{"id":62161,"date":"2024-10-13T16:41:16","date_gmt":"2024-10-13T08:41:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/62161\/"},"modified":"2024-10-13T16:41:16","modified_gmt":"2024-10-13T08:41:16","slug":"jpa%e8%87%aa%e5%8b%95%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-jpa%e6%9c%83%e8%87%aa%e5%8b%95%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e5%97%8e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/62161\/","title":{"rendered":"JPA\u81ea\u52d5\u5275\u5efa\u6578\u64da\u5eab\uff1f (jpa\u6703\u81ea\u52d5\u5275\u5efa\u6578\u64da\u5eab\u55ce)"},"content":{"rendered":"<h1 id=\"jpa%e8%87%aa%e5%8b%95%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-jpa%e6%9c%83%e8%87%aa%e5%8b%95%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e5%97%8e-BTqyCQerZV\">JPA\u81ea\u52d5\u5275\u5efa\u6578\u64da\u5eab\uff1f (jpa\u6703\u81ea\u52d5\u5275\u5efa\u6578\u64da\u5eab\u55ce)<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0cJava\u6301\u4e45\u5316API\uff08Java Persistence API\uff0c\u7c21\u7a31JPA\uff09\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u6280\u8853\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u6578\u64da\u5eab\u64cd\u4f5c\u6642\u3002\u8a31\u591a\u958b\u767c\u8005\u5728\u4f7f\u7528JPA\u6642\u6703\u554f\u5230\u4e00\u500b\u554f\u984c\uff1aJPA\u662f\u5426\u80fd\u81ea\u52d5\u5275\u5efa\u6578\u64da\u5eab\uff1f\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u554f\u984c\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u6280\u8853\u7d30\u7bc0\u548c\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afjpa%ef%bc%9f-BTqyCQerZV\">\u4ec0\u9ebc\u662fJPA\uff1f<\/h2>\n<p>JPA\u662f\u4e00\u500bJava\u898f\u7bc4\uff0c\u65e8\u5728\u7c21\u5316Java\u61c9\u7528\u7a0b\u5e8f\u4e2d\u7684\u6578\u64da\u6301\u4e45\u5316\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u500b\u5c0d\u8c61\u95dc\u4fc2\u6620\u5c04\uff08ORM\uff09\u6846\u67b6\uff0c\u4f7f\u958b\u767c\u8005\u80fd\u5920\u4f7f\u7528Java\u5c0d\u8c61\u4f86\u64cd\u4f5c\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002JPA\u7684\u4e3b\u8981\u512a\u52e2\u5728\u65bc\u5b83\u80fd\u5920\u6e1b\u5c11\u958b\u767c\u8005\u8207\u6578\u64da\u5eab\u4e4b\u9593\u7684\u4ea4\u4e92\u8907\u96dc\u6027\uff0c\u4e26\u63d0\u9ad8\u958b\u767c\u6548\u7387\u3002<\/p>\n<h2 id=\"jpa%e7%9a%84%e8%87%aa%e5%8b%95%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8a%9f%e8%83%bd-BTqyCQerZV\">JPA\u7684\u81ea\u52d5\u5275\u5efa\u6578\u64da\u5eab\u529f\u80fd<\/h2>\n<p>JPA\u672c\u8eab\u4e26\u4e0d\u76f4\u63a5\u5275\u5efa\u6578\u64da\u5eab\uff0c\u4f46\u5b83\u53ef\u4ee5\u6839\u64da\u914d\u7f6e\u81ea\u52d5\u751f\u6210\u6578\u64da\u8868\u3002\u9019\u4e00\u529f\u80fd\u901a\u5e38\u4f9d\u8cf4\u65bcJPA\u7684\u5be6\u73fe\uff0c\u5982Hibernate\u3001EclipseLink\u7b49\u3002\u9019\u4e9b\u5be6\u73fe\u63d0\u4f9b\u4e86\u591a\u7a2e\u914d\u7f6e\u9078\u9805\uff0c\u5141\u8a31\u958b\u767c\u8005\u5728\u61c9\u7528\u555f\u52d5\u6642\u81ea\u52d5\u751f\u6210\u6578\u64da\u8868\u3002<\/p>\n<h3 id=\"%e5%a6%82%e4%bd%95%e9%85%8d%e7%bd%aejpa%e8%87%aa%e5%8b%95%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e8%a1%a8-BTqyCQerZV\">\u5982\u4f55\u914d\u7f6eJPA\u81ea\u52d5\u5275\u5efa\u6578\u64da\u8868<\/h3>\n<p>\u8981\u555f\u7528JPA\u81ea\u52d5\u5275\u5efa\u6578\u64da\u8868\u7684\u529f\u80fd\uff0c\u958b\u767c\u8005\u9700\u8981\u5728\u61c9\u7528\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u8a2d\u7f6e\u76f8\u61c9\u7684\u5c6c\u6027\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528Hibernate\u4f5c\u70baJPA\u5be6\u73fe\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>spring.jpa.hibernate.ddl-auto=create<\/code><\/pre>\n<p>\u5728\u9019\u500b\u914d\u7f6e\u4e2d\uff0c`ddl-auto`\u5c6c\u6027\u53ef\u4ee5\u8a2d\u7f6e\u70ba\u4ee5\u4e0b\u5e7e\u500b\u503c\uff1a<\/p>\n<ul>\n<li><strong>create<\/strong>\uff1a\u6bcf\u6b21\u555f\u52d5\u61c9\u7528\u6642\u90fd\u6703