XMLHttpRequest 跨域访问

案例：ajax请求springMVC controller，跨域访问了要设置response.addHeader("Access-Control-Allow-Origin","*") ;

否则非IE浏览器会显示报错，或者前端页面收不到数据

代码如下：

@RequestMapping("/login.do")

public void login(@ModelAttribute WwUser wwUser,

HttpServletRequest request,HttpServletResponse response) throws Exception {

response.addHeader("Access-Control-Allow-Origin","*") ;

System.out.println("name="+wwUser.getWwUserName());

System.out.println("password="+wwUser.getWwUserPassword());

response.setContentType("text/html;charset=utf-8");

System.out.println("------------------------");

/*// 验证码

if (!rand.equals(request.getSession().getAttribute("rand"))) {

return "vfail";

}*/

// 验证用户名,密码

WwUser reUser = wwUserService.login(wwUser,request.getSession().getId());

if (reUser != null) {

request.getSession().setAttribute("wwUser", reUser);

//return "redirect:/manager/frame/account/account_list.jsp";

//response.getWriter().write("success");

// return "redirect:/manager/frame/account/account_list.jsp";

// return "success";

response.getWriter().write("success");

} else {

//return "forward:/manager/frame/account/account_list.jsp";

// return "upfail";

response.getWriter().write("fail");

}

}

-----------------------------------------------------------------------------------------------------------------------

$(function(){

$("#login").click(function(){

$.post("http://192.168.1.111:8080/BaseWeb/login.do", {

wwUserName: $("#username").val(),

wwUserPassword: $("#password").val()

}, function(backData){

alert(backData)

if(backData=="success"){

window.location.href='main.html';

}

});

});

});