{"id":96412,"date":"2025-02-07T13:18:54","date_gmt":"2025-02-07T09:48:54","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/"},"modified":"2025-02-07T13:18:54","modified_gmt":"2025-02-07T09:48:54","slug":"hibernate-004-paideid-class","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/","title":{"rendered":"Hibernate-004: PaideId.Class"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 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-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#PaymentId_%DA%A9%D9%84%D8%A7%D8%B3_%D8%A8%D9%87%D8%AA%D8%B1%DB%8C%D9%86_%D8%B4%DB%8C%D9%88%D9%87_%D9%87%D8%A7\" >PaymentId  \u06a9\u0644\u0627\u0633 (\u0628\u0647\u062a\u0631\u06cc\u0646 \u0634\u06cc\u0648\u0647 \u0647\u0627)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#%D8%AA%D9%88%D8%B6%DB%8C%D8%AD_%D8%AF%D9%82%DB%8C%D9%82\" >\u062a\u0648\u0636\u06cc\u062d \u062f\u0642\u06cc\u0642<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#1_%DA%86%D8%B1%D8%A7_Serializable%D8%9F\" >1. \u0686\u0631\u0627 Serializable\u061f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#2_%DA%86%D8%B1%D8%A7_%DB%8C%DA%A9_%D8%B3%D8%A7%D8%B2%D9%86%D8%AF%D9%87_%D8%A8%D8%AF%D9%88%D9%86_ARG%D8%9F\" >2. \u0686\u0631\u0627 \u06cc\u06a9 \u0633\u0627\u0632\u0646\u062f\u0647 \u0628\u062f\u0648\u0646 ARG\u061f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#3_%DA%86%D8%B1%D8%A7_%DA%AF%DB%8C%D8%B1%D9%86%D8%AF%D9%87_%D9%87%D8%A7_%D9%88_%D8%AA%D9%86%D8%B8%DB%8C%D9%85_%DA%A9%D9%86%D9%86%D8%AF%D9%87_%D9%87%D8%A7%D8%9F\" >3. \u0686\u0631\u0627 \u06af\u06cc\u0631\u0646\u062f\u0647 \u0647\u0627 \u0648 \u062a\u0646\u0638\u06cc\u0645 \u06a9\u0646\u0646\u062f\u0647 \u0647\u0627\u061f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#4_%DA%86%D8%B1%D8%A7_%D9%86%D8%A7%D8%AF%DB%8C%D8%AF%D9%87_%DA%AF%D8%B1%D9%81%D8%AA%D9%86_equals_%D9%88%D8%AA_hashCode%D8%9F\" >4. \u0686\u0631\u0627 \u0646\u0627\u062f\u06cc\u062f\u0647 \u06af\u0631\u0641\u062a\u0646 equals() \u0648\u062a hashCode()\u061f<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#%DA%86%DA%AF%D9%88%D9%86%D9%87_JPA_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D9%85%DB%8C_%DA%A9%D9%86%D8%AF_PaymentId\" >\u0686\u06af\u0648\u0646\u0647 JPA \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f PaymentId<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#%D9%85%D8%AB%D8%A7%D9%84_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D8%A7%D8%B2_PaymentId_%D8%A8%D8%B1%D8%A7%DB%8C_%DB%8C%D8%A7%D9%81%D8%AA%D9%86_%DB%8C%DA%A9_%D9%85%D9%88%D8%AC%D9%88%D8%AF\" >\u0645\u062b\u0627\u0644: \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 PaymentId \u0628\u0631\u0627\u06cc \u06cc\u0627\u0641\u062a\u0646 \u06cc\u06a9 \u0645\u0648\u062c\u0648\u062f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#%D8%B1%D9%88%DB%8C%DA%A9%D8%B1%D8%AF_%D8%AC%D8%A7%DB%8C%DA%AF%D8%B2%DB%8C%D9%86_EmbeddedId\" >\u0631\u0648\u06cc\u06a9\u0631\u062f \u062c\u0627\u06cc\u06af\u0632\u06cc\u0646: @EmbeddedId<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nabfollower.com\/blog\/hibernate-004-paideid-class\/#%D8%A7%D9%81%DA%A9%D8%A7%D8%B1_%D9%86%D9%87%D8%A7%DB%8C%DB%8C\" >\u0627\u0641\u06a9\u0627\u0631 \u0646\u0647\u0627\u06cc\u06cc<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"PaymentId_%DA%A9%D9%84%D8%A7%D8%B3_%D8%A8%D9%87%D8%AA%D8%B1%DB%8C%D9%86_%D8%B4%DB%8C%D9%88%D9%87_%D9%87%D8%A7\"><\/span>\n<p>  <strong><code>PaymentId<\/code>  \u06a9\u0644\u0627\u0633 (\u0628\u0647\u062a\u0631\u06cc\u0646 \u0634\u06cc\u0648\u0647 \u0647\u0627)<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight java\"><code><span class=\"kn\">import<\/span> <span class=\"nn\">java.io.Serializable<\/span><span class=\"o\">;<\/span>\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.util.Objects<\/span><span class=\"o\">;<\/span>\n\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">PaymentId<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Serializable<\/span> <span class=\"o\">{<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">Integer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">;<\/span>  <span class=\"c1\">\/\/ Must match the type of Payment.customer (Customer's ID)<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">checkNumber<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"c1\">\/\/ Default constructor (required by JPA)<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nf\">PaymentId<\/span><span class=\"o\">()<\/span> <span class=\"o\">{}<\/span>\n\n    <span class=\"c1\">\/\/ Parameterized constructor for convenience<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nf\">PaymentId<\/span><span class=\"o\">(<\/span><span class=\"nc\">Integer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">checkNumber<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">customer<\/span> <span class=\"o\">=<\/span> <span class=\"n\">customer<\/span><span class=\"o\">;<\/span>\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">checkNumber<\/span> <span class=\"o\">=<\/span> <span class=\"n\">checkNumber<\/span><span class=\"o\">;<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"c1\">\/\/ Getters and Setters (JPA needs these)<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"nc\">Integer<\/span> <span class=\"nf\">getCustomer<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span> <span class=\"k\">return<\/span> <span class=\"n\">customer<\/span><span class=\"o\">;<\/span> <span class=\"o\">}<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">setCustomer<\/span><span class=\"o\">(<\/span><span class=\"nc\">Integer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">customer<\/span> <span class=\"o\">=<\/span> <span class=\"n\">customer<\/span><span class=\"o\">;<\/span> <span class=\"o\">}<\/span>\n\n    <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">getCheckNumber<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span> <span class=\"k\">return<\/span> <span class=\"n\">checkNumber<\/span><span class=\"o\">;<\/span> <span class=\"o\">}<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">setCheckNumber<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">checkNumber<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">checkNumber<\/span> <span class=\"o\">=<\/span> <span class=\"n\">checkNumber<\/span><span class=\"o\">;<\/span> <span class=\"o\">}<\/span>\n\n    <span class=\"c1\">\/\/ Override equals() to compare objects logically<\/span>\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"kt\">boolean<\/span> <span class=\"nf\">equals<\/span><span class=\"o\">(<\/span><span class=\"nc\">Object<\/span> <span class=\"n\">o<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"k\">this<\/span> <span class=\"o\">==<\/span> <span class=\"n\">o<\/span><span class=\"o\">)<\/span> <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"o\">;<\/span>\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">o<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span> <span class=\"o\">||<\/span> <span class=\"n\">getClass<\/span><span class=\"o\">()<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">o<\/span><span class=\"o\">.