我托管了一个 jsp 服务来访问一个 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 服务器中托管了这项服务，它运行良好。但是当我在另一台具有 Tomcat 5.5 的服务器上尝试它时，我收到了这个错误。
错误报告如下。如果有人可以提供帮助，我将不胜感激。
错误报告
描述 服务器遇到一个内部错误 () 阻止它完成这个请求。
例外
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.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（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(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(未知来源） 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)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)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)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。执行(SecurityUtil.java:276) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)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。执行(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.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。解析(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)执行(SecurityUtil.java:276) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)执行(SecurityUtil.java:276) org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:162)