lt;\/dependency&gt;<\/span>\n<span class=\"nt\">&lt;\/dependencies&gt;<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u062b\u0627\u0644\u060c \u0645\u0627 \u0631\u0627 \u06af\u0646\u062c\u0627\u0646\u062f\u0647 \u0627\u06cc\u0645 <code>spring-boot-starter-web<\/code> \u0648 <code>spring-boot-starter-data-jpa<\/code> \u0648\u0627\u0628\u0633\u062a\u06af\u06cc \u0647\u0627\u060c \u06a9\u0647 \u0645\u0624\u0644\u0641\u0647 \u0647\u0627\u06cc \u0644\u0627\u0632\u0645 \u0628\u0631\u0627\u06cc \u0633\u0627\u062e\u062a \u06cc\u06a9 \u0628\u0631\u0646\u0627\u0645\u0647 \u0648\u0628 \u0628\u0627 \u062f\u0633\u062a\u0631\u0633\u06cc \u0628\u0647 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0631\u0627 \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc \u06a9\u0646\u062f.  \u0645\u0627 \u0647\u0645\u0686\u0646\u06cc\u0646 \u0634\u0627\u0645\u0644 <code>h2<\/code> \u0648\u0627\u0628\u0633\u062a\u06af\u06cc \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0628\u0631\u0627\u06cc \u0627\u0647\u062f\u0627\u0641 \u0622\u0632\u0645\u0627\u06cc\u0634\u06cc<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D8%AA%D8%B9%D8%B1%DB%8C%D9%81_%D9%85%D9%88%D8%AC%D9%88%D8%AF%DB%8C%D8%AA_%D9%87%D8%A7\"><\/span>\n<p>  \u062a\u0639\u0631\u06cc\u0641 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u0647\u0627<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u062f\u0631 \u0627\u0644\u06af\u0648\u06cc DAO\u060c \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u0647\u0627 POJO \u0647\u0627\u06cc\u06cc \u0647\u0633\u062a\u0646\u062f \u06a9\u0647 \u0628\u0647 \u062c\u062f\u0627\u0648\u0644 \u062f\u0631 \u06cc\u06a9 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0631\u0627\u0628\u0637\u0647 \u0627\u06cc \u0646\u06af\u0627\u0634\u062a \u0645\u06cc \u0634\u0648\u0646\u062f.  \u0628\u0631\u0627\u06cc \u062a\u0639\u0631\u06cc\u0641 \u06cc\u06a9 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u062f\u0631 Spring Boot\u060c \u0628\u0627\u06cc\u062f \u06cc\u06a9 \u06a9\u0644\u0627\u0633 \u0628\u0627 \u062d\u0627\u0634\u06cc\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0645\u0646\u0627\u0633\u0628 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u062f\u060c \u0645\u0627\u0646\u0646\u062f <code>@Entity<\/code>\u060c <code>@Table<\/code>\u060c \u0648 <code>@Id<\/code>.  \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u06cc\u06a9 \u0645\u062b\u0627\u0644 \u0627\u0633\u062a:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight java\"><code><span class=\"nd\">@Entity<\/span>\n<span class=\"nd\">@Table<\/span><span class=\"o\">(<\/span><span class=\"n\">name<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"customers\"<\/span><span class=\"o\">)<\/span>\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Customer<\/span> <span class=\"o\">{<\/span>\n\n    <span class=\"nd\">@Id<\/span>\n    <span class=\"nd\">@GeneratedValue<\/span><span class=\"o\">(<\/span><span class=\"n\">strategy<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">GenerationType<\/span><span class=\"o\">.<\/span><span class=\"na\">IDENTITY<\/span><span class=\"o\">)<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">Long<\/span> <span class=\"n\">id<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"c1\">\/\/ getters and setters<\/span>\n<span class=\"o\">}<\/span>\n\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u062b\u0627\u0644\u060c a \u0631\u0627 \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 <code>Customer<\/code> \u0645\u0648\u062c\u0648\u062f\u06cc \u06a9\u0647 \u0628\u0647 a \u0646\u06af\u0627\u0634\u062a \u0645\u06cc \u0634\u0648\u062f <code>customers<\/code> \u062c\u062f\u0648\u0644 \u062f\u0631 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647  \u0645\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 <code>@Id<\/code> \u0648 <code>@GeneratedValue<\/code> \u062d\u0627\u0634\u06cc\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0628\u0631\u0627\u06cc \u0645\u0634\u062e\u0635 \u06a9\u0631\u062f\u0646 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u0648 \u06af\u0646\u062c\u0627\u0646\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a <code>firstName<\/code> \u0648 <code>lastName<\/code> \u0632\u0645\u06cc\u0646\u0647 \u0647\u0627\u06cc.