Java数据库编程（执行数据库查询操作）

package org.dml;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.Statement;

public class ResultSetDemo01 {

public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";

public static final String url = "jdbc:mysql://localhost:3306/mldn";

public static final String user = "root";

public static final String password = "root";

public static void main(String[] args) throws Exception{

Connection conn = null;

Statement stmt = null;

ResultSet rs = null;

String sql = "select id,name,password,age,sex from user";

Class.forName(DBDRIVER);

conn = DriverManager.getConnection(url,user,password);

stmt = conn.createStatement();

rs = stmt.executeQuery(sql);

while(rs.next()){

int id = rs.getInt("id");

String name = rs.getString("name");

String password = rs.getString("password");

int age = rs.getInt("age");

String sex = rs.getString("sex");

System.out.print("编号："+id+"；");

System.out.print("姓名："+name+"；");

System.out.print("密码："+password+"；");

System.out.print("年龄："+age+"；");

System.out.println("性别："+sex+"；");

System.out.println("------------------");

}

rs.close();

stmt.close();

conn.close();

}

}