Ich versuche, die Daten aus der Datenbank abzurufen. Wenn ich das Programm starte zeigt es den Fehler java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException
Ich habe die JAR-Datei json-lib
in meinem Verzeichnis WEB-INF --> lib
, ich weiß nicht, warum es diesen Fehler für JSONArray
zeigt.java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException
Mein Code ist:
StringBuilder sb=new StringBuilder(1024);
sb.append("select * from ").append(uname.trim()).append("vcomments").append(" where itemid=").append(itemId).append(" and albumid=").append(albumId);
sql=sb.toString();
stmt = conn.prepareStatement(sql);
ResultSet rs = stmt.executeQuery();
//ArrayList<String> CommArray=new ArrayList();
JSONArray arrayObj=new JSONArray(); //#100
while(rs.next()){
Commenter comment = new Commenter();
comment.setUname(rs.getString("uname").trim());
comment.setComment(rs.getString("comments").trim());
arrayObj.add(comment.toString());
}
commentObj=gson.toJsonTree(arrayObj);
myObj.add("commentInfo", commentObj);
out.println(myObj.toString());
rs.close();
stmt.close();
stmt = null;
conn.close();
conn = null;
}
Und die Konsolenausgabe ist:
SEVERE: Servlet.service() for servlet [VComment] in context with path [/skypark] threw exception [Servlet execution threw an exception] with root cause
java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2904)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1173)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1681)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at skypark.VComment.doGet(VComment.java:100)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:931)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Bitte mir jemand sagen, wie dieses Problem zu lösen ...... Danke ....
Sie sind am ehesten den 'commons-lang' jar fehlen. –
@ Sotirios Delimanolis Es ist nicht 'commons-lang' Jar-Problem Ich habe diese JAR-Datei .. –
@James Ist es in' WEB-INF/lib'? Und können Sie überprüfen, dass es die richtige Klasse enthält? – millimoose