[add] add Model examples of spring MVC

brianway · brianway · commit 2aa1c707fb8f · 2016-08-23T21:27:24.000+08:00
diff --git a/spring-mvc/src/main/java/com/brianway/learning/spring/mvc/web/UserController.java b/spring-mvc/src/main/java/com/brianway/learning/spring/mvc/web/UserController.java
@@ -11,13 +11,16 @@
 import static org.springframework.http.MediaType.IMAGE_PNG_VALUE;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
+import org.springframework.ui.ModelMap;
 import org.springframework.util.FileCopyUtils;
 import org.springframework.web.bind.annotation.ModelAttribute;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.SessionAttributes;
+import org.springframework.web.bind.support.SessionStatus;
 import org.springframework.web.servlet.ModelAndView;
 
 import java.io.IOException;
@@ -27,6 +30,7 @@
  */
 @Controller
 @RequestMapping("/user")
+@SessionAttributes("userSession")
 public class UserController {
 
     @Autowired
@@ -79,4 +83,55 @@ public ResponseEntity<byte[]> showEntity(@PathVariable("imageId") String imageId
         return responseEntity;
     }
 
+    @RequestMapping(value = "/setId")
+    public String setId(@ModelAttribute("user") User user) {
+        user.setUserId("1000");
+        return "user/createSuccess";
+    }
+
+    /**
+     * 访问UserController任何一个请求处理方法前,
+     * Spring MVC 先执行该方法,并将返回值以 user 为键添加到模型中
+     */
+    @ModelAttribute("user")
+    public User getUser() {
+        User user = new User();
+        user.setUserId("1001");
+        user.setUserName("Brian");
+        return user;
+    }
+
+    @RequestMapping(value = "/show")
+    public String show(ModelMap modelMap) {
+        modelMap.addAttribute("testAttr", "testValue");
+        User user = (User) modelMap.get("user");
+        user.setUserName("Way");
+        return "/user/showUser";
+    }
+
+    @RequestMapping(value = "/showRedirect")
+    public String showRedirect(@ModelAttribute("userSession") User user) {
+        user.setUserName("Netty");
+        return "redirect:/user/showSession";
+    }
+
+    @RequestMapping(value = "/showSession")
+    public String showSession(ModelMap modelMap, SessionStatus sessionStatus) {
+        User user = (User) modelMap.get("userSession");
+        if (user != null) {
+            user.setUserId("2001");
+            sessionStatus.setComplete();
+        }else{
+            System.out.println("null userSession");
+        }
+        return "/user/showUser";
+    }
+
+    @ModelAttribute("userSession")
+    public User getUserSession() {
+        User user = new User();
+        user.setUserId("2000");
+        user.setUserName("Apple");
+        return user;
+    }
 }
diff --git a/spring-mvc/src/main/webapp/WEB-INF/views/user/showUser.jsp b/spring-mvc/src/main/webapp/WEB-INF/views/user/showUser.jsp
@@ -0,0 +1,12 @@
+<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
+<html>
+<head>
+    <title>用户信息</title>
+</head>
+<body>
+当前用户是${user.userName},userId为${user.userId}
+<c:if test="userSession != null">
+    <br> session用户是${userSession.userName},userId为${userSession.userId}
+</c:if>
+</body>
+</html>
