Spring mvc中@Requestmapping再探

1) 普通path路径 

 @RequestMapping(value = "/foos")
 @ResponseBody
 public String getFoosBySimplePath() {
     return "Get some Foos";
 }

  然后尝试用curl请求下 
  curl -i http://localhost:8080/spring-mvc/foos 

2) 指定RequestMethod.POST 

 @RequestMapping(value = "/foos", method = RequestMethod.POST)
 @ResponseBody
 public String postFoos() {
     return "Post some Foos";
 }

  curl i -X POST http://localhost:8080/spring-mvc/foos 

3) 指定http请求头 
 

 @RequestMapping(value = "/foos", headers = "key=val")
 @ResponseBody
 public String getFoosWithHeader() {
     return "Get some Foos with Header";
 }

   其中在headers可以跟多个了,如: 

 @RequestMapping(value = "/foos", headers = { "key1=val1", "key2=val2" })
 @ResponseBody
 public String getFoosWithHeaders() {
     return "Get some Foos with Header";
 }

  注意curl的请求为: 
curl -i -H "key:val" http://localhost:8080/spring-mvc/foos 


4)@RequestMapping中的新的product和consume. 
   在spring 3.0中,可以指定请求头的media格式,如: 
 

 @RequestMapping(value = "/foos", method = RequestMethod.GET, headers = "Accept=application/json")
 @ResponseBody
 public String getFoosAsJsonFromBrowser() {
     return "Get some Foos with Header Old";
 }

  curl测试: 
curl -H "Accept:application/json,text/html" http://localhost:8080/spring-mvc/foos 

如果在3.1中,则有新的 produces和consume的属性了,如: 

 @RequestMapping(value = "/foos", method = RequestMethod.GET, produces = "application/json")
 @ResponseBody
 public String getFoosAsJsonFromREST() {
     return "Get some Foos with Header New";
 }

  如果用3.1,但依然用旧的方式,则旧的方式的请求都会自动变成produces和consume了; 

@RequestMapping(value="/testMsgConverter",consumes="text/plain",produces="application/json")  
  
表示handlermethod接受的请求的header中的 Content-Type为text/plain; 
Accept为application/json 



5) @PathVariable 
   1 单一的 
  

 @RequestMapping(value = "/foos/{id}")
 @ResponseBody
 public String getFoosBySimplePathWithPathVariable(@PathVariable("id") long id) {
    return "Get a specific Foo with id=" + id;
 }

测试:curl http://localhost:8080/spring-mvc/foos/1 

2 多个 
 

 @RequestMapping(value = "/foos/{fooid}/bar/{barid}")
 @ResponseBody
 public String getFoosBySimplePathWithPathVariables(@PathVariable long fooid, @PathVariable long barid) {
     return "Get a specific Bar with id=" + barid + " from a Foo with id=" + fooid;
 }

  curl http://localhost:8080/spring-mvc/foos/1/bar/2 
3 也支持正则表达式 
 

 @RequestMapping(value = "/bars/{numericId:[\\d]+}")
 @ResponseBody
 public String getBarsBySimplePathWithPathVariable(@PathVariable final long numericId) {
     return "Get a specific Bar with id=" + numericId;
 }

则参数只接受数字了 

6) requestparam 
 

 http://localhost:8080/spring-mvc/bars?id=100

 @RequestMapping(value = "/bars")
 @ResponseBody
 public String getBarBySimplePathWithRequestParam(@RequestParam("id") long id) {
     return "Get a specific Bar with id=" + id;
 }

 @RequestMapping(value = "/bars", params = "id")
 @ResponseBody
 public String getBarBySimplePathWithExplicitRequestParam(@RequestParam("id") long id) {
     return "Get a specific Bar with id=" + id;
 }

7) RequestMapping支持多个映射路径映射到同一个controller,如: 

 @RequestMapping(value = { "/advanced/bars", "/advanced/foos" })
 @ResponseBody
 public String getFoosOrBarsByPath() {
     return "Advanced - Get some Foos or Bars";
 }

  curl -i http://localhost:8080/spring-mvc/advanced/foos 
curl -i http://localhost:8080/spring-mvc/advanced/bars 

甚至还支持put,post同时请求,如: 

 @RequestMapping(value = "/foos/multiple", method = { RequestMethod.PUT, RequestMethod.POST })
 @ResponseBody
 public String putAndPostFoos() {
     return "Advanced - PUT and POST within single method";
 }