package com.js.ai.modules.pointwall.util;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

 *

 * @ClassName: ApkUtils

 * @Description: TODO 上传apk文件

 * @author:

 * @date:

 */

public class ApkUtils {

/**

 *

 * @Title: downloadCsv

 * @Description: TODO 下载apk

 * @param request

 * @param response

 * @param fileName

 * @throws Exception 

 * @return: void

 */

public static void download(HttpServletRequest request, HttpServletResponse response,String fileName ) throws Exception{

		response.setContentType("text/html;charset=UTF-8");

		BufferedInputStream in = null;

		BufferedOutputStream out = null;

		request.setCharacterEncoding("UTF-8");

		String rootpath = request.getSession().getServletContext().getRealPath("/");

		try {

			File f = new File(rootpath  + fileName);

			response.setContentType("application/x-excel");

			response.setCharacterEncoding("UTF-8");

			response.setHeader("Content-Disposition", "attachment; filename=" + fileName);

			response.setHeader("Content-Length", String.valueOf(f.length()));

			in = new BufferedInputStream(new FileInputStream(f));

			out = new BufferedOutputStream(response.getOutputStream());

			byte[] data = new byte[1024];

			int len = 0;

			while (-1 != (len = in.read(data, 0, data.length))) {

				out.write(data, 0, len);

			}

		} catch (Exception e) {

			e.printStackTrace();

		} finally {

			if (in != null) {

				in.close();

			}

			if (out != null) {

				out.close();

			}

		}

	}

     public static void  downloadImage(HttpServletRequest request, HttpServletResponse response,String fileName )throws Exception{

    	  //读取本地图片输入流

    	 request.setCharacterEncoding("UTF-8");

    	 response.setCharacterEncoding("UTF-8");

 		 String rootpath = request.getSession().getServletContext().getRealPath("/");

         FileInputStream inputStream = new FileInputStream(rootpath+fileName);

         int len= inputStream.available();

         //byte数组用于存放图片字节数据

         byte[] buff = new byte[len];

         inputStream.read(buff);

         //记得关闭输入流

         inputStream.close();

         //设置发送到客户端的响应内容类型

         response.setContentType("image/*");

         OutputStream out = response.getOutputStream();

         out.write(buff);

         //关闭响应输出流

         out.close();

    }

}