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В настоящее время я работаю над загрузкой файлов через сервлеты, и я получаю ошибку 404. Вот мой кодHTTP 404 запрашиваемый ресурс недоступна ошибка в tomcat 8.0.5
FileUpload.html
<html>
<head>
<title>File Uploading Form</title>
</head>
<body>
<h3>File Upload:</h3>
Select a file to upload:
<br />
<!-- form tag is genraly used for user input-->
<!-- action attr defines action to be performed when form is submitted -->
<!-- method attr defines the HTTP method to be used when submitting forms -->
<!-- enctype attr specifies the encoding of the submitted data -->
<form action="UploadServlet" method="post" enctype="multipart/form-data">
<!-- size attr specifies the visible width in chars of an <input> element -->
<input type="file" name="file" size="50" />
<br />
<input type="submit" value="Upload File" />
</form>
</body>
</html>
Я обновил свой файл web.xml также следующим
<context-param>
<description>Location to store uploaded file</description>
<param-name>file-upload</param-name>
<param-value>c:\apache-tomcat-5.5.29\webapps\data\</param-value>
</context-param>
<servlet>
<servlet-name>UploadServlet</servlet-name>
<servlet-class>UploadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UploadServlet</servlet-name>
<url-pattern>/UploadServlet</url-pattern>
</servlet-mapping>
UploadServlet.java // Импорт требуется Java библиотеки
import java.io.*;
import java.util.*;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.output.*;
public class UploadServlet extends HttpServlet {
boolean isMultipart;
private String filePath;
private int maxFileSize = 50 * 1024;
private int maxMemSize = 4 * 1024;
private File file ;
public void init(){
// Get the file location where it would be stored.
filePath =
getServletConfig().getInitParameter("file-upload");
}
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, java.io.IOException {
// Check that we have a file upload request
isMultipart = ServletFileUpload.isMultipartContent(request);
response.setContentType("text/html");
PrintWriter out = response.getWriter();
if(!isMultipart){
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
out.println("<p>No file uploaded</p>");
out.println("</body>");
out.println("</html>");
return;
}
DiskFileItemFactory factory = new DiskFileItemFactory();
// maximum size that will be stored in memory
factory.setSizeThreshold(maxMemSize);
// Location to save data that is larger than maxMemSize.
factory.setRepository(new File("c:\\temp"));
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// maximum file size to be uploaded.
upload.setSizeMax(maxFileSize);
try{
// Parse the request to get file items.
List fileItems = upload.parseRequest(request);
// Process the uploaded file items
Iterator i = fileItems.iterator();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
while (i.hasNext())
{
FileItem fi = (FileItem)i.next();
if (!fi.isFormField())
{
// Get the uploaded file parameters
String fieldName = fi.getFieldName();
String fileName = fi.getName();
String contentType = fi.getContentType();
boolean isInMemory = fi.isInMemory();
long sizeInBytes = fi.getSize();
// Write the file
if(fileName.lastIndexOf("\\") >= 0){
file = new File(filePath +
fileName.substring(fileName.lastIndexOf("\\"))) ;
}else{
file = new File(filePath +
fileName.substring(fileName.lastIndexOf("\\")+1)) ;
}
fi.write(file) ;
out.println("Uploaded Filename: " + fileName + "<br>");
}
}
out.println("</body>");
out.println("</html>");
}catch(Exception ex) {
System.out.println(ex);
}
}
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, java.io.IOException {
throw new ServletException("GET method used with " +
getClass().getName()+": POST method required.");
}
}
Ьгу 'действие =«/ UploadServlet»' с '/' – silentprogrammer
Нет Я устал это, он не работает – Srividya
, что вы имеете в виду, не работает? и какую IDE вы используете? – silentprogrammer