📄 messageservice.java
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package com.ajaxlab.ajax;
import java.text.SimpleDateFormat;
import java.util.*;
public class MessageService {
private Map messages;
public MessageService() {
messages = new HashMap();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Message message1 = new Message("24","","jane_wu","educhina", sdf. format(Calendar.getInstance().getTime()),"","
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