spring中獲取容器的方式

1.實現ApplicationContextAware接口

重寫setApplicationContext 方法  添加@Component 注解

@Component
public class VipSolverChooser implements ApplicationContextAware {
    private Map<String, AbstractVipSolver> chooseMap = new HashMap<>();
    private ApplicationContext context;

    public AbstractVipSolver choose(String type) {
        return chooseMap.get(type);
    }

    @PostConstruct
    public void register() {
        Map<String, AbstractVipSolver> solverMap = context.getBeansOfType(AbstractVipSolver.class);
        for (AbstractVipSolver solver : solverMap.values()) {
            for (String support : solver.supports()) {
                chooseMap.put(support, solver);
            }
        }
    }
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.context = applicationContext;
    }
}

　　

2.從Application 啟動類直接將spring容器放入對象內

package com.yssoft.fs.supervise.utils;

import com.yssoft.fs.repository.entity.comm.EarlyWarningTask;
import com.yssoft.fs.supervise.service.riskWarning.RiskWarningTaskService;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;

import javax.annotation.Resource;
import java.util.List;

public class SpringUtil  {

    private static ApplicationContext applicationContext = null;
// 非@import顯式注入，@Component是必須的，且該類必須與main同包或子包
    // 若非同包或子包，則需手動import 注入，有沒有@Component都一樣
    // 可復制到Test同包測試

    public static void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if(SpringUtil.applicationContext == null){
            SpringUtil.applicationContext  = applicationContext;
        }
        //查詢所有預警任務,開啟的預警任務自動開啟
        RiskWarningTaskService riskWarningTaskServiceStatic=applicationContext.getBean(RiskWarningTaskService.class);
        List<EarlyWarningTask> earlyWarningTask = riskWarningTaskServiceStatic.findEarlyWarningTaskAll();
        for (EarlyWarningTask warningTask : earlyWarningTask) {
            //如果任務是打開的,可就開啟任務
            if("1".equals(warningTask.getStat())){
                riskWarningTaskServiceStatic.editState("1",warningTask.getId().toString(),warningTask.getTitle());
                riskWarningTaskServiceStatic.editState("0",warningTask.getId().toString(),warningTask.getTitle());
            }
        }
    }

    //獲取applicationContext
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    //通過name獲取 Bean.
    public static Object getBean(String name){
        return getApplicationContext().getBean(name);

    }

    //通過class獲取Bean.
    public static <T> T getBean(Class<T> clazz){
        return getApplicationContext().getBean(clazz);
    }

    //通過name,以及Clazz返回指定的Bean
    public static <T> T getBean(String name,Class<T> clazz){
        return getApplicationContext().getBean(name, clazz);
    }

}

　　

/**
     * 啟動嵌入式的Tomcat並初始化Spring環境
     */
    public static void main(String[] args) throws Exception {
        ApplicationContext app = SpringApplication.run(WebApplication.class, args);
        SpringUtil.setApplicationContext(app);
    }

　　

建議使用第一種非常簡單