struts2通过jquery ajax登陆

登陆页面login.jsp

$.ajax( {    url :"<%=basePath%>euser/euser_login.action",    type :"post",    dataType :"json",    data :"username=" + $("#username").val()      + "&password=" + $("#password").val() + "&vercode=" + $("#vercode").val(), //   timeout :20000,// 设置请求超时时间（毫秒）。    error : function() {// 请求失败时调用函数。     $("#loginResult").html("请求失败!");    },    success :function (data){    //alert(data);    if(1 == data){//alert("登陆成功");location.href = "<%=basePath%>euser/euser_indexUI.action" ;}else if(2 == data){$("#username_Info").html("用户名或者密码错误!");$("#username").val("");$("#password").val("");$("#vercode").val("");reloadImg();    }else if(4 == data){$("#vercode_Info").html("验证码错误!");reloadImg();}    }   });

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Action处理函数

public String login() throws Exception {String user_name = (String) getRequest().getParameter("username");String pass_word = (String) getRequest().getParameter("password");String ver_code = (String) getRequest().getParameter("vercode");username = user_name;password = pass_word;vercode = ver_code;Euser EuserForm = new Euser();EuserForm.setUsername(username);EuserForm.setPassword(password);String ver = (String) super.getSession().getAttribute("rand");vercode = vercode.trim().toLowerCase();super.getSession().setAttribute("rand", null);if (null != this.username && !"".equals(this.username.trim())&& null != this.password && !"".equals(this.password.trim())) {if (null != vercode && !"".equals(vercode) && vercode.equals(ver)) {Euser loginEuser = euserService.login(EuserForm);if (loginEuser != null) {WebUtil.putLoginEuser(super.getRequest(), loginEuser);response.setContentType("text/html;charset=UTF-8");response.setCharacterEncoding("UTF-8");// 防止弹出的信息出现乱码PrintWriter out = response.getWriter();out.print(LOGIN_SUCCESS);out.flush();out.close();return null;} else {response.setContentType("text/html;charset=UTF-8");response.setCharacterEncoding("UTF-8");// 防止弹出的信息出现乱码PrintWriter out = response.getWriter();out.print(LOGIN_USERNAME_ERROR);out.flush();out.close();return null;}} else {response.setContentType("text/html;charset=UTF-8");response.setCharacterEncoding("UTF-8");// 防止弹出的信息出现乱码PrintWriter out = response.getWriter();out.print(LOGIN_VERCODE_ERROR);out.flush();out.close();return null;}} else {response.setContentType("text/html;charset=UTF-8");response.setCharacterEncoding("UTF-8");// 防止弹出的信息出现乱码PrintWriter out = response.getWriter();out.print(LOGIN_USERNAME_ERROR);out.flush();out.close();return null;}}

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