优化

ChenJiaHe

2020-11-25 db7fc9f145beb76bbef19b1812d63d2ffc2d0df9

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package com.hx.util;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
 
public class DownFileUtil {
 
    /**
     * 下载文件工具
     * 
     * @param path
     *            完整路径（可用simpleToof工具获取）
     */
    public static void DownFile(HttpServletRequest request,HttpServletResponse  response,String path) {
        final String userAgent = request.getHeader("USER-AGENT");
        try {
            // AdminUpload adminUpload = dm.find(AdminUpload.class, fileName);
            // String str =adminUpload.getPath();
            String filePath = path;
            // System.out.println("path"+ServletActionContext.getRequest().getRealPath("/")
            // + filePath);
            // File downfile = new
            // File(ServletActionContext.getRequest().getRealPath("/") +
            // filePath);
            File downfile = new File(filePath);
            String filename = "";
            if(userAgent.equals("MSIE")){//IE浏览器
                filename = URLEncoder.encode(downfile.getName(),"UTF8");
            }else if(userAgent.equals("Mozilla")){//google,火狐浏览器
                filename = new String(downfile.getName().getBytes(), "ISO8859-1");
            }else{
                filename = URLEncoder.encode(downfile.getName(),"UTF8");//其他浏览器
            }
            InputStream fis = new BufferedInputStream(new FileInputStream(
                    downfile));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
            response.reset();
            response.addHeader("Content-Disposition",
                    "attachment;filename=" + filename);
            response.addHeader("Content-Length",
                    "" + downfile.length());
            OutputStream toClient = new BufferedOutputStream(
                    response.getOutputStream());
            response.setContentType(
                    "application/octet-stream");
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    /**
     * 下载文件工具（提示选择路径）
     * 
     * @param path
     *            完整路径（可用simpleToof工具获取）
     */
    public static void DownFileTips(HttpServletRequest request,HttpServletResponse response,String path) {
        final String userAgent = request.getHeader("USER-AGENT");
        try {
            // AdminUpload adminUpload = dm.find(AdminUpload.class, fileName);
            // String str =adminUpload.getPath();
            String filePath = path;
            // System.out.println("path"+ServletActionContext.getRequest().getRealPath("/")
            // + filePath);
            // File downfile = new
            // File(ServletActionContext.getRequest().getRealPath("/") +
            // filePath);
            File downfile = new File(filePath);
 
            String filename = "";
            if(userAgent.equals("MSIE")){//IE浏览器
                filename = URLEncoder.encode(downfile.getName(),"UTF8");
            }else if(userAgent.equals("Mozilla")){//google,火狐浏览器
                filename = new String(downfile.getName().getBytes(), "ISO8859-1");
            }else{
                filename = URLEncoder.encode(downfile.getName(),"UTF8");//其他浏览器
            }
            InputStream fis = new BufferedInputStream(new FileInputStream(
                    downfile));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
            
            response.addHeader("Content-Disposition", "attachment;filename="+ new String(filename.getBytes()));  
            OutputStream toClient= new BufferedOutputStream(response.getOutputStream());  
            response.setContentType("application/vnd.ms-excel;charset=utf-8");  
               
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    /**
     * 下载文件工具（提示选择路径）
     *
     * @param downfile
     *            导出的文件
     * @param fileName
     *            导出的文件名称
     */
    public static void DownFileTips(HttpServletRequest request, HttpServletResponse response, File downfile, String fileName) {
        final String userAgent = request.getHeader("USER-AGENT");
        try {
            if(StringUtils.isEmpty(fileName)){
                fileName = downfile.getName();
            }
            String filename =  "";
            if(userAgent.equals("MSIE")){//IE浏览器
                filename = URLEncoder.encode(fileName,"UTF8");
            }else if(userAgent.equals("Mozilla")){//google,火狐浏览器
                filename = new String(fileName.getBytes(), "ISO8859-1");
            }else{
                filename = URLEncoder.encode(fileName,"UTF8");//其他浏览器
            }
            InputStream fis = new BufferedInputStream(new FileInputStream(
                    downfile));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
 
            response.addHeader("Content-Disposition", "attachment;filename="+ filename);
            OutputStream toClient= new BufferedOutputStream(response.getOutputStream());
            response.setContentType("application/vnd.ms-excel;charset=utf-8");
 
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
}