springboot中非Controller调用service报空指针异常

package com.justsy.utils;

import javax.annotation.PostConstruct;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import com.justsy.entity.Patrol;
import com.justsy.service.Potrol_Service;

@Component //将工具类声明为spring组件
public class TestUtils {
	@Autowired
	private Potrol_Service pService;
	//静态初使化当前类
	public static TestUtils testUtils;
	@PostConstruct
	public void init() {
		testUtils = this;
		testUtils.pService = this.pService;
	}
	//utils工具类中使用service或mapper接口的方法例子
	public static void test(Patrol patral) {
		testUtils.pService.addPatrol(patral);
	}
}

非controller调用

private void saveData() {
        //LOGGER.info("{}条数据，开始存储数据库！", list.size());
        for (Patrol patral : list) {
			TestUtils.test(patral);
		}
        LOGGER.info("{}条数据存储成功！",list.size());
    }

成功调用:

2019-10-15 16:58:47.090 DEBUG 92676 --- [io-8080-exec-14] c.j.mapper.Patrol_Mapper.insertPatrol    : ==>  Preparing: INSERT INTO justsafe_patrol ( project_id, net_info_id, patrol_time, cpu_usage_rate, ram_usage_rate, disk_Usage_Rate, disk_Home_Usage_Rate, nginx_http, nginx_https, nginx_Download, push ) values( ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ? ) 
2019-10-15 16:58:47.093 DEBUG 92676 --- [io-8080-exec-14] c.j.mapper.Patrol_Mapper.insertPatrol    : ==> Parameters: 1(Integer), 1000002(Integer), 2019-03-06 00:00:00.0(Timestamp), 11.0(Double), 22.0(Double), 33.0(Double), 44.0(Double), 55(Integer), 66(Integer), 77(Integer), 88(Integer)
2019-10-15 16:58:47.093 DEBUG 92676 --- [io-8080-exec-14] c.j.mapper.Patrol_Mapper.insertPatrol    : <==    Updates: 1
2019-10-15 16:58:47.093  INFO 92676 --- [io-8080-exec-14] c.j.utils.easyexcel.DemoDataListener     : 1条数据存储成功！
2019-10-15 16:58:47.094  INFO 92676 --- [io-8080-exec-14] c.j.utils.easyexcel.DemoDataListener     : 数据解析与存储操作已完成