<\/span><span class=\"na\">getClass<\/span><span class=\"o\">())<\/span> <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\n        <span class=\"nc\">PaymentId<\/span> <span class=\"n\">that<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">PaymentId<\/span><span class=\"o\">)<\/span> <span class=\"n\">o<\/span><span class=\"o\">;<\/span>\n        <span class=\"k\">return<\/span> <span class=\"nc\">Objects<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">,<\/span> <span class=\"n\">that<\/span><span class=\"o\">.<\/span><span class=\"na\">customer<\/span><span class=\"o\">)<\/span> <span class=\"o\">&amp;&amp;<\/span>\n               <span class=\"nc\">Objects<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">checkNumber<\/span><span class=\"o\">,<\/span> <span class=\"n\">that<\/span><span class=\"o\">.<\/span><span class=\"na\">checkNumber<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n\n    <span class=\"c1\">\/\/ Override hashCode() to ensure correct behavior in HashMap, HashSet, etc.<\/span>\n    <span class=\"nd\">@Override<\/span>\n    <span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">hashCode<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\n        <span class=\"k\">return<\/span> <span class=\"nc\">Objects<\/span><span class=\"o\">.<\/span><span class=\"na\">hash<\/span><span class=\"o\">(<\/span><span class=\"n\">customer<\/span><span class=\"o\">,<\/span> <span class=\"n\">checkNumber<\/span><span class=\"o\">);<\/span>\n    <span class=\"o\">}<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"%D8%AA%D9%88%D8%B6%DB%8C%D8%AD_%D8%AF%D9%82%DB%8C%D9%82\"><\/span>\n<p>  <strong>\u062a\u0648\u0636\u06cc\u062d \u062f\u0642\u06cc\u0642<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"1_%DA%86%D8%B1%D8%A7_Serializable%D8%9F\"><\/span>\n<p>  <strong>1. \u0686\u0631\u0627 <code>Serializable<\/code>\u061f<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>\u062f\u0631 <code>PaymentId<\/code> \u0637\u0628\u0642\u0647 <strong>\u0628\u0627\u06cc\u062f<\/strong> \u0627\u062c\u0631\u0627 <code>Serializable<\/code>\u060c \u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 JPA \u0647\u0646\u06af\u0627\u0645 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u0627\u0648\u0644\u06cc\u0647 \u0627\u0632 \u0633\u0631\u06cc\u0627\u0644 \u0633\u0627\u0632\u06cc \u062f\u0627\u062e\u0644\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f <code>@IdClass<\/code>\u0628\u0634\u0631<\/li>\n<li>\u0628\u062f\u0648\u0646 <code>Serializable<\/code>\u060c JPA \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u062f\u0631 \u0632\u0645\u0627\u0646 \u0627\u062c\u0631\u0627 \u0634\u06a9\u0633\u062a \u0628\u062e\u0648\u0631\u062f.<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"2_%DA%86%D8%B1%D8%A7_%DB%8C%DA%A9_%D8%B3%D8%A7%D8%B2%D9%86%D8%AF%D9%87_%D8%A8%D8%AF%D9%88%D9%86_ARG%D8%9F\"><\/span>\n<p>  <strong>2. \u0686\u0631\u0627 \u06cc\u06a9 \u0633\u0627\u0632\u0646\u062f\u0647 \u0628\u062f\u0648\u0646 ARG\u061f<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>JPA <strong>\u0645\u0633\u062a\u0644\u0632\u0645<\/strong> \u06cc\u06a9 \u0633\u0627\u0632\u0646\u062f\u0647 \u0628\u062f\u0648\u0646 \u0622\u0631\u06cc\u0634 \u0628\u0631\u0627\u06cc \u0641\u0648\u0631\u06cc \u0645\u0648\u062c\u0648\u062f\u06cc\u062a.