Postman 前端传递参数

发布于：2025-09-11 ⋅ 阅读:(13) ⋅ 点赞:(0)

1.介绍

2.传递一个参数

注意

可以使用包装类

3.传递多个参数

@RequestMapping("/param2")
    public String param2(String userName, String password){
        return "接收到参数:userName:"+userName +",password:"+ password;
    }

4.传递对象

package com.bite.springmvc;

public class UserInfo {
    private String userName;
    private  Integer age;
    private String password;

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public Integer getAge() {
        return age;
    }

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

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "UserInfo{" +
                "userName='" + userName + '\'' +
                ", age=" + age +
                ", password='" + password + '\'' +
                '}';
    }
}

 @RequestMapping("/param3")
    public String param3(UserInfo userInfo){
        return "接收到参数:userInfo:"+ userInfo;
    }

5.后端参数重命名

此时因为前后端传送不一致,name无法接收到

这样写就会把前端的userName绑定给后端的name

此时就没问题了

但是此时传输时就必须传name值不能空着

只需要加上红框这段代码,就没问题了

6.传递数组

有两种方式

6.1

前端传递多个key时,会自动组装成一个数组

6.2

7.传递集合

发现报错了

这样修改一下

成功

8.传递JSON数据

8.1概念

JSON可以代表上面所有数据

8.2JSON语法

对象转JSON

public class JSONUtilTests {
    private static ObjectMapper objectMapper = new ObjectMapper();

    public static void main(String[] args) throws JsonProcessingException {
        //对象转JSON
        UserInfo userInfo = new UserInfo();
        userInfo.setUserName("zhangsan");
        userInfo.setAge(18);
        userInfo.setPassword("123456");

        String userJson = objectMapper.writeValueAsString(userInfo);
        System.out.println(userJson);
    }
}

JSON转对象

public class JSONUtilTests {
    private static ObjectMapper objectMapper = new ObjectMapper();

    public static void main(String[] args) throws JsonProcessingException {

        //JSON转对象
        String jsonStr = "{\"userName\":\"zhangsan\",\"age\":18,\"password\":\"123456\"}";
        UserInfo userInfo1 = objectMapper.readValue(jsonStr, UserInfo.class);
        System.out.println(userInfo1);
    }
}

8.3JSON优点

8.4传递JSON对象

传递JSON对象还是用对象去接收

@RequestMapping("/param7")
    public String param7(@RequestBody UserInfo userInfo){
        return "接收到参数userInfo:"+ userInfo;
    }

9获取URL中参数@PathVariable

  @RequestMapping("/param8/{articleId}")
    public String param8(@PathVariable("articleId")Integer articleId){
        return "接收到参数articleId:"+ articleId;
    }