.java文件的ANSI编码转换为UTF-8编码

/*
 * 创建于：2012-09-07
 * 
 * 功能：转换ANSI【JAVA中GBK编码】编码的.java源文件为UTF-8格式，未处理异常，运行前确认目录存在，且原编码格式为ANSI
 * 
 * @author bwgang
 */
package bwgang;


import java.io.*;
import java.util.Vector;


public class AnsiToUtf8 {


public static void main(String[] args) throws UnsupportedEncodingException, IOException {

ReadFileName tmp=new ReadFileName();
Vector<String> vec=tmp.FileNameOftype("E:\\workspace\\Interface_JAVA\\src", ".java");

for (int i=0;i<vec.size(); i++){
System.out.println(vec.get(i));
change(vec.get(i));
}

}


public static void change(String filepath) throws UnsupportedEncodingException, IOException{
BufferedReader buf = null;
OutputStreamWriter pw=null;
String str = null;
String allstr="";

//用于输入换行符的字节码
byte[] c=new byte[2];
        c[0]=0x0d;
        c[1]=0x0a;
        String t=new String(c);

        buf=new BufferedReader(new InputStreamReader(new FileInputStream(filepath), "GBK"));
while((str = buf.readLine()) != null){
allstr=allstr+str+t;
}

buf.close();

pw =new OutputStreamWriter(new FileOutputStream(filepath),"UTF-8");
pw.write(allstr); 
pw.close();
}

}







class ReadFileName {

//存储遍历获取的所有文件名
private  Vector<String> filelist = new Vector<String>(); 


//遍历指定路径下的所有文件
//以ArrayList存储于filelist中
private  void RefreshFileList(String strpath) { 
        File dir = new File(strpath); 
        File[] files = dir.listFiles(); 


        if (files == null) 
            return; 
        for (int i = 0; i < files.length; i++) { 
            if (files[i].isDirectory()) { 
                RefreshFileList(files[i].getAbsolutePath()); 
            } else { 
                //String strFileName = files[i].getAbsolutePath().toLowerCase();             
                filelist.add(files[i].getAbsolutePath());                    
            }     
        }      
}

    //过滤当前目录下的指定后缀名的文件
     //返回Vector
    public  Vector<String> FileNameOftype(String strpath2,String filetype){
    String strfilename=new String();
    Vector<String> filelistofjava= new Vector<String>(); 

    //读取指定路径下的所有文件
    RefreshFileList(strpath2);

    for (int i = 0; i < filelist.size(); i++) {
    strfilename=filelist.get(i).toString();
    strfilename=strfilename.substring(strfilename.length()-5, strfilename.length());

    if (strfilename.equals(filetype)) {
    filelistofjava.add(filelist.get(i));        
    }    
    }
    return filelistofjava;
    }

}