前些天發現了一個巨牛的人工智能學習網站,通俗易懂,風趣幽默,忍不住分享一下給大家。點擊跳轉到教程。
1. 啟動工程失敗,報錯如題:
A component required a bean of type 'gentle.test.Show' that could not be found.
2. 原因:有一個被我注入其它類的?業務類上沒有給注解:@service 。
PS:還有2種原因1) 要求 service 和 controller 需要在同一個包下 。2)有可能沒有引入依賴的服務bean。( 此條來自評論中好心網友的分享。)
此類沒有在類上給注解:
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);@Overridepublic void execute(JobExecutionContext arg0) throws JobExecutionException {_log.info("\n\n-------------------------------\n " +"It is running and the time is : " + new Date()+"\n-------------------------------\n");}}
?在此類注入了上面那個類 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());@ResourceSchedulerTest test;@ResourceShow show;public void cronDepartmentsAndUsersJob() {logger.info("\n\n 定時--開始,當前時間: " + dateFormat().format(new Date()));
// test.addJob();try {show.execute(null);} catch (JobExecutionException e) {e.printStackTrace();}logger.info("\n\n 定時--結束,當前時間:" + dateFormat().format(new Date()));}private SimpleDateFormat dateFormat() {return new SimpleDateFormat("HH:mm:ss");}
}
3.解決,在 Show 類上加上 service 注解 。
改為:
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);@Overridepublic void execute(JobExecutionContext arg0) throws JobExecutionException {_log.info("\n\n-------------------------------\n " +"It is running and the time is : " + new Date()+"\n-------------------------------\n");}}
4. 啟動并運行定時任務正常:
?