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这篇文章主要介绍了java通过JFrame做一个登录系统的界面完整代码示例,具有一定借鉴价值,需要的朋友可以参考下。
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在java的JFrame内通过创建匿名对象的方式做登录界面
package com.sxt;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
public class LoginFrame extends JFrame{
JTextField txtname=new JTextField();
JPasswordField txtpass=new JPasswordField();
JButton bl=new JButton("登录");
JButton bg=new JButton("关闭");
//构造无参构造器把主要的方法放在构造器里,然后在main方法里面调
public LoginFrame(){
setBounds(25,25,250,250);
Container c = getContentPane();
c.setLayout(new GridLayout(4,2,10,10));
c.add(new JLabel("用户名"));
c.add(txtname);
c.add(new JLabel("密码"));
c.add(txtpass);
c.add(bl);
c.add(bg);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
//注意:此处是匿名内部类
bg.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
System.exit(0);
}
}
);
//注意:此处是匿名内部类
bl.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
界面建议用可视化来做,美观且便捷。下面这个是完全用代码写的,仅供参考。
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.sql.*;
public class Register extends JFrame {
JLabel jl1 = new JLabel("用户名");
JTextField jt1 = new JTextField();
JLabel jl2 = new JLabel("邮箱");
JTextField jt2 = new JTextField();
JLabel jl3 = new JLabel("密码");
JPasswordField jpw1 = new JPasswordField();
JLabel jl4 = new JLabel("密码确认");
JPasswordField jpw2 = new JPasswordField();
JButton register = new JButton("注册");
JButton clean = new JButton("清空");
public Register(){
setLayout(new GridLayout(5,2));
add(jl1);
add(jt1);
add(jl2);
add(jt2);
add(jl3);
add(jpw1);
add(jl4);
add(jpw2);
add(register);
add(clean);
String name = jt1.getText();
String email = jt2.getText();
String pw = jpw1.getText();
register.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
try{
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection("jdbc:mysql://localhost/db","root","");
Statement sta = con.createStatement();
sta.executeUpdate("INSERT INTO register VALUES(name,email,pw)");
JOptionPane.showMessageDialog(null,"注册成功","提示",JOptionPane.INFORMATION_MESSAGE);
}
catch(Exception ex){
ex.getStackTrace();
}
}
});
clean.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
jt1.setText("");
jt2.setText("");
jpw1.setText("");
jpw2.setText("");
}
});
}
public static void main(String[] args){
Register frame = new Register();
frame.setTitle("用户注册");
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(400,400);
frame.setVisible(true);
}
}
Java写提示注册成功的方法如下:
1、首先用户注册完成后,返回一个boolean值的变量;
2、利用Servlet类判断这个变量,如果为true,跳转到提示界面,提示用户注册成功,如果为false,跳转到提示界面,提示用户注册失败;
3、具体代码如下所示:
public class DemoServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String username = request.getParameter("username");
String usepwd= request.getParameter("usepwd");
boolean flag = Dao.register(username,usepwd);//注册方法
if(flag){
//提示注册成功
request.getRequestDispatcher("/success.jsp").forward(request, response);
}else{
//提示注册失败
request.getRequestDispatcher("/success.jsp").forward(request, response);
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
4、至此,就完成了提示注册成功的功能。
效果图
代码
!DOCTYPE html
html
head
meta charset="UTF-8"
title先锋图书馆管理系统-登录/title
style
*{
margin: 0;
padding: 0;
list-style: none;
}
#top{
width: 1000px;
height: 95px;
margin: 0 auto;
margin-top: 25px;
}
#top_top{
width: 1000px;
height: 65px;
background: deepskyblue;
}
#top_top_left{
width: 300px;
height: 65px;
float: left;
}
#top_top_leftlabel{
width: 200px;
height: 65px;
color: white;
float: right;
}
#top_top_left#a2{
padding-left: 10px;
padding-top: 20px;
font-size: 16px;
}
#top_bottom{
width: 1000px;
height: 30px;
}
#top_bottom_left{
width: 340px;
height: 30px;
line-height: 30px;
font-size: 12px;
background: skyblue;
color: white;
text-indent: 2em;
float: left;
}
#top_bottom_right{
width: 660px;
height: 30px;
line-height: 30px;
font-size: 12px;
color: blueviolet;
text-align: center;
float: right;
background: lightskyblue;
}
#content{
width: 1000px;
height: 600px;
margin: 0 auto;
background:#587FBA;
}
#content#text{
width: 1000px;
height: 50px;
line-height: 50px;
padding-top: 100px;
font-size: 36px;
font-family:"楷体";
font-weight: bold;
text-align: center;
}
#content#login{
width: 480px;
height: 210px;
margin-top: 20px;
margin-left: 260px;
background: #85A0CB;
}
#content#loginimg{
float: left;
}
#content#login#select{
width: 305px;
height: 210px;
float: right;
}
#content#login#selectdiv{
width: 230;
height: 30px;
margin-left: 30px;
}
#content#login#select#d1{
margin-top:30px;
margin-bottom: 3px;
}
#content#login#selectp{
font-size: 14px;
margin-left: 95px;
}
#bottom{
width: 1000px;
height: 35px;
line-height: 35px;
margin: 0 auto;
background: deepskyblue;
text-align: center;
color: white;
}
/style
/head
body
div id="top"
div id="top_top"
div id="top_top_left"
img src="img/test/a13.png" width="78px" height="65px"label id="a2"先锋图书馆系统管理平台/label
/div
/div
div id="top_bottom"
div id="top_bottom_left"当前位置 : 首页 系统管理 登录/div
div id="top_bottom_right"当前时间 : label id="lable"/label/div
/div
/div
div id="content"
div id="text"欢迎登录先锋图书馆管理系统/div
div id="login"
img src="img/test/a14.png" width="175px" height="210px"/
form id="select"
div id="d1"用户名: nbsp;nbsp;input type="text" //div
div密 nbsp; 码: nbsp;nbsp;input type="password" //div
p
input type="radio" name="user" value="read"/读者nbsp;nbsp;nbsp;nbsp;
input type="radio" name="user" value="admin"/管理员
/pbr/
p
input type="button" value="确定" style="width: 50px;" onclick="put()"/nbsp;nbsp;nbsp;nbsp;
input type="reset" value="重置" style="width: 50px;"/
/p
/form
/div
/div
div id="bottom"欣欣科技有限公司版权所有/div
/body
script type="text/javascript" src="JQuery/jquery.js"/script
script type="text/javascript" src="js/GetCurrentTime.js"/script
script
//验证用户名和密码
function put(){
var d = $("#selectdivinput");//获取用户名和密码
var name = d[0].value;
var pass = d[1].value;
var user = null;
var r = document.getElementsByName("user");//获取用户类型
for(i=0;ir.length;i++){
if(r[i].checked){
user=r[i].value;
}
}
//console.log(name + "," +pass + "," +user);//输出测试
if(user==null){
window.alert("请选择用户类型!");
}else if(user=="admin" name!="admin"){
window.alter("用户名错误!");
}else if(user=="admin" name=="admin" pass!="123456"){
window.alert("密码错误!");
}else if(name=="admin" pass=="123456" user=="admin"){
window.location.href="work_02_welcome.html";//在js中在本页面中打开新链接
}else{
window.alert("用户名错误");
}
}
/script
/html