{"id":61555,"date":"2024-10-13T11:57:16","date_gmt":"2024-10-13T03:57:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61555\/"},"modified":"2024-10-13T11:57:16","modified_gmt":"2024-10-13T03:57:16","slug":"hibernate-%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5%e7%82%ba%e7%a9%ba%e5%95%8f%e9%a1%8c%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-hibernate%e4%b8%ad%e7%9a%84%e4%bf%ae%e6%94%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61555\/","title":{"rendered":"Hibernate \u4fee\u6539\u6578\u64da\u5eab\u5b57\u6bb5\u70ba\u7a7a\u554f\u984c\u89e3\u6c7a\u65b9\u6848 (hibernate\u4e2d\u7684\u4fee\u6539\u6578\u64da\u5eab\u5b57\u6bb5\u70ba\u7a7a)"},"content":{"rendered":"<h1 id=\"hibernate-%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5%e7%82%ba%e7%a9%ba%e5%95%8f%e9%a1%8c%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-rbgdZRdufm\">Hibernate \u4fee\u6539\u6578\u64da\u5eab\u5b57\u6bb5\u70ba\u7a7a\u554f\u984c\u89e3\u6c7a\u65b9\u6848<\/h1>\n<p>\u5728\u4f7f\u7528Hibernate\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u958b\u767c\u8005\u7d93\u5e38\u6703\u9047\u5230\u4e00\u500b\u554f\u984c\uff1a\u5982\u4f55\u6b63\u78ba\u5730\u5c07\u6578\u64da\u5eab\u4e2d\u7684\u5b57\u6bb5\u8a2d\u7f6e\u70ba\u7a7a\u3002\u9019\u500b\u554f\u984c\u770b\u4f3c\u7c21\u55ae\uff0c\u4f46\u5728\u5be6\u969b\u64cd\u4f5c\u4e2d\u537b\u53ef\u80fd\u5f15\u767c\u4e00\u7cfb\u5217\u7684\u932f\u8aa4\u548c\u56f0\u60d1\u3002\u672c\u6587\u5c07\u63a2\u8a0eHibernate\u4e2d\u4fee\u6539\u6578\u64da\u5eab\u5b57\u6bb5\u70ba\u7a7a\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u5efa\u8b70\u3002<\/p>\n<h2 id=\"hibernate%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-rbgdZRdufm\">Hibernate\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>Hibernate\u662f\u4e00\u500b\u6d41\u884c\u7684Java\u6301\u4e45\u5316\u6846\u67b6\uff0c\u65e8\u5728\u7c21\u5316\u6578\u64da\u5eab\u64cd\u4f5c\u3002\u5b83\u901a\u904e\u5c07Java\u5c0d\u8c61\u6620\u5c04\u5230\u6578\u64da\u5eab\u8868\uff0c\u8b93\u958b\u767c\u8005\u80fd\u5920\u4ee5\u9762\u5411\u5c0d\u8c61\u7684\u65b9\u5f0f\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002\u7136\u800c\uff0c\u7576\u6d89\u53ca\u5230\u5c07\u5b57\u6bb5\u8a2d\u7f6e\u70ba\u7a7a\u6642\uff0cHibernate\u7684\u884c\u70ba\u53ef\u80fd\u6703\u8207\u9810\u671f\u4e0d\u7b26\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e6%9c%83%e5%87%ba%e7%8f%be%e5%ad%97%e6%ae%b5%e7%82%ba%e7%a9%ba%e7%9a%84%e5%95%8f%e9%a1%8c-rbgdZRdufm\">\u70ba\u4ec0\u9ebc\u6703\u51fa\u73fe\u5b57\u6bb5\u70ba\u7a7a\u7684\u554f\u984c<\/h2>\n<p>\u5728Hibernate\u4e2d\uff0c\u5c07\u5b57\u6bb5\u8a2d\u7f6e\u70ba\u7a7a\u53ef\u80fd\u6703\u53d7\u5230\u591a\u7a2e\u56e0\u7d20\u7684\u5f71\u97ff\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u5982\u679c\u6578\u64da\u5eab\u4e2d\u7684\u5b57\u6bb5\u985e\u578b\u4e0d\u5141\u8a31\u7a7a\u503c\uff08\u5982\u6574\u6578\u985e\u578b\uff09\uff0c\u5247Hibernate\u5728\u5617\u8a66\u5c07\u5176\u8a2d\u7f6e\u70ba\u7a7a\u6642\u6703\u5f15\u767c\u7570\u5e38\u3002<\/li>\n<li><strong>\u6620\u5c04\u914d\u7f6e\u932f\u8aa4\uff1a<\/strong>Hibernate\u7684\u6620\u5c04\u6587\u4ef6\u6216\u8a3b\u89e3\u914d\u7f6e\u4e0d\u6b63\u78ba\uff0c\u53ef\u80fd\u5c0e\u81f4Hibernate\u7121\u6cd5\u6b63\u78ba\u8b58\u5225\u54ea\u4e9b\u5b57\u6bb5\u53ef\u4ee5\u70ba\u7a7a\u3002<\/li>\n<li><strong>\u4e8b\u52d9\u7ba1\u7406\u554f\u984c\uff1a<\/strong>\u5728\u4e8b\u52d9\u672a\u6b63\u78ba\u63d0\u4ea4\u7684\u60c5\u6cc1\u4e0b\uff0c\u5c0d\u6578\u64da\u7684\u4fee\u6539\u53ef\u80fd\u7121\u6cd5\u751f\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88-rbgdZRdufm\">\u89e3\u6c7a\u65b9\u6848<\/h2>\n<h3 id=\"1-%e7%a2%ba%e4%bf%9d%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e6%ae%b5%e5%85%81%e8%a8%b1%e7%a9%ba%e5%80%bc-rbgdZRdufm\">1. \u78ba\u4fdd\u6578\u64da\u5eab\u5b57\u6bb5\u5141\u8a31\u7a7a\u503c<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u6578\u64da\u5eab\u4e2d\u76f8\u61c9\u5b57\u6bb5\u7684\u5b9a\u7fa9\uff0c\u78ba\u4fdd\u5176\u5141\u8a31\u7a7a\u503c\u3002\u4f8b\u5982\uff0c\u5728MySQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u6aa2\u67e5\u5b57\u6bb5\u5c6c\u6027\uff1a<\/p>\n<pre><code>SHOW