\u5275\u5efa\u6578\u64da\u8868\uff0c\u4e26\u522a\u9664\u4e4b\u524d\u7684\u6578\u64da\u3002<\/li>\n<li><strong>update<\/strong>\uff1a\u6bcf\u6b21\u555f\u52d5\u61c9\u7528\u6642\u6703\u6839\u64da\u5be6\u9ad4\u985e\u7684\u8b8a\u5316\u66f4\u65b0\u6578\u64da\u8868\u3002<\/li>\n<li><strong>validate<\/strong>\uff1a\u555f\u52d5\u6642\u6aa2\u67e5\u6578\u64da\u8868\u662f\u5426\u8207\u5be6\u9ad4\u985e\u5339\u914d\uff0c\u4e0d\u6703\u9032\u884c\u4efb\u4f55\u66f4\u6539\u3002<\/li>\n<li><strong>none<\/strong>\uff1a\u4e0d\u9032\u884c\u4efb\u4f55DDL\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-BTqyCQerZV\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684JPA\u5be6\u9ad4\u985e\u793a\u4f8b\uff1a<\/p>\n<pre><code>import javax.persistence.Entity;\nimport javax.persistence.GeneratedValue;\nimport javax.persistence.GenerationType;\nimport javax.persistence.Id;\n\n@Entity\npublic class User {\n    @Id\n    @GeneratedValue(strategy = GenerationType.IDENTITY)\n    private Long id;\n    private String name;\n    private String email;\n\n    \/\/ Getters and Setters\n}\n<\/code><\/pre>\n<p>\u7576\u61c9\u7528\u555f\u52d5\u6642\uff0c\u5982\u679c\u914d\u7f6e\u4e86`ddl-auto=create`\uff0cJPA\u5c07\u81ea\u52d5\u6839\u64da`User`\u985e\u5275\u5efa\u4e00\u500b\u540d\u70ba`user`\u7684\u6578\u64da\u8868\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-BTqyCQerZV\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136\u81ea\u52d5\u5275\u5efa\u6578\u64da\u8868\u7684\u529f\u80fd\u975e\u5e38\u65b9\u4fbf\uff0c\u4f46\u5728\u751f\u7522\u74b0\u5883\u4e2d\u4f7f\u7528\u6642\u9700\u8981\u8b39\u614e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u9700\u8981\u8003\u616e\u7684\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u4e1f\u5931\uff1a\u4f7f\u7528`create`\u9078\u9805\u6703\u5c0e\u81f4\u6578\u64da\u4e1f\u5931\uff0c\u56e0\u70ba\u6bcf\u6b21\u555f\u52d5\u61c9\u7528\u6642\u90fd\u6703\u522a\u9664\u820a\u7684\u6578\u64da\u8868\u3002<\/li>\n<li>\u6027\u80fd\u5f71\u97ff\uff1a\u5728\u5927\u578b\u61c9\u7528\u4e2d\uff0c\u81ea\u52d5\u751f\u6210\u6578\u64da\u8868\u53ef\u80fd\u6703\u5f71\u97ff\u555f\u52d5\u6027\u80fd\u3002<\/li>\n<li>\u7248\u672c\u63a7\u5236\uff1a\u5728\u751f\u7522\u74b0\u5883\u4e2d\uff0c\u5efa\u8b70\u4f7f\u7528\u6578\u64da\u5eab\u9077\u79fb\u5de5\u5177\u4f86\u7ba1\u7406\u6578\u64da\u5eab\u7d50\u69cb\u7684\u8b8a\u66f4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-BTqyCQerZV\">\u7e3d\u7d50<\/h2>\n<p>JPA\u78ba\u5be6\u53ef\u4ee5\u901a\u904e\u5176\u5be6\u73fe\uff08\u5982Hibernate\uff09\u81ea\u52d5\u5275\u5efa\u6578\u64da\u8868\uff0c\u4f46\u9019\u4e00\u529f\u80fd\u9700\u8981\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9032\u884c\u914d\u7f6e\u3002\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u5408\u7406\u5229\u7528\u9019\u4e00\u529f\u80fd\u53ef\u4ee5\u63d0\u9ad8\u6548\u7387\uff0c\u4f46\u5728\u751f\u7522\u74b0\u5883\u4e2d\u5247\u9700\u8b39\u614e\u4f7f\u7528\uff0c\u4ee5\u907f\u514d\u6578\u64da\u4e1f\u5931\u548c\u6027\u80fd\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u4f86\u90e8\u7f72\u61c9\u7528\u7a0b\u5e8f\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3JPA\u5982\u4f55\u81ea\u52d5\u5275\u5efa\u6578\u64da\u5eab\uff0c\u63a2\u7d22\u5176\u914d\u7f6e\u9078\u9805\u53ca\u512a\u52e2\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u7d50\u69cb\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-62161","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=62161"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62161\/revisions"}],"predecessor-version":[{"id":62162,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62161\/revisions\/62162"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=62161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=62161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=62161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}