路径：home/testRequestHeader
/**
* 映射请求头信息
* 路径：home/testRequestHeader
* @param val
* @return
*/
@RequestMapping("testRequestHeader")
public String testRequestHeader(@RequestHeader(value="Accept-Language") String val){
System.out.println("Accept-Language=" + val);
return "home_index";
}控制台输出：Accept-Language=zh-CN,zh;q=0.8,en;q=0.6,fr;q=0.4
