struts2配置result type=json 显示下载文件,加上<param name="contentType">text/html</param>
如:
<result name="success" type="json">
<param name="contentType">text/html</param> <param name="root">annex</param> <param name="noCache">true</param> <param name="ignoreHierarchy">true</param> </result>
不用struts2配置的
response.setContentType("text/html") ;