MainServer.UploadServlet.java Source code

Introduction

Here is the source code for MainServer.UploadServlet.java

Source

package MainServer;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;
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 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;

/**
 *
 * @author Wei
 */
@WebServlet(urlPatterns = { "/AnswerServlet" })
public class UploadServlet extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        DiskFileItemFactory factory = new DiskFileItemFactory();
        String upload = this.getServletContext().getRealPath("/upload/");
        String temp = System.getProperty("java.io.tmpdir");
        factory.setSizeThreshold(1024 * 1024 * 5);
        factory.setRepository(new File(temp));
        ServletFileUpload servleFileUplaod = new ServletFileUpload(factory);
        try {
            List<FileItem> list = servleFileUplaod.parseRequest(request);
            for (FileItem item : list) {
                String name = item.getFieldName();
                InputStream is = item.getInputStream();
                if (name.contains("content")) {
                    System.out.println(inputStream2String(is));
                } else {
                    if (name.contains("file")) {
                        try {
                            inputStream2File(is, upload + "\\" + item.getName());
                        } catch (Exception e) {
                        }
                    }
                }
            }
            out.write("success");
        } catch (FileUploadException | IOException e) {
            out.write("failure");
        }
        out.flush();
        out.close();
    }

    public static String inputStream2String(InputStream is) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        int i;
        while ((i = is.read()) != -1) {
            baos.write(i);
        }
        return baos.toString();
    }

    public static void inputStream2File(InputStream is, String savePath) throws Exception {
        System.out.println("Save path:" + savePath);
        File file = new File(savePath);
        InputStream inputStream = is;
        BufferedInputStream fis = new BufferedInputStream(inputStream);
        FileOutputStream fos = new FileOutputStream(file);
        int f;
        while ((f = fis.read()) != -1) {
            fos.write(f);
        }
        fos.flush();
        fos.close();
        fis.close();
        inputStream.close();
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}