java实现MySql连接七步

package org.cjit.io.student; /** * java实现MySQl的JDBC连接的七步 */ import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; public class JdbcTest { * @p

package org.cjit.io.student;
/**
 * java实现MySQl的JDBC连接的七步
 */

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class jdbctest {

 

  * @param args
  */
 private static  Connection con;
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  try {
   //1.载入JDBC驱动程序包
   Class.forName("com.mysql.jdbc.Driver");
   //2.定义连接URL
   String url = "jdbc:mysql://localhost:3306/test?user=root&password=root";
   //3.建立连接
   con = DriverManager.getConnection(url);
            //4.创建Statement对象
   Statement stmt = con.createStatement();
   //5.执行查询操作
   String query = "select*from person";
   ResultSet rs = stmt.executeQuery(query);
            //6.对查询结果进行处理
   while (rs.next()) {
    String name=rs.getString("姓名");
    String password=rs.getString("密码");
    System.out.println(rs.getString(2));
    System.out.println(name+":"+password);

   }

  } catch (ClassNotFoundException e) {// 由16行抛出
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (SQLException e) {// 由con,stmt抛出
   // TODO Auto-generated catch block
   e.printStackTrace();
  }finally{
   //7.关闭连接
   if(con!=null){
    try {
     con.close();
    } catch (SQLException e) {
     // TODO Auto-generated catch block
      System.exit(0);
    }
    
   }
  }

 }

}