String类型 16进制编码解码

private static String hexString="0123456789ABCDEF";

public static String strEncode10_16(String str10) {
        byte[] bytes=str10.getBytes(); 
        StringBuilder sb= new StringBuilder(bytes.length * 2);
        
        for(int i=0;i<bytes.length;i++) 
        { 
            sb.append(hexString.charAt((bytes[i]&0xf0)>>4)); 
            sb.append(hexString.charAt((bytes[i]&0x0f)>>0)); 
        } 
        return sb.toString();     
    }
    
    public static String strDecode16_10(String str16) {
        
        ByteArrayOutputStream baos=new ByteArrayOutputStream(str16.length()/2);
        
        for(int i=0;i<str16.length();i+=2) 
            baos.write((hexString.indexOf(str16.charAt(i)) << 4 | hexString.indexOf(str16.charAt(i+1)))); 
            return new String(baos.toByteArray());     
    }