<\/li>\n<li>\u0627\u06af\u0631 \u0628\u0647 \u0635\u0631\u0627\u062d\u062a \u062a\u0639\u0631\u06cc\u0641 \u0646\u0634\u062f\u0647 \u0628\u0627\u0634\u062f \u060c JPA \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0647\u0646\u06af\u0627\u0645 \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u0645\u0648\u062c\u0648\u062f\u0627\u062a \u062e\u0637\u0627 \u06a9\u0646\u062f.<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"3_%DA%86%D8%B1%D8%A7_%DA%AF%DB%8C%D8%B1%D9%86%D8%AF%D9%87_%D9%87%D8%A7_%D9%88_%D8%AA%D9%86%D8%B8%DB%8C%D9%85_%DA%A9%D9%86%D9%86%D8%AF%D9%87_%D9%87%D8%A7%D8%9F\"><\/span>\n<p>  <strong>3. \u0686\u0631\u0627 \u06af\u06cc\u0631\u0646\u062f\u0647 \u0647\u0627 \u0648 \u062a\u0646\u0638\u06cc\u0645 \u06a9\u0646\u0646\u062f\u0647 \u0647\u0627\u061f<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>\u0647\u0631 \u0686\u0646\u062f <code>@IdClass<\/code> \u0627\u0632 \u06a9\u0627\u0631 <strong>\u0646\u0647<\/strong> \u0628\u0647 \u0635\u0631\u0627\u062d\u062a \u0628\u0647 \u06af\u06cc\u0631\u0646\u062f\u0647 \u0647\u0627 \u0648 \u062a\u0646\u0638\u06cc\u0645 \u06a9\u0646\u0646\u062f\u0647 \u0647\u0627 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0631\u06cc\u062f \u060c \u0627\u06cc\u0646 \u0628\u0647\u062a\u0631\u06cc\u0646 \u0639\u0645\u0644 \u0627\u0633\u062a \u0632\u06cc\u0631\u0627:\n<ul>\n<li>\u0628\u0631\u062e\u06cc \u0627\u0632 \u0686\u0627\u0631\u0686\u0648\u0628 \u0647\u0627 (\u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u0645\u062b\u0627\u0644 \u060c \u062e\u0648\u0627\u0628 \u0632\u0645\u0633\u062a\u0627\u0646\u06cc) \u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0622\u0646\u0647\u0627 \u0631\u0627 \u0628\u0631\u0627\u06cc \u067e\u0631\u0648\u06a9\u0633\u06cc \u0647\u0627 \u0646\u06cc\u0627\u0632 \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u0646\u062f.<\/li>\n<li>\u0627\u06cc\u0646 \u0633\u0627\u0632\u06af\u0627\u0631\u06cc \u0628\u0627 \u06a9\u0646\u0648\u0627\u0646\u0633\u06cc\u0648\u0646 \u0647\u0627\u06cc Javabeans \u0631\u0627 \u062a\u0636\u0645\u06cc\u0646 \u0645\u06cc \u06a9\u0646\u062f.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"4_%DA%86%D8%B1%D8%A7_%D9%86%D8%A7%D8%AF%DB%8C%D8%AF%D9%87_%DA%AF%D8%B1%D9%81%D8%AA%D9%86_equals_%D9%88%D8%AA_hashCode%D8%9F\"><\/span>\n<p>  <strong>4. \u0686\u0631\u0627 \u0646\u0627\u062f\u06cc\u062f\u0647 \u06af\u0631\u0641\u062a\u0646 <code>equals()<\/code> \u0648\u062a <code>hashCode()<\/code>\u061f<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>\u0627\u06cc\u0646 \u0631\u0648\u0634\u0647\u0627 \u0627\u0632 \u0645\u0642\u0627\u06cc\u0633\u0647 \u0645\u0646\u0627\u0633\u0628 \u0628\u0631\u0627\u0628\u0631\u06cc \u0634\u06cc\u0621 \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u062d\u0627\u0635\u0644 \u0645\u06cc \u06a9\u0646\u0646\u062f \u060c \u06a9\u0647 \u062f\u0631 \u0645\u0648\u0627\u0631\u062f\u06cc \u0628\u0633\u06cc\u0627\u0631 \u0645\u0647\u0645 \u0627\u0633\u062a:\n<ul>\n<li>\u0630\u062e\u06cc\u0631\u0647 \u0627\u0634\u06cc\u0627 \u062f\u0631 a <code>Set<\/code> (\u0627\u0632 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u062a\u06a9\u0631\u0627\u0631\u06cc \u062e\u0648\u062f\u062f\u0627\u0631\u06cc \u06a9\u0646\u06cc\u062f).<\/li>\n<li>\u0645\u0648\u062c\u0648\u062f\u0627\u062a \u0628\u0627 \u06a9\u0644\u06cc\u062f\u0647\u0627\u06cc \u06a9\u0627\u0645\u067e\u0648\u0632\u06cc\u062a.