jsp页面怎么传文件路径形式的字符串给servlet，然后使servlet用浏览器下载这个文件路径字符串指向的文件到客户端？

weixin_38974328 2017-12-02 02:45:43

我写了一下相关的代码，在hsp页面端点击一个按钮，该按钮的点击事件执行时，通过ajax把文件名传到servlet，servlet没有报异常，但是浏览器就不弹出下载文件提示。这个要怎么解决。正确的代码是什么





$("#btn").click(function() {

		$.ajax({

				type: "GET",

				url: "http://127.0.0.1:8080/javaWebDome/DownloadFileServlet",

				data: "downFile="+"1.txt",

				success: function(data,text,jqHR){

				},

				 error: function(data,text,jqHR)

				 {

					   alert("错误");

				 },

		})

		

	});



public void doGet(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {

		

	String fileName=request.getParameter("downFile");

        System.out.println(fileName);  //这里能输出

	response.setCharacterEncoding("UTF-8");

        response.setContentType("text/html;charset=UTF-8");

        request.setCharacterEncoding("UTF-8");

        PrintWriter out = response.getWriter();

        response.setContentType("APPLICATION/OCTET-STREAM");



        String dowmName="下载"+fileName.substring(fileName.lastIndexOf("."));

        response.setHeader("Content-Disposition", "attachment; filename=\""+new String(dowmName.getBytes("utf-8"),"ISO-8859-1")+"\"");

        FileInputStream fileInputStream = new FileInputStream("f:/aaa/"+fileName);

        int i = 0;

        while ((i = fileInputStream.read()) != -1) {

            out.write(i);

        }

        fileInputStream.close();

        out.close();

		

	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)

			throws ServletException, IOException {

		doGet(request,response);

		

	}