Spring mvc中@Requestmapping再探

这次继续复习spring mvc中的@requestmapping;

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";
}

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