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D8%AA%D8%B9%D8%B1%DB%8C%D9%81_%D8%B1%D8%A7%D8%A8%D8%B7_%D9%87%D8%A7%DB%8C_DAO\"><\/span>\n<p>  \u062a\u0639\u0631\u06cc\u0641 \u0631\u0627\u0628\u0637 \u0647\u0627\u06cc DAO<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0647\u0646\u06af\u0627\u0645\u06cc \u06a9\u0647 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u0647\u0627\u06cc \u062e\u0648\u062f \u0631\u0627 \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0631\u062f\u06cc\u062f\u060c \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0648\u0627\u0633\u0637 \u0647\u0627\u06cc DAO \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u062f \u06a9\u0647 \u0639\u0645\u0644\u06cc\u0627\u062a \u0642\u0627\u0628\u0644 \u0627\u0646\u062c\u0627\u0645 \u062f\u0631 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0631\u0627 \u062a\u0639\u0631\u06cc\u0641 \u0645\u06cc \u06a9\u0646\u062f.  \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u06cc\u06a9 \u0645\u062b\u0627\u0644 \u0631\u0627\u0628\u0637 DAO \u0628\u0631\u0627\u06cc \u0627\u06cc\u0646 \u0627\u0633\u062a <code>Customer<\/code> \u0648\u062c\u0648\u062f\u060c \u0645\u0648\u062c\u0648\u062f\u06cc\u062a:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight java\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">CustomerDao<\/span> <span class=\"o\">{<\/span>\n\n    <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">getAll<\/span><span class=\"o\">();<\/span>\n\n    <span class=\"nc\">Optional<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">getById<\/span><span class=\"o\">(<\/span><span class=\"nc\">Long<\/span> <span class=\"n\">id<\/span><span class=\"o\">);<\/span>\n\n    <span class=\"nc\">Customer<\/span> <span class=\"nf\">save<\/span><span class=\"o\">(<\/span><span class=\"nc\">Customer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">);<\/span>\n\n    <span class=\"kt\">void<\/span> <span class=\"nf\">delete<\/span><span class=\"o\">(<\/span><span class=\"nc\">Customer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">);<\/span>\n<span class=\"o\">}<\/span>\n\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u062b\u0627\u0644\u060c a \u0631\u0627 \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 <code>CustomerDao<\/code> \u0631\u0627\u0628\u0637\u06cc \u06a9\u0647 \u0634\u0627\u0645\u0644 \u0631\u0648\u0634 \u0647\u0627\u06cc\u06cc \u0628\u0631\u0627\u06cc \u0628\u0647 \u062f\u0633\u062a \u0622\u0648\u0631\u062f\u0646 \u0647\u0645\u0647 \u0645\u0634\u062a\u0631\u06cc\u0627\u0646\u060c \u062f\u0631\u06cc\u0627\u0641\u062a \u0645\u0634\u062a\u0631\u06cc \u0628\u0627 \u0634\u0646\u0627\u0633\u0647\u060c \u0630\u062e\u06cc\u0631\u0647 \u0645\u0634\u062a\u0631\u06cc \u0648 \u062d\u0630\u0641 \u0645\u0634\u062a\u0631\u06cc \u0627\u0633\u062a.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D9%BE%DB%8C%D8%A7%D8%AF%D9%87_%D8%B3%D8%A7%D8%B2%DB%8C_%D8%B1%D8%A7%D8%A8%D8%B7_%D9%87%D8%A7%DB%8C_DAO\"><\/span>\n<p>  \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0631\u0627\u0628\u0637 \u0647\u0627\u06cc DAO<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0628\u0631\u0627\u06cc \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u06cc\u06a9 \u0631\u0627\u0628\u0637 DAO\u060c \u0628\u0627\u06cc\u062f \u06a9\u0644\u0627\u0633\u06cc \u0627\u06cc\u062c\u0627\u062f \u06a9\u0646\u06cc\u062f \u06a9\u0647 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0648\u0627\u0642\u0639\u06cc \u0645\u062a\u062f\u0647\u0627 \u0631\u0627 \u0627\u0631\u0627\u0626\u0647 \u062f\u0647\u062f.  \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u06cc\u06a9 \u0646\u0645\u0648\u0646\u0647 \u0627\u0632 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u0627\u0633\u062a <code>CustomerDao<\/code> \u0631\u0627\u0628\u0637:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight java\"><code><span class=\"nd\">@Repository<\/span>\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">CustomerDaoImpl<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">CustomerDao<\/span> <span class=\"o\">{<\/span>\n\n    <span class=\"nd\">@Autowired<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">EntityManager<\/span> <span class=\"n\">entityManager<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">getAll<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">entityManager<\/span><span class=\"o\">.<\/span><span class=\"na\">createQuery<\/span><span class=\"o\">(<\/span><span class=\"s\">\"SELECT c FROM Customer c\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Customer<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">).<\/span><span class=\"na\">getResultList<\/span><span class=\"o\">();<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Optional<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">getById<\/span><span class=\"o\">(<\/span><span class=\"nc\">Long<\/span> <span class=\"n\">id<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"nc\">Optional<\/span><span class=\"o\">.<\/span><span class=\"na\">ofNullable<\/span><span class=\"o\">(<\/span><span class=\"n\">entityManager<\/span><span class=\"o\">.<\/span><span class=\"na\">find<\/span><span class=\"o\">(<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">,<\/span> <span class=\"n\">id<\/span><span class=\"o\">));<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Customer<\/span> <span class=\"nf\">save<\/span><span class=\"o\">(<\/span><span class=\"nc\">Customer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">entityManager<\/span><span class=\"o\">.<\/span><span class=\"na\">merge<\/span><span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">delete<\/span><span class=\"o\">(<\/span><span class=\"nc\">Customer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"n\">entityManager<\/span><span class=\"o\">.<\/span><span class=\"na\">remove<\/span><span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u062b\u0627\u0644\u060c \u0645\u0627 \u0631\u0627 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 <code>CustomerDao<\/code> \u0631\u0627\u0628\u0637 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 <code>EntityManager<\/code> \u062a\u0648\u0633\u0637 \u0627\u062c\u0631\u0627\u06cc JPA Spring Boot \u0627\u0631\u0627\u0626\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a.  \u0645\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 <code>@Repository<\/code> \u062d\u0627\u0634\u06cc\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0646\u0634\u0627\u0646 \u0645\u06cc \u062f\u0647\u062f \u06a9\u0647 \u0627\u06cc\u0646 \u06a9\u0644\u0627\u0633 \u0628\u0627\u06cc\u062f \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u062c\u0632\u0621 \u0645\u062e\u0632\u0646 \u062a\u0648\u0633\u0637 Spring Boot \u062f\u0631 \u0646\u0638\u0631 \u06af\u0631\u0641\u062a\u0647 \u0634\u0648\u062f.