读取内存卡的文件方法.doc

J2ME读取手机内存卡里的文本文件.txt【原创】2009-04-01 15:47/* To change this template, choose Tools | Templates* and open the template in the editor.* 2009-03-19 10:12*/package Forms;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import javax.microedition.io.Connection;import javax.microedition.io.Connector;import javax.microedition.io.file.FileConnection;/* 专门用来读取内存卡里的.txt文件* author Acheng*/public class ReadTextForm implements Runnable /* * 文件路径 */ private String ref = null; /* * 读文件的线程 */ private Thread readThread; /* * 用来保存读取到的文本 */ private String s = null; public ReadTextForm() /* * 启动该线程 * param ref 要读取的文件路径，比如读取内存卡里的help_en.txt文件路径:file:/localhost/e:/SmartMacau/main/help_en.txt */ public void startThread( String ref ) this.ref = ref; if( readThread != null ) readThread = null; readThread = new Thread( this ); readThread.start(); public void run() InputStream in = null; Connection conn = null; ByteArrayOutputStream baos = null; if( ref.startsWith( file: ) )/读内存卡里的文件 try conn = ( FileConnection ) Connector.open( ref ); in = ( ( FileConnection ) conn ).openInputStream();/ in.skip( 2 ); baos = new ByteArrayOutputStream(); int ch = 0; while( ( ch = in.read() ) != -1 ) baos.write( ch ); byte tmp = baos.toByteArray(); /UTF-8编码,中文时,文件开头是框框,英文不会出现这个情况 s = new String( tmp, UTF-8 ); /跳过文件开头的框框 if( tmp0 = -17 & tmp1 = -69 & tmp2 = -65 ) s = s.substring( 1 ); / String s = new String(baos.toString().getBytes(ISO8859_1),GBK);/乱码/ String s = new String(baos.toString().getBytes(ISO8859_1),UTF-8);/文件开头是框框/ String s = baos.toString();/乱码/ String s = new String( tmp); catch( IOException ex ) ex.printStackTrace(); finally if( baos != null ) try baos.close(); catch( IOException ex ) ex.printStackTrace(); baos = null; if( in != null ) try in.close(); catch( IOException ex ) ex.printStackTrace(); in = null; if( conn != null ) try conn.close(); catch( IOException ex ) ex.printStackTrace(); conn = null; else System.out.println( ReadText