Apache Commons fileUpload完成文件上傳之一。本站提示廣大學習愛好者：（Apache Commons fileUpload完成文件上傳之一）文章只能為提供參考，不一定能成為您想要的結果。以下是Apache Commons fileUpload完成文件上傳之一正文
空話不多說了，直奔主題了。
須要兩個jar包：
commons-fileupload.jar
Commons IO的jar包（本文應用commons-io-2.4.jar）
應用Servlet來完成文件上傳。
package web.servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
/**
* Servlet implementation class UploadServlet
*/
@WebServlet("/UploadServlet")
public class UploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private String uploadPath = "D:\\temp"; // 上傳文件的目次
private String tempPath = "d:\\temp\\buffer\\"; // 暫時文件目次
File tempPathFile;
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
try {
// Create a factory for disk-based file items
DiskFileItemFactory factory = new DiskFileItemFactory();
// Set factory constraints
factory.setSizeThreshold(4096); // 設置緩沖區年夜小，這裡是4kb
factory.setRepository(tempPathFile);// 設置緩沖區目次
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// Set overall request size constraint
upload.setSizeMax(4194304); // 設置最年夜文件尺寸，這裡是4MB
List<FileItem> items = upload.parseRequest(request);// 獲得一切的文件
Iterator<FileItem> i = items.iterator();
while (i.hasNext()) {
FileItem fi = (FileItem) i.next();
String fileName = fi.getName();
if (fileName != null) {
File fullFile = new File(fi.getName());
File savedFile = new File(uploadPath, fullFile.getName());
fi.write(savedFile);
}
}
System.out.print("upload succeed");
} catch (Exception e) {
// 可以跳轉失足頁面
e.printStackTrace();
}
}
public void init() throws ServletException {
File uploadFile = new File(uploadPath);
if (!uploadFile.exists()) {
uploadFile.mkdirs();
}
File tempPathFile = new File(tempPath);
if (!tempPathFile.exists()) {
tempPathFile.mkdirs();
}
}
}
jsp
<%@ page language="java" contentType="text/html; charset=ISO--" pageEncoding="utf-"%> <!DOCTYPE html PUBLIC "-//WC//DTD HTML . Transitional//EN" "http://www.w.org/TR/html/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GB"> <title>File upload</title> </head> <body> <!-- // action="fileupload"對應web.xml中<servlet-mapping>中<url-pattern>的設置. --> <form name="myform" action="UploadServlet" method="post" enctype="multipart/form-data"> File:<br> <input type="file" name="myfile"><br> <br> <input type="submit" name="submit" value="Commit"> </form> </body> </html>
如許就可以簡略完成一個文件上傳功效了，固然這是最最最根本的，持續研討中。