<\/p>\n<p>\u0627\u06cc\u0646 <code>getAll()<\/code> \u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f <code>createQuery()<\/code> \u0631\u0648\u0634 \u0627\u0632 <code>EntityManager<\/code> \u0628\u0631\u0627\u06cc \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u0647\u0645\u0647 <code>Customer<\/code> \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u0647\u0627 \u0627\u0632 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647  \u0627\u06cc\u0646 <code>getById()<\/code> \u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f <code>find()<\/code> \u0631\u0648\u0634 \u0627\u0632 <code>EntityManager<\/code> \u0628\u0631\u0627\u06cc \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc a <code>Customer<\/code> \u0646\u0647\u0627\u062f \u0628\u0627 \u0634\u0646\u0627\u0633\u0647  \u0627\u06cc\u0646 <code>save()<\/code> \u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f <code>merge()<\/code> \u0631\u0648\u0634 \u0627\u0632 <code>EntityManager<\/code> \u0628\u0631\u0627\u06cc \u0630\u062e\u06cc\u0631\u0647 \u06cc\u06a9 \u062c\u062f\u06cc\u062f \u06cc\u0627 \u0628\u0647 \u0631\u0648\u0632 \u0634\u062f\u0647 <code>Customer<\/code> \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u062f\u0631 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647  \u0627\u06cc\u0646 <code>delete()<\/code> \u0631\u0648\u0634 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f <code>remove()<\/code> \u0631\u0648\u0634 \u0627\u0632 <code>EntityManager<\/code> \u0628\u0631\u0627\u06cc \u062d\u0630\u0641 a <code>Customer<\/code> \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u0627\u0632 \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D8%A7%D8%B2_%D8%B1%D8%A7%D8%A8%D8%B7_%D9%87%D8%A7%DB%8C_DAO\"><\/span>\n<p>  \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0631\u0627\u0628\u0637 \u0647\u0627\u06cc DAO<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u06a9\u0646\u0648\u0646 \u06a9\u0647 \u0631\u0627\u0628\u0637 DAO \u062e\u0648\u062f \u0631\u0627 \u062a\u0639\u0631\u06cc\u0641 \u0648 \u067e\u06cc\u0627\u062f\u0647 \u0633\u0627\u0632\u06cc \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645\u060c \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u0645 \u0627\u0632 \u0622\u0646 \u062f\u0631 \u0628\u0631\u0646\u0627\u0645\u0647 \u062e\u0648\u062f \u0628\u0631\u0627\u06cc \u0627\u0646\u062c\u0627\u0645 \u0639\u0645\u0644\u06cc\u0627\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u0645.  \u062f\u0631 \u0627\u06cc\u0646\u062c\u0627 \u0645\u062b\u0627\u0644\u06cc \u0627\u0632 \u0646\u062d\u0648\u0647 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0622\u0646 \u0622\u0648\u0631\u062f\u0647 \u0634\u062f\u0647 \u0627\u0633\u062a <code>CustomerDao<\/code> \u0631\u0627\u0628\u0637 \u062f\u0631 \u06a9\u0644\u0627\u0633 \u06a9\u0646\u062a\u0631\u0644\u0631:<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight java\"><code><span class=\"nd\">@RestController<\/span>\n<span class=\"nd\">@RequestMapping<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\/customers\"<\/span><span class=\"o\">)<\/span>\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">CustomerController<\/span> <span class=\"o\">{<\/span>\n\n    <span class=\"nd\">@Autowired<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">CustomerDao<\/span> <span class=\"n\">customerDao<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"nd\">@GetMapping<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">getAllCustomers<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"n\">customerDao<\/span><span class=\"o\">.<\/span><span class=\"na\">getAll<\/span><span class=\"o\">();<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"nd\">@GetMapping<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\/{id}\"<\/span><span class=\"o\">)<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">getCustomerById<\/span><span class=\"o\">(<\/span><span class=\"nd\">@PathVariable<\/span> <span class=\"nc\">Long<\/span> <span class=\"n\">id<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"nc\">Optional<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">customer<\/span> <span class=\"o\">=<\/span> <span class=\"n\">customerDao<\/span><span class=\"o\">.