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J2me访问dotnetwerbservice[分享] Post by: chinapeople @ 2003-9-21 12:51:55 1.思路：使用j2me中本身自带的HttpConnection访问webservice，调用http://localhost/RoadWebService/RoadWS.asmx/中的方式WebServiceTest，参数为param。如下： private void connect() { HttpConnection hc = null; //InputStream in = null; DataInputStream in = null; String s=""; String url = "http://localhost/RoadWebService/RoadWS.asmx/WebServiceTest?param="+inputTextField.getString(); try { hc = (HttpConnection)Connector.open(url); int ch; in = hc.openDataInputStream(); while((ch=in.read())!=-1){ s=s+(char)ch; } //String s = in.readUTF(); in.close(); hc.close(); mMessageItem.setText(s); } catch (IOException ioe) { mMessageItem.setText(ioe.toString()); } // mDisplay.setCurrent(mMainform); String [] items; //此处是对的到的字符串S进行XML解析。 items = parseUsingkXML( s ); mDisplay.setCurrent( new ItemList( items ) ); } 这时候的到的字符串流是XML格式的，如下： hello zl 使用第三方的CLDC ?h境下咦鞯拈_放原始瘁 XML 分析器 ── kXML，?? http://www.kxml.org/ 下蒌 kXML 包。对获取的XML格式的数据流进行解析，方式如下： private String[] parseUsingkXML( String xml ){ try { ByteArrayInputStream bin = new ByteArrayInputStream( xml.getBytes() ); InputStreamReader in = new InputStreamReader( bin ); XmlParser parser = new XmlParser( in ); Vector items = new Vector(); parsekXMLItems( parser, items ); System.out.println(items.size()); String[] tmp = new String[ items.size() ]; items.copyInto( tmp ); return tmp; } catch( IOException e ){ return new String[]{ e.toString() }; } } private void parsekXMLItems( XmlParser parser, Vector items ) throws IOException { boolean inItem = false; while( true ){ ParseEvent event = parser.read(); switch( event.getType() ){ case Xml.START_TAG: if( event.getName().equals( "string" ) ){ inItem = true; } break; case Xml.END_TAG: if( event.getName().equals( "string" ) ){ inItem = false; } break; case Xml.TEXT: if( inItem ){ items.addElement( event.getText() ); } break; case Xml.END_DOCUMENT: return; } } } class ItemList extends List implements CommandListener { ItemList( String[] list ){ super( "Items", IMPLICIT, list, null ); addCommand( mExitCommand ); setCommandListener( this ); } public void commandAction( Command c, Displayable d ){ if( c == mExitCommand ){ exitMIDlet(); } } } 经过函数parsekXMLItems的解析后数据将输出至Items中，并用于显示。 附录1： dotnet中的webservice的方式webservicetest(详细的建立一个dotnetwebservie请参考其他资料)： Public Function WebServiceTest(ByVal param As String) As String If param = "cqy" Then WebServiceTest = "hello cqy" ElseIf param = "zl" Then WebServiceTest = "hello zl" ElseIf param = "zy" Then WebServiceTest = "hello zy" Else WebServiceTest = "who are you" End If End Function 附录2 客户端j2me源代码：// HttpMidlet.java import java.io.*; import java.util.*; import javax.microedition.io.*; import javax.microedition.lcdui.*; import javax.microedition.midlet.*; import org.kxml.*; import org.kxml.parser.*; public class HttpMidlet extends MIDlet implements CommandListener { private Display mDisplay; private Form mMainform; private StringItem mMessageItem; private Command mExitCommand, mConnectCommand; private final TextField inputTextField; public HttpMidlet() { mMainform = new Form("HitMIDlet"); mMessageItem = new StringItem(null, ""); mExitCommand = new Command("退出", Command.EXIT, 0); mConnectCommand = new Command("连接", Command.SCREEN, 0); mMainform.append(mMessageItem); inputTextField = new TextField("Input text","", 128,TextField.ANY); mMainform.append(inputTextField); mMainform.addCommand(mExitCommand); mMainform.addCommand(mConnectCommand); mMainform.setCommandListener(this); } public void startApp() { mDisplay = Display.getDisplay(this); mDisplay.setCurrent(mMainform); } public void exitMIDlet(){ notifyDestroyed(); } public void pauseApp() {} public void destroyApp(boolean unconditional) {} public void commandAction(Command c, Displayable s) { if (c == mExitCommand) notifyDestroyed(); else if (c == mConnectCommand) { Form waitform = new Form("Waiting..."); mDisplay.setCurrent(waitform); Thread t = new Thread() { public void run() { connect(); } }; t.start(); } } private void connect() { HttpConnection hc = null; //InputStream in = null; DataInputStream in = null; String s=""; String url = "http://localhost/RoadWebService/RoadWS.asmx/WebServiceTest?param="+inputTextField.getString(); try { hc = (HttpConnection)Connector.open(url); int ch; in = hc.openDataInputStream(); while((ch=in.read())!=-1){ s=s+(char)ch; } //String s = in.readUTF(); in.close(); hc.close(); mMessageItem.setText(s); } catch (IOException ioe) { mMessageItem.setText(ioe.toString()); } // mDisplay.setCurrent(mMainform); String [] items; items = parseUsingkXML( s ); mDisplay.setCurrent( new ItemList( items ) ); } private String[] parseUsingkXML( String xml ){ try { ByteArrayInputStream bin = new ByteArrayInputStream( xml.getBytes() ); InputStreamReader in = new InputStreamReader( bin ); XmlParser parser = new XmlParser( in ); Vector items = new Vector(); parsekXMLItems( parser, items ); System.out.println(items.size()); String[] tmp = new String[ items.size() ]; items.copyInto( tmp ); return tmp; } catch( IOException e ){ return new String[]{ e.toString() }; } } private void parsekXMLItems( XmlParser parser, Vector items ) throws IOException { boolean inItem = false; while( true ){ ParseEvent event = parser.read(); switch( event.getType() ){ case Xml.START_TAG: if( event.getName().equals( "string" ) ){ inItem = true; } break; case Xml.END_TAG: if( event.getName().equals( "string" ) ){ inItem = false; } break; case Xml.TEXT: if( inItem ){ items.addElement( event.getText() ); } break; case Xml.END_DOCUMENT: return; } } } class ItemList extends List implements CommandListener { ItemList( String[] list ){ super( "Items", IMPLICIT, list, null ); addCommand( mExitCommand ); setCommandListener( this ); } public void commandAction( Command c, Displayable d ){ if( c == mExitCommand ){ exitMIDlet(); } } } } 用wtk2.0建立project,名称为HttpMidlet，类名称为HttpMidlet 将HttpMidlet.java文件拷贝至wtk目录下的appsHttpMidlet的src目录下，将第三方kxml文件ksoap-midp.zip拷贝至apps HttpMidletlib目录下，编译即可。 返回类别: 教程 上一教程: 具体讲述JSP、PHP与JAVA融合的开发环境 下一教程: JDBC3.0有什么新特性 您可以阅读与"J2ME访问DOTNETWERBSERVICE"相关的教程: · 使用JDBC创建数据库访问程序 · BEAN里对多个数据库的访问示例 · 用JDBC访问一个数据库 · 我的J2ME作品－兄弟连 · J2ME游戏开发学习之高效&美丽显示积分 |
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