SpringBoot我想把服务层一个功能抽成工具类，但是一直保存null

Question

首先我希望是一个静态的方法，但是earlyWarningService会变红

然后我把static去掉，查询为null

package com.bulldozer.utils;

import com.bulldozer.entity.EarlyWarning;
import com.bulldozer.service.EarlyWarningService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;

@Component
public class AbnormalTaskUtil {

    @Autowired
    private EarlyWarningService earlyWarningService;

    public void static beginEarlyWarning() {

        List<EarlyWarning> listEarlyWarning = earlyWarningService.selectEarlyWarningCount("ASC");

        for(EarlyWarning earlyWarningCount: listEarlyWarning) {

//            int countExisted = earlyWarningService.selectEarlyWarningIsExisted(earlyWarning.getLicenseNumber());
            List<EarlyWarning> listEarlyWarningSelected = earlyWarningService.selectEarlyWarningByLicenseNumber(earlyWarningCount.getLicenseNumber());

            if(listEarlyWarningSelected.size() == 0) {

                if(earlyWarningCount.getEntryCount() != earlyWarningCount.getLeaveCount()) {
                    earlyWarningCount.setWarningType("出入次数异常");
                } else {
//                    earlyWarning.setWarningType("");
                    earlyWarningCount.setFlagDelete(1);
                }

                System.out.println(earlyWarningCount.toString());
                earlyWarningService.insertEarlyWarning(earlyWarningCount);
            } else {
                EarlyWarning earlyWarningSelected = listEarlyWarningSelected.get(0);

                if(earlyWarningCount.getLeaveCount() != earlyWarningCount.getEntryCount()) {
//                    earlyWarningSelected.get(0).setFlagDelete(1);

                    earlyWarningSelected.setLeaveCount(earlyWarningCount.getLeaveCount());
                    earlyWarningSelected.setEntryCount(earlyWarningCount.getEntryCount());
                    earlyWarningSelected.setWarningType("出入次数异常");
                    earlyWarningSelected.setFlagDelete(0);

                    if(earlyWarningSelected.getFlagDelete() == 0) {

                    } else {
                        earlyWarningSelected.setWarningTimeStr("current");
                    }

                    System.out.println("异常earlyWarningCount == " + earlyWarningCount.toString());
                    System.out.println("异常earlyWarningSelected == " + earlyWarningSelected.toString());

                } else {
//                    System.out.println("正常的earlyWarningCount == " + earlyWarningCount.toString());
                    earlyWarningSelected.setFlagDelete(1);
                }

                earlyWarningService.updateEarlyWarningByIdAndLicenseNumber(earlyWarningSelected);
            }

        }
    }
}

外加问一下

我一个接口和一个定时器都需要使用这个方法

请问这个方法我怎么抽出来共用

Answer 1

老哥你这基础，讲道理 真的拉跨 - -
静态方法你使用非静态变量，能不报错嘛？这是第一个
如果autowrite修饰的是静态类的时候，是注入不成功的！直接将autowrite注解写到set方法上面，就会给你注入了，不过推荐自己去实现ApplicationContextAware，这样你都能在非容器管理的不同类，获取到applicationcontext，简介获取到所有的bean