HTML中字符大小写转换(java)

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader; 

/** *//**
 * 将HTML中<  >中的字母大小写进行转换
 * @author 
 *
 */
public class ExchangeCase{
    public static void main(String args[]) throws IOException{
        
        boolean aFlg = false;//判斷"<>"用;
        int intCount = 0;//计算"<>"用;
        int intLine=0;//行数
        String strCurrentLine=null;//当前行
        String []dataSave = new String[10000];//将读到的每一行放进一个数组
        try {
            BufferedReader BRead = new BufferedReader(new InputStreamReader(
                    new FileInputStream("C:/Html.html") ));//读取文件
         
            BufferedWriter BWriter=new BufferedWriter(new FileWriter("C:/Html2.txt"));//转成后放到此文件
         
             while((strCurrentLine=BRead.readLine())!=null){
                 dataSave[intLine]=strCurrentLine;
                 intLine=intLine+1;
             }
             //System.out.println("総行数="+intLine);
             for(int i=0; i<intLine;i++){
                aFlg = false;
                intCount = 0;
                for (int j = 0; j < dataSave[i].length(); j++) {
                    char cByte = dataSave[i].charAt(j);
                    if (cByte == '<' && intCount == 0) {
                        aFlg = true;
                    }
                    if (cByte == '<') {
                        ++intCount;
                    }
                    if (cByte == '>') {
                        --intCount;
                    }
                    if (cByte == '>' && intCount == 0) {
                        aFlg = false;
                    } 

                    if (aFlg && intCount > 0) {
                        //转成小写  
                        if (cByte >= 'A' && cByte <= 'Z') {    //大写: cByte >= 'a' && cByte <= 'z'
                            cByte += 32;                            //大写: cByte -= 32;
                            // System.out.print(cByte);
                            BWriter.write(cByte);
                            continue;
                        } else {
                            // System.out.print(cByte);
                            BWriter.write(cByte);
                            continue;
                        }
                    }
                    // System.out.print(cByte);
                    BWriter.write(cByte);
                }
                // System.out.println();
                BWriter.newLine();
             }
             BRead.close();
             BWriter.close();
         
        } 
        catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
 
}