我的JSP和servlet的ClassNotFound异常 [英] ClassNotFound exception with my JSP and servlet

问题描述

当我使用JSP和servlet发布json对象时遇到了一些问题.我使用的是tomcat 6.0和JDK 1.7.0_09.我想我包括了所有必要的罐子.这是错误信息:

I've encountered some problem when I using JSP and servlet to post json object. I use tomcat 6.0 and JDK 1.7.0_09. I think I included all the necessary jars. Here is the error information:

java.lang.ClassNotFoundException:JsonParser在 org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680) 在 org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526) 在 org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128) 在 org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827) 在 org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129) 在 org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 在 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 在 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 在 org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 在 org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) 在 org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861) 在 org.apache.coyote.http11.Http11Protocol $ Http11ConnectionHandler.process(Http11Protocol.java:606) 在 org.apache.tomcat.util.net.JIoEndpoint $ Worker.run(JIoEndpoint.java:489) 在java.lang.Thread.run(Thread.java:722)

java.lang.ClassNotFoundException: JsonParser at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 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:861) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:722)

2013年1月4日上午10:24:07 org.apache.catalina.core.StandardWrapperValve 调用SEVERE:为Servlet JsonParser分配异常 java.lang.ClassNotFoundException:JsonParser在 org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680) 在 org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526) 在 org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128) 在 org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827) 在 org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129) 在 org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 在 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 在 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 在 org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 在 org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) 在 org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861) 在 org.apache.coyote.http11.Http11Protocol $ Http11ConnectionHandler.process(Http11Protocol.java:606) 在 org.apache.tomcat.util.net.JIoEndpoint $ Worker.run(JIoEndpoint.java:489) 在java.lang.Thread.run(Thread.java:722)

Jan 04, 2013 10:24:07 AM org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Allocate exception for servlet JsonParser java.lang.ClassNotFoundException: JsonParser at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1128) at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) 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:861) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:722)

关于出了什么问题的任何想法吗?

Any ideas as to what is going wrong?

推荐答案

请确保您已正确命名软件包，因为

make sure you have named your packages properly, beacuse

在Tomcat 4.x及更高版本中，JSP的软件包永远不会与JSP的软件包相同. 默认程序包.

In Tomcat 4.x and up, the JSP's package will never be the same as the default package.

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