Spring启动报错问题之注解@RequiredArgsConstructor

关于类添加注解@RequiredArgsConstructor 导致@Autowired注入找不到实例问题

报错：

Exception encountered during context initialization - cancelling refresh attempt: 
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 
'studentServiceImpl' defined in file [D:\Desktop\2021-0125\syh-
test\target\classes\com\service\student\StudentServiceImpl.class]: Unsatisfied dependency 
expressed through constructor parameter 0; nested exception is 
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name
'workServiceImpl': Unsatisfied dependency expressed through field 'service'; nested exception
is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean 
with name 'studentServiceImpl': Requested bean is currently in creation: Is there an 
unresolvable circular reference?

创建WorkService 是注入的StudentService无法找到实例

@RequiredArgsConstructor注解导致

service–StudentService

package com.service.student;

/**
 * @author syh
 * @date 2023/7/19 11:07
 * 描述
 */

public interface StudentService {


    void test();
}

package com.service.student;

import com.service.play.PlayService;
import com.service.work.WorkService;
import lombok.RequiredArgsConstructor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author syh
 * @date 2023/7/19 11:08
 * 描述
 */

@Service
@RequiredArgsConstructor
//@RequiredArgsConstructor(onConstructor_ = {@Lazy}) 此方法可解决无法注入问题
public class StudentServiceImpl implements StudentService {
	//因为这样会变成成员变量导致空参构造消失注入失败（可以new一下试试）
    //使用AutoWirte 则不会记录为变量 仍然为空参构造
    private final WorkService workService;  

    @Override
    public void test() {

    }
}

service–WorkService

/**
 * @ author:syh
 * date:2023/7/19 11:09
 * 描述：
 **/
public interface WorkService {
}

package com.service.work;

import com.service.student.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author syh
 * @date 2023/7/19 11:09
 * 描述
 */
@Service
public class WorkServiceImpl implements WorkService {


    @Autowired  
    //@Lazy  加上这个注解就不会有注入问题，最后Spring会创建StudentService实例，使用不受影响
    StudentService service;

}

解决方案：

1.不使用@RequiredArgsConstructor 注解，使用@AutoWirte 注入使用

2.在注入的StudentService  加上懒加载

3.@RequiredArgsConstructor(onConstructor_ = {@Lazy})