<\/li>\n<li>\u062c\u0644\u0648\u06af\u06cc\u0631\u06cc \u0627\u0632 \u0646\u0627\u0633\u0627\u0632\u06af\u0627\u0631\u06cc \u0647\u0646\u06af\u0627\u0645 \u0645\u062f\u06cc\u0631\u06cc\u062a \u0631\u0648\u0627\u0628\u0637 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%DA%86%DA%AF%D9%88%D9%86%D9%87_JPA_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D9%85%DB%8C_%DA%A9%D9%86%D8%AF_PaymentId\"><\/span>\n<p>  <strong>\u0686\u06af\u0648\u0646\u0647 JPA \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f <code>PaymentId<\/code><\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>\n<strong>\u0647\u0646\u06af\u0627\u0645 \u0627\u06cc\u062c\u0627\u062f <code>Payment<\/code> \u0645\u0648\u062c\u0648\u062f\u06cc\u062a<\/strong>\u060c JPA \u0628\u0631\u0631\u0633\u06cc \u0645\u06cc \u06a9\u0646\u062f \u06a9\u0647 \u0622\u06cc\u0627 \u06cc\u06a9 \u0645\u0648\u062c\u0648\u062f \u0628\u0627 \u0647\u0645\u0627\u0646 <code>PaymentId<\/code> \u0642\u0628\u0644\u0627\u064b \u0642\u0628\u0644 \u0627\u0632 \u0648\u0627\u0631\u062f \u06a9\u0631\u062f\u0646 \u06cc\u06a9 \u0645\u0648\u0631\u062f \u062c\u062f\u06cc\u062f \u0648\u062c\u0648\u062f \u062f\u0627\u0631\u062f.<\/li>\n<li>\n<strong>\u0647\u0646\u06af\u0627\u0645 \u0648\u0627\u06a9\u0634\u06cc a <code>Payment<\/code> \u0645\u0648\u062c\u0648\u062f\u06cc\u062a<\/strong>\u060c JPA \u06a9\u0644\u06cc\u062f \u0631\u0627 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0628\u0627\u0632\u0633\u0627\u0632\u06cc \u0645\u06cc \u06a9\u0646\u062f <code>PaymentId<\/code> \u0648 \u0648\u0631\u0648\u062f\u06cc \u0635\u062d\u06cc\u062d \u0631\u0627 \u0628\u0627\u0632\u06cc\u0627\u0628\u06cc \u0645\u06cc \u06a9\u0646\u062f.<\/li>\n<li>\n<strong>\u0647\u0646\u06af\u0627\u0645 \u062d\u0630\u0641 a <code>Payment<\/code> \u0645\u0648\u062c\u0648\u062f\u06cc\u062a<\/strong>\u060c JPA \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u06a9\u0646\u062f <code>PaymentId<\/code> \u0628\u0631\u0627\u06cc \u06cc\u0627\u0641\u062a\u0646 \u0631\u06a9\u0648\u0631\u062f<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"%D9%85%D8%AB%D8%A7%D9%84_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87_%D8%A7%D8%B2_PaymentId_%D8%A8%D8%B1%D8%A7%DB%8C_%DB%8C%D8%A7%D9%81%D8%AA%D9%86_%DB%8C%DA%A9_%D9%85%D9%88%D8%AC%D9%88%D8%AF\"><\/span>\n<p>  <strong>\u0645\u062b\u0627\u0644: \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 <code>PaymentId<\/code> \u0628\u0631\u0627\u06cc \u06cc\u0627\u0641\u062a\u0646 \u06cc\u06a9 \u0645\u0648\u062c\u0648\u062f<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight java\"><code><span class=\"nd\">@EntityManager<\/span> <span class=\"n\">entityManager<\/span> <span class=\"o\">=<\/span> <span class=\"o\">...;<\/span>\n<span class=\"nc\">PaymentId<\/span> <span class=\"n\">paymentId<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">PaymentId<\/span><span class=\"o\">(<\/span><span class=\"mi\">103<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"CHK123456\"<\/span><span class=\"o\">);<\/span>  <span class=\"c1\">\/\/ Composite Key<\/span>\n<span class=\"nc\">Payment<\/span> <span class=\"n\">payment<\/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\">Payment<\/span><span class=\"o\">.