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  • DWR第六篇之文件下载

    1. 在第五篇架构基础上进行修改

    2. 修改jsp页面

     1 <html>
     2 <head>
     3 <base href="<%=basePath%>">
     4 
     5 <title>dwr</title>
     6 <script type='text/javascript' src='dwr/engine.js'></script>
     7 <script type='text/javascript' src='dwr/util.js'></script>
     8 <script type='text/javascript' src='dwr/interface/CoreServlet.js'></script>
     9 </head>
    10 <body>
    11 
    12     <a id="fileName" href="javascript:downloadFile('E://main.jpg');">点击下载</a>
    13 
    14 </body>
    15 <script type="text/javascript">
    16     function downloadFile(fileUrl) {
    17         CoreServlet.downloadFile(fileUrl, function(data) {
    18             dwr.engine.openInDownload(data);
    19         });
    20     }
    21 </script>
    22 </html>

    3. 编写后台代码:

     1 public class CoreServlet {
     2 
     3     public FileTransfer downloadFile(String fileUrl) throws Exception {
     4         String fileName = fileUrl.substring(fileUrl.lastIndexOf("//") + 2, fileUrl.length());
     5         File file = new File(fileUrl);
     6         FileInputStream fis = new FileInputStream(file);
     7         return new FileTransfer(fileName, "text/plain", file.length(), fis);
     8     }
     9 
    10 }
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  • 原文地址:https://www.cnblogs.com/Oven5217/p/7473433.html
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