详解SpringBoot 多线程处理任务 无法@Autowired注入bean问题解决

在多线程处理问题时，无法通过@Autowired注入bean，报空指针异常，

在线程中为了线程安全，是防注入的，如果要用到这个类，只能从bean工厂里拿个实例。

解决方法如下：

1.创建一个工具类代码：

package com.hqgd.pms.common;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;



@Component
public class SpringContextUtil implements ApplicationContextAware {
  
  private static ApplicationContext applicationContext;

  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    SpringContextUtil.applicationContext = applicationContext;
  }

  
  public static ApplicationContext getApplicationContext() {
    return applicationContext;
  }

  
  public static Object getBean(String name) {
    return getApplicationContext().getBean(name);
  }

  
  public static  T getBean(Class clazz) {
    return getApplicationContext().getBean(clazz);
  }

  
  public static  T getBean(String name, Class clazz) {
    return getApplicationContext().getBean(name, clazz);
  }
}

2.使用方法

@Slf4j
@Service
public class SerialPortService {
  public static SerialPort mSerialport = null;
//  private SimpMessagingTemplate simpMessage;
  private DataAcquisitionService das;
  private SystemService systemService;
  private SysParamMapper sysParamMapper;

  public SerialPortService() {
    this.das = SpringContextUtil.getBean(DataAcquisitionService.class);
    this.systemService = SpringContextUtil.getBean(SystemService.class);
    this.sysParamMapper = SpringContextUtil.getBean(SysParamMapper.class);
  }

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。