这是网页代码：
<
<div class="login_button">
<input class="btn" type="button" value="登录" onclick="usesrLogin()">
</div>
这是js
"use strict";
window.onload = function (){
background();
$(".login_input").val("admin001")
$(".login_tips").css("display","none")
}
function inputFocus(e){
$(e).parent().siblings(".login_tips").css("color", "#ddd");
}
function inputBlur(e){
$(e).parent().siblings(".login_tips").css("color", "#aaa");
}
function inputUp(e){
var count=$(e).val().length;
if(count==0){
$(e).parent().siblings(".login_tips").css("display","block");
}else{
$(e).parent().siblings(".login_tips").css("display","none");
}
}
function background(){
$(".background_img").css("opacity", "1");
}
function usesrLogin() {
console.info("login")
$.ajax({
url: 'UserServlet',
type: 'POST',
async: true,
timeout: 5000,
data:{
method: "userLogin",
userName: $("#username").val(),
userPassword: $("#password").val()
},
beforeSend: function (){
},
success: function (msg){
if (msg == "登录成功"){
$(location).attr('href', 'main.html')
}else {
alert(msg)
}
},
error: function (){
},
complete: function (){
}
});
}
function usesrRegister(){
$.ajax({
url: 'UserServlet',
type: 'POST',
async: true,
timeout: 5000,
data:{
method: "userRegister",
userName: $("#username").val(),
userPassword: $("#password").val()
},
beforeSend: function (){
},
success: function (msg){
alert(msg)
},
error: function (){
},
complete: function (){
}
});
}这是java代码
@WebServlet(name = "UserServlet", urlPatterns = "/UserServlet")
public class UserServlet extends HttpServlet {
private final int MIN_USER_NAME = 8;
private final int MIN_USER_PASSWORD = 6;
private static UserService userService = new UserSlmpl();
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
String method = request.getParameter("method");
PrintWriter pw = response.getWriter();
System.out.println("收到的请求method：" + method);
switch (method){
case "userRegister":
userRegister(request, response, pw);
break;
case "userLogin":
userLogin(request, response, pw);
break;
default:
}
}
private void userLogin(HttpServletRequest request, HttpServletResponse response, PrintWriter pw) throws IOException, ServletException{
String user = request.getParameter("userName");
String pasw = request.getParameter("userPassword");
if (user.length() < MIN_USER_NAME) {
pw.write("用户名必须大于8位");
return;
}
if (pasw.length() < MIN_USER_PASSWORD) {
pw.write("密码必须大于6位");
return;
}
if (userService.ifUserNameNotExist(user)) {
pw.write("用户名不存在");
return;
}
if (userService.login(user, pasw)) {
pw.write("登录成功");
} else {
pw.write("密码错误");
}
}
private void userRegister(HttpServletRequest request, HttpServletResponse response, PrintWriter pw) throws IOException{
String user = request.getParameter("userName");
String pasw = request.getParameter("userPassword");
if (user.length() < MIN_USER_NAME) {
pw.write("用户名必须大于8位");
return;
}
if (pasw.length() < MIN_USER_PASSWORD) {
pw.write("密码必须大于6位");
return;
}
if (userService.register(user, pasw)) {
pw.write("注册成功");
} else {
pw.write("用户名已存在");
}
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}你发一些控制台错误或者网页错误看看 这些代码不容易看出问题所在