Tomcat 5.5 报错 java.lang.NoClassDefFoundError
我托管了一个 jsp 服务来访问 java 类以向服务器发送请求。我在本地计算机上托管的 Tomcat 6.0 服务器中托管了此服务，并且运行良好。但是当我在另一台具有 Tomcat 5.5 的服务器上尝试时，我收到此错误。
错误报告如下。如果有人可以提供帮助，我将非常感激。
错误报告
描述 服务器遇到内部错误 ()，导致其无法完成此请求。
异常
org.apache.jasper.JasperException：无法初始化类 sun.net.www.protocol.http.HttpURLConnection org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:460) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) sun.reflect.GenerateMethodAccessor47.invoke（来源未知） sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:616) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244) java.security.AccessController.doPrivileged（本机方法） javax.security.auth.Subject.doAsPrivileged(Subject.java:537) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
根本原因
javax.servlet.ServletException：无法初始化类sun.net.www.protocol.http.HttpURLConnection org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841) org.apache.jasper.runtime.PageContextImpl.access$11(PageContextImpl.java:779) org.apache.jasper.runtime.PageContextImpl$12.run(PageContextImpl.java:761) java.security.AccessController.doPrivileged（本机方法） org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:759) org.apache.jsp.index_jsp._jspService(index_jsp.java:125) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) sun.reflect.GenerateMethodAccessor47.invoke（来源未知） sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:616) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244) java.security.AccessController.doPrivileged（本机方法） javax.security.auth.Subject.doAsPrivileged(Subject.java:537) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
根本原因
java.lang.NoClassDefFoundError：无法初始化类sun.net.www.protocol.http.HttpURLConnection sun.net.www.protocol.http.Handler.openConnection(Handler.java:62) sun.net.www.protocol.http.Handler.openConnection(Handler.java:57) java.net.URL.openConnection(URL.java:963) com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:628) com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.defineDocVersion(XMLVersionDetector.java:189) com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:776) com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:741) com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123) com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:239) com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:288) javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:177) hiit.audioimager.ImageRetriever.getNopsaImages(ImageRetriever.java:86) org.apache.jsp.index_jsp._jspService(index_jsp.java:72) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) sun.reflect.GenerateMethodAccessor47.invoke（来源未知） sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) java.lang.reflect.Method.invoke(Method.java:616) org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244) java.security.AccessController.doPrivileged（本机方法） javax.security.auth.Subject.doAsPrivileged(Subject.java:537) org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
I hosted a jsp service to access a java class to send a request to a server. I hosted this service in Tomcat 6.0 server hosted in my local computer and it worked fine. But when I tried it with another server which has Tomcat 5.5 I'm getting this error.
Error report is given below. I'll be really grateful if someone can help.
Error Report
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: Could not initialize class sun.net.www.protocol.http.HttpURLConnection
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:460)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:616)
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAsPrivileged(Subject.java:537)
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276)
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
root cause
javax.servlet.ServletException: Could not initialize class sun.net.www.protocol.http.HttpURLConnection
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841)
org.apache.jasper.runtime.PageContextImpl.access$11(PageContextImpl.java:779)
org.apache.jasper.runtime.PageContextImpl$12.run(PageContextImpl.java:761)
java.security.AccessController.doPrivileged(Native Method)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:759)
org.apache.jsp.index_jsp._jspService(index_jsp.java:125)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:616)
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAsPrivileged(Subject.java:537)
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276)
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
root cause
java.lang.NoClassDefFoundError: Could not initialize class sun.net.www.protocol.http.HttpURLConnection
sun.net.www.protocol.http.Handler.openConnection(Handler.java:62)
sun.net.www.protocol.http.Handler.openConnection(Handler.java:57)
java.net.URL.openConnection(URL.java:963)
com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:628)
com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(XMLVersionDetector.java:189)
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:776)
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:741)
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123)
com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:239)
com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:288)
javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:177)
hiit.audioimager.ImageRetriever.getNopsaImages(ImageRetriever.java:86)
org.apache.jsp.index_jsp._jspService(index_jsp.java:72)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:616)
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:244)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAsPrivileged(Subject.java:537)
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:276)
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)
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我通过安装Tomcat6并卸载tomcat5.5解决了这个问题。问题是由我们存储它们的目录和java库路径引起的。它们都必须正确设置。所以不建议使用apt-get安装。最好下载 tar 并手动安装。
I solved this problem by installing Tomcat6 and uninstalling tomcat5.5. The problem was caused by the directories where we stored them and the java library path. They all have to be set properly. So apt-get installation is not advisable. Better download the tar and install it manually.