javaweb 下载图片的步骤
protectedvoiddoGet(HttpServletRequestreq,HttpServletResponseresp)throwsServletException,IOException{ //1、获取文件名路径 StringrealPath="D:\\Java\\javaweb\\javaweb-02-servlet\\response\\src\\main\\resources\\1.png"; System.out.println("下载文件的路径"+realPath); //2、获取文件名 StringfileName=realPath.substring(realPath.lastIndexOf("\\")+1); //3、设置浏览器支持下载内容,文件名编码 resp.setHeader("Content-Disposition","attachment;fileName="+URLEncoder.encode(fileName,"UTF-8")); //4、获取下载输入流 FileInputStreamin=newFileInputStream(realPath); //5、创建缓冲区 intlen=0; byte[]buffer=newbyte[1024]; ServletOutputStreamout=resp.getOutputStream(); //6、将输入流写入缓冲区,将数据输出到客户端 while((len=in.read(buffer))>0){ out.write(buffer,0,len); } in.close(); out.close(); }