1：jbpm4.3包冲突
错误如下：
这里面需要删除juel.jar ,juel-engine.jar,juel-impl.jar 三个 jar文件
————————————————————————————————————————————————
但是在其他项目应用里面或许还需要这三个包，就只能把tomcat下面的el-api.jar删掉了
2：出现的错误如下：
3：当删除掉el-api.jar的时候出现的错误如下：
解决jbpm4.3当中el-api.jar和三个包冲突的过程中，删除el-api.jar是出现的错误，把名为javaee.jar包（在myeclipse下有这个包）放到tomcat/lib里面就可以了
错误如下：
严重: Servlet.service()
for
servlet jsp threw exception
java.lang.LinkageError: loader constraint violation: when resolving interface method " javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory; " the class loader (instance of org / apache / jasper / servlet / JasperLoader) of the current class , org / apache / jsp / index_jsp, and the class loader (instance of org / apache / catalina / loader / StandardClassLoader) for resolved class , javax / servlet / jsp / JspApplicationContext, have different Class objects for the type javax / el / ExpressionFactory used in the signature
at org.apache.jsp.index_jsp._jspInit(index_jsp.java: 26 )
at org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java: 52 )
at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java: 159 )
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java: 329 )
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java: 337 )
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java: 266 )
at javax.servlet.http.HttpServlet.service(HttpServlet.java: 803 )
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: 175 )
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: 286 )
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java: 844 )
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java: 583 )
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java: 447 )
at java.lang.Thread.run(Unknown Source)
java.lang.LinkageError: loader constraint violation: when resolving interface method " javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory; " the class loader (instance of org / apache / jasper / servlet / JasperLoader) of the current class , org / apache / jsp / index_jsp, and the class loader (instance of org / apache / catalina / loader / StandardClassLoader) for resolved class , javax / servlet / jsp / JspApplicationContext, have different Class objects for the type javax / el / ExpressionFactory used in the signature
at org.apache.jsp.index_jsp._jspInit(index_jsp.java: 26 )
at org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java: 52 )
at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java: 159 )
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java: 329 )
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java: 337 )
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java: 266 )
at javax.servlet.http.HttpServlet.service(HttpServlet.java: 803 )
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: 175 )
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: 286 )
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java: 844 )
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java: 583 )
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java: 447 )
at java.lang.Thread.run(Unknown Source)
这里面需要删除juel.jar ,juel-engine.jar,juel-impl.jar 三个 jar文件
————————————————————————————————————————————————
但是在其他项目应用里面或许还需要这三个包，就只能把tomcat下面的el-api.jar删掉了
2：出现的错误如下：
严重: Servlet.service()
for
servlet LeaveServlet threw exception
java.lang.ClassNotFoundException: de.odysseus.el.util.SimpleResolver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java: 1360 )
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java: 1206 )
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at org.jbpm.pvm.internal.script.JuelScriptEngineFactory.getScriptEngine(JuelScriptEngineFactory.java: 185 )
at javax.script.ScriptEngineManager.getEngineByName(Unknown Source)
at org.jbpm.pvm.internal.script.ScriptManager.evaluate(ScriptManager.java: 111 )
at org.jbpm.pvm.internal.script.ScriptManager.evaluateExpression(ScriptManager.java: 90 )
at org.jbpm.pvm.internal.model.ExecutionImpl.resolveAssignmentExpression(ExecutionImpl.java: 772 )
at org.jbpm.pvm.internal.model.ExecutionImpl.initializeAssignments(ExecutionImpl.java: 726 )
at org.jbpm.jpdl.internal.activity.TaskActivity.execute(TaskActivity.java: 95 )
at org.jbpm.jpdl.internal.activity.TaskActivity.execute(TaskActivity.java: 58 )
at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(ExecuteActivity.java: 60 )
at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java: 656 )
at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java: 616 )
at org.jbpm.pvm.internal.model.ExecutionImpl.start(ExecutionImpl.java: 217 )
at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java: 65 )
at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java: 38 )
at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java: 42 )