COLUMNS FROM your_table_name;<\/code><\/pre>\n<p>\u5982\u679c\u5b57\u6bb5\u7684`Null`\u5c6c\u6027\u986f\u793a\u70ba`NO`\uff0c\u5247\u9700\u8981\u4fee\u6539\u6578\u64da\u5eab\u7d50\u69cb\uff0c\u5141\u8a31\u8a72\u5b57\u6bb5\u70ba\u7a7a\uff1a<\/p>\n<pre><code>ALTER TABLE your_table_name MODIFY your_column_name VARCHAR(255) NULL;<\/code><\/pre>\n<h3 id=\"2-%e6%ad%a3%e7%a2%ba%e9%85%8d%e7%bd%aehibernate%e6%98%a0%e5%b0%84-rbgdZRdufm\">2. \u6b63\u78ba\u914d\u7f6eHibernate\u6620\u5c04<\/h3>\n<p>\u5728Hibernate\u7684\u6620\u5c04\u6587\u4ef6\u6216\u8a3b\u89e3\u4e2d\uff0c\u78ba\u4fdd\u5c0d\u61c9\u5b57\u6bb5\u7684\u914d\u7f6e\u6b63\u78ba\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u8a3b\u89e3\u6642\uff0c\u53ef\u4ee5\u9019\u6a23\u8a2d\u7f6e\uff1a<\/p>\n<pre><code>@Column(nullable = true)\nprivate String yourField;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u544a\u8a34Hibernate\u8a72\u5b57\u6bb5\u53ef\u4ee5\u70ba\u7a7a\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e9%81%a9%e7%95%b6%e7%9a%84%e4%ba%8b%e5%8b%99%e7%ae%a1%e7%90%86-rbgdZRdufm\">3. \u4f7f\u7528\u9069\u7576\u7684\u4e8b\u52d9\u7ba1\u7406<\/h3>\n<p>\u78ba\u4fdd\u5728\u9032\u884c\u6578\u64da\u4fee\u6539\u6642\uff0c\u4e8b\u52d9\u7ba1\u7406\u6b63\u78ba\u3002\u4f7f\u7528Spring\u6846\u67b6\u6642\uff0c\u53ef\u4ee5\u9019\u6a23\u914d\u7f6e\u4e8b\u52d9\uff1a<\/p>\n<pre><code>@Transactional\npublic void updateField(Long id, String newValue) {\n    YourEntity entity = session.get(YourEntity.class, id);\n    entity.setYourField(newValue);\n    session.update(entity);\n}<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u4e8b\u52d9\u7bc4\u570d\u5167\u9032\u884c\u6578\u64da\u4fee\u6539\uff0c\u907f\u514d\u56e0\u4e8b\u52d9\u672a\u63d0\u4ea4\u800c\u5c0e\u81f4\u7684\u554f\u984c\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-rbgdZRdufm\">\u793a\u4f8b\u4ee3\u78bc<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5b8c\u6574\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5c07\u5b57\u6bb5\u8a2d\u7f6e\u70ba\u7a7a\uff1a<\/p>\n<pre><code>public void clearField(Long id) {\n    Session session = sessionFactory.openSession();\n    Transaction transaction = null;\n    try {\n        transaction = session.beginTransaction();\n        YourEntity entity = session.get(YourEntity.class, id);\n        entity.setYourField(null); \/\/ \u5c07\u5b57\u6bb5\u8a2d\u7f6e\u70ba\u7a7a\n        session.update(entity);\n        transaction.commit();\n    } catch (Exception e) {\n        if (transaction != null) transaction.rollback();\n        e.printStackTrace();\n    } finally {\n        session.close();\n    }\n}<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-rbgdZRdufm\">\u7e3d\u7d50<\/h2>\n<p>\u5728Hibernate\u4e2d\u4fee\u6539\u6578\u64da\u5eab\u5b57\u6bb5\u70ba\u7a7a\u7684\u554f\u984c\u53ef\u4ee5\u901a\u904e\u78ba\u4fdd\u6578\u64da\u5eab\u5b57\u6bb5\u5141\u8a31\u7a7a\u503c\u3001\u6b63\u78ba\u914d\u7f6eHibernate\u6620\u5c04\u4ee5\u53ca\u4f7f\u7528\u9069\u7576\u7684\u4e8b\u52d9\u7ba1\u7406\u4f86\u89e3\u6c7a\u3002\u9019\u4e9b\u6b65\u9a5f\u4e0d\u50c5\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u907f\u514d\u5e38\u898b\u7684\u932f\u8aa4\uff0c\u9084\u80fd\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7aHibernate\u4e2d\u4fee\u6539\u6578\u64da\u5eab\u5b57\u6bb5\u70ba\u7a7a\u7684\u554f\u984c\uff0c\u63d0\u4f9b\u6709\u6548\u65b9\u6848\u8207\u6b65\u9a5f\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b8c\u6574\u6027\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-61555","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61555","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=61555"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61555\/revisions"}],"predecessor-version":[{"id":61556,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61555\/revisions\/61556"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61555"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61555"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}