{"id":60235,"date":"2024-10-13T01:10:17","date_gmt":"2024-10-12T17:10:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60235\/"},"modified":"2024-10-13T01:10:17","modified_gmt":"2024-10-12T17:10:17","slug":"dao%e5%b1%a4%e5%af%a6%e7%8f%be%e9%ab%98%e6%95%88%e6%95%b8%e6%93%9a%e6%9b%b4%e6%96%b0%e6%93%8d%e4%bd%9c-dao%e5%b1%a4%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60235\/","title":{"rendered":"DAO\u5c64\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u66f4\u65b0\u64cd\u4f5c (dao\u5c64\u66f4\u65b0\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"dao%e5%b1%a4%e5%af%a6%e7%8f%be%e9%ab%98%e6%95%88%e6%95%b8%e6%93%9a%e6%9b%b4%e6%96%b0%e6%93%8d%e4%bd%9c-pQrFOkpsKh\">DAO\u5c64\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u66f4\u65b0\u64cd\u4f5c<\/h1>\n<p>\u5728\u73fe\u4ee3\u8edf\u9ad4\u958b\u767c\u4e2d\uff0c\u6578\u64da\u7684\u7ba1\u7406\u548c\u66f4\u65b0\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002DAO\uff08Data Access Object\uff09\u5c64\u4f5c\u70ba\u6578\u64da\u8a2a\u554f\u7684\u4e2d\u4ecb\uff0c\u8ca0\u8cac\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728DAO\u5c64\u4e2d\u5be6\u73fe\u9ad8\u6548\u7684\u6578\u64da\u66f4\u65b0\u64cd\u4f5c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afdao%e5%b1%a4%ef%bc%9f-pQrFOkpsKh\">\u4ec0\u9ebc\u662fDAO\u5c64\uff1f<\/h2>\n<p>DAO\u5c64\u662f\u4e00\u7a2e\u8a2d\u8a08\u6a21\u5f0f\uff0c\u65e8\u5728\u5c07\u6578\u64da\u8a2a\u554f\u908f\u8f2f\u8207\u696d\u52d9\u908f\u8f2f\u5206\u96e2\u3002\u9019\u7a2e\u5206\u96e2\u4f7f\u5f97\u4ee3\u78bc\u66f4\u5177\u53ef\u7dad\u8b77\u6027\u548c\u53ef\u6e2c\u8a66\u6027\u3002DAO\u5c64\u901a\u5e38\u5305\u542b\u5c0d\u6578\u64da\u5eab\u7684CRUD\uff08\u5275\u5efa\u3001\u8b80\u53d6\u3001\u66f4\u65b0\u3001\u522a\u9664\uff09\u64cd\u4f5c\u7684\u5c01\u88dd\uff0c\u4e26\u63d0\u4f9b\u7c21\u55ae\u7684\u63a5\u53e3\u4f9b\u4e0a\u5c64\u8abf\u7528\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e6%9b%b4%e6%96%b0%e7%9a%84%e6%8c%91%e6%88%b0-pQrFOkpsKh\">\u6578\u64da\u66f4\u65b0\u7684\u6311\u6230<\/h2>\n<p>\u5728\u9032\u884c\u6578\u64da\u66f4\u65b0\u6642\uff0c\u958b\u767c\u8005\u9762\u81e8\u591a\u7a2e\u6311\u6230\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u4e00\u81f4\u6027\uff1a\u78ba\u4fdd\u6578\u64da\u5728\u66f4\u65b0\u904e\u7a0b\u4e2d\u4e0d\u6703\u51fa\u73fe\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002<\/li>\n<li>\u6027\u80fd\uff1a\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e0b\uff0c\u5982\u4f55\u4fdd\u8b49\u6578\u64da\u66f4\u65b0\u7684\u6548\u7387\u3002<\/li>\n<li>\u932f\u8aa4\u8655\u7406\uff1a\u5982\u4f55\u6709\u6548\u5730\u8655\u7406\u66f4\u65b0\u904e\u7a0b\u4e2d\u7684\u7570\u5e38\u60c5\u6cc1\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%ab%98%e6%95%88%e6%95%b8%e6%93%9a%e6%9b%b4%e6%96%b0%e7%9a%84%e7%ad%96%e7%95%a5-pQrFOkpsKh\">\u9ad8\u6548\u6578\u64da\u66f4\u65b0\u7684\u7b56\u7565<\/h2>\n<h3 id=\"1-%e6%89%b9%e9%87%8f%e6%9b%b4%e6%96%b0-pQrFOkpsKh\">1. \u6279\u91cf\u66f4\u65b0<\/h3>\n<p>\u5728\u9700\u8981\u66f4\u65b0\u5927\u91cf\u6578\u64da\u6642\uff0c\u4f7f\u7528\u6279\u91cf\u66f4\u65b0\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528JDBC\u9032\u884c\u6279\u91cf\u66f4\u65b0\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nConnection conn = DriverManager.getConnection(url, user, password);\nconn.setAutoCommit(false);\nPreparedStatement pstmt = conn.prepareStatement(\"UPDATE users SET status = ? WHERE id = ?