在工作中，会用到很多加密格式。
工具类如下
代码语言：javascript复制import java.security.MessageDigest;
/**
* @author Piconjo
* @date 2020/6/1 18:45
*/
public class EncryptionDecryptionUtil {
private enum DigestType{
MD5("MD5")
,SHA("SHA")
,SHA256("SHA-256")
,SHA512("SHA-512");
private String digestDesc;
private DigestType(String digