![java中如何将byte[]里面的数据转换成十六进制？,第1张](/aiimages/java%E4%B8%AD%E5%A6%82%E4%BD%95%E5%B0%86byte%5B%5D%E9%87%8C%E9%9D%A2%E7%9A%84%E6%95%B0%E6%8D%AE%E8%BD%AC%E6%8D%A2%E6%88%90%E5%8D%81%E5%85%AD%E8%BF%9B%E5%88%B6%EF%BC%9F.png "java中如何将byte[]里面的数据转换成十六进制？,第1张")
方法如下：
/* *
* Convert byte[] to hex string.这里我们可以将byte转换成int，然后利用Integer.toHexString(int)
*来转换成16进制字符串。
* @param src byte[] data
* @return hex string
*/
public static String bytesToHexString(byte[] src){
StringBuilder stringBuilder = new StringBuilder("")
if (src == null || src.length <= 0) {
return null
}
for (int i = 0i <src.lengthi++) {
int v = src[i] &0xFF
String hv = Integer.toHexString(v)
if (hv.length() <2) {
stringBuilder.append(0)
}
stringBuilder.append(hv)
}
return stringBuilder.toString()
}
此方法能将byte[]转化成16进制字符串，
Java是一门面向对象编程语言，不仅吸收了C++语言的各种优点，还摒弃了C++里难以理解的多继承、指针等概念，因此Java语言具有功能强大和简单易用两个特征。Java语言作为静态面向对象编程语言的代表，极好地实现了面向对象理论，允许程序员以优雅的思维方式进行复杂的编程。
private static String hexString = "0123456789ABCDEF"public static void main(String[] args) {System.out.println(encode("中文")) System.out.println(decode(encode("中文")))}/* * 将字符串编码成16进制数字,适用于所有字符（包括中文） */public static String encode(String str) {// 根据默认编码获取<a href="https://www.baidu.com/s?wd=%E5%AD%97%E8%8A%82%E6%95%B0%E7%BB%84&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Ydn1D4nWDvuWN9mvRvnWDv0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EnHT4rjR3n101njc4PHnLrHTYPs" target="_blank" class="baidu-highlight">字节数组</a> byte[] bytes = str.getBytes() StringBuilder sb = new StringBuilder(bytes.length * 2) // 将<a href="https://www.baidu.com/s?wd=%E5%AD%97%E8%8A%82%E6%95%B0%E7%BB%84&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Ydn1D4nWDvuWN9mvRvnWDv0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EnHT4rjR3n101njc4PHnLrHTYPs" target="_blank" class="baidu-highlight">字节数组</a>中每个字节拆解成2位16进制整数for (int i = 0i <bytes.lengthi++) {sb.append(hexString.charAt((bytes[i] &0xf0) >>4)) sb.append(hexString.charAt((bytes[i] &0x0f) >>0)) }return sb.toString()} /* * 将16进制数字解码成字符串,适用于所有字符（包括中文） */public static String decode(String bytes) {ByteArrayOutputStream baos = new ByteArrayOutputStream(bytes.length() / 2) // 将每2位16进制整数组装成一个字节for (int i = 0i <bytes.length()i += 2)baos.write((hexString.indexOf(bytes.charAt(i)) <<4 | hexString.indexOf(bytes.charAt(i + 1)))) return new String(baos.toByteArray())}java中 hex 转换成字符串方法：public class Test {private static String hexString = "0123456789ABCDEFabcdef"public static void main(String[] args) {String msg= "亲，你好"System.out.println(encode(msg))System.out.println(decode(encode(msg)))}public static String encode(String str) {byte[] bytes = str.getBytes()StringBuilder sb = new StringBuilder(bytes.length * 2)//转换hex编码for (byte b : bytes) {sb.append(Integer.toHexString(b + 0x800).substring(1))}str = sb.toString()return str}//把hex编码转换为stringpublic static String decode(String bytes) {bytes = bytes.toUpperCase()ByteArrayOutputStream baos = new ByteArrayOutputStream(bytes.length() / 2)// 将每2位16进制整数组装成一个字节for (int i = 0i <bytes.length()i += 2)baos.write((hexString.indexOf(bytes.charAt(i)) <<4 | hexString.indexOf(bytes.charAt(i + 1))))return new String(baos.toByteArray())}}
