我将解释逻辑：我正在读取一个xml文件，其中包含许多soap格式的请求和响应，然后我将请求和响应存储在两个哈希Map中。在第一个哈希Map中，我将事务id（unique）存储为键，将值存储为请求时间til name。在第二个哈希Map中，我将事务id（unique）存储为键，将值存储为响应时间。在两个hashMap中，键是相同的，但是值是不同的，通过使用for循环迭代两个循环，我需要得到响应时间和请求时间之间的时间差，例如：requesttime:2020-01-30t11：07:08.351z和响应time:2020-01-30t11：07:10.152赫兹

public class MapTimeDiff {
public static void main(String[] args) throws ParseException {

File file =new File("C:\\Users\\gsanaulla\\Documents\\My Received Files\\ecarewsframework.xml");
        Scanner in = null;
        String tilname = null;
        String transactionId = null;
        String requesttime = null;
        String responsetime = null;
        Date dateOne = null;
        Date dateTwo = null;
        double timeDiff;
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS");
        Map<String,ArrayList<String>> request=new HashMap<String,ArrayList<String>>(); 
          ArrayList<String> req=new ArrayList<String>();
        Map<String,ArrayList<String>> response=new HashMap<String,ArrayList<String>>(); 
        ArrayList<String> res=new ArrayList<String>();
        try {
            in = new Scanner(file);
            while(in.hasNext())
                {
                String line=in.nextLine();
                if(line.contains("</S:Envelope>")) {
                    System.out.println(line);

                    tilname=line.split("StartRecord><")[1].split("><")[0].split(":")[1];
                    System.out.println("tilname :: "+tilname);
                    transactionId = line.split("transactionId>")[1].split("<")[0];
                    System.out.println("transactio id :: "+transactionId);
                    requesttime=line.split("sourceTimestamp>")[1].split("<")[0];
                    System.out.println("request time is :: "+requesttime);
                    dateOne = df.parse(requesttime);

                }
                req.add(tilname);
                req.add(dateOne.toString());
                System.out.println("req is==== " +req);
                request.put(transactionId,req);
                System.out.println("request is==== " +request.get(transactionId));
                    if(line.contains("</SOAP-ENV:Envelope>")) {
                        //System.out.println(line);

                          if(line.contains("transactionId")) 
                          { 
                              responsetime=line.split("sourceTimestamp>")[1].split("<")[0];
                              transactionId = line.split("transactionId>")[1].split("<")[0];
                              System.out.println("responsetime :: "+responsetime); 
                              System.out.println("transaction id "+transactionId);
                              dateTwo = df.parse(responsetime);

                          }
                          res.add(dateTwo.toString());
                          System.out.println("res is===== "+res);
                          response.put(transactionId,res);
                          System.out.println("response is===== "+response.get(transactionId));
                        for (Entry<String, ArrayList<String>> entry : request.entrySet()) {
                              for (Entry<String, ArrayList<String>> entry1 : response.entrySet()) {
                             System.out.println("Key = " + entry.getKey() + 
                                         ", Value = " + entry.getValue());
                              System.out.println("Key = " + entry1.getKey() + 
                                         ", Value = " + entry1.getValue());
                                  if(request.keySet().equals(response.keySet())) {
                                      timeDiff = (dateTwo.getTime() - dateOne.getTime());
                                  }
                          }
                          } 
}
      }             
        }

           catch (FileNotFoundException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
                 }   

    }

}