解决报错 ：A component required a bean of type 'gentle.test.Show' that could not be found

1. 启动工程失败，报错如题：

A component required a bean of type 'gentle.test.Show' that could not be found.

2. 原因：有一个被我注入其它类的 业务类上没有给注解：@service 。

（PS：还有一种情况为要求 service 和 controller 需要在同一个包下 。）

此类没有在类上给注解：

package gentle.test;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Date;

/**
 * @author silence
 * @date 2018/7/17 11:37
 */
public class Show implements Job {


    private static Logger _log = LoggerFactory.getLogger(Show.class);

    @Override
    public void execute(JobExecutionContext arg0) throws JobExecutionException {

        _log.info("\n\n-------------------------------\n " +
                "It is running and the time is : " + new Date()+
                "\n-------------------------------\n");
    }

}

 在此类注入了上面那个类 Show ：

package gentle.test;

import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.Resource;
import java.text.SimpleDateFormat;
import java.util.Date;


public class UserSyncTask {

    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    @Resource
    SchedulerTest test;
    @Resource
    Show show;


    public void cronDepartmentsAndUsersJob() {

        logger.info("\n\n 定时--开始，当前时间： " + dateFormat().format(new Date()));
//        test.addJob();

        try {
            show.execute(null);
        } catch (JobExecutionException e) {
            e.printStackTrace();
        }
        logger.info("\n\n 定时--结束，当前时间：" + dateFormat().format(new Date()));
    }

    private SimpleDateFormat dateFormat() {
        return new SimpleDateFormat("HH:mm:ss");
    }
}

3.解决，在 Show 类上加上 service 注解 。

改为：

package gentle.test;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import java.util.Date;

/**
 * @author silence
 * @date 2018/7/17 11:37
 */
@Service("show")
public class Show implements Job {


    private static Logger _log = LoggerFactory.getLogger(Show.class);

    @Override
    public void execute(JobExecutionContext arg0) throws JobExecutionException {

        _log.info("\n\n-------------------------------\n " +
                "It is running and the time is : " + new Date()+
                "\n-------------------------------\n");
    }

}

4. 启动并运行定时任务正常：