{"id":185216,"date":"2024-11-10T19:42:22","date_gmt":"2024-11-10T11:42:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185216\/"},"modified":"2024-11-10T19:42:23","modified_gmt":"2024-11-10T11:42:23","slug":"%e4%bd%bf%e7%94%a8servlet%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%aa%a2%e7%b4%a2%e6%95%b8%e6%93%9a%e4%b8%a6%e5%ad%98%e5%84%b2%e5%88%b0%e8%ae%8a%e9%87%8f%e4%b8%ad%ef%bc%88servlet%e5%b0%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185216\/","title":{"rendered":"\u4f7f\u7528servlet\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u4e26\u5b58\u5132\u5230\u8b8a\u91cf\u4e2d\uff08servlet\u5c07\u6578\u64da\u5eab\u53d6\u51fa\u653e\u5165\u8b8a\u91cf\uff09"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8servlet%e5%be%9e%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%aa%a2%e7%b4%a2%e6%95%b8%e6%93%9a%e4%b8%a6%e5%ad%98%e5%84%b2%e5%88%b0%e8%ae%8a%e9%87%8f%e4%b8%ad-FyCSmNDunp\">\u4f7f\u7528Servlet\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u4e26\u5b58\u5132\u5230\u8b8a\u91cf\u4e2d<\/h1>\n<p>\u5728Java EE\u74b0\u5883\u4e2d\uff0cServlet\u662f\u4e00\u7a2e\u7528\u65bc\u64f4\u5c55\u4f3a\u670d\u5668\u529f\u80fd\u7684\u6280\u8853\uff0c\u7279\u5225\u662f\u5728Web\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7576\u9700\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u4e26\u5c07\u5176\u5b58\u5132\u5230\u8b8a\u91cf\u4e2d\u6642\uff0cServlet\u63d0\u4f9b\u4e86\u4e00\u500b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Servlet\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\uff0c\u4e26\u5c07\u5176\u5b58\u5132\u5230\u8b8a\u91cf\u4e2d\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%92%b0%e5%a2%83%e8%a8%ad%e7%bd%ae-FyCSmNDunp\">\u74b0\u5883\u8a2d\u7f6e<\/h2>\n<p>\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u78ba\u4fdd\u5df2\u7d93\u8a2d\u7f6e\u597d\u4ee5\u4e0b\u74b0\u5883\uff1a<\/p>\n<ul>\n<li>Java Development Kit (JDK)<\/li>\n<li>Apache Tomcat\u6216\u5176\u4ed6Servlet\u5bb9\u5668<\/li>\n<li>MySQL\u6216\u5176\u4ed6\u95dc\u4fc2\u578b\u6578\u64da\u5eab<\/li>\n<li>JDBC\u9a45\u52d5\u7a0b\u5e8f<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-FyCSmNDunp\">\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u9019\u53ef\u4ee5\u901a\u904eJDBC\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u9023\u63a5\u5230MySQL\u6578\u64da\u5eab\u7684\u793a\u4f8b\u4ee3\u78bc\uff1a<\/p>\n<pre><code>\nimport java.sql.Connection;\nimport java.sql.DriverManager;\nimport java.sql.SQLException;\n\npublic class DatabaseConnection {\n    public static Connection getConnection() {\n        Connection connection = null;\n        try {\n            Class.forName(\"com.mysql.cj.jdbc.Driver\");\n            connection = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost:3306\/your_database\", \"username\", \"password\");\n        } catch (ClassNotFoundException | SQLException e) {\n            e.printStackTrace();\n        }\n        return connection;\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8servlet%e6%aa%a2%e7%b4%a2%e6%95%b8%e6%93%9a-FyCSmNDunp\">\u4f7f\u7528Servlet\u6aa2\u7d22\u6578\u64da<\/h2>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u5c07\u5275\u5efa\u4e00\u500bServlet\u4f86\u6aa2\u7d22\u6578\u64da\u4e26\u5c07\u5176\u5b58\u5132\u5230\u8b8a\u91cf\u4e2d\u3002\u4ee5\u4e0b\u662fServlet\u7684\u57fa\u672c\u7d50\u69cb\uff1a<\/p>\n<pre><code>\nimport java.io.IOException;\nimport java.io.PrintWriter;\nimport java.sql.Connection;\nimport java.sql.ResultSet;\nimport java.sql.Statement;\nimport javax.servlet.ServletException;\nimport javax.servlet.annotation.WebServlet;\nimport javax.servlet.http.HttpServlet;\nimport