1
habe ich eine jsp Datei register.jsp, in dem ich die Details des Benutzers bin immer und versuchen, es in der Datenbank RegisterServlet.java zu sparenHTTP-Status 500 - Fehler Instanziieren Servletklasse com.controller.RegisterServlet
package com.controller;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.model.User;
import com.service.RegisterService;
public class RegisterServlet extends HttpServlet {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
String firstName = request.getParameter("firstName");
String middleName = request.getParameter("middleName");
String lastName = request.getParameter("lastName");
String email = request.getParameter("email");
String userId = request.getParameter("userId");
String password = request.getParameter("password");
User user = new User(firstName,middleName,lastName, email,userId, password);
try {
RegisterService registerService = new RegisterService();
boolean result = registerService.register(user);
out.println("<html>");
out.println("<head>");
out.println("<title>Registration Successful</title>");
out.println("</head>");
out.println("<body>");
out.println("<center>");
if(result){
out.println("<h1>Thanks for Registering with us :</h1>");
out.println("To login with new UserId and Password<a href=login.jsp>Click here</a>");
}else{
out.println("<h1>Registration Failed</h1>");
out.println("To try again<a href=register.jsp>Click here</a>");
}
out.println("</center>");
out.println("</body>");
out.println("</html>");
} finally {
out.close();
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>MVCApplication</display-name>
<servlet>
<display-name>LoginServlet</display-name>
<servlet-name>LoginServlet</servlet-name>
<servlet-class>com.controller.LoginServlet</servlet-class>
</servlet>
<servlet>
<display-name>RegisterServlet</display-name>
<servlet-name>RegisterServlet</servlet-name>
<servlet-class>com.controller.RegisterServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>InsertDataItem</servlet-name>
<servlet-class>com.controller.InsertDataItem</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>LoginServlet</servlet-name>
<url-pattern>/LoginServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>RegisterServlet</servlet-name>
<url-pattern>/RegisterServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>InsertDataItem</servlet-name>
<url-pattern>/InsertDataItem</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
</web-app>
Fehler
**exception**
javax.servlet.ServletException: Error instantiating servlet class com.controller.RegisterServlet
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
**root cause**
java.lang.ClassNotFoundException: com.controller.RegisterServlet
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1285)
org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1119)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
Wann immer einreichen ich meine Daten in der Datenbank diesen Fehler registrieren oben knallt !. Kann mir bitte jemand helfen ??
Wie der Stacktrace zeigt, ist die Ursache eine 'ClassNotFoundException'. Haben Sie sichergestellt, dass die Klasse auf dem Server bereitgestellt wird (d. H. In der .war-Datei enthalten)? – ohlec
fügen Sie diese Klasse dem Server hinzu, erstellen Sie eine Eclipse-Projekt-Proprieties-Deplyements-Assembly, und fügen Sie diese Klasse hinzu –