解决多线程时Autowired自动注入null问题

待我称王封你为后i 2022-04-10 05:49 546阅读 0赞

在多线程时使用@Autowired总是获取不到bean，原因是：new thread不在spring容器中，也就无法获得spring中的bean对象。

解决方法：手动获取

package com.test.configs;  
   
import org.springframework.beans.BeansException;  
import org.springframework.context.ApplicationContext;  
import org.springframework.context.ApplicationContextAware;  
import org.springframework.stereotype.Component;  
   
@Component  
public class BeanContext implements ApplicationContextAware \{  
   
    private static ApplicationContext applicationContext;  
      
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException \{  
        BeanContext.applicationContext = applicationContext;  
    \}  
      
    public static ApplicationContext getApplicationContext()\{  
        return applicationContext;  
    \}  
      
    @SuppressWarnings("unchecked")  
    public static <T> T getBean(String name) throws BeansException \{  
        return (T)applicationContext.getBean(name);  
    \}  
      
    public static <T> T getBean(Class<T> clz) throws BeansException \{  
        return (T)applicationContext.getBean(clz);  
    \}  
\}  
创建thread

package com.test.handler;  
   
import com.test.configs.BeanContext;  
import com.test.service.TestService;  
import com.test.model.User;  
   
/\*\*  
 \* created by huguoju on 2017/11/13.  
 \*/  
public class TestHandler implements Runnable \{  
   
    private User user;  
    private TestService testService;  
    @Override  
    public void run() \{  
        this.testService= BeanContext.getApplicationContext().getBean(TestService.class);  
        User user=testService.queryUserById(11);  
    \}  
   
    public User getUser() \{  
        return user;  
    \}  
   
    public void setUser(User user) \{  
        this.user = user;  
    \}  
\}

在其他service里调用

ThreadFactory namedThreadFactory = new ThreadFactoryBuilder().setNameFormat("upFinancial-pool-%d").build();  
            ExecutorService pool = new ThreadPoolExecutor(corePoolSize, maxPoolSize,  
                    6000L, TimeUnit.MILLISECONDS,  
                    new LinkedBlockingDeque<Runnable>(1024), namedThreadFactory, new ThreadPoolExecutor.AbortPolicy());  
            UpFinancialContractHandler handler=new UpFinancialContractHandler();  
            handler.setUser(user);  
            pool.execute(handler);

原文：https://blog.csdn.net/u011493599/article/details/78522315