Struts2文件下载

 1 package cn.temp;
 2 
 3 import java.io.FileInputStream;
 4 import java.io.InputStream;
 5 import java.net.URLEncoder;
 6 
 7 import org.apache.struts2.ServletActionContext;
 8 
 9 import com.opensymphony.xwork2.ActionContext;
10 import com.opensymphony.xwork2.ActionSupport;
11 
12 public class ThreeAction extends ActionSupport {
13     // 1: 开发execute方法，如果execute方法正常执行成功，则返回successs/down
14     // 只有返回string以后才会去下载
15     @Override
16     public String execute() throws Exception {
17         System.err.println("判断用户的积分...");
18         //对名称进行编码
19         String str = "倒霉.mp4";
20         str = URLEncoder.encode(str, "UTF-8");
21         ActionContext.getContext().put("name", str);
22         return "down";
23     }
24 
25     // 2:如果返回到了<result name="down" type="stream"/>
26     // 此时就会开始调用getInputSteam方法获取文件的二进制数据
27     public InputStream getFile() throws Exception {
28         String path = ServletActionContext.getServletContext().getRealPath("/files/dmx1.mp4");
29         InputStream in = new FileInputStream(path);
30         return in;
31     }
32 }