a

xiuxi

2019-08-30 12ce6f9e6123f99676b5c9fd2fa22501edddb7cb

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package com.basic.security;
 
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;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
 
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;
 
/**
 * Servlet implementation class UploadServlet
 */
public class UploadServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
 
    private static final String DATA_DIRECTORY = "data";
    private static final int MAX_MEMORY_SIZE = 1024 * 1024 * 2;
    private static final int MAX_REQUEST_SIZE = 300*1024 * 1024;
 
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 
        // Check that we have a file upload request
        boolean isMultipart = ServletFileUpload.isMultipartContent(request);
 
        if (!isMultipart) {
            return;
        }
 
        // Create a factory for disk-based file items
        DiskFileItemFactory factory = new DiskFileItemFactory();
 
        // Sets the size threshold beyond which files are written directly to
        // disk.
        factory.setSizeThreshold(MAX_MEMORY_SIZE);
 
        // Sets the directory used to temporarily store files that are larger
        // than the configured size threshold. We use temporary directory for
        // java
        factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
 
        // constructs the folder where uploaded file will be stored
        String uploadFolder = getServletContext().getRealPath("")
//                + File.separator + DATA_DIRECTORY
                ;
        System.out.println("uploadFolder="+uploadFolder);
        // Create a new file upload handler
        ServletFileUpload upload = new ServletFileUpload(factory);
 
        // Set overall request size constraint
        upload.setSizeMax(MAX_REQUEST_SIZE);
 
        try {
            // Parse the request
            List items = upload.parseRequest(request);
            Iterator iter = items.iterator();
            while (iter.hasNext()) {
                FileItem item = (FileItem) iter.next();
 
                if (!item.isFormField()) {
                    String fileName = new File(item.getName()).getName();
                    String filePath = uploadFolder + File.separator + fileName;
                    File uploadedFile = new File(filePath);
                    System.out.println(filePath);
                    // saves the file to upload directory
                    item.write(uploadedFile);
                }
            }
 
            // displays done.jsp page after upload finished
            getServletContext().getRequestDispatcher("/done.jsp").forward(
                    request, response);
 
        } catch (FileUploadException ex) {
            throw new ServletException(ex);
        } catch (Exception ex) {
            throw new ServletException(ex);
        }
 
    }
 
}