jsp页面图片的简单下载

1、jsp

$(document).on("click",".download",function(){
var tContent=$(this).attr("va");
alert(tContent);
tContent=tContent.substr(7);
alert(tContent);
var url="/title_download";
location.href=url+"?tContent="+tContent;
})

2、ajax动态添加里面

<a href='javascript:void(0)' class='download' va='"+item.tContent+"'> 下载</a>

3、controller页面处理

@RequestMapping("/title_download")
public void titleDownload(String tContent,HttpSession session,HttpServletResponse response) throws IOException{
//1路径
String realpath=session.getServletContext().getRealPath(File.separator+"image"+File.separator+tContent);
//2输入流
System.out.println(realpath);
BufferedInputStream inputStream = new BufferedInputStream(new FileInputStream(new File(realpath)));
//3下载名称
String filename="下载.jpg";
filename=new String(filename.getBytes("gbk"), "iso8859-1");

//4设置下载头
response.addHeader("Content-Disposition", "attachment;filename="+filename);
//5设置文件contenttype类型
response.setContentType("multipart/form-data");
//6输出流
BufferedOutputStream outputStream = new BufferedOutputStream(response.getOutputStream());
IOUtils.copy(inputStream, outputStream);
/* int len=0;
while ((len=inputStream.read())!=-1) {
outputStream.write(len);
}
outputStream.close();
inputStream.close();*/
}