。

src/main/java/com/bookinfo/rest/ProductPageController.java

@@ -36,15 +36,17 @@ public class ProductPageController {
     }
 
     @PostMapping("/login")
-    public void login(@RequestParam(name = "username", required = true) String username,
+    public String login(@RequestParam(name = "username", required = true) String username,
                         HttpServletRequest request){
         String user = username;
         request.getSession().setAttribute("user", user);
+        return "productpage";
         //return "redirect:/productpage";
     }
     @GetMapping("/logout")
-    public void destroySession(HttpServletRequest request) {
+    public String destroySession(HttpServletRequest request) {
         request.getSession().invalidate();
+        return "productpage";
         //return "redirect:/productpage";
     }