<\/span><span class=\"na\">getById<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"o\">);<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">.<\/span><span class=\"na\">isPresent<\/span><span class=\"o\">())<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">return<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">.<\/span><span class=\"na\">ok<\/span><span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">());<\/span>\n        <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">return<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">.<\/span><span class=\"na\">notFound<\/span><span class=\"o\">().<\/span><span class=\"na\">build<\/span><span class=\"o\">();<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"nd\">@PostMapping<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">createCustomer<\/span><span class=\"o\">(<\/span><span class=\"nd\">@RequestBody<\/span> <span class=\"nc\">Customer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"nc\">Customer<\/span> <span class=\"n\">savedCustomer<\/span> <span class=\"o\">=<\/span> <span class=\"n\">customerDao<\/span><span class=\"o\">.<\/span><span class=\"na\">save<\/span><span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">);<\/span>\n        <span class=\"k\">return<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">.<\/span><span class=\"na\">created<\/span><span class=\"o\">(<\/span><span class=\"no\">URI<\/span><span class=\"o\">.<\/span><span class=\"na\">create<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\/customers\/\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">savedCustomer<\/span><span class=\"o\">.<\/span><span class=\"na\">getId<\/span><span class=\"o\">())).<\/span><span class=\"na\">body<\/span><span class=\"o\">(<\/span><span class=\"n\">savedCustomer<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"nd\">@PutMapping<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\/{id}\"<\/span><span class=\"o\">)<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">updateCustomer<\/span><span class=\"o\">(<\/span><span class=\"nd\">@PathVariable<\/span> <span class=\"nc\">Long<\/span> <span class=\"n\">id<\/span><span class=\"o\">,<\/span> <span class=\"nd\">@RequestBody<\/span> <span class=\"nc\">Customer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"nc\">Optional<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">existingCustomer<\/span> <span class=\"o\">=<\/span> <span class=\"n\">customerDao<\/span><span class=\"o\">.<\/span><span class=\"na\">getById<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"o\">);<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">existingCustomer<\/span><span class=\"o\">.<\/span><span class=\"na\">isPresent<\/span><span class=\"o\">())<\/span> <span class=\"o\">{<\/span>\n            <span class=\"n\">customer<\/span><span class=\"o\">.<\/span><span class=\"na\">setId<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"o\">);<\/span>\n            <span class=\"nc\">Customer<\/span> <span class=\"n\">savedCustomer<\/span> <span class=\"o\">=<\/span> <span class=\"n\">customerDao<\/span><span class=\"o\">.<\/span><span class=\"na\">save<\/span><span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">);<\/span>\n            <span class=\"k\">return<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">.<\/span><span class=\"na\">ok<\/span><span class=\"o\">(<\/span><span class=\"n\">savedCustomer<\/span><span class=\"o\">);<\/span>\n        <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">return<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">.