spring中获取容器的方式
1.实现ApplicationContextAware接口
重写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.从Application 启动类直接将spring容器放入对象内
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显式注入,@Component是必须的,且该类必须与main同包或子包 // 若非同包或子包,则需手动import 注入,有没有@Component都一样 // 可复制到Test同包测试 public static void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if(SpringUtil.applicationContext == null){ SpringUtil.applicationContext = applicationContext; } //查询所有预警任务,开启的预警任务自动开启 RiskWarningTaskService riskWarningTaskServiceStatic=applicationContext.getBean(RiskWarningTaskService.class); List<EarlyWarningTask> earlyWarningTask = riskWarningTaskServiceStatic.findEarlyWarningTaskAll(); for (EarlyWarningTask warningTask : earlyWarningTask) { //如果任务是打开的,可就开启任务 if("1".equals(warningTask.getStat())){ riskWarningTaskServiceStatic.editState("1",warningTask.getId().toString(),warningTask.getTitle()); riskWarningTaskServiceStatic.editState("0",warningTask.getId().toString(),warningTask.getTitle()); } } } //获取applicationContext public static ApplicationContext getApplicationContext() { return applicationContext; } //通过name获取 Bean. public static Object getBean(String name){ return getApplicationContext().getBean(name); } //通过class获取Bean. public static <T> T getBean(Class<T> clazz){ return getApplicationContext().getBean(clazz); } //通过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); } }
/** * 启动嵌入式的Tomcat并初始化Spring环境 */ public static void main(String[] args) throws Exception { ApplicationContext app = SpringApplication.run(WebApplication.class, args); SpringUtil.setApplicationContext(app); }
建议使用第一种非常简单