java - 将发布数据从一个 java servlet 写入另一个

Question

我正在尝试编写一个 servlet，它将通过 POST 将 XML 文件(xml 格式的字符串)发送到另一个 servlet。(非必要的 xml 生成代码替换为“你好”)

   StringBuilder sb=  new StringBuilder();
    sb.append("Hello there");

    URL url = new URL("theservlet's URL");
    HttpURLConnection connection = (HttpURLConnection)url.openConnection();                
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Content-Length", "" + sb.length());

    OutputStreamWriter outputWriter = new OutputStreamWriter(connection.getOutputStream());
    outputWriter.write(sb.toString());
    outputWriter.flush();
    outputWriter.close();

这会导致服务器错误，并且永远不会调用第二个 servlet。

Answer 1

使用像 HttpClient 这样的库，这种事情要容易得多.甚至还有一个 post XML code example :

PostMethod post = new PostMethod(url);
RequestEntity entity = new FileRequestEntity(inputFile, "text/xml; charset=ISO-8859-1");
post.setRequestEntity(entity);
HttpClient httpclient = new HttpClient();
int result = httpclient.executeMethod(post);