1.jsp <%@ page contentType="text/html;charset=gb2312" language="java" import="java.sql.*" %> <%ResultSet  rs;   Connection conn;   Statement Stmt;   String sql="";      String userName="DB_USERNAME";   String userPwd="DB_PASSWORD";   String serverName="DB_SERVER";   String DBName="DATABASE_NAME";      String driverName = "org.gjt.mm.mysql.Driver";   Class.forName(driverName).newInstance();  String url = "jdbc:mysql://" + serverName + "/" + DBName;  conn = DriverManager.getConnection(url, userName, userPwd);   Stmt = conn.createStatement();  sql = "select * from userinfo";   rs = Stmt.executeQuery(sql); %> <body>  <%while(rs.next()){%>  <p>   <%=rs.getString("username")%>   </p>   <%}%> <body> 这样也能连数据库,但是会让别人在源文件中看到自己的数据来源,不安全,不推荐使用。      
 
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