springboot controller 参数绑定-优快云博客

本文链接：https://blog.youkuaiyun.com/vincent_duan/article/details/100880481

本文介绍如何在SpringBoot项目中实现前后端参数的自动绑定，通过示例展示了User和Privileges对象如何接收并处理来自前端的POST请求数据，包括JSON格式的数据处理和list类型参数的接收。

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springboot可以实现前后端参数绑定

普通POST请求

User.java

package cn.ac.iie.bean;

import java.util.List;

public class Privileges {

    private String userName;
    private String authorityType;
    private List<String> authorityApps;

    public Privileges(String userName, String authorityType, List<String> authorityApps) {
        this.userName = userName;
        this.authorityType = authorityType;
        this.authorityApps = authorityApps;
    }

    public Privileges() {
    }

    @Override
    public String toString() {
        return "Privileges{" +
                "userName='" + userName + '\'' +
                ", authorityType='" + authorityType + '\'' +
                ", authorityApps=" + authorityApps +
                '}';
    }

    public String getUserName() {
        return userName;
    }

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

    public String getAuthorityType() {
        return authorityType;
    }

    public void setAuthorityType(String authorityType) {
        this.authorityType = authorityType;
    }

    public List<String> getAuthorityApps() {
        return authorityApps;
    }

    public void setAuthorityApps(List<String> authorityApps) {
        this.authorityApps = authorityApps;
    }
}

新建UserController.java

@RestController
public class UserController {
    @Autowired
    private UserService userService;

    @PostMapping("/user/add")
    public Object addUser(User user) {
        System.out.println(user);
        return "CREATED";
    }

}

可以直接使用PostMan来模拟发送请求，

POST请求，发送JSON数据格式

新建PrivilegesController.java

@RestController
public class PrivilegesController {

    @Autowired
    private PrivilegesService privilegesService;
    @PostMapping("/privileges/add")
    public Object privilegesAdd(@RequestBody Privileges2 privileges2) {
        System.out.println(privileges2);
        return "success";
    }

}

Privileges.java

package cn.ac.iie.bean;

import java.util.List;

public class Privileges {

    private String userName;
    private String authorityType;
    private List<String> authorityApps;

    @Override
    public String toString() {
        return "Privileges{" +
                "userName='" + userName + '\'' +
                ", authorityType='" + authorityType + '\'' +
                ", authorityApps=" + authorityApps +
                '}';
    }

    public String getUserName() {
        return userName;
    }

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

    public String getAuthorityType() {
        return authorityType;
    }

    public void setAuthorityType(String authorityType) {
        this.authorityType = authorityType;
    }

    public List<String> getAuthorityApps() {
        return authorityApps;
    }

    public void setAuthorityApps(List<String> authorityApps) {
        this.authorityApps = authorityApps;
    }
}

bean中包含list，因此需要前端传递数组，后台可以通过spring的@RequestBody直接获取出对应的bean。

postman需要准备的：

选post请求
Headers中添加 key: Content-Type value:application/json
Body中选raw, JSON(application/json)
文本框中写入json参数

{
	"userName": "vincent",
	"authorityType": "mac",
	"authorityApps": ["1","2"]
}

这样后台就可以收到对象了