struts2的文件下载?

Question

1. 如果是图片, 你要直接输出, 就write到response.getOutputStream
2. 如果是要下载, 下载其实也是一样, 从db读出数据然后输出到response的流中去. 

Answer 1

大致代码如下，请自行修改
public class DownloadFile extends ActionSupport implements ServletResponseAware{
......
    private HttpServletResponse resp;
@Override
public String execute() throws Exception {
resp.setContentType("application/x-msdownload");
resp.setHeader("Content-Disposition", "attachment;" + "filename=" 
+ new String(fileFileName.getBytes(), "iso-8859-1"));
this.xxx = (Xxx)this.myXxxService.get(new Integer(1));
OutputStream os = resp.getOutputStream();
os.write(person.getUploadFile());
os.flush();
return SUCCESS;
}
public void setServletResponse(HttpServletResponse resp) {
// TODO Auto-generated method stub
this.resp = resp;
}
......
}