RequestParam注解：
示例：
@RequestMapping("/testRequestParam")
public String testRequestParam(@RequestParam(name="username") String un,@RequestParam(name="age",required=false,defaultValue="0") int age) {
System.out.println("testRequestParam: username="+un+" age="+age);
return SUCCESS;
}
RequestHeader注解：
示例：
@RequestMapping("/testRequestHeader")
public String testRequestHeader(@RequestHeader(name="Accept-Language") String al) {
System.out.println("testRequestHeader: al=" + al);
return SUCCESS;
}
CookieValue注解：
示例：
@RequestMapping("/testCookieValue")
public String testCookieValue(@CookieValue(name="JSESSIONID") String sid) {
System.out.println("testCookieValue:sid="+sid);
return SUCCESS;
}