Integer.toHexString(a[i]&oxFF)用法

Integer.toHexString(a[i]&oxFF)转换为十六进制字符串

public class ByteTransHex {
public static void main(String[] args) {
// TODO Auto-generated method stub
byte[] src = new byte[] { 1, 2, 3, 4 };
System.out.println(bytesToHexString(src));
System.out.println(bytesToHexStrings(src)[2]);
}

        //将字节数组转换为String类型
public static String bytesToHexString(byte[] src) {
StringBuilder stringBuilder = new StringBuilder();
if (src == null || src.length <= 0) {
return null;
}
for (int i = 0; i < src.length; i++) {
int v = src[i] & 0xFF;
String hv = Integer.toHexString(v);
if (hv.length() < 2) {
stringBuilder.append(0);
}
stringBuilder.append(hv);
}
return stringBuilder.toString();
}

//将字节数组转换为字符数组
public static String[] bytesToHexStrings(byte[] src) {
if (src == null || src.length <= 0) {
return null;
}
String[] str = new String[src.length];
for (int i = 0; i < src.length; i++) {
int v = src[i] & 0xFF;
String hv = Integer.toHexString(v);
if (hv.length() < 2) {
str[i] = "0";
}
str[i] = hv;
}
return str;
}
}