問題說明 : 

在spring框架進行專案開發，平時遇到了需要批量處理的資料的時候，會選擇多執行緒進行資料批跑，但是會發現，啟動多執行緒後，執行緒會出現service或者mapper檔案注入失敗的問題，導致執行緒啟動失敗，其中bean的注入方式選擇的是spring常規的註解@Autowired進行注入

原因分析 :

web容器在啟動應用時，spring容器是無法感知多執行緒的那些bean的，所以多執行緒的bean類無法獲取spring容器的上下文，並不能通過@Autowired注入需要的bean

解決方案 :

執行緒中獲取bean

import org.springframework.context.ApplicationContext;
public class ServiceFactory {
	public static ApplicationContext context = null;
	public static Object getInstance(String serviceName) {
		if (null == context) {
			context = ApplicationContextLoaderListener.getApplicationContext();
		}
		return context.getBean(serviceName);
	}
}
 

public class CardThread extends Thread{
	@Autowired
	private FinanceCardDoMapper financeCardDoMapper;
	
	private Integer startIndex;
	private Integer endIndex;
	private List<FinanceCardDo> dataList;
	public CardThread(Integer startIndex ,Integer endIndex ,List<FinanceCardDo> dataList) {
		super();
		this.startIndex = startIndex; 
		this.endIndex = endIndex; 
		this.dataList = dataList; 
	}
	public void run(){
		financeCardDoMapper = (FinanceCardDoMapper)MyBatisConfig.getApplicationContext().getBean(FinanceCardDoMapper.class);
		for (FinanceCardDo financeCardDo : dataList) {
			if (financeCardDo.getIndex() > startIndex && financeCardDo.getIndex() <= endIndex) {
				financeCardDo.setCardNo(DesUtil.encrypt("dfsghjkl",financeCardDo.getCardNo()));
				financeCardDo.setBankMobile(DesUtil.encrypt("dfsghjkl",financeCardDo.getBankMobile()));
				financeCardDoMapper.updateByPrimaryKeySelective(financeCardDo);
				System.out.println("該使用者銀行卡更新完成：index：" + financeCardDo.getIndex());
			}
		}
	}
}