错误描述：

严重: Servlet.service() for servlet [springmvc] in context with path [/] threw exception [Handler processing failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/collections/map/ListOrderedMap] with root cause
java.lang.ClassNotFoundException: org.apache.commons.collections.map.ListOrderedMap
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1858)
	at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1701)
	at net.sf.json.JSONObject.<init>(JSONObject.java:1450)
	at net.sf.json.util.CycleDetectionStrategy.<clinit>(CycleDetectionStrategy.java:37)
	at net.sf.json.JsonConfig.<clinit>(JsonConfig.java:65)
	at net.sf.json.JSONObject.fromObject(JSONObject.java:134)
	at core.util.SqlWhere.parseFilters2Map(SqlWhere.java:136)
	at core.support.view.PageData.<init>(PageData.java:39)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)

	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:708)



	... ...



	错误原因： 



	     由于在项目中用到net.sf.json-lib的json转换，缺少jar包引起 



	  



	解决办法： 



	     在pom.xml插入： 


        <dependency>
		    <groupId>commons-lang</groupId>
		    <artifactId>commons-lang</artifactId>
		    <version>2.4</version>
		</dependency>
		
		<dependency>
		    <groupId>commons-logging</groupId>
		    <artifactId>commons-logging</artifactId>
		    <version>1.2</version>
		</dependency>
		
		<dependency>
		    <groupId>commons-beanutils</groupId>
		    <artifactId>commons-beanutils</artifactId>
		    <version>1.9.3</version>
		</dependency>
		
		<dependency>
		    <groupId>commons-collections</groupId>
		    <artifactId>commons-collections</artifactId>
		    <version>3.2.2</version>
		</dependency>

	建议： 


	    项目用的是SpringMVC的就直接用@ResponseBody返回json，或者可以使用fastjson等json转换工具包