Content-Disposition 响应头，设置文件在浏览器打开还是下载(pdf文件在浏览器预览功能)

你的名字 2024-02-19 13:19 36阅读 0赞

Content-Disposition 属性是作为对下载文件的一个标识字段，在rfc2616 [http://www.rfc-editor.org/rfc/rfc2616.pdf][http_www.rfc-editor.org_rfc_rfc2616.pdf] 章节19.5 Additional Features中

有介绍，具体介绍请看 [http://www.rfc-editor.org/rfc/rfc1806.txt][http_www.rfc-editor.org_rfc_rfc1806.txt]

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

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());

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW94aW9uZ19qaWF4aW4_size_16_color_FFFFFF_t_70][]

attachment：弹出对话框让用户下载

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());

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW94aW9uZ19qaWF4aW4_size_16_color_FFFFFF_t_70 1][]

[http_www.rfc-editor.org_rfc_rfc2616.pdf]: http://www.rfc-editor.org/rfc/rfc2616.pdf
[http_www.rfc-editor.org_rfc_rfc1806.txt]: http://www.rfc-editor.org/rfc/rfc1806.txt
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW94aW9uZ19qaWF4aW4_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/50c6e1914c4d47858bae62d824c45ff3.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW94aW9uZ19qaWF4aW4_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/c2052e68ff1b40fc9913633cb4c46b1c.png