@RequestParam:获取请求头上的参数:
例:
http://localhost:8090/hello?id=2
//使用@RequestParam注解获取id
public String Demo1(@RequestParam String id){
System.out.println("链接中请求参数的id:"+id);
return null;
}
@RequestBody:获取请求体中的参数,可以将json数据映射到Map或实体类上
//异步请求部分代码
$.ajax({
url:"/hello",
type:"POST",
data:'{"id":"123","name":"chenyc"}',
content-type:"application/json charset=utf-8",
success:function(data){
alert(data);
}
});
//@requestBody注解获取数据代码
@RequestMapping("/hello")
public String hello(@requestBody User user){
System.out.println("id:"+user.getId()+";"+"name:"+user.getName());
}
@PathVariable注解
顾名思义:路径变量,即是获取链接路径上的变量,例如获取下面链接的id:
//链接(注意比较上面一条链接)
http://localhost:8090/hello/2
//使用@PathVariable注解获取id
@RequestMapping(value = "/getBook/{id}", method = RequestMethod.GET)
public String getBook(@PathVariable Integer id) {
try {
system.out.println("路径上的id:"+id);
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}