at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java: 54 )
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.executeInNewEnvironment(EnvironmentInterceptor.java: 53 )
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java: 40 )
at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java: 55 )
at org.jbpm.pvm.internal.svc.SkipInterceptor.execute(SkipInterceptor.java: 43 )
at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.startProcessInstanceByKey(ExecutionServiceImpl.java: 66 )
at cn.yu.qingjiaServlet.LeaveServlet.leave(LeaveServlet.java: 151 )
at cn.yu.qingjiaServlet.LeaveServlet.process(LeaveServlet.java: 80 )
at cn.yu.qingjiaServlet.LeaveServlet.doGet(LeaveServlet.java: 60 )
at javax.servlet.http.HttpServlet.service(HttpServlet.java: 690 )
at javax.servlet.http.HttpServlet.service(HttpServlet.java: 803 )
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 290 )
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java: 206 )
at cn.yu.qingjiaServlet.SetCharaterEncodingFilter.doFilter(SetCharaterEncodingFilter.java: 26 )
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 235 )
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: 175 )
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: 286 )
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java: 844 )
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java: 583 )
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java: 447 )
at java.lang.Thread.run(Unknown Source)
java.lang.ClassNotFoundException: de.odysseus.el.util.SimpleResolver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java: 1360 )
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java: 1206 )
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at org.jbpm.pvm.internal.script.JuelScriptEngineFactory.getScriptEngine(JuelScriptEngineFactory.java: 185 )
at javax.script.ScriptEngineManager.getEngineByName(Unknown Source)
at org.jbpm.pvm.internal.script.ScriptManager.evaluate(ScriptManager.java: 111 )
at org.jbpm.pvm.internal.script.ScriptManager.evaluateExpression(ScriptManager.java: 90 )
at org.jbpm.pvm.internal.model.ExecutionImpl.resolveAssignmentExpression(ExecutionImpl.java: 772 )
at org.jbpm.pvm.internal.model.ExecutionImpl.initializeAssignments(ExecutionImpl.java: 726 )
at org.jbpm.jpdl.internal.activity.TaskActivity.execute(TaskActivity.java: 95 )
at org.jbpm.jpdl.internal.activity.TaskActivity.execute(TaskActivity.java: 58 )
at org.jbpm.pvm.internal.model.op.ExecuteActivity.perform(ExecuteActivity.java: 60 )
at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperationSync(ExecutionImpl.java: 656 )
at org.jbpm.pvm.internal.model.ExecutionImpl.performAtomicOperation(ExecutionImpl.java: 616 )
at org.jbpm.pvm.internal.model.ExecutionImpl.start(ExecutionImpl.java: 217 )
at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java: 65 )
at org.jbpm.pvm.internal.cmd.StartProcessInstanceInLatestCmd.execute(StartProcessInstanceInLatestCmd.java: 38 )
at org.jbpm.pvm.internal.svc.DefaultCommandService.execute(DefaultCommandService.java: 42 )
at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java: 54 )
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.executeInNewEnvironment(EnvironmentInterceptor.java: 53 )
at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java: 40 )
at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java: 55 )
at org.jbpm.pvm.internal.svc.SkipInterceptor.execute(SkipInterceptor.java: 43 )
at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.startProcessInstanceByKey(ExecutionServiceImpl.java: 66 )
at cn.yu.qingjiaServlet.LeaveServlet.leave(LeaveServlet.java: 151 )
at cn.yu.qingjiaServlet.LeaveServlet.process(LeaveServlet.java: 80 )
at cn.yu.qingjiaServlet.LeaveServlet.doGet(LeaveServlet.java: 60 )
at javax.servlet.http.HttpServlet.service(HttpServlet.java: 690 )
at javax.servlet.http.HttpServlet.service(HttpServlet.java: 803 )
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 290 )
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java: 206 )
at cn.yu.qingjiaServlet.SetCharaterEncodingFilter.doFilter(SetCharaterEncodingFilter.java: 26 )
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java: 235 )
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: 175 )
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: 286 )
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java: 844 )
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java: 583 )
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java: 447 )
at java.lang.Thread.run(Unknown Source)
3：当删除掉el-api.jar的时候出现的错误如下：
java.lang.NoClassDefFoundError: javax
/
el
/
ExpressionFactory
解决jbpm4.3当中el-api.jar和三个包冲突的过程中，删除el-api.jar是出现的错误，把名为javaee.jar包（在myeclipse下有这个包）放到tomcat/lib里面就可以了