SpringBoot中Controller接收参数几种方式

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

import com.yeexun.entity.Person;
import org.springframework.web.bind.annotation.*;
import java.util.Map;

@RestController
@RequestMapping("/demo")
public class TestAcceptParamController {

    @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);
    }

    @PostMapping(path = "/demo1")
    public void demo1(@RequestBody Map person) {
        System.out.println(person.get("name"));
    }

    @PostMapping(path = "/demo2")
    public void demo2(Person person) {
        System.out.println(person.getId()+"-id");
        System.out.println(person.getName()+"-name");
    }
}

GET请求：http://localhost:8080/demo/demo/123?name=zhangsan

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

代码

    @PostMapping(path = "/demo1")
    public void demo1(@RequestBody Map person) {
        System.out.println(person.get("name"));
    }

Postman选项配置里面记得选Body，row，JSON

 

当然上面的代码中Map也可以换成实体类Person

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

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getHobby() {
        return hobby;
    }

    public void setHobby(String hobby) {
        this.hobby = hobby;
    }
}

2、无注解

例子

代码

    @PostMapping(path = "/demo2")
    public void demo2(Person person) {
        System.out.println(person.getId()+"-id");
        System.out.println(person.getName()+"-name");
    }

 Post请求方式，Body中的表单数据

 结果为

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);
}

或者

@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());
        }
    }
}