Convert POJO to JSON

Face this issue many times.

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class POJO2JSON {
 
 public static JSONArray convert(Class cls, List list) {
  
  Method[] methods = cls.getDeclaredMethods();
  
  String className = cls.getSimpleName();
  className = className.substring(0,1).toLowerCase() + className.substring(1);

  JSONArray jsonarray = new JSONArray();
  for (Object object : list) {
   JSONObject json = new JSONObject();
   
   for (Method method : methods) {
    if(method.getName().startsWith("get")) {
     String fieldName = method.getName().substring(3);
     fieldName = fieldName.substring(0,1).toLowerCase() + fieldName.substring(1);
     
     try {
      Object result = method.invoke(object, null);
//      System.out.println(fieldName + " = " + result);
      json.put(fieldName, result);
     } catch (IllegalArgumentException e) {
      e.printStackTrace();
     } catch (IllegalAccessException e) {
      e.printStackTrace();
     } catch (InvocationTargetException e) {
      e.printStackTrace();
     } catch (JSONException e) {
      e.printStackTrace();
     }
    }
   }
   jsonarray.put(json);
  }
  return jsonarray;
 }
 
 public static JSONObject convert(Class cls, Object obj) {


  Method[] methods = cls.getDeclaredMethods();
  
  String className = cls.getSimpleName();
  className = className.substring(0,1).toLowerCase() + className.substring(1);
  
  JSONObject json_class = new JSONObject();
  
  JSONObject json = new JSONObject();
  
  for (Method method : methods) {
   if(method.getName().startsWith("get")) {
    String fieldName = method.getName().substring(3);
    fieldName = fieldName.substring(0,1).toLowerCase() + fieldName.substring(1);
    
    try {
     Object result = method.invoke(obj, null);
//     System.out.println(fieldName + " = " + result);
     json.put(fieldName, result);
    } catch (IllegalArgumentException e) {
     e.printStackTrace();
    } catch (IllegalAccessException e) {
     e.printStackTrace();
    } catch (InvocationTargetException e) {
     e.printStackTrace();
    } catch (JSONException e) {
     e.printStackTrace();
    }
   }
  }
  try {
   json_class.put(className, json);
  } catch (JSONException e) {
   e.printStackTrace();
  }
  return json;
 }
}

See http://www.json.org/java/ for JSONObject