com.usefullc.platform.common.utils.IOUtils.java Source code

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Here is the source code for com.usefullc.platform.common.utils.IOUtils.java

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/*
 * Copyright 2010-2011 ESunny.com All right reserved. This software is the confidential and proprietary information of
 * ESunny.com ("Confidential Information"). You shall not disclose such Confidential Information and shall use it only
 * in accordance with the terms of the license agreement you entered into with ESunny.com.
 */
package com.usefullc.platform.common.utils;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;

/**
 * FileIoUtils.java??TODO ??
 * 
 * @author shengshang.tang 2014328 ?11:31:06
 */
public class IOUtils {

    /**
     * 
     * 
     * @param path
     * @param fileName
     * @param response
     * @return
     */
    public static void download(String path, String fileName, HttpServletResponse response) {
        try {

            if (StringUtils.isEmpty(path)) {
                throw new IllegalArgumentException("?");
            } else {
                File file = new File(path);
                if (!file.exists()) {
                    throw new IllegalArgumentException("??");
                }
            }
            if (StringUtils.isEmpty(fileName)) {
                throw new IllegalArgumentException("???");
            }
            if (response == null) {
                throw new IllegalArgumentException("response ?");
            }

            // path
            File file = new File(path);

            // ??
            InputStream fis = new BufferedInputStream(new FileInputStream(path));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
            // response
            response.reset();

            // ??linux ?  linux utf-8,windows  GBK)
            String defaultEncoding = System.getProperty("file.encoding");
            if (defaultEncoding != null && defaultEncoding.equals("UTF-8")) {

                response.addHeader("Content-Disposition",
                        "attachment;filename=" + new String(fileName.getBytes("GBK"), "iso-8859-1"));
            } else {
                response.addHeader("Content-Disposition",
                        "attachment;filename=" + new String(fileName.getBytes(), "iso-8859-1"));
            }

            // responseHeader
            response.addHeader("Content-Length", "" + file.length());
            response.setContentType("application/octet-stream");
            OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    /**
     * 
     * 
     * @param content
     * @param fileName
     * @param response
     */
    public static void download(byte[] content, String fileName, HttpServletResponse response) {
        try {
            // response
            response.reset();

            // ??linux ?  linux utf-8,windows  GBK)
            String defaultEncoding = System.getProperty("file.encoding");
            if (defaultEncoding != null && defaultEncoding.equals("UTF-8")) {

                response.addHeader("Content-Disposition",
                        "attachment;filename=" + new String(fileName.getBytes("GBK"), "iso-8859-1"));
            } else {
                response.addHeader("Content-Disposition",
                        "attachment;filename=" + new String(fileName.getBytes(), "iso-8859-1"));
            }

            // responseHeader
            response.addHeader("Content-Length", "" + content.length);
            response.setContentType("application/octet-stream");
            OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
            toClient.write(content);
            toClient.flush();
            toClient.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

}