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양식을 사용하여 HttpServletRequest 객체에서 매개 변수를 가져올 수 없습니다.HttpServletRequest에 매개 변수가 없습니다?
내 프로젝트는 Java6을 사용하도록 설정되었으며 동적 웹 프로젝트 2.5입니다.
HTML 페이지의 COD :
가<%@ page pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<!DOCTYPE html">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Thesaurus Builder</title>
<link type="text/css" rel="stylesheet" href="<c:url value="/form.css"/>" />
</head>
<body>
<form action="<c:url value='/' />" method="post" accept-charset="UTF-8"> <!-- accept-charset="UTF-8" -->
<fieldset>
<legend>Analyse de texte</legend>
<label for="file">Fichier à analyser</label>
<textarea rows="7" cols="100" name="file" id="file" ></textarea>
<br />
<br />
<label for="encoding">Encodage</label>
<input type="text" id="encoding" name="encoding" value="UTF-8" />
<br />
<br />
<br />
<label for="debug">Mode Debug</label>
<input type="checkbox" id="debug" name="debug"/>
<br />
<br />
<input type="submit" value="Envoyer" class="sansLabel" />
<br />
</fieldset>
</form>
</body>
</html>
서블릿 :
package test2;
import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class Tester extends HttpServlet{
/**
*
*/
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
this.getServletContext().getRequestDispatcher("/WEB-INF/input.jsp").forward(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{
Map<String,String> map = request.getParameterMap();
for(Entry<String, String> s : map.entrySet()){
System.out.println(s.getKey() + " - "+ s.getValue());
}
this.getServletContext().getRequestDispatcher("/WEB-INF/input.jsp").forward(request, response);
}
}
과의 web.xml은 :
가<?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_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>test2</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>Tester</servlet-name>
<servlet-class>test2.Tester</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Tester</servlet-name>
<url-pattern>/test</url-pattern>
<url-pattern>/default.html</url-pattern>
<url-pattern>/default.htm</url-pattern>
<url-pattern>/index.html</url-pattern>
</servlet-mapping>
</web-app>
서블릿의 기능은 인쇄 does'nt 아무것도. 나는 여기에서 완전하게 붙어있다. 누가 뭘해야하는지 알지?
Weeeell, 서블릿은 URL "/index.html"에 매핑되며 URL "/"을 호출 할 때 호출되어야합니다. 그것은 GET과 Java 7의 POST를 통해 작동하지만 문제가있는 것으로 보입니다. 이상한. 그러나 어쨌든 당신을 감사하십시오. – Laetan