NoClassDefFoundError: org/json/JSONException解决方法

最近在学习使用json传输数据，于是便下载了org.json.jar包

代码编写完后编译器并没有显示任何错误，可是启动tomcat服务器时却总是失败

显示错误如下：

A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/controller]]
at java.util.concurrent.FutureTask.report(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:917)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:871)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/controller]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
... 6 more

Caused by: java.lang.NoClassDefFoundError: org/json/JSONException

解决方法为将org.json.jar包复制到tomcat的lib目录中，我的目录是：

D:\Program Files (x86)\Apache Software Foundation\Tomcat 8.0\lib