After accepting data with #requestbody, I want to return message or realize webpage-jump - ajax

Question

Controller:
#RequestMapping(value="receive", method=RequestMethod.POST, consumes="application/json")
#ResponseBody
public RegInfo receiveData(#RequestBody RegInfo info){
String reg_check = regInfoService.checkRegInfo(info);
......
}
RegInfo:
public class RegInfo {
private String account;
private String passwords;
private String realname;
private String phonenumber;
private String sex;
private String mailname;
.......}
register.jsp:
$("#sub").click(function(){
var m = {
"account": $("#_account").val(),
"passwords": $("#_pass").val(),
"realname": $("#real_name").val(),
"phonenumber": $("#phone_number").val(),
"sex": $("input:checked").val(),
"mailname": $("#mail_name").val()
};
$.ajax({
type:"POST",
async : false,
url:"/demo/user/receive",
dataType:"json",
contentType:"application/json; charset=utf-8",
data:JSON.stringify(m),
success:function(data){
alert("ok");
alert(data.realname);
},
erroe:function(data){
alert("保存失败 ")
}
})
});
Now I want to check RegInfo in the controller. If the result of check is legal, I want to jump to other webpage like login.jsp and if it is illegal, I want to return some message and show the message in register.jsp. How can I realize it?
complete Controller：
#Controller
#RequestMapping("/user")
public class LoginController {
#Autowired
private UserService userService;
#Autowired
private RegInfoService regInfoService;
#RequestMapping("/login")
public String homePage(){
return "user/login";
}
#RequestMapping("/loginin")
public String toLogin(#ModelAttribute("user")User user){
String u = userService.loginCheck(user);
System.out.println(u);
if(u == "success"){
return "user/success";
}
else{
return "user/login";
}
}
#RequestMapping("/register")
public String toRegister(){
return "user/register";
}
#RequestMapping("/success")
public String toSuccess(){
return "user/success";
}
#RequestMapping(value="receive", method=RequestMethod.POST, consumes="application/json")
#ResponseBody
public RegInfo receiveData(#RequestBody RegInfo info){
String reg_check = regInfoService.checkRegInfo(info);
System.out.println(reg_check);
System.out.println(info);
System.out.println(info.getRealname());
return info;
}
}

Answer 1

I want to jump to other webpage like login.jsp and if it is illegal, I
want to return some message and show the message in register.jsp. How
can I realize it?
Simple, in your AJAX success handler redirect with URL parameters like:
$.ajax({
type:"POST",
async : false,
url:"/demo/user/receive",
dataType:"json",
contentType:"application/json; charset=utf-8",
data:JSON.stringify(m),
success:function(data){
alert("ok");
alert(data.realname);
if (data.realname != undefined || data.realname!= null) {
window.location = '/login?realname=' + data.realname;
}
},
erroe:function(data){
alert("保存失败 ")
}
});
EDITS:
based on your comment the controller method will look like:
#Controller
#RequestMapping("/user")
public class LoginController {
#RequestMapping("/login")
public String homePage(Mode model, #RequestParam(value="realname",required=false)String realName){
if(realName!=null && (!realName.trim().isEmpty())){
model.addAttribute("regSuccessUser",realName);
}
return "user/login";
}
}
and redirect statement will look like:
window.location = '/user/login?realname=' + data.realname;
Note: URL start with contextPath to avoid 404 problems

Answer 2

I test as follows:
<input type="button" value="test" onClick="newpage()">
function newpage(){
window.location="/demo/user/login";}
then it jump to login.jsp successfully.In the ajax,it had run to "window.location" but didn't jump.It looks so strange.
Final solution：
error：
<input type="submit" id="sub" value="save" >
true：
<input type="button" id="sub" value="save" >
Form is submitted twice.