动态json

import java.lang.reflect.Field;

import java.util.ArrayList;

import java.util.List;

import net.sf.json.JSONArray;

import net.sf.json.JSONObject;

public class JsonUtil {

private static final String DATAS = "datas";

private static final String NUMBER = "number";

public static String getJson(List<Object> objList, JSONObject temp,

Class cl,String name) {

JSONArray jsonArray = new JSONArray();

for (Object obj : objList) {

if (temp == null) {

temp = new JSONObject();

}

Field fields[] = obj.getClass().getDeclaredFields();

for (int i = 0; i < fields.length; i++) {

 

String fieldname = fields[i].getName();

Object returnvalue = null;

try {

returnvalue = obj.getClass().getMethod(

"get" + fieldname.substring(0, 1).toUpperCase()

+ fieldname.substring(1), new Class[] {})

.invoke(obj, new Object[] {});

 

if (returnvalue != null) {

if (!returnvalue.getClass().getPackage().getName()

.equals(obj.getClass().getPackage().getName())) {

if (fields[i].getAnnotation(cl) != null) {

temp.put(name+obj.getClass().getSimpleName() + fieldname, returnvalue);

}

} else {

List<Object> objectlist = new ArrayList<Object>();

objectlist.add(returnvalue);

Field[] retfields = returnvalue.getClass()

.getDeclaredFields();

for (int j = 0; j < retfields.length; j++) {

;

if (retfields[j].getAnnotation(cl) != null) {

getJson(objectlist, temp,

cl,name+obj.getClass().getSimpleName());

}

}

}

 

}

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

 

jsonArray.add(temp);

}

 

JSONObject jsonobj = new JSONObject();

jsonobj.put(DATAS, jsonArray);

 

return jsonobj.toString();

}

 

}