response妙用

1、弹框提示信息

　　response.getWriter().print("<script>alert('文件不存在或已删除！');</script>");

2、跨域下载附件

　　response.setStatus(302);
　　response.setHeader("location","http://11.1.249.6:8181/collect/filedown?id=1name=xx);

3、控制页面刷新

　　response.setHeader("refresh","1");

4、定时转入其他页面10秒后转入新的页面

　　response.setHeader("refresh", "10;URL=testResponse6.jsp");

5、附件下载

　　response.setContentType("image/jpeg");

　　response.setHeader("Content- Disposition","attachment;filename=Bluehills.jpg");

　　response.setHeader("Content-Disposition", "attachment; filename=" + java.net.URLEncoder.encode(fileName, "UTF-8"));

6、设置无缓存

　　response.setHeader("Pragma", "No-cache");

　　response.setHeader("Cache-Control", "no-cache");