第一类：请求路径参数
1、@PathVariable
获取路径参数。即url/{id}这种形式。
2、@RequestParam
获取查询参数。即url?name=这种形式
例子
GET
http://localhost:8080/demo/123?name=suki_rong
对应的java代码：
@GetMapping("/demo/{id}")
public void demo(@PathVariable(name = "id") String id, @RequestParam(name = "name") String name) {
System.out.println("id="+id);
System.out.println("name="+name);
}
输出结果：
id=123
name=suki_rong
因为是POST请求，这里用Postman的截图结合代码说明
例子：
对应的java代码：
@PostMapping(path = "/demo1")
public void demo1(@RequestBody Person person) {
System.out.println(person.toString());
}
输出结果：
name:suki_rong;age=18;hobby:programing
也可以是这样
@PostMapping(path = "/demo1")
public void demo1(@RequestBody Map<String, String> person) {
System.out.println(person.get("name"));
}
输出结果：
suki_rong
对应的java代码：
@PostMapping(path = "/demo2")
public void demo2(Person person) {
System.out.println(person.toString());
}
输出结果：
name:suki_rong;age=18;hobby:programing
public class Person {
private long id;
private String name;
private int age;
private String hobby;
@Override
public String toString(){
return "name:"+name+";age="+age+";hobby:"+hobby; }
// getters and setters
}
java代码：
@GetMapping("/demo3")
public void demo3(@RequestHeader(name = "myHeader") String myHeader, @CookieValue(name = "myCookie") String myCookie) {
System.out.println("myHeader=" + myHeader);
System.out.println("myCookie=" + myCookie);
}
也可以这样：
@GetMapping("/demo3") public void demo3(HttpServletRequest request) {
System.out.println(request.getHeader("myHeader"));
for (Cookie cookie : request.getCookies()) {
if ("myCookie".equals(cookie.getName())) {
System.out.println(cookie.getValue());
}
}
}
原文：https://www.cnblogs.com/jiex123/p/13752541.html