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SpringBoot Controller接收参数的几种常用方式

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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);
}
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输出结果:
id=123
name=suki_rong

第二类:Body参数
因为是POST请求,这里用Postman的截图结合代码说明

1、@RequestBody
例子

demo1

对应的java代码:

@PostMapping(path = “/demo1”)
public void demo1(@RequestBody Person person) {
System.out.println(person.toString());
}
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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 person) {
System.out.println(person.get(“name”));
}
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输出结果:
suki_rong

2、无注解
例子

demo2

对应的java代码:

@PostMapping(path = “/demo2”)
public void demo2(Person person) {
System.out.println(person.toString());
}
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输出结果:
name:suki_rong;age=18;hobby:programing

Person类
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

}
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第三类:请求头参数以及Cookie
1、@RequestHeader
2、@CookieValue
例子
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);
}
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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());
}
}

}

作者:suki_rong
来源:CSDN
原文:https://blog.csdn.net/suki_rong/article/details/80445880
版权声明:本文为博主原创文章,转载请附上博文链接!

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