文件所在位置:/DownLoadDemo/WebRoot/download/001.jpg
///DownLoadDemo/src/com/huowolf/DownLoadServlet.java
package com.huowolf;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class DownLoadServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
String path = this.getServletContext().getRealPath("/download/001.jpg");
String filename = path.substring(path.lastIndexOf("\\")+1);
//response.setHeader("Content-Type", "application/octet-stream");
response.setContentType("application/x-msdownload");
response.setHeader("Content-Disposition", "attachment;filename="+filename);
InputStream in = null;
OutputStream out = response.getOutputStream();
out.write("下載示例".getBytes());
try {
in = new FileInputStream(path);
int len=-1;
byte buffer[] = new byte[1024];
while((len=in.read(buffer))!=-1) {
out.write(buffer,0,len);
}
} catch (Exception e) {
e.printStackTrace();
}finally {
if(in!=null) {
try {
in.close();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}