下載

 

package cn.lxl.servlet;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;

import javax.print.DocFlavor.URL;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Servlet4 extends HttpServlet {
    private static final long serialVersionUID = 1L;

    public Servlet4() {
        super();
    }

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        response.setHeader("Content-Type", "text/html;charset=utf-8");
        response.setCharacterEncoding("utf-8");

        // 取得文件路徑
        String path = this.getServletContext().getRealPath(
                File.separator + "download" + File.separator + ".大漠風情if");
        // 取得文件名稱
        String name = path.substring(path.lastIndexOf(File.separator) + 1);
        /*
         *
         * @param Content-Disposition 激活文件下載對話框
         *
         * @param attachment:filename 用這個文件自動填充文件名框
         */
        response.setHeader("Content-Disposition", "attachment;filename="
                + URLEncoder.encode(name, "utf-8"));

        InputStream in = null;
        OutputStream os = null;
        byte[] b = new byte[1024*1024];
        int len = 0;

        in = new FileInputStream(path);
        os = response.getOutputStream();
        while ((len = in.read()) > 0) {
            os.write(b, 0, len);
        }
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

    }

}