一个基于ajax和java缓存的聊天室

package com.jandn.media.action; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.Iterator; import java.util.List; import java.util.Map; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; public class Json { private boolean isadsT = true; public boolean isIsadsT() { return isadsT; } public void setIsadsT(boolean isadsT) { this.isadsT = isadsT; } public static Object getJson(Object obj) throws JSONException{ //处理Map if(obj instanceof Map){ JSONObject jObj = new JSONObject(); Map map = (Map)obj; Iterator it = map.keySet().iterator(); for (; it.hasNext();) { String key = it.next().toString(); if(map.get(key) instanceof String){ jObj.put(key,map.get(key)); }else{ jObj.put(key,getJson(map.get(key))); } } return jObj; } //处理DTO if(obj instanceof ChatDTO){ JSONObject jObj = new JSONObject(); Class cla = obj.getClass(); Field[] f = cla.getDeclaredFields(); for (int i = 0; i < f.length; i++) { Method method = null; String key = f[i].getName(); String upperKey = key.substring(0,1).toUpperCase()+key.substring(1); String value = ""; //可能是get方法 try { method = cla.getDeclaredMethod("get"+upperKey, null); } catch (SecurityException e) { e.printStackTrace(); } catch (NoSuchMethodException e) { //没有找到get方法不管继续找is方法 } //可能是is方法 try { method = cla.getDeclaredMethod("is"+upperKey, null); } catch (SecurityException e) { e.printStackTrace(); } catch (NoSuchMethodException e) { //没有找到is方法依然不管,这个method现在为null; } try { //如果上面两个都没有找到,说明该字段不存在get或is方法,不是javaBean标准格式. if(method != null){ value = String.valueOf(method.invoke(obj, null)); jObj.put(key, value); } } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } } return jObj; } //处理List if(obj instanceof List){ JSONArray jList = new JSONArray(); List list = (List)obj; Iterator it = list.iterator(); for (; it.hasNext();) { Object _obj = it.next(); jList.put(getJson(_obj)); } return jList; } return null; } }