{"id":97098,"date":"2024-10-20T14:59:15","date_gmt":"2024-10-20T06:59:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/97098\/"},"modified":"2024-10-20T14:59:16","modified_gmt":"2024-10-20T06:59:16","slug":"p%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%9d%e6%8e%a2%ef%bc%9a%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e5%88%9d%e5%a7%8b%e5%8a%a0%e8%bc%89%ef%bc%9f-jsp%e5%88%9d%e5%a7%8b%e5%8a%a0%e8%bc%89%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/97098\/","title":{"rendered":"P\u6578\u64da\u5eab\u521d\u63a2\uff1a\u5982\u4f55\u5be6\u73fe\u521d\u59cb\u52a0\u8f09\uff1f (jsp\u521d\u59cb\u52a0\u8f09\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"p%e6%95%b8%e6%93%9a%e5%ba%ab%e5%88%9d%e6%8e%a2%ef%bc%9a%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e5%88%9d%e5%a7%8b%e5%8a%a0%e8%bc%89%ef%bc%9f-jsp%e5%88%9d%e5%a7%8b%e5%8a%a0%e8%bc%89%e6%95%b8%e6%93%9a-oSHEdMEuel\">P\u6578\u64da\u5eab\u521d\u63a2\uff1a\u5982\u4f55\u5be6\u73fe\u521d\u59cb\u52a0\u8f09\uff1f 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id=\"2-%e7%b7%a8%e5%af%ab%e6%95%b8%e6%93%9a%e5%8a%a0%e8%bc%89%e4%bb%a3%e7%a2%bc-oSHEdMEuel\">2. \u7de8\u5beb\u6578\u64da\u52a0\u8f09\u4ee3\u78bc<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u9700\u8981\u7de8\u5beb\u4ee3\u78bc\u4f86\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728JSP\u4e2d\u4f7f\u7528JDBC\u4f86\u5be6\u73fe\u521d\u59cb\u52a0\u8f09\uff1a<\/p>\n<pre><code>\nimport java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.ResultSet;\nimport java.sql.Statement;\nimport java.util.ArrayList;\nimport java.util.List;\n\npublic class DataLoader {\n    public List loadUsers() {\n        List users = new ArrayList();\n        try {\n            Connection connection = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost:3306\/mydb\", \"user\", \"password\");\n            Statement statement = connection.createStatement();\n            ResultSet resultSet = statement.executeQuery(\"SELECT * FROM users\");\n            while (resultSet.next()) {\n                User user = new User(resultSet.getInt(\"id\"), resultSet.getString(\"name\"));\n                users.add(user);\n            }\n            connection.close();\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n        return users;\n    }\n}\n<\/code><\/pre>\n<h3 id=\"3-%e5%9c%a8%e6%87%89%e7%94%a8%e5%95%9f%e5%8b%95%e6%99%82%e8%aa%bf%e7%94%a8%e5%8a%a0%e8%bc%89%e6%96%b9%e6%b3%95-oSHEdMEuel\">3. \u5728\u61c9\u7528\u555f\u52d5\u6642\u8abf\u7528\u52a0\u8f09\u65b9\u6cd5<\/h3>\n<p>\u6700\u5f8c\uff0c\u78ba\u4fdd\u5728\u61c9\u7528\u555f\u52d5\u6642\u8abf\u7528\u6578\u64da\u52a0\u8f09\u65b9\u6cd5\u3002\u9019\u53ef\u4ee5\u5728Servlet\u7684init\u65b9\u6cd5\u4e2d\u5be6\u73fe\uff1a<\/p>\n<pre><code>\nimport javax.servlet.ServletException;\nimport javax.servlet.http.HttpServlet;\n\npublic class MyServlet extends HttpServlet {\n    private DataLoader dataLoader;\n\n    @Override\n    public void init() throws ServletException {\n        dataLoader = new DataLoader();\n        List users = dataLoader.loadUsers();\n        \/\/ \u5c07\u7528\u6236\u6578\u64da\u5b58\u5132\u5728\u61c9\u7528\u7bc4\u570d\u5167\n        getServletContext().setAttribute(\"users\", users);\n    }\n}\n<\/code><\/pre>\n<h2 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id=\"%e7%b8%bd%e7%b5%90-oSHEdMEuel\">\u7e3d\u7d50<\/h2>\n<p>\u521d\u59cb\u52a0\u8f09\u662f\u63d0\u5347JSP\u61c9\u7528\u6027\u80fd\u7684\u91cd\u8981\u7b56\u7565\u3002\u901a\u904e\u5408\u7406\u8a2d\u8a08\u6578\u64da\u6a21\u578b\u3001\u7de8\u5beb\u6709\u6548\u7684\u6578\u64da\u52a0\u8f09\u4ee3\u78bc\u4ee5\u53ca\u5728\u61c9\u7528\u555f\u52d5\u6642\u9032\u884c\u52a0\u8f09\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u61c9\u7528\u7684\u97ff\u61c9\u901f\u5ea6\u548c\u7528\u6236\u9ad4\u9a57\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u5982 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u5c07\u6709\u52a9\u65bc\u9032\u4e00\u6b65\u63d0\u5347\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22P\u6578\u64da\u5eab\u7684\u521d\u59cb\u52a0\u8f09\u65b9\u6cd5\uff0c\u4e86\u89e3\u5982\u4f55\u5728JSP\u4e2d\u6709\u6548\u5be6\u73fe\u6578\u64da\u5eab\u7684\u521d\u59cb\u6578\u64da\u52a0\u8f09\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-97098","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97098","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=97098"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97098\/revisions"}],"predecessor-version":[{"id":97099,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/97098\/revisions\/97099"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=97098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=97098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=97098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}