package org.servlet.demo;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.URL;import java.net.URLEncoder;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/*** 测试在servlet中，，发送请求 下载图片* * @author k.sea* */public class DownLoadImageServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // 获取当前目录的图片路径 // String path=this.getServletContext().getRealPath("/image/tuxing.png"); String path=this.getServletContext().getRealPath("/image/水星.png"); // 获取文件名 String fileName=path.substring(path.lastIndexOf("\\")+1); System.out.println(fileName); //制定浏览器头 //在下载的时候这里是英文是没有问题的 //resp.setHeader("content-disposition", "attachment;fileName="+fileName); //如果图片名称是中文需要设置转码 resp.setHeader("content-disposition", "attachment;fileName="+URLEncoder.encode(fileName, "UTF-8")); InputStream reader = null; OutputStream out = null; byte[] bytes = new byte[1024]; int len = 0; try { // 读取文件 reader = new FileInputStream(path); // 写入浏览器的输出流 out = resp.getOutputStream(); while ((len = reader.read(bytes)) > 0) { out.write(bytes, 0, len); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (reader != null) { reader.close(); } if (out != null) out.close(); } } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // TODO Auto-generated method stub doGet(req, resp); }}
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