j2me与j2ee通信示例(2)

最近在开发j2me与jsp通信传多参数时有点心得，也因网上这类资料比较少所以写下来与大家分享，写得不好之处请大家多指教！
首先当然是要用以下三个类了:
HttpConnection conn = null;//用于连接到web服务
InputStream input = null;//用于接收返回信息
DataOutputStream output =null;//用于发送数据（当然也可以用OutputStream,只是DataOutputStream有更多实用的方法）
然后就是用conn = (HttpConnection)Connector.open(url)方法来建立连接
url是String类型的如
String url="http: //202.103.191.61:80/test.jsp";
string url2="http: //www.express.com/test.jsp";
如果是用ip地址作为参数一定要加上端口号，用网址可不用默认就是80嘛！
接着设置web服务接收的一些参数
           conn.setRequestMethod(HttpConnection.POST);//也可以用get
           conn.setRequestProperty("IF-Modified-Since", "29 May 2004 15:17:19GMT");
           conn.setRequestProperty("User-Agent","Profile/MIDP-1.0Configuration/CLDC-1.0");
           conn.setRequestProperty("Content-Language", "en-CA");
           conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
打开输出流，传数据
           output = c.openDataOutputStream();
           output.writeUTF("&test1="+test1);
           output.writeUTF("&test2="+test2);
           output.writeUTF("&test3="+test3);
           output.writeUTF("&test4="+test4);
           output.flush();
到这里实际上就是我们在浏览器中输入http//202.103.191.61:80/test.jsp&test1=test1&test2=test2&test3=test3&test4=test4
注意到没有test.jsp后面全是&参数名=值第一个不是以?开头(但如果参数是只有一个或两个时可以不第一个不用&都行，不知道为什么)!
然后就是取得返回信息了，
           input = c.openDataInputStream();
           int ch;
    StringBuffer b=new StringBuffer;
           while ((ch = is.read()) != -1) {
           b.append((char) ch);
    System.out.println(b);
           }
最后别忘闭流!
jsp程序里就是用request.getParameter();来取数据，然后进行处理啦，就不多说了!
附j2me源码
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.io.*;
import java.io.*;

public class SendTestMidlet extends MIDlet implementsCommandListener {
    Displaydisplay = null;
    TextFieldttest1,ttest2,ttest3,ttest4;
    Formform;
    String url ="http://202.103.191.61:80/test.jsp";
    static finalCommand send = new Command("注册", Command.OK, 2);
    static finalCommand exit = new Command("退出", Command.EXIT, 2);
    Stringmyname,pas1,pas2,test4;
    publicSendTestMidlet(){
    display = Display.getDisplay(this);
    ttest1 = new TextField("Name:", " ", 25, TextField.ANY);
    ttest2 =new TextField("password:"," ",25,TextField.ANY);
    ttest3 =new TextField("password2:"," ",25,TextField.ANY);
    ttest4 =new TextField("note:"," ",25,TextField.ANY);
    form = new Form("注册信息");
    }
    public voidstartApp() throws MIDletStateChangeException {
    form.append(ttest1);
    form.append(ttest2);
    form.append(ttest3);
    form.append(ttest4);
    form.addCommand(send);
    form.addCommand(exit);
    form.setCommandListener(this);
    display.setCurrent(form);
    }
    public voidpauseApp() {
    }
    public voiddestroyApp(boolean unconditional) {
    notifyDestroyed();
    }
    public voidsendData(String url) throws IOException {
       HttpConnection conn = null;
       InputStream input = null;
       DataOutputStream output = null;
       StringBuffer b = new StringBuffer();
       TextBox t = null;
       try {
           conn = (HttpConnection)Connector.open(url);
           conn.setRequestMethod(HttpConnection.POST);
           conn.setRequestProperty("IF-Modified-Since", "29 Dec 2001 15:17:19GMT");
           conn.setRequestProperty("User-Agent","Profile/MIDP-1.0Configuration/CLDC-1.0");
           conn.setRequestProperty("Content-Language", "en-CA");
           conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
           output = conn.openDataOutputStream();
           output.writeUTF("&name="+myname);
           output.writeUTF("&pas1="+pas1);
           output.writeUTF("&pas2="+pas2);
           output.writeUTF("&test4="+test4);//.getBytes());
           output.flush();
           input = conn.openDataInputStream();
           int ch;
           while ((ch = input.read()) != -1) {
            b.append((char) ch);
            System.out.print((char)ch);
           }
           t = new TextBox("Date", b.toString(), 1024, 0);
           t.setCommandListener(this);
           }
           finally {
            if(input!= null) {
             input.close();
             }
             if(output != null) {
              output.close();
              }
              if(conn != null) {
               conn.close();
               }
               }
       display.setCurrent(t);
    }

    publicvoid commandAction(Command conn, Displayable d) {
    String label = conn.getLabel();
    if(label.equals("exit")) {
        destroyApp(true);
    } else if (label.equals("date?")) {
     myname = ttest1.getString();
     pas1 =ttest2.getString();
     pas2 =ttest3.getString();
     test4 =ttest4.getString();
     try {
      sendData(url);
     }catch(IOException e) {}
    }
    }
}