j2me 调用 webservice

客户端

客户端自然是用MIDlet了，不过用什么方式来访问web service呢？其实有3种访问方式

直接用HttpConnection访问 http://localhost:7001/jagiews/services/StringProcess?method=process&name=qqqq，得到xml的返回数据，然后用kxml(http://kxml.enhydra.org/)解析，得到返回值。

如果你的手机支持MIDP2.0的话，可以考虑使用JSR172。

用ksoap api。

这里讲述第三种方式。使用之前，你需要从 http://ksoap.enhydra.org/software/downloads/index.html下载稳定的ksoap包，置于你的classpath中。

2.1 客户端源代码

2.1.1 WSClientMIDlet.java

package com.jagie.j2me.ws; 

import javax.microedition.midlet.*; 
import javax.microedition.lcdui.*; 

public class WSClientMIDlet extends MIDlet{

    static WSClientMIDlet instance;

    public WSClientMIDlet() { 
        instance = this; 
    } 
    
    public void startApp() { 
        Display display=Display.getDispla(this);
        DisplayForm displayable = new DisplayForm(); 
        display.setCurrent(displayable);
    } 

    public void pauseApp() { } 

    public void destroyApp(boolean unconditional) { } 

    public static void quitApp() { 
        instance.destroyApp(true); 
        instance.notifyDestroyed(); 
        instance = null;
    } 

}

2.1.2DisplayForm.java

package com.jagie.j2me.ws;

import javax.microedition.lcdui.*;

public class DisplayForm extends Form implements CommandListener,Runnable{
    private TextField textField1;  
    private Thread t;  
    public DisplayForm(){    
        super("字符转换webservice测试"); 
  
        try  {      
               jbInit();   
        }    
       catch (Exception e) {      
           e.printStackTrace();    
        }  
    }  

    private void jbInit() throws Exception {    
    // Set up this Displayable  to listen to command events  

        textField1 = new TextField ("", "", 15, TextField.ANY); 
        this.setCommandListener(this);    
        textField1.setLabel ("待处理的字符串是：");    
        textField1.setConstraints (TextField.ANY);
        textField1.setInitialInputMode ("Tester");   
        setCommandListener(this);    
        // add the Exit command    
        addCommand(new Command ("Exit", Command.EXIT, 1));    
        addCommand(new Command ("Process", Command.OK, 1));    
        this.append(textField1);  

    }  

    public void commandAction (Command command,  Displayable displayable){ 
        if (command.getCommandType () == Command.EXIT) {
             WSClientMIDlet.quitApp();
        }   
        else if (command.getCommandType()  == Command.OK) {
             t = new Thread(this);      
             t.start();    
        }  
    }  

    public void run(){
        String s1 = textField1.getString();   
        String s2 = new StringProcessorStub().process(s1);    
        StringItem resultItem = new StringItem("处理后的字符串是:", s2);
        this.append(resultItem);
   }

}

2.1.3StringProcessorStub.java

package com.jagie.j2me.ws; 

import org.ksoap.*; 
import org.ksoap.transport.HttpTransport; 

public class StringProcessorStub { 

    public StringProcessorStub() { 
    } 

    public String process(String name) { 
        String result = null; 
        try { 
            SoapObject rpc = new SoapObje("http://localhost:7001/jagiews/services/StringProcess", "process"); 
            rpc.addProperty("name", name); 
            HttpTransport ht = new HttpTransport ("http://localhost:7001/jagiews/services/StringProcess", ""); 
            result = (String) ht.call(rpc); 
        } 
        catch (Exception e) { 
            e.printStackTrace(); 
        } 

        return result; 
     } 

}

测试客户端

现在，试着在你的ide里运行WSClientMIDlet，如果调用成功，则出现以下画面：