实现登录，编写错误码，实现错误码返回json

src/main/java/com/fjy/spring/controller/LoginController.java

@@ -6,7 +6,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestParam;
 
 @Controller
 public class LoginController {
@@ -14,16 +13,16 @@ public class LoginController {
     @Autowired
     private UserService userService;
 
-    @GetMapping("/index")
+    @GetMapping(value = {"index",""})
     public String toLoginPage(){
         return "login";
     }
 
     @PostMapping("/login/dologin")
-    public boolean doLogin(TbUser tbUser){
+    public String doLogin(TbUser tbUser)throws Exception{
         if (userService.doLoginService(tbUser.getColname(),tbUser.getColpassword())){
-            return true;
+            return "home";
         }
-        return false;
+        return "login";
     }
 }