在学习web后端开发基础知识时,遇到了springboot3 lombok不生效,启动报错的问题:

User:

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.time.LocalDateTime;

/**
 * 封装用户信息
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private Integer id;
    private String username;
    private String password;
    private String name;
    private Integer age;
    private LocalDateTime updateTime;
}

UserCOntroller

package com.example.controller;

import cn.hutool.core.io.IoUtil;
import com.example.pojo.User;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@RestController
public class UserController {

    @RequestMapping("/list")
    public List<User>list(){
        //1.加载并读取文件
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("user.txt");
        ArrayList<String> lines = IoUtil.readLines(in, StandardCharsets.UTF_8, new ArrayList<>());

        //2.解析数据，封装成对象 --> 集合
        List<User> userList = lines.stream().map(line -> {
            String[] parts = line.split(",");
            Integer id = Integer.parseInt(parts[0]);
            String username = parts[1];
            String password = parts[2];
            String name = parts[3];
            Integer age = Integer.parseInt(parts[4]);
            LocalDateTime updateTime = LocalDateTime.parse(parts[5], DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));

            return new User(id, username, password, name, age, updateTime);
        }).collect(Collectors.toList());

       
        return userList;
    }

}

项目启动时报错:

java: 无法将类 com.example.pojo.User中的构造器 User应用到给定类型;
  需要: 没有参数
  找到:    java.lang.Integer,java.lang.String,java.lang.String,java.lang.String,java.lang.Integer,java.time.LocalDateTime
  原因: 实际参数列表和形式参数列表长度不同

经过验证测试,不知道什么原因导致lombok无法正常启动,改成手动添加getter,setter和构造器后问题解决.

package com.example.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.time.LocalDateTime;

/**
 * 封装用户信息
 */

public class User {
    private Integer id;
    private String username;
    private String password;
    private String name;
    private Integer age;
    private LocalDateTime updateTime;

    public User(Integer age, String username, LocalDateTime updateTime, String password, String name, Integer id) {
        this.age = age;
        this.username = username;
        this.updateTime = updateTime;
        this.password = password;
        this.name = name;
        this.id = id;
    }

    public Integer getAge() {
        return age;
    }

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

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getPassword() {
        return password;
    }

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

    public LocalDateTime getUpdateTime() {
        return updateTime;
    }

    public void setUpdateTime(LocalDateTime updateTime) {
        this.updateTime = updateTime;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }


}

之后查找网上解决方案,发现新版springboot有这个插件

image-20250223155645087

只需要加上一行,指定改lombok版本即可

image-20250223155742321