\");\n\nfor (User user : userList) {\n    pstmt.setString(1, user.getStatus());\n    pstmt.setInt(2, user.getId());\n    pstmt.addBatch();\n}\n\npstmt.executeBatch();\nconn.commit();\n<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e4%ba%8b%e5%8b%99-pQrFOkpsKh\">2. \u4f7f\u7528\u4e8b\u52d9<\/h3>\n<p>\u5728\u9032\u884c\u6578\u64da\u66f4\u65b0\u6642\uff0c\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528Spring\u6846\u67b6\u9032\u884c\u4e8b\u52d9\u7ba1\u7406\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\n@Transactional\npublic void updateUserStatus(List users) {\n    for (User user : users) {\n        userDao.updateStatus(user.getId(), user.getStatus());\n    }\n}\n<\/code><\/pre>\n<h3 id=\"3-%e9%81%bf%e5%85%8d%e4%b8%8d%e5%bf%85%e8%a6%81%e7%9a%84%e6%9b%b4%e6%96%b0-pQrFOkpsKh\">3. \u907f\u514d\u4e0d\u5fc5\u8981\u7684\u66f4\u65b0<\/h3>\n<p>\u5728\u66f4\u65b0\u6578\u64da\u4e4b\u524d\uff0c\u61c9\u5148\u6aa2\u67e5\u6578\u64da\u662f\u5426\u771f\u7684\u9700\u8981\u66f4\u65b0\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u63d0\u9ad8\u6027\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\npublic void updateUser(User user) {\n    User existingUser = userDao.findById(user.getId());\n    if (!existingUser.getStatus().equals(user.getStatus())) {\n        userDao.updateStatus(user.getId(), user.getStatus());\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-pQrFOkpsKh\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li>\u4f7f\u7528ORM\u6846\u67b6\uff08\u5982Hibernate\uff09\u4f86\u7c21\u5316\u6578\u64da\u8a2a\u554f\u548c\u66f4\u65b0\u64cd\u4f5c\u3002<\/li>\n<li>\u5b9a\u671f\u9032\u884c\u6578\u64da\u5eab\u6027\u80fd\u8abf\u512a\uff0c\u78ba\u4fdd\u67e5\u8a62\u548c\u66f4\u65b0\u64cd\u4f5c\u7684\u6548\u7387\u3002<\/li>\n<li>\u5be6\u65bd\u9069\u7576\u7684\u932f\u8aa4\u8655\u7406\u6a5f\u5236\uff0c\u78ba\u4fdd\u5728\u66f4\u65b0\u904e\u7a0b\u4e2d\u80fd\u5920\u6355\u7372\u548c\u8655\u7406\u7570\u5e38\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-pQrFOkpsKh\">\u7e3d\u7d50<\/h2>\n<p>\u5728DAO\u5c64\u5be6\u73fe\u9ad8\u6548\u7684\u6578\u64da\u66f4\u65b0\u64cd\u4f5c\u4e0d\u50c5\u80fd\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u53ef\u9760\u6027\u3002\u901a\u904e\u63a1\u7528\u6279\u91cf\u66f4\u65b0\u3001\u4f7f\u7528\u4e8b\u52d9\u4ee5\u53ca\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u66f4\u65b0\u7b49\u7b56\u7565\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u66f4\u65b0\u904e\u7a0b\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u8a2a\u554f\u6280\u8853\u548c\u67b6\u69cb\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u78ba\u4fdd\u5176\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DAO\u5c64\u5982\u4f55\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u66f4\u65b0\u64cd\u4f5c\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\u7ba1\u7406\u6548\u7387\uff0c\u78ba\u4fdd\u7cfb\u7d71\u7a69\u5b9a\u904b\u884c\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-60235","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60235","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=60235"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60235\/revisions"}],"predecessor-version":[{"id":60236,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60235\/revisions\/60236"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60235"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}