Java入门级文件下载

文件下载和上一篇文件上传很像，就不多说了，传一个我写的一个下载歌曲的代码：

下面是Servlet代码：

public class DownLoadServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

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

        ServletContext servletContext= request.getServletContext();

        String filename="风吹麦浪.mp3";

        String path=servletContext.getRealPath("/WEB-INF/"+filename);

        File file =new File(path);

        String type=servletContext.getMimeType(path);

        InputStream in = new FileInputStream(file);

        response.setContentType(type);

        filename =new String(filename.getBytes("gbk"),"iso8859-1");

        response.setHeader("Content-Disposition", "attachment;filename"+filename);

        PrintWriter out=response.getOutputStream();

        IOUtils.copy(in, out);
　　　　 in.close();

    }

}

下面是jsp代码：

<body>

    <a href="${pageContext.request.contextPath}/DownLoadServlet">下载</a>

</body>

注意要导入一个io的jar包：

巴特西

Java入门级文件下载_学习笔记

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