J2ME——MIDP。向服务器发出 POST 请求时出现错误（HTTP 操作中出现 40 错误）

Question

我尝试运行从本教程复制的代码
http://www.developer.nokia.com/Community/Wiki/How_to_use_Http_POST_request_in_Java_ME

但是当我运行它时，我在源代码行中遇到异常

 dis = new DataInputStream(hc.openInputStream());


java.io.IOException: 40-Error in HTTP operation
    at com.sun.midp.io.j2me.http.Protocol.checkForException(+51)
    at com.sun.midp.io.j2me.http.Protocol.readResponseMessage_wap(+38)
    at com.sun.midp.io.j2me.http.Protocol.connect_wap(+649)
    at com.sun.midp.io.j2me.http.Protocol.connect(+107)
    at com.sun.midp.io.j2me.http.Protocol$PrivateOutputStream.flush(+39)
    at java.io.DataOutputStream.flush(DataOutputStream.java:106)
    at com.orionsource.onlinenards.api.API.sendPostRequest(API.java:221)
    at com.orionsource.onlinenards.api.API.helloApiWithParams(API.java:259)
    at com.orionsource.onlinenards.OnLineNards.startApp(OnLineNards.java:33)
    at javax.microedition.midlet.MIDletProxy.startApp(+7)

如何解决这个问题？

Answer 1

一些示例代码。它会对你有所帮助。

HttpConnection hc=(HttpConnection)Connector.open(url);
DataInputStream dis = fc.openDataInputStream();