Servlet中连接数据库并显示

将jar包复制到项目lib目录下
mysql-connector-java-5.1.6-bin下载地址：
http://115.com/file/dp521sz8

package testConn;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ShowConn extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        resp.setContentType("text/html");
        resp.setCharacterEncoding("Gb2312");
        PrintWriter out = resp.getWriter(); //输出流
        out.println("<table border=1>");    //打印出表格
        out.print("<tr><td>名字</td><td>主人</td><td>年龄</td><td>出生日期</td></tr>");
        try{
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost/test01?user=root&password=");
            //test01数据库
            stmt = conn.createStatement();
            rs = stmt.executeQuery("select * from pet;"); //查询语句
            while(rs.next()){  //每当有一条记录就输出一行
                out.print("<tr>");//从pet中获取value
                out.println("<td>"+ rs.getString("name") + "</td>");
                out.println("<td>"+ rs.getString("owner") + "</td>");
                out.println("<td>"+ rs.getString("age") + "</td>");
                out.println("<td>"+ rs.getString("birth") + "</td>");
                out.println("</tr>");
            }
            out.println("</table>");    
        }catch(ClassNotFoundException e) {
            e.printStackTrace();       
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                if(rs != null) {
                    rs.close();
                    rs = null;
                }
                if(stmt != null) {
                    stmt.close();
                    stmt = null;
                }
                if(conn != null){
                    conn.close();
                    conn = null;
                }
            
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }          
    }   
}