Java 固定资产管理系统源代码(103 页)Good is good, but better carries it.精益求精，善益求善。 用户登录 //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////package com.newer.property;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.sql.*;import java.sql.Statement;import java.sql.ResultSet;import javax.swing.JButton;import javax.swing.JLabel;import javax.swing.JTextField;import javax.swing.JPasswordField;import javax.swing.JPanel;import javax.swing.JFrame;public class user_land extends JFrame implements ActionListener{static Connection conn=null;static Statement stat=null;static ResultSet rs=null;static String url="jdbc:sqlserver://127.0.0.1:1433;DatabaseName=_Property";static String user="sa";static String password="";JPanel p1,p2,p3,p4,p5;JLabel lbl1,lbl2,lbl3,lbl4;JTextField txt_name;JPasswordField txt_pwd;JButton btn1,btn2,btn3;static{try{Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");}catch(Exception e){System.out.println("加载驱动失败");e.printStackTrace();}}public user_land(){this.setTitle("固定资产及设备用户登录");p1=new JPanel();p2=new JPanel();p3=new JPanel();p4=new JPanel();p5=new JPanel();lbl1=new JLabel("欢迎登录");lbl2=new JLabel("用户名：");lbl3=new JLabel("密 码：");lbl4=new JLabel();txt_name=new JTextField(10);txt_pwd=new JPasswordField(10);btn1=new JButton("登录");btn2=new JButton("清空");btn3=new JButton("退出");p1.add(lbl1);p2.add(lbl2);p2.add(txt_name);p3.add(lbl3);p3.add(txt_pwd);p4.add(btn1);p4.add(btn2);p4.add(btn3);p5.add(lbl4);this.setLayout(new GridLayout(5,1));this.add(p1);this.add(p2);this.add(p3);this.add(p4);this.add(p5);this.setBounds(400, 300, 400, 300);this.setDefaultCloseOperation(EXIT_ON_CLOSE);this.setVisible(true);//添加按钮登录事件btn1.addAc...
