(十)

一. 创建 download.jsp ( name 即为要下载的文件名称)

</head>
<body>
    <a href="${pageContext.request.contextPath}/download/test1?name=sample.txt">下载</a>
</body>
</html>

二. 创建 DownloadController.java

@Controller
@RequestMapping("/download")
public class DownloadController {

    @ RequestMapping("/test1")
    public void test1(String name, HttpSession session, HttpServletResponse response) throws IOException {
        String realPath = session.getServletContext().getRealPath("/upload");
        String filePath = realPath + "\" + name;

        System.out.println("要下载的文件: " + filePath);
        //设置响应头, 告知浏览器, 要以附件的新试保存文件, filename=浏览器显示的下载文件名
        response.setHeader("content-disposition", "attachment;filename=" + name);

        //响应
        IOUtils.copy(new FileInputStream(filePath), response.getOutputStream());

        // return null
    }
}

三. 准备好待下载的文件:

四. 操作下载