<\/span><span class=\"na\">notFound<\/span><span class=\"o\">().<\/span><span class=\"na\">build<\/span><span class=\"o\">();<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"nd\">@DeleteMapping<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\/{id}\"<\/span><span class=\"o\">)<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Void<\/span><span class=\"o\">&gt;<\/span> <span class=\"nf\">deleteCustomer<\/span><span class=\"o\">(<\/span><span class=\"nd\">@PathVariable<\/span> <span class=\"nc\">Long<\/span> <span class=\"n\">id<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"nc\">Optional<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Customer<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">customer<\/span> <span class=\"o\">=<\/span> <span class=\"n\">customerDao<\/span><span class=\"o\">.<\/span><span class=\"na\">getById<\/span><span class=\"o\">(<\/span><span class=\"n\">id<\/span><span class=\"o\">);<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">.<\/span><span class=\"na\">isPresent<\/span><span class=\"o\">())<\/span> <span class=\"o\">{<\/span>\n            <span class=\"n\">customerDao<\/span><span class=\"o\">.<\/span><span class=\"na\">delete<\/span><span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">());<\/span>\n            <span class=\"k\">return<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">.<\/span><span class=\"na\">noContent<\/span><span class=\"o\">().<\/span><span class=\"na\">build<\/span><span class=\"o\">();<\/span>\n        <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\n            <span class=\"k\">return<\/span> <span class=\"nc\">ResponseEntity<\/span><span class=\"o\">.<\/span><span class=\"na\">notFound<\/span><span class=\"o\">().<\/span><span class=\"na\">build<\/span><span class=\"o\">();<\/span>\n        <span class=\"o\">}<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>\u062f\u0631 \u0627\u06cc\u0646 \u0645\u062b\u0627\u0644\u060c \u0645\u0627 \u06cc\u06a9 \u0631\u0627 \u0627\u06cc\u062c\u0627\u062f \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 <code>CustomerController<\/code> \u06a9\u0644\u0627\u0633\u06cc \u06a9\u0647 \u0627\u0632 <code>CustomerDao<\/code> \u0631\u0627\u0628\u0637 \u0628\u0631\u0627\u06cc \u0627\u0646\u062c\u0627\u0645 \u0639\u0645\u0644\u06cc\u0627\u062a CRUD (\u0627\u06cc\u062c\u0627\u062f\u060c \u062e\u0648\u0627\u0646\u062f\u0646\u060c \u0628\u0647 \u0631\u0648\u0632 \u0631\u0633\u0627\u0646\u06cc\u060c \u062d\u0630\u0641) \u0628\u0631 \u0631\u0648\u06cc <code>Customer<\/code>** \u0648\u062c\u0648\u062f\u060c \u0645\u0648\u062c\u0648\u062f\u06cc\u062a.  \u0645\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0631\u062f\u0647 \u0627\u06cc\u0645 <code>@Autowired<\/code> \u062d\u0627\u0634\u06cc\u0647 \u0646\u0648\u06cc\u0633\u06cc \u0628\u0631\u0627\u06cc \u062a\u0632\u0631\u06cc\u0642 \u06cc\u06a9 \u0646\u0645\u0648\u0646\u0647 \u0627\u0632 <code>CustomerDao<\/code> \u0631\u0627\u0628\u0637 \u0628\u0647 \u06a9\u0646\u062a\u0631\u0644\u0631<\/p>\n<p>\u0627\u06cc\u0646 <code>getAllCustomers()<\/code> \u0645\u062a\u062f \u0644\u06cc\u0633\u062a\u06cc \u0627\u0632 \u0647\u0645\u0647 \u0645\u0634\u062a\u0631\u06cc\u0627\u0646 \u0631\u0627 \u0628\u0631\u0645\u06cc \u06af\u0631\u062f\u0627\u0646\u062f.  \u0627\u06cc\u0646 <code>getCustomerById()<\/code> \u0631\u0648\u0634 \u06cc\u06a9 \u0645\u0634\u062a\u0631\u06cc \u0631\u0627 \u0628\u0627 \u0634\u0646\u0627\u0633\u0647 \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u0645\u06cc \u06a9\u0646\u062f.  \u0627\u06cc\u0646 <code>createCustomer()<\/code> \u0631\u0648\u0634 \u06cc\u06a9 \u0645\u0634\u062a\u0631\u06cc \u062c\u062f\u06cc\u062f \u0631\u0627 \u0646\u062c\u0627\u062a \u0645\u06cc \u062f\u0647\u062f.  \u0627\u06cc\u0646 <code>updateCustomer()<\/code> \u0631\u0648\u0634 \u06cc\u06a9 \u0645\u0634\u062a\u0631\u06cc \u0645\u0648\u062c\u0648\u062f \u0631\u0627 \u0628\u0647 \u0631\u0648\u0632 \u0645\u06cc \u06a9\u0646\u062f.  \u0627\u06cc\u0646 <code>deleteCustomer()<\/code> \u0631\u0648\u0634 \u06cc\u06a9 \u0645\u0634\u062a\u0631\u06cc \u0631\u0627 \u062d\u0630\u0641 \u0645\u06cc \u06a9\u0646\u062f<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D9%86%D8%AA%DB%8C%D8%AC%D9%87\"><\/span>\n<p>  \u0646\u062a\u06cc\u062c\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0627\u0644\u06af\u0648\u06cc DAO \u06cc\u06a9 \u0631\u0627\u0647 \u0642\u062f\u0631\u062a\u0645\u0646\u062f \u0628\u0631\u0627\u06cc \u0627\u0646\u062a\u0632\u0627\u0639 \u06a9\u0631\u062f\u0646 \u062c\u0632\u0626\u06cc\u0627\u062a \u0639\u0645\u0644\u06cc\u0627\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0648 \u0628\u0647\u0628\u0648\u062f \u0642\u0627\u0628\u0644\u06cc\u062a \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0648 \u0622\u0632\u0645\u0627\u06cc\u0634 \u067e\u0630\u06cc\u0631\u06cc \u06a9\u062f \u0634\u0645\u0627 \u0627\u0633\u062a.  \u0627\u0645\u06cc\u062f\u0648\u0627\u0631\u0645 \u0627\u06cc\u0646 \u0645\u0641\u06cc\u062f \u0628\u0648\u062f\u0647 \u0628\u0627\u0634\u062f \u0648 \u0627\u06a9\u0646\u0648\u0646 \u0628\u062a\u0648\u0627\u0646\u06cc\u062f \u0627\u0632 \u0627\u0644\u06af\u0648\u06cc DAO \u062f\u0631 \u067e\u0631\u0648\u0698\u0647 \u0647\u0627\u06cc \u062e\u0648\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f.<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u0627\u0644\u06af\u0648\u06cc \u0637\u0631\u0627\u062d\u06cc DAO (Data Access Object) \u06cc\u06a9 \u0631\u0648\u0634 \u0645\u062d\u0628\u0648\u0628 \u0628\u0631\u0627\u06cc \u062c\u062f\u0627\u0633\u0627\u0632\u06cc \u0644\u0627\u06cc\u0647 \u067e\u0627\u06cc\u062f\u0627\u0631\u06cc \u0627\u0632 \u0628\u0642\u06cc\u0647 \u0628\u0631\u0646\u0627\u0645\u0647 \u0634\u0645\u0627 \u0627\u0633\u062a. \u0627\u06cc\u0646 \u0631\u0648\u0634\u06cc \u0628\u0631\u0627\u06cc \u0627\u0646\u062a\u0632\u0627\u0639 \u06a9\u0631\u062f\u0646 \u062c\u0632\u0626\u06cc\u0627\u062a \u0639\u0645\u0644\u06cc\u0627\u062a \u067e\u0627\u06cc\u06af\u0627\u0647 \u062f\u0627\u062f\u0647 \u0641\u0631\u0627\u0647\u0645 \u0645\u06cc \u06a9\u0646\u062f \u0648 \u0628\u0647 \u0628\u0647\u0628\u0648\u062f \u0642\u0627\u0628\u0644\u06cc\u062a \u0646\u06af\u0647\u062f\u0627\u0631\u06cc \u0648 \u0622\u0632\u0645\u0627\u06cc\u0634 \u067e\u0630\u06cc\u0631\u06cc \u06a9\u062f \u0634\u0645\u0627 \u06a9\u0645\u06a9 \u0645\u06cc \u06a9\u0646\u062f. \u062f\u0631 \u0627\u06cc\u0646 \u067e\u0633\u062a \u0648\u0628\u0644\u0627\u06af\u060c \u0627\u0644\u06af\u0648\u06cc DAO \u0631\u0627 \u062f\u0631 Java\/Spring Boot \u0628\u0631\u0631\u0633\u06cc \u0645\u06cc\u200c\u06a9\u0646\u06cc\u0645 &hellip;<\/p>\n","protected":false},"author":2,"featured_media":10099,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[339],"tags":[],"class_list":["post-10098","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dev"],"_links":{"self":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/10098","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/comments?post=10098"}],"version-history":[{"count":0,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/10098\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media\/10099"}],"wp:attachment":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media?parent=10098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/categories?post=10098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/tags?post=10098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}