<\/span><span class=\"na\">class<\/span><span class=\"o\">,<\/span> <span class=\"n\">paymentId<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<ul>\n<li>\u0627\u06cc\u0646\u062c\u0627 \u060c JPA <strong>\u0628\u0637\u0648\u0631 \u062e\u0648\u062f\u06a9\u0627\u0631<\/strong> \u0646\u0642\u0634\u0647 \u0647\u0627 <code>customer<\/code> \u0648\u062a <code>checkNumber<\/code> \u0632\u0645\u06cc\u0646\u0647 \u0647\u0627 \u0627\u0632 <code>PaymentId<\/code> \u0628\u0647 \u0645\u0631\u0628\u0648\u0637\u0647 <code>@Id<\/code> \u0645\u0632\u0627\u0631\u0639 \u062f\u0631 <code>Payment<\/code>\u0628\u0634\u0631<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%D8%B1%D9%88%DB%8C%DA%A9%D8%B1%D8%AF_%D8%AC%D8%A7%DB%8C%DA%AF%D8%B2%DB%8C%D9%86_EmbeddedId\"><\/span>\n<p>  <strong>\u0631\u0648\u06cc\u06a9\u0631\u062f \u062c\u0627\u06cc\u06af\u0632\u06cc\u0646: <code>@EmbeddedId<\/code><\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0631\u0627\u0647 \u062f\u06cc\u06af\u0631 \u0628\u0631\u0627\u06cc \u062a\u0639\u0631\u06cc\u0641 \u06a9\u0644\u06cc\u062f \u06a9\u0627\u0645\u067e\u0648\u0632\u06cc\u062a \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0633\u062a <code>@EmbeddedId<\/code>\u060c \u06a9\u0647 \u06a9\u0644\u06cc\u062f \u0627\u0635\u0644\u06cc \u0631\u0627 \u062f\u0631 \u062f\u0627\u062e\u0644 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u062c\u0627\u0633\u0627\u0632\u06cc \u0645\u06cc \u06a9\u0646\u062f.<\/p>\n<p><strong>\u0628\u0627 <code>@EmbeddedId<\/code>:<\/strong>\n<\/p>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight java\"><code><span class=\"nd\">@Embeddable<\/span>\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">PaymentId<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Serializable<\/span> <span class=\"o\">{<\/span>\n    <span class=\"nd\">@ManyToOne<\/span>\n    <span class=\"nd\">@JoinColumn<\/span><span class=\"o\">(<\/span><span class=\"n\">name<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"customerNumber\"<\/span><span class=\"o\">)<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">Customer<\/span> <span class=\"n\">customer<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"nd\">@Column<\/span><span class=\"o\">(<\/span><span class=\"n\">name<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"checkNumber\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">length<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">50<\/span><span class=\"o\">)<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">checkNumber<\/span><span class=\"o\">;<\/span>\n\n    <span class=\"c1\">\/\/ Constructors, equals(), hashCode(), Getters, and Setters<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u0633\u067e\u0633 \u060c \u0627\u0635\u0644\u0627\u062d \u06a9\u0646\u06cc\u062f <code>Payment<\/code> \u0645\u0648\u062c\u0648\u062f\u06cc\u062a:\n<\/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\">\"payments\"<\/span><span class=\"o\">)<\/span>\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Payment<\/span> <span class=\"o\">{<\/span>\n    <span class=\"nd\">@EmbeddedId<\/span>\n    <span class=\"kd\">private<\/span> <span class=\"nc\">PaymentId<\/span> <span class=\"n\">id<\/span><span class=\"o\">;<\/span>\n<span class=\"o\">}<\/span>\n<\/code><\/pre>\n<\/div>\n<ul>\n<li>\n<strong>\u062a\u0641\u0627\u0648\u062a \u06a9\u0644\u06cc\u062f\u06cc<\/strong>: <code>@EmbeddedId<\/code> \u0628\u0627 \u06a9\u0644\u06cc\u062f \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u0631\u0641\u062a\u0627\u0631 \u0645\u06cc \u06a9\u0646\u062f <strong>\u0627\u0639\u062a\u0631\u0627\u0636<\/strong> \u0628\u0647 \u062c\u0627\u06cc \u0632\u0645\u06cc\u0646\u0647 \u0647\u0627\u06cc \u062c\u062f\u0627\u06af\u0627\u0646\u0647 \u062f\u0631 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%D8%A7%D9%81%DA%A9%D8%A7%D8%B1_%D9%86%D9%87%D8%A7%DB%8C%DB%8C\"><\/span>\n<p>  <strong>\u0627\u0641\u06a9\u0627\u0631 \u0646\u0647\u0627\u06cc\u06cc<\/strong><br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\u0647\u0645\u06cc\u0634\u0647 <strong>\u0646\u0627\u062f\u06cc\u062f\u0647 \u06af\u0631\u0641\u062a\u0646 <code>equals()<\/code> \u0648\u062a <code>hashCode()<\/code><\/strong>  \u0628\u0631\u0627\u06cc \u0627\u0637\u0645\u06cc\u0646\u0627\u0646 \u0627\u0632 \u0627\u06cc\u0646\u06a9\u0647 \u0645\u0642\u0627\u06cc\u0633\u0647 \u0647\u0627\u06cc \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u0628\u0647 \u062f\u0631\u0633\u062a\u06cc \u06a9\u0627\u0631 \u0645\u06cc \u06a9\u0646\u0646\u062f.<\/li>\n<li>\u062f\u0631 \u0646\u0638\u0631 \u06af\u0631\u0641\u062a\u0646 <code>@EmbeddedId<\/code> \u0627\u06af\u0631 \u062a\u0631\u062c\u06cc\u062d \u0645\u06cc \u062f\u0647\u06cc\u062f \u0628\u0647 \u062c\u0627\u06cc \u0632\u0645\u06cc\u0646\u0647 \u0647\u0627\u06cc \u062c\u062f\u0627\u06af\u0627\u0646\u0647 \u062f\u0631 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a \u060c \u06a9\u0644\u06cc\u062f \u06a9\u0627\u0645\u067e\u0648\u0632\u06cc\u062a \u0631\u0627 \u0628\u0647 \u0639\u0646\u0648\u0627\u0646 \u06cc\u06a9 \u0634\u06cc\u0621 \u062f\u0631\u0645\u0627\u0646 \u06a9\u0646\u06cc\u062f.<\/li>\n<\/ul>\n<p>\u0627\u06cc\u0646 \u0634\u0645\u0627 \u0631\u0627 \u062a\u0636\u0645\u06cc\u0646 \u0645\u06cc \u06a9\u0646\u062f <code>Payment<\/code> \u062a\u0648\u0627\u0628\u0639 \u0645\u0648\u062c\u0648\u062f\u06cc\u062a <strong>\u062f\u0631\u0633\u062a<\/strong> \u062f\u0631 <strong>\u0628\u0648\u062a \u0628\u0647\u0627\u0631 + \u062e\u0648\u0627\u0628 \u0632\u0645\u0633\u062a\u0627\u0646\u06cc<\/strong> \u0645\u062d\u06cc\u0637 \ud83d\ude80<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PaymentId \u06a9\u0644\u0627\u0633 (\u0628\u0647\u062a\u0631\u06cc\u0646 \u0634\u06cc\u0648\u0647 \u0647\u0627) import java.io.Serializable; import java.util.Objects; public class PaymentId implements Serializable { private Integer customer; \/\/ Must match the type of Payment.customer (Customer&#8217;s ID) private String checkNumber; \/\/ Default constructor (required by JPA) public PaymentId() {} \/\/ Parameterized constructor for convenience public PaymentId(Integer customer, String checkNumber) { this.customer = customer; this.checkNumber = &hellip;<\/p>\n","protected":false},"author":2,"featured_media":96413,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/media2.dev.to\/dynamic\/image\/width=1000,height=500,fit=cover,gravity=auto,format=auto\/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fh2qscomwqtfag64tp75r.png","fifu_image_alt":"","footnotes":""},"categories":[339],"tags":[],"class_list":["post-96412","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\/96412","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=96412"}],"version-history":[{"count":0,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/96412\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media\/96413"}],"wp:attachment":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media?parent=96412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/categories?post=96412"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/tags?post=96412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}