Content-Disposition 解答

字段介绍如下：

disposition := "Content-Disposition" ":"  
               disposition-type  
               *(";" disposition-parm)  
disposition-type := "inline"  
                  / "attachment"  
                  / extension-token  
                  ; values are not case-sensitive  
disposition-parm := filename-parm / parameter  
filename-parm := "filename" "=" value;  

Content-Disposition属性有两种类型：

inline 和 attachment inline ：将文件内容直接显示在页面

attachment：弹出对话框让用户下载

案例如下：

Content-Type: image/jpeg  
Content-Disposition: inline;filename=hello.jpg  
Content-Description: just a small picture of me  

在页面内打开代码：

File file = new File("rfc1806.txt");  
String filename = file.getName();  
response.setHeader("Content-Type","text/plain");  
response.addHeader("Content-Disposition","inline;filename=" + new String(filename.getBytes(),"utf-8"));  
response.addHeader("Content-Length","" + file.length());  

弹出保存框代码：

File file = new File("rfc1806.txt");  
String filename = file.getName();  
response.setHeader("Content-Type","text/plain");  
response.addHeader("Content-Disposition","attachment;filename=" + new String(filename.getBytes(),"utf-8"));  
response.addHeader("Content-Length","" + file.length());