我遇到了一个需要解决的问题。我必须上传xml文件的特定元素以将其上传到服务器,设法做到这一点,然后我创建了一个演示方法来检查文件是否正在上传到服务器。
我的xml文件具有结构
<config>
<engine>
<eid>1</eid>
<sometextelement>text</sometextelement>
</engine>
<engine>
<eid>2</eid>
<sometextelement>text</sometextelement>
</engine>
<engine>
<eid>3</eid>
<sometextelement>text</sometextelement>
</engine>
</config>
这是我的servlet代码:
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doPost(request,response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.setContentType("application/json");
//response.setHeader("Cache-Control", "no-cache");
PrintWriter out = response.getWriter();
JSONObject obj = new JSONObject();
String value = request.getParameter("value");
String message = "";
String update = "";
Element element = null;
Element root = null;
XMLOutputter xmlOutputter = new XMLOutputter();
try{
doc = saxBuilder.build("E:/workbench j2ee/cPEP_UI/WebContent/engine.xml");
}catch(Exception e){
e.printStackTrace();
}
root = doc.getRootElement();
List list = doc.getRootElement().getChildren();
Iterator itr = list.iterator();
while(itr.hasNext()){
element = (Element)itr.next();
System.out.println("Entered 1");
File f = File.createTempFile("engine_",".xml");
System.out.println(f);
xmlOutputter.output(element, new FileWriter(f));
putFile(f);
}
// xmlOutputter.output(doc, new FileWriter("E:/workbench j2ee/cPEP_UI/WebContent/engine.xml"));
// System.out.println("hello from system");
// out.println("hello");
}
public void putFile(File f){
System.out.println("File String: "+f.toString());
Connection Conn = null;
try {
Conn = new Connection("ftp.someserver.co.uk",22);
ConnectionInfo info = Conn.connect();
Conn.authenticateWithPassword("webmaster@someserver.co.uk", "mypass");
SCPClient SCP = new SCPClient(Conn);
SCP.put(f.toString(), "/public_html/webmaster", "0755");
Conn.close();
} catch (Exception e) {
try {
Conn.close();
} catch (Exception e1) {}
}
}
现在,从上面的代码我得到了为引擎1,引擎2和引擎3创建的文件,这就是我想要的,但现在我也希望它上传到服务器。并且putFile代码根本不起作用。没有显示错误,传递和用户名都很好,服务器名也是如此。港口也很完美。什么错了呢? 任何想法?
继承错误:
java.io.IOException: There was a problem while connecting to ftp.someserver.co.uk:22
at ch.ethz.ssh2.Connection.connect(Connection.java:699)
at ch.ethz.ssh2.Connection.connect(Connection.java:490)
at Push_Individual_Engine.putFile(Push_Individual_Engine.java:106)
at Push_Individual_Engine.doPost(Push_Individual_Engine.java:81)
at Push_Individual_Engine.doGet(Push_Individual_Engine.java:47)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at ch.ethz.ssh2.transport.TransportManager.establishConnection(TransportManager.java:340)
at ch.ethz.ssh2.transport.TransportManager.initialize(TransportManager.java:448)
at ch.ethz.ssh2.Connection.connect(Connection.java:643)
... 18 more
答案 0 :(得分:2)
您需要在远程计算机的PasswordAuthentication = yes
文件中设置sshd_config
。
答案 1 :(得分:1)
显示没有错误的可能原因是您丢弃例外。如果您放弃例外,您应该期望得到“不起作用,但没有显示错误”问题。相反,您应该在catch块中打印堆栈跟踪,如下所示:
e.printStackTrace();
或记录异常,或重新抛出异常。这是三个标准选择。