SPRING MVC3.2案例讲解--SPRING MVC3的各种URL映射+JSP视图跳转(3)

本章节主要讲解使用springmvc进行controller到view的转向，涉及代码包含JSP视图，



 
 
 
和上一章节最大的配置点不同是：
 
无任何视图指向的Controller   @ResponseBody是关键代码，表示直接返回内容，不转向JSP视图

@Controller
public class MappingController {

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

 
指向具体视图的Controller，无@ResponseBody，表示会指向某个JSP视图

@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";
}

 
基于视图转向的四种用法：
1.自己制定转向的视图

//  http://127.0.0.1:8010/views/html --->对应 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指向默认的视图，通过org.springframework.web.servlet.view.DefaultRequestToViewNameTranslator实现默认视图的转向，见日志信息：
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 --->对应 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 的获取，注意参数名称必须一致！如：
 

//  http://127.0.0.1:8010/views/pathVariables/bar/apple --->对应 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 rendering
return "views/html";
}

 
 

 
4. 利用URL的@PathVariable给JAVABEAN赋值 
 

//http://127.0.0.1:8010/views/dataBinding/bar/apple --->对应 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 {

@NotNull
private String foo;

@NotNull
private String fruit;
//注意此处有GET SET 方法，篇幅有限，不在文章中赘诉
}

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