springMVC的@RequestMapping的参数和用法

@Controller
//映射 控制器类
@RequestMapping("/hellotest")
public class Hello2 {
    public final static String DISPATCHER  ="show";
    
    @RequestMapping("/test")
    public String testUrl(){
        
        System.out.println("testUrl=http://localhost:8080/springMVC/hellotest/test");
        return DISPATCHER;
    }
     /**
      * get动作请求的测试
      * @return
      */
    @RequestMapping(method=RequestMethod.GET,value="/testMethodGet")
    public String testMethodGet(){
        System.out.println("get..............");
        return DISPATCHER;
    }
      /**
     * post动作请求的测试
     * @return
     */
    @RequestMapping(method=RequestMethod.POST,value="/testMethodPost")
    public String testMethodPost(){
        System.out.println("post..............");
        return DISPATCHER;
    }
    /**
     * 测试url中带参数(未测试请求头信息)
     * @return
     */
    @RequestMapping(value="/testHeadersAndParams",
            params={"username","sex!=1","password=123"},
            method=RequestMethod.GET)
    public String testHeadersAndParams(){
        //url http://localhost:8080/springMVC/hellotest/testHeadersAndParams?username=10&password=123&sex=2
        System.out.println("testHeadersAndParams");
        return DISPATCHER;
    }
    //PathVariable 映射 URL 绑定占位  ( 映射URL路径里面的变量)
    @RequestMapping(value="/testPathVariable/{id}",method=RequestMethod.GET)
    public String testPathVariable(@PathVariable("id") Integer id){
        System.out.println("testPathVariable  id:"+id);
        //http://localhost:8080/springMVC/hellotest/testPathVariable/5
        return DISPATCHER;
    }

    @RequestMapping(value="/testPathVariable2/{name}",method=RequestMethod.GET)
    public String testPathVariable2(@PathVariable("name") String name){
        System.out.println("testPathVariable  name :"+name);
        // http://localhost:8080/springMVC/hellotest/testPathVariable2/str
      return DISPATCHER;
    }
    @RequestMapping()
    public String test(){
         return DISPATCHER;
    }
}