List转换成JSON对象报错（一）

最新推荐文章于 2025-11-29 03:46:46 发布

最新推荐文章于 2025-11-29 03:46:46 发布 · 145 阅读

文章标签：

#json #javascript #java #ViewUI

本文详细解析了在Java程序运行时出现的NoClassDefFoundError异常，原因在于缺少commons-lang-2.4.jar依赖库。通过在WEB-INF下的lib目录导入该依赖，成功解决了程序无法加载特定类的问题。

List转换成JSON对象

1、具体报错如下

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(Unknown Source)
	at java.security.SecureClassLoader.defineClass(Unknown Source)
	at java.net.URLClassLoader.defineClass(Unknown Source)
	at java.net.URLClassLoader.access$100(Unknown Source)
	at 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)
	at com.you.file.upload.util.ListToJSON.main(ListToJSON.java:48)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException
	at 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)
	... 13 more

2、错误原因

lib目录下未导入commons-lang-2.4.jar

3、解决办法

在WEB-INF下的lib目录下导入commons-lang-2.4.jar