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Ich erhalte einen Fehler in einem Dispatcher der Forward-Methode. Dies ist mein Beispielcode, bekomme eine Fehlermeldung. Ich brauche Anzeigename mit s2.java Datei.Fehler bei der Weiterleitungsmethode des Dispatcher-Servlets erhalten
Es zeigt HTML-Seite und ich put Namen zuerst und zuletzt und dann senden Sie es show error.
/*this is s1.java(first java file)*/
package rqdis;
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 S1 extends HttpServlet{
\t public void doPost(HttpServletResponse rs,HttpServletRequest rq)
\t throws ServletException,IOException{
\t \t try{
\t \t \t rs.setContentType("text/html");
\t \t \t PrintWriter p=rs.getWriter();
\t \t \t String s1=rq.getParameter("n1");
\t \t \t String s2=rq.getParameter("n2");
\t \t \t p.print(s1+" "+s2);
\t \t RequestDispatcher rd=rq.getRequestDispatcher("/fff");
\t \t rd.forward(rq, rs);
\t \t p.print("am from server 1.!");
\t \t p.close();
\t \t }catch (Exception e){
\t \t \t e.printStackTrace();
\t \t }
\t }
}
/*this is s2.java(second java file)*/
package rqdis;
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;
public class s2 extends HttpServlet{
\t public void doPost(HttpServletRequest rq,HttpServletResponse rs)
\t throws ServletException,IOException{
\t \t try{
\t \t rs.setContentType("text/html");
\t \t PrintWriter p=rs.getWriter();
\t \t String s1=rq.getParameter("n1");
\t \t String s2=rq.getParameter("n2");
\t \t p.print(s1+" "+s2);
\t \t p.print("am from server 2.!");
\t \t p.close();
\t \t }catch (Exception e){
\t \t \t e.printStackTrace();
\t \t }
\t }
}<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>rqdis</display-name>
<welcome-file-list>
<welcome-file>main.html</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>firstservlet</servlet-name>
<servlet-class>rqdis.S1</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>firstservlet</servlet-name>
<url-pattern>/ff</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>secondservlet</servlet-name>
<servlet-class>rqdis.s2</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>secondservlet</servlet-name>
<url-pattern>/fff</url-pattern>
</servlet-mapping>
</web-app><html>
<head>
<meta charset="ISO-8859-1">
<title>disfor</title>
</head>
<body>
<form action="forward metod" method="post">
First name:
<input type="text" name="n1"> Last name:
<input type="text" name="n2">
<input type="submit" value="Submit">
</form>
</body>
</html>
Was ist der Fehler, den Sie bekommen? :) – Squazz