我在我的一個java文件中使用Apache公共UrlValidator。 該文件編譯良好,但每當我運行它,我得到一個UrlValidator類的NoClassDefFoundErrorNoClassDefFoundError apache commons UrlValidator在GAE與日食
我使用Google App Engine 1.7.5與Eclipse Juno for JavaEE。我已經將commons jar文件包含在構建路徑以及源代碼下的項目運行配置中,但我仍然得到相同的錯誤。
繼承人我的java文件的代碼:
package com.serv.servshare;
import java.io.*;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.servlet.*;
import javax.servlet.http.*;
import com.google.appengine.api.datastore.DatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.PreparedQuery;
import com.google.appengine.api.datastore.Query;
import org.apache.commons.validator.routines.UrlValidator;
public class Share extends HttpServlet implements Servlet{
private static final long serialVersionUID = 1L;
DatastoreService ds;
String link,email,msgBody,title,name;
String[] schemes={"https","http","ftp"};
UrlValidator urlValidator;
boolean valid;
Query q;
PrintWriter out;
PreparedQuery pq;
Properties props;
Session session;
Message msg;
public void service(ServletRequest req, ServletResponse res)throws ServletException,IOException{
title=req.getParameter("title").toString();
link=req.getParameter("link").toString();
//Instantiate UrlValidator
urlValidator = new UrlValidator(schemes);
out=res.getWriter();
//Validate URL
if (urlValidator.isValid(link)) {
valid=true;
}
else {
valid=false;
}
if(valid){
try{
ds=DatastoreServiceFactory.getDatastoreService();
q=new Query("email");
pq=ds.prepare(q);
//Query database to get all email ids
for(Entity result : pq.asIterable()){
email=result.getProperty("email").toString();
name=result.getProperty("name").toString();
//Instantiating the email prerequisites
props=new Properties();
session=Session.getDefaultInstance(props, null);
msgBody=link;
msg = new MimeMessage(session);
msg.setFrom(new InternetAddress("[email protected]", "[email protected]"));
msg.addRecipient(Message.RecipientType.TO,new InternetAddress(email, name));
msg.setSubject(title);
msg.setText(msgBody);
//Sending out the uploaded link to all subscribers
Transport.send(msg);
out.println("<html><head><title>ServShare</title><meta http-equiv=\"refresh\" content=\"3; URL=index.jsp\"></head><body>Email sent! You will be redirected to the home page shortly.</body></html>");
}
}
catch(Exception e){
out.println("<html><body>An error was encountered while processing your request. Please go back and try again");
e.printStackTrace();
}
}
else{
out.println("<html><head><title>ServShare</title><meta http-equiv=\"refresh\" content=\"3; URL=index.jsp\"></head><body>The entered URL is not valid. You will be redirected to the home page shortly.</body></html>");
}
}
public void doGet(HttpServletRequest req, HttpServletResponse res)throws IOException,ServletException{
service(req,res);
}
public void doPost(HttpServletRequest req, HttpServletResponse res)throws IOException,ServletException{
service(req,res);
}
}
和繼承人的錯誤:
HTTP ERROR 500
問題訪問/共享。原因:
java.lang.NoClassDefFoundError:組織/阿帕奇/公/識別/程序/ UrlValidator 在com.serv.servshare.Share.service(Share.java:41
org/apache/commons/validator/routines/UrlValidator
所致) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1166) at com.google.appengine .api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:115 7) 在com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:123) 在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) 在COM。 google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.api。 blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:61) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCleanupFilter。 doFilter(TransactionCleanupFilter.java:43) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler。 Java的:1157) 在com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97) 在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) 在org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler。句柄(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:94) at org.mortbay.jetty。 handler.HandlerWrapper.handle(HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService $ ApiProxyHandler.handle(JettyContainerService.java:409) at org.mortbay.jetty.handler.HandlerWrapper.handle( HandlerWrapper。java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection $ RequestHandler.headerComplete(HttpConnection.java:923) 在org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) 在org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) 的組織。 (org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool $ PoolThread.run(QueuedThreadPool。 java:582) 引起:java.lang.ClassNotFoundException:org.apache.commons.validator.routines.UrlValidator at java.net.URLClassLoader $ 1.run(URLClassLoader.java:366) at java.net.URLClassLoader $ 1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java .net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:213 ) 在java.lang.ClassLoader.loadClass(ClassLoader.java:356) ... 34更 引起:
拋出java.lang.ClassNotFoundException:org.apache.commons.validator.routines.UrlValidator 在java.net.URLClassLoader $ 1.run(URLClassLoader.java:366) at java.net.URLClassLoader $ 1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method) at java。 net.URLClassLoader.findClass(URLClassLoader.java:354) at java.lang.ClassLoader.loadClass(ClassLoader.java:423) at com.google.appengine.tools.development.IsolatedAppClassLoader.loadClass(IsolatedAppClassLoader.java:213) at java.lang.ClassLoader.loadClass(ClassLoader.java:356) at com.serv.servshare.Share.service(Share.java:41) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder。 java:511) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1166) at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) at com。 google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:123) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools。 development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34) 在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) 在com.google.appengine.api.blobstore.dev.ServeBlobFilter。 doFilter(ServeBlobFilter.java:61) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157 ) 在com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43) 在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) 在com.google .appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125) at org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development .BackendServersFilter.doFilter(BackendServersFilter.java:97) 在org.mortbay.jetty.servlet.ServletHandler $ CachedChain.doFilter(ServletHandler.java:1157) 在org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java :388) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler。java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765) at org.mortbay。 jetty.webapp.WebAppContext.handle(WebAppContext.java:418) at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:94) at org.mortbay.jetty.handler.HandlerWrapper.handle( HandlerWrapper.java:152) at com.google.appengine.tools.development.JettyContainerService $ ApiProxyHandler.handle(JettyContainerService.java:409) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection .handleRequest(HttpConnection.java:542) 在org.mortbay.jetty.HttpConnection $ RequestHandler.headerComplete(HttpConnection.java:923) 在org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547) 在組織.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212) 在org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) 在org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java :409) 在org.mortbay.thread.QueuedThreadPool $ PoolThread.run(QueuedThreadPool.java:582) 技術碼頭://
我不知道以什麼導致此。 感謝您的幫助。
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