java - @Autowired 不适用于从非 spring jpos 库实现的类

Question

我在 Spring Boot 应用程序中使用带有事务管理器的 jpos Q2 Server，但是当我尝试在从 Jpos TransactionParticipant 接口(interface)实现的类中实现 DI 时，它给了我空指针异常。

根据我的理解，我已经尝试了 IoC Spring Boot 中可能存在的所有选项。看来 TransactionParticipant 第三方库我无法在 Spring IoC/DI 模块中注册它。

package com.fonepay.iso;

@Service("processIsoTxn")
public class ProcessIsoTxn implements TransactionParticipant{
@Autowired
    private CbsTxnService cbsTxnService;

    @Override
    public int prepare(long id, Serializable context) {
        Context ctx = (Context) context;
        try{

            ISOMsg request = (ISOMsg) ctx.get("REQUEST");

            //Call local processing Message
            //CbsTxnService cbsTxnService = new CbsTxnServiceImpl();
            ISOMsg response = cbsTxnService.createFinancialTxn(request);

            ctx.put("RESPONSE", response);
            return PREPARED;

        }catch(Exception ex){
            System.out.println("Process Iso Txn | error | "+ex);
        }

        return 0;
    }
}

package com.fonepay.service.impl;

@Service("cbsTxnService")
@Transactional
public class CbsTxnServiceImpl implements CbsTxnService{
     public ISOMsg createFinancialTxn(ISOMsg isoMsg) {...}
}

@SpringBootApplication
@ComponentScan("com.fonepay")
@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
public class JposserverApplication {

    public static void main(String[] args) {
        SpringApplication.run(JposserverApplication.class, args);
    }
}

我不断收到 java.lang.NullPointerException 异常ISOMsg 响应 = cbsTxnService.createFinancialTxn(request);

Answer 1

• 试试这个，替换@Autowired注释
• 尝试使用构造函数

@Service("processIsoTxn")
public class ProcessIsoTxn implements TransactionParticipant{

 private CbsTxnService cbsTxnService;

  public ProcessIsoTxn (CbsTxnService cbsTxnService) {
    this.cbsTxnService = cbsTxnService;
  }