java连接mysql数据查询数据
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!!!"); } } }