android - Servlet: java.lang.ClassNotFoundException: org.json.simple.parser.ParseException -

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i implementing google cloud messaging service android. have created test server sends push notifications application users. server have created generating following error. using java servlet @ server side , have included gcm-server.jar file in project.

here log:

java.lang.classnotfoundexception: org.json.simple.parser.parseexception     @ org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1680)     @ org.apache.catalina.loader.webappclassloader.loadclass(webappclassloader.java:1526)     @ com.mgcm.sendgcmmessage.processrequest(sendgcmmessage.java:48)     @ com.mgcm.sendgcmmessage.dopost(sendgcmmessage.java:40)     @ javax.servlet.http.httpservlet.service(httpservlet.java:637)     @ javax.servlet.http.httpservlet.service(httpservlet.java:717)     @ org.apache.catalina.core.applicationfilterchain.internaldofilter(applicationfilterchain.java:290)     @ org.apache.catalina.core.applicationfilterchain.dofilter(applicationfilterchain.java:206)     @ org.apache.catalina.core.standardwrappervalve.invoke(standardwrappervalve.java:233)     @ org.apache.catalina.core.standardcontextvalve.invoke(standardcontextvalve.java:191)     @ org.apache.catalina.core.standardhostvalve.invoke(standardhostvalve.java:127)     @ org.apache.catalina.valves.errorreportvalve.invoke(errorreportvalve.java:102)     @ org.apache.catalina.core.standardenginevalve.invoke(standardenginevalve.java:109)     @ org.apache.catalina.connector.coyoteadapter.service(coyoteadapter.java:298)     @ org.apache.coyote.http11.http11processor.process(http11processor.java:859)     @ org.apache.coyote.http11.http11protocol$http11connectionhandler.process(http11protocol.java:588)     @ org.apache.tomcat.util.net.jioendpoint$worker.run(jioendpoint.java:489)     @ java.lang.thread.run(unknown source)

any idea what's wrong this?

i had same problem, try adding library:

http://code.google.com/p/json-simple/downloads/detail?name=json-simple-1.1.1.jar

tomy


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