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登入界面的创建

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Scanner;

//登入
public class Demo2 {

      public static void main(String[] args) {

                 Connection connection = null;
      Statement statement = null;
        ResultSet rset = null;
                 String url = "jdbc:mysql:///eqet";
      String user = "root";
      String password = "root";

     Scanner input = new Scanner(System.in); //手动输入
      System.out.println("\t 个人用户管理");
      System.out.print("请登入账号:");
      String name = input.next(); 
      System.out.print("请登入密码:");
      String password1 = input.next();

      try {
        Class.forName("com.mysql.jdbc.Driver");//加载驱动
        connection =DriverManager.getConnection(url, user, password);//连接对象
        statement = connection.createStatement();//获取Statement对象

     String sql = "SELECT * FROM master WHERE name=‘"+name+"‘ AND Password = ‘"+password1+"‘";

        rset = statement.executeQuery(sql);//查询

        if (rset.next()) {
      System.out.println("登入成功");
        }else{
      System.out.println("登入失败");
        }  
        } catch (Exception e) {
          e.printStackTrace();
        }finally{

        try {//关闭资源 切记一定要   先开的后关,后开的先关
        if (null!=rset) {
        rset.close();
        }
        if(null!=statement){
        statement.close();
        }
        if (null!=connection) {
        connection.close();
        }
        } catch (Exception e2) {
       }
      }
    }

  }

 

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登入界面的创建