SPRING MVC3.2案例講解--SPRING MVC3的各種URL映射+JSP視圖跳轉(3)__JSP

本章節主要講解使用springmvc進行controller到view的轉向，涉及程式碼封裝含JSP視圖，

 

 

 

和上一章節最大的配置點不同是：

 

無任何視圖指向的Controller   @ResponseBody是關鍵代碼，表示直接返回內容，不轉向JSP視圖

@Controllerpublic class MappingController {@RequestMapping("/mapping/path")public @ResponseBody String byPath() {return "Mapped by path!";}}

 

指向具體視圖的Controller，無@ResponseBody，表示會指向某個JSP視圖

@Controller@RequestMapping("/views/*")public class ViewsController {@RequestMapping(value="html", method=RequestMethod.GET)public String prepare(Model model) {model.addAttribute("foo", "bar");model.addAttribute("fruit", "apple");return "views/html";}

 

基於視圖轉向的四種用法：

1.自己制定轉向的視圖

//  http://127.0.0.1:8010/views/html --->對應 views/html.jsp@RequestMapping(value="html", method=RequestMethod.GET)public String prepare(Model model) {model.addAttribute("foo", "bar");model.addAttribute("fruit", "apple");return "views/html";}

 

 

2.spring指向預設的視圖，通過org.springframework.web.servlet.view.DefaultRequestToViewNameTranslator實現預設視圖的轉向，見日誌資訊：

DEBUG DispatcherServlet Unable to locate RequestToViewNameTranslator with name 'viewNameTranslator': using default [org.springframework.web.servlet.view.DefaultRequestToViewNameTranslator@55a58f]

//  http://127.0.0.1:8010/views/viewName --->對應 views/viewName.jsp@RequestMapping(value="/viewName", method=RequestMethod.GET)public void usingRequestToViewNameTranslator(Model model) {model.addAttribute("foo", "bar");model.addAttribute("fruit", "apple");}

 

3.URI的 @PathVariable 的擷取，注意參數名稱必須一致。如：

 

//  http://127.0.0.1:8010/views/pathVariables/bar/apple --->對應 views/html.jsp@RequestMapping(value="pathVariables/{foo}/{fruit}", method=RequestMethod.GET)public String pathVars(@PathVariable String foo, @PathVariable String fruit) {// No need to add @PathVariables "foo" and "fruit" to the model// They will be merged in the model before renderingreturn "views/html";}

 

 

 

4. 利用URL的@PathVariable給JAVABEAN賦值 

 

//http://127.0.0.1:8010/views/dataBinding/bar/apple --->對應 views/dataBinding.jsp@RequestMapping(value="dataBinding/{foo}/{fruit}", method=RequestMethod.GET)public String dataBinding(@Valid JavaBean javaBean, Model model) {// JavaBean "foo" and "fruit" properties populated from URI variables return "views/dataBinding";}

 

public class JavaBean {@NotNullprivate String foo;@NotNullprivate String fruit;//注意此處有GET SET 方法，篇幅有限，不在文章中贅訴}

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