将文本里的内容转换为小写

public static void main(String[] args) {

		try {
			File file  = new File("c:\\old.sql");
			FileReader fr = new FileReader(file);

			FileWriter fw = new FileWriter("c:\\new.sql");
			char[] bt = new char[1024];
			int count;
			while ((count = fr.read(bt)) > 0) {
				String str = new String(bt).toLowerCase();//将old.sql中的内容转化为小写
				bt = str.toCharArray();
				fw.write(bt, 0, count); // 重点
			}
			fr.close();
			fw.close();
		} catch (IOException e) {
			e.printStackTrace();
		}

		System.out.println("finished...");
	}