Question

我有一个项目，该项目从mongodb读取并将该信息发送到队列。我的听众从云中接收队列消息。我能够创建一个.txt文件，从队列中输入所有信息。我一直在寻找的问题是：如何对POJO（IBusiness1，IBusiness2，IBusiness3）中的特定字段进行排序并为每个字段创建文件？以下代码仅允许我创建1个txt文件，并且不对字段进行排序：

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

    private class MessageHandler implements IMessageHandler {
        private final Logger logger = LoggerFactory.getLogger(MessageHandler.class);

        public CompletableFuture<Void> onMessageAsync(IMessage message) {
            System.out.println("received "+message.getBody());
            ObjectMapper om = new ObjectMapper();
            PortalList auditList = null;

            try {
                auditList = om.readValue( message.getBody(), PortalList.class );
                System.out.println( "**Audit Message   " + auditList );
                logger.info( "Creating file");
                String exportFilePath = "C:\\filewriter\\IBusiness1 " + 
                LocalDateTime.now().format(formatter) + ".txt";
                File file = new File(exportFilePath);
                FileWriter writeToFile = new FileWriter(file);
                String exportFileHeader = "CREATE_DTTM|FNAME|LNAME|IBusiness";
                StringHeaderWriter headerWriter = new 
                StringHeaderWriter(exportFileHeader);
                writeToFile.write(exportFileHeader);
                writeToFile.write( String.valueOf( headerWriter));
                writeToFile.write( String.valueOf(auditList));
                writeToFile.flush();

            } catch (IOException e) {
                e.printStackTrace();
            }

//          System.out.println(auditList);
            return CompletableFuture.completedFuture(null);
        }

Answer 1

这是我所做的：

PaymentPortalBean = POJO auditlist = PPB的本地副本

PortalList =

    import lombok.Data;

import java.util.List;

@Data
public class PortalList{

    private List<PaymentPortalBean> portalList;
}

创建文件的答案：

         for(PaymentPortalBean bean: auditList.getPortalList()) {
                if(bean.RxBusiness().contains( "IBusiness")){
                    File file = new File( exportFilePath );
                    FileWriter writeToFile = new FileWriter( file );
                    String exportFileHeader = CREATE_DTTM|FNAME|LNAME|IBusiness";
                    writeToFile.write( exportFileHeader );
                    writeToFile.write( String.valueOf(bean));
                    writeToFile.flush();
                }

为了找到IBusiness，我为所需的类型又创建了两个条件语句。运行良好。 Mongo db能够分隔我所需的字段。

收到队列消息后创建多个文件

1 个答案: