package com.fh.util;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.commons.io.FileUtils;
import org.springframework.web.multipart.MultipartFile;

/**
 * 说明：上传文件
 * 作者：FH Admin
 * 官网：fhadmin.cn
 */
public class FileUpload {

  /**上传文件
   * @param file      //文件对象
   * @param filePath    //上传路径
   * @param fileName    //文件名
   * @return  文件名
   */
  public static String fileUp(MultipartFile file, String filePath, String fileName){
    String extName = ""; // 扩展名格式：
    try {
      if (file.getOriginalFilename().lastIndexOf(".") >= 0){
        extName = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));
      }
      copyFile(file.getInputStream(), filePath, fileName+extName).replaceAll("-", "");
    } catch (IOException e) {
      System.out.println(e);
    }
    return fileName+extName;
  }
  
  /**
   * 写文件到当前目录的upload目录中
   * @param in
   * @param fileName
   * @throws IOException
   */
  public static String copyFile(InputStream in, String dir, String realName)
      throws IOException {
    File file = mkdirsmy(dir,realName);
    FileUtils.copyInputStreamToFile(in, file);
    in.close();
    return realName;
  }
  
  
  /**判断路径是否存在，否：创建此路径
   * @param dir  文件路径
   * @param realName  文件名
   * @throws IOException 
   */
  public static File mkdirsmy(String dir, String realName) throws IOException{
    File file = new File(dir, realName);
    if (!file.exists()) {
      if (!file.getParentFile().exists()) {
        file.getParentFile().mkdirs();
      }
      file.createNewFile();
    }
    return file;
  }
  
  
  /**下载网络图片上传到服务器上
   * @param httpUrl 图片网络地址
   * @param filePath  图片保存路径
   * @param myFileName  图片文件名(null时用网络图片原名)
   * @return  返回图片名称
   */
  public static String getHtmlPicture(String httpUrl, String filePath , String myFileName) {
    
    URL url;            //定义URL对象url
    BufferedInputStream in;     //定义输入字节缓冲流对象in
    FileOutputStream file;      //定义文件输出流对象file
    try {
      String fileName = null == myFileName?httpUrl.substring(httpUrl.lastIndexOf("/")).replace("/", ""):myFileName; //图片文件名(null时用网络图片原名)
      url = new URL(httpUrl);   //初始化url对象
      in = new BufferedInputStream(url.openStream());                 //初始化in对象，也就是获得url字节流
      //file = new FileOutputStream(new File(filePath +"\\"+ fileName));
      file = new FileOutputStream(mkdirsmy(filePath,fileName));
      int t;
      while ((t = in.read()) != -1) {
        file.write(t);
      }
      file.close();
      in.close();
      return fileName;
    } catch (MalformedURLException e) {
      e.printStackTrace();
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
    return null;
    
  }
}



package com.fh.util;

import java.io.BufferedOutputStream;
import java.io.OutputStream;
import java.net.URLEncoder;

import javax.servlet.http.HttpServletResponse;

/**
 * 说明：下载文件
 * 作者：FH Admin
 * 官网：fhadmin.cn
 */
public class FileDownload {

  /**
   * @param response 
   * @param filePath    //文件完整路径(包括文件名和扩展名)
   * @param fileName    //下载后看到的文件名
   * @return  文件名
   */
  public static void fileDownload(final HttpServletResponse response, String filePath, String fileName) throws Exception{  
    byte[] data = FileUtil.toByteArray2(filePath);  
      fileName = URLEncoder.encode(fileName, "UTF-8");  
      response.reset();  
      response.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");  
      response.addHeader("Content-Length", "" + data.length);  
      response.setContentType("application/octet-stream;charset=UTF-8");  
      OutputStream outputStream = new BufferedOutputStream(response.getOutputStream());  
      outputStream.write(data);  
      outputStream.flush();  
      outputStream.close();
      response.flushBuffer();
  } 

}