字符编码集所占用的字节数

public class test1{
	public static void main(String [] args)throws UnsupportedEncodingException  {
		
		System.out.println("妖术".getBytes("ISO8859-1").length);
		System.out.println("妖术".getBytes("GBK").length);
		System.out.println("妖术".getBytes("GB2312").length);
		System.out.println("妖术".getBytes("utf-8").length);
	}
	
}
结果：
2
4
4
6

"ISO8859-1"占一个字符
GBK、GBK312占两个字符
utf-8占3个字符