解决J2ME联网时出现的中文乱码问题

package hello;

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;

import javax.microedition.io.*;

import java.io.*;

public class Midlet extends MIDlet{

    private Display display;

    public Midlet(){

     display = Display.getDisplay(this);

    }

    public void startApp(){

     try{

     String uURL ="http://3g.pp.cn/phone/app/gpcx.jsp?sid=1182917775043&dirid=03311317&gpdm=600156";

     StringBuffer responseMessage = new StringBuffer();

     HttpConnection hc = (HttpConnection)Connector.open(uURL, Connector.READ_WRITE);

        hc.setRequestMethod(HttpConnection.POST);

        DataOutputStream dos = hc.openDataOutputStream();   

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

        //-------------------------关键代码--------------------------------

        byte []str=new byte[1000];//从内存申请空间

        dis.read(str);//把读取返回的信息保存在str中   

        String content= BytesToString(str);//把str转换为字符串

        //-------------------------关键代码--------------------------------           

     Form f = new Form("HTTP Test");

     f.append(content);

     display.setCurrent(f);

        }catch(Exception e){

        }

    }

//-----------------------关键函数-----------------------------

 public String BytesToString(byte[] rec) { //从字节读取内容

ByteArrayInputStream bais = new ByteArrayInputStream(rec);

DataInputStream dis = new DataInputStream(bais);

String BTS=null;

try {

BTS=new String(rec,"UTF-8");

bais.close();

dis.close();

} catch (Exception e) {

e.printStackTrace();

}

return  BTS;

}

//-----------------------关键函数-----------------------------

    public void pauseApp(){

    }

    public void destroyApp(boolean unconditional){

    }

}