javax.servlet.http.HttpServletRequest;\nimport javax.servlet.http.HttpServletResponse;\n\n@WebServlet(\"\/retrieveData\")\npublic class DataRetrievalServlet extends HttpServlet {\n    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {\n        response.setContentType(\"text\/html\");\n        PrintWriter out = response.getWriter();\n        \n        Connection connection = DatabaseConnection.getConnection();\n        String query = \"SELECT * FROM your_table\";\n        \n        try {\n            Statement statement = connection.createStatement();\n            ResultSet resultSet = statement.executeQuery(query);\n            \n            while (resultSet.next()) {\n                String data = resultSet.getString(\"column_name\");\n                out.println(\"Retrieved Data: \" + data + \"<br>\");\n            }\n        } catch (Exception e) {\n            e.printStackTrace();\n        } finally {\n            try {\n                if (connection != null) {\n                    connection.close();\n                }\n            } catch (SQLException e) {\n                e.printStackTrace();\n            }\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e4%bb%a3%e7%a2%bc%e8%a7%a3%e9%87%8b-FyCSmNDunp\">\u4ee3\u78bc\u89e3\u91cb<\/h2>\n<p>\u5728\u4e0a\u8ff0\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u8a2d\u7f6e\u4e86Servlet\u7684\u8def\u5f91\u70ba\u201c\/retrieveData\u201d\u3002\u5728doGet\u65b9\u6cd5\u4e2d\uff0c\u6211\u5011\u8a2d\u7f6e\u4e86\u97ff\u61c9\u7684\u5167\u5bb9\u985e\u578b\u70baHTML\uff0c\u7136\u5f8c\u5275\u5efa\u4e86\u4e00\u500bPrintWriter\u5c0d\u8c61\u4f86\u8f38\u51fa\u6578\u64da\u3002<\/p>\n<p>\u63a5\u8457\uff0c\u6211\u5011\u901a\u904eDatabaseConnection\u985e\u7372\u53d6\u6578\u64da\u5eab\u9023\u63a5\uff0c\u4e26\u57f7\u884c\u4e00\u500bSQL\u67e5\u8a62\u4f86\u6aa2\u7d22\u6578\u64da\u3002\u4f7f\u7528ResultSet\u5c0d\u8c61\uff0c\u6211\u5011\u53ef\u4ee5\u9010\u884c\u8b80\u53d6\u6578\u64da\u4e26\u5c07\u5176\u5b58\u5132\u5230\u8b8a\u91cf\u4e2d\u3002\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5c07\u6bcf\u4e00\u884c\u7684\u6578\u64da\u8f38\u51fa\u5230\u7db2\u9801\u4e0a\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FyCSmNDunp\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528Servlet\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u4e26\u5b58\u5132\u5230\u8b8a\u91cf\u4e2d\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\u3002\u901a\u904e\u6b63\u78ba\u8a2d\u7f6e\u6578\u64da\u5eab\u9023\u63a5\u548c\u7de8\u5beb\u76f8\u61c9\u7684Servlet\u4ee3\u78bc\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5730\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u3002\u9019\u7a2e\u6280\u8853\u5728Web\u61c9\u7528\u7a0b\u5e8f\u4e2d\u975e\u5e38\u5e38\u898b\uff0c\u80fd\u5920\u6709\u6548\u5730\u8655\u7406\u7528\u6236\u8acb\u6c42\u4e26\u8fd4\u56de\u6240\u9700\u7684\u6578\u64da\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\u4f86\u90e8\u7f72\u60a8\u7684Java\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528Servlet\u5f9e\u6578\u64da\u5eab\u6aa2\u7d22\u6578\u64da\u4e26\u5c07\u5176\u5b58\u5132\u5230\u8b8a\u91cf\u4e2d\uff0c\u5be6\u73fe\u52d5\u614b\u6578\u64da\u8655\u7406\u548c\u7db2\u9801\u61c9\u7528\u7684\u9ad8\u6548\u6578\u64da\u4ea4\u4e92\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-185216","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185216","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=185216"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185216\/revisions"}],"predecessor-version":[{"id":185217,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185216\/revisions\/185217"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}