静态方法中注入Spring组件

• 工具类的静态方法
• • 代码

关键注解@PostConstruct
应为静态方法会先加载，@Autowired注解无法在此之前注入，所以如果在静态方法中直接使用taskInfoDao它是一个null值，所以需要使用@PostConstruct注解，此注解在@Autowired之后执行，在init方法中重新给Dao赋值即可

package com.timer.util;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Date;

import javax.annotation.PostConstruct;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DuplicateKeyException;
import org.springframework.stereotype.Component;

import com.dao.TaskInfoDao;
import com.entity.TaskInfo;


@Component
public class TaskUtil {
	private static TaskUtil taskUtil;
	
	private static final Logger LOGGER = LoggerFactory.getLogger(TaskUtil.class);

	@Autowired
	private TaskInfoDao taskInfoDao;
	
	@PostConstruct
    public void init(){
		taskUtil = this;
		taskUtil.taskInfoDao = this.taskInfoDao;
    }
	
	
	public static TaskInfo taskStart(String funName) {
		TaskInfo taskInfo = new TaskInfo();
		Date date = new Date();
		taskInfo.setFunName(funName);
		taskInfo.setFunNameLock(funName);
		taskInfo.setCreateTime(date);

		try {
			taskUtil.taskInfoDao.insert(taskInfo);
		} catch (Exception e) {
			LOGGER.error("插入数据失败");
			return null;
		}
		return taskInfo;
	}
	
}