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Question

严重: Servlet.service() for servlet jsp threw exception
java.lang.ClassNotFoundException: org.apache.commons.collections.map.MultiKeyMap
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at net.sf.json.JsonConfig.<init>(JsonConfig.java:56)
at net.sf.json.JSONArray.fromObject(JSONArray.java:120)
at com.jsonTree.JSONTree.getJSONString(JSONTree.java:75)
at org.apache.jsp.tree_jsp._jspService(tree_jsp.java:78)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)

Answer 1

java.lang.ClassNotFoundException: org.apache.commons.collections.map.MultiKeyMap 没有找到org.apache.commons.collections.map.MultiKeyMap  这个类没有导入commons-collections.jar请继续发帖 每个贴10分!

Answer 2

java.lang.ClassNotFoundException: org.apache.commons.collections.map.MultiKeyMap 

Answer 3

org.apache.commons.collections.map.MultiKeyMap 这个类没找到，请加入包common-collections.jar

Answer 4

 ClassNotFoundException
相同的问题你发两次
 这个就是类找不到异常
如果后面的不是你定义的东西那就是包没加上
如果是你自己定义的方法类包的话
那就是包名或者路径错误
 ------------
我说的是一般情况