mysql连接测试程序

<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>

<%
//连接数据库
try
  {
  Class.forName("org.gjt.mm.mysql.Driver").newInstance();
  Connection connection= java.sql.DriverManager.getConnection("jdbc:mysql://localhost/dangyuan","root","789+");
  Statement statement = connection.createStatement();
  String sql="SELECT * FROM admin";
  ResultSet rs = statement.executeQuery(sql);
  ResultSetMetaData rmeta = rs.getMetaData();
  int numClumns=rmeta.getColumnCount();
  while(rs.next())
  {
  %>
          <tr bgcolor="#CCCCCC">
            <td><div align="center"><%=rs.getString(1)%></div></td>
            <td><div align="center"><%=rs.getString(2)%></div></td>
            <td><div align="center">
            <form id="<%="form" + rs.getString(1)%>" method="post" action="del.jsp"  >
              <input type="hidden" name="id" id="id"  value="<%=rs.getString(1)%>"/>
              <input type="submit" name="删除" id="删除" value="删除" />
              </form>
            </div></td>
          </tr>
    <%
  }
  %>
<p>
          <%
  out.println("<br>");
  out.println("数据库操作成功，恭喜你!");
  rs.close();
  statement.close();
  connection.close();
  }
  catch(Exception e)
  {
   e.printStackTrace();
   out.println("数据库链接失败！");
  }
%>