자바 의 List 를 JSON 오류 로 변환(1)

1.오류 설명

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at com.you.model.ListToJSON.main(ListToJSON.java:29)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	... 13 more

2.잘못된 원인

/**
 *  List   JSON
 */
package com.you.model;

import java.util.ArrayList;
import java.util.List;

import net.sf.json.JSONArray;

/**
 * @author YouHaiDong
 *
 */
public class ListToJSON 
{

	/**
	 * @param args
	 */
	public static void main(String[] args) 
	{
		List list = new ArrayList();
		list.add("  ");
		list.add("  ");
		list.add("  ");
		list.add("  ");
		
		JSONArray jsonArray = JSONArray.fromObject(list);
		
		System.out.println("List   JSON：" + jsonArray.toString());
	}

}

Jar 가방 이 없습니다.
3.해결 방법
   lib 에"commons-lang-2.4.jar"를 복사 합 니 다.