Java中的List转换成JSON报错（二）

1、错误描述

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactoryat net.sf.json.AbstractJSON.<clinit>(AbstractJSON.java:53)at com.you.model.ListToJSON.main(ListToJSON.java:29)Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactoryat 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)... 2 more

2、错误原因

/** * 将List转换成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<String> list = new ArrayList<String>();list.add("春天");list.add("夏天");list.add("秋天");list.add("冬天");JSONArray jsonArray = JSONArray.fromObject(list);System.out.println("List转换成JSON：" + jsonArray.toString());}}

从“Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory”可以看出，是缺少jar

3、解决办法

   将“commons-logging-1.1.3.jar”复制到lib下