diff --git a/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java b/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java
old mode 100755
new mode 100644
index 66b3ea7..07185c5
--- a/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java
+++ b/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java
@@ -1,29 +1,30 @@
-package com.didispace.web;
-
-import org.springframework.stereotype.Controller;
-import org.springframework.ui.ModelMap;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-/**
- *
- * @author 程序猿DD
- * @version 1.0.0
- * @blog http://blog.didispace.com
- *
- */
-@Controller
-public class HelloController {
-
-    @RequestMapping("/hello")
-    public String hello() {
-        return "Hello World";
-    }
-
-    @RequestMapping("/")
-    public String index(ModelMap map) {
-        map.addAttribute("host", "http://blog.didispace.com");
-        return "index";
-    }
-
+package com.didispace.web;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.ModelMap;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ *
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @blog http://blog.didispace.com
+ *
+ */
+@Controller
+public class HelloController {
+    
+    @ResponseBody
+    @RequestMapping("/hello")
+    public String hello() {
+        return "Hello World";
+    }
+
+    @RequestMapping("/")
+    public String index(ModelMap map) {
+        map.addAttribute("host", "http://blog.didispace.com");
+        return "index";
+    }
+
 }
\ No newline at end of file