List转换成JSON对象报错（四）

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List转换成JSON对象

1、具体错误如下

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ListOrderedMapat net.sf.json.JSONObject.<init>(JSONObject.java:1603)at net.sf.json.util.CycleDetectionStrategy.<clinit>(CycleDetectionStrategy.java:37)at net.sf.json.JsonConfig.<clinit>(JsonConfig.java:65)at net.sf.json.JSONArray.addAll(JSONArray.java:1255)at com.you.file.upload.util.ListToJSON.main(ListToJSON.java:49)Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.map.ListOrderedMapat java.net.URLClassLoader$1.run(Unknown Source)at java.net.URLClassLoader$1.run(Unknown Source)at java.security.AccessController.doPrivileged(Native Method)at java.net.URLClassLoader.findClass(Unknown Source)at java.lang.ClassLoader.loadClass(Unknown Source)at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)at java.lang.ClassLoader.loadClass(Unknown Source)... 5 moreException in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ListOrderedMapat net.sf.json.JSONObject.<init>(JSONObject.java:1603)at net.sf.json.util.CycleDetectionStrategy.<clinit>(CycleDetectionStrategy.java:37)at net.sf.json.JsonConfig.<clinit>(JsonConfig.java:65)at net.sf.json.JSONArray.addAll(JSONArray.java:1255)at com.you.file.upload.util.ListToJSON.main(ListToJSON.java:49)Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.map.ListOrderedMapat java.net.URLClassLoader$1.run(Unknown Source)at java.net.URLClassLoader$1.run(Unknown Source)at java.security.AccessController.doPrivileged(Native Method)at java.net.URLClassLoader.findClass(Unknown Source)at java.lang.ClassLoader.loadClass(Unknown Source)at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)at java.lang.ClassLoader.loadClass(Unknown Source)... 5 more

2、错误原因

lib目录中未导入commons-collections-3.1.jar

3、解决办法

向WEB-INF目录下的lib目录导入commons-collections-3.1.jar