java连接mysql数据查询数据

时间:2023-03-08 17:16:00
package com.cn.peitest.connectDatabase;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement; public class Connect { public static void main(String[] args) {
// 声明Connection对象
Connection con;
// 驱动程序名
String driver = "com.mysql.jdbc.Driver";
// URL指向要访问的数据库名 test
String url = "jdbc:mysql://localhost:3306/peixian?serverTimezone=UTC";
// MySQL配置时的用户名
String user = "root";
// MySQL配置时的密码
String password = "123456";
// 遍历查询结果集
try {
// 加载驱动程序
Class.forName(driver);
// 1.getConnection()方法,连接MySQL数据库!!
con = DriverManager.getConnection(url, user, password);
if (!con.isClosed())
System.out.println("\n\t\t成功以 " + user + " 身份连接到数据库!!!"); // 2.创建statement类对象,用来执行SQL语句!!
Statement statement = con.createStatement();
// 要执行的SQL语句
String sql = "select * from pei_user_baseinf";
// 3.ResultSet类,用来存放获取的结果集!!
ResultSet rs = statement.executeQuery(sql);
System.out.println("\n\t\t执行结果如下所示:");
System.out.println("\t\t-----------------------------------------------------------------");
System.out.println("\t\t|\t" + "phone_no" + "\t" + "姓名" + "\t" + "性别" + "\t" + "年龄" + "\t" + "手机号码" + "\t\t" + "地址\t|");
System.out.println("\t\t-----------------------------------------------------------------"); String phone_no = null;
String Name = null;
String Sex = null;
//int Age = 0;
String Phone = null;
String Address = null; while (rs.next()) {
// 获取 ID 这列数据
//phone_no = rs.getInt("phone_no");
phone_no = rs.getString("phone_no");
// 获取 Name 这列数据
Name = rs.getString("pass_word");
// 获取 Sex 这列数据
Sex = rs.getString("sex");
// 获取 Age 这列数据
//Age = rs.getInt("Age");
// 获取 Phone 这列数据
Phone = rs.getString("user_name");
// 获取 Address 这列数据
Address = rs.getString("company_name");
// 输出结果
System.out.println("\t\t|\t" + phone_no + "\t" + Name + "\t" + Sex + "\t" + Phone + "\t" + Address + "\t|\t\t");
}
System.out.println("\t\t-----------------------------------------------------------------");
rs.close();
con.close();
}
catch (ClassNotFoundException e) {
// 数据库驱动类异常处理
System.out.println("Sorry,can`t find the Driver!");
e.printStackTrace();
}
catch (SQLException e) {
// 数据库连接失败异常处理
e.printStackTrace();
}
catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
finally {
System.out.println("\t\t\t\t\t\t\t\t获取数据库数据完毕!!!");
}
}
}