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Hey Ich versuche, Anfrage und Antwort auf JSP-Datei weiterzuleiten. Zuerst habe ich die Anfrage genannt an ein Servlet bin Spedition Startseite von einem Servlet Anmeldung dann in Startseite Servlet Ich übermittle die Anforderung an eine jsp Datei mit dem Namen genannt home.jsp.Servlet nicht nach jsp, sondern Weiterleitung an ein anderes Servlet (Request Dispatcher)
Alle meine JSP-Dateien sind in WEB-INF Ordner.
Das ist mein Login.java (Servlets):
package com.webauth.login;
import com.webauth.constants.ResponseConstants;
import com.webauth.db.DB;
import com.webauth.model.UserData;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.json.simple.JSONObject;
/**
*
* @author admin
*/
public class Login extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String userID = request.getParameter("userID");
DB db = new DB();
Connection connection = null;
boolean result = false;
String message = "Sorry User id doesn't exist or something went wrong";
UserData user = new UserData();
try {
connection = db.getConnection();
ResultSet rs = db.checkIfUserExist(connection, userID);
if(rs!=null){
if(rs.isBeforeFirst()){
while(rs.next()){
String username = rs.getString("username");
String email = rs.getString("email");
user.setUsername(username);
user.setEmail(email);
HttpSession session = request.getSession();
session.setAttribute("UserData", user);
result = true;
}
}
}
} catch (ClassNotFoundException ex) {
Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
} catch (SQLException ex) {
Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
}finally{
try {
connection.close();
} catch (SQLException ex) {
Logger.getLogger(Login.class.getName()).log(Level.SEVERE, null, ex);
}
}
if(result){
//This request dispatcher is working fine
RequestDispatcher rd = request.getRequestDispatcher("Home");
rd.forward(request, response);
}else{
JSONObject res = new JSONObject();
res.put(ResponseConstants.RESULT,result);
res.put(ResponseConstants.MESSAGE, message);
PrintWriter out = response.getWriter();
out.println(res);
}
}
}
Das ist mein Home.java (Servlets):
package com.webauth.home;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class Home extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//This is line printed onto console
System.out.println("This line is being printed);
//This request dispatcher is not working
RequestDispatcher rd = request.getRequestDispatcher("/WEB-INF/home.jsp");
rd.forward(request, response);
}
}
Das ist mein web.xml :
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<servlet>
<servlet-name>Register</servlet-name>
<servlet-class>com.webauth.registiration.Register</servlet-class>
</servlet>
<servlet>
<servlet-name>Login</servlet-name>
<servlet-class>com.webauth.login.Login</servlet-class>
</servlet>
<servlet>
<servlet-name>Home</servlet-name>
<servlet-class>com.webauth.home.Home</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Register</servlet-name>
<url-pattern>/Register</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Login</servlet-name>
<url-pattern>/Login</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Home</servlet-name>
<url-pattern>/Home</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
</web-app>
Hinweis: Alle meine JSP-Dateien befinden sich im Ordner WEB-INF.
Kann mir bitte jemand sagen, wo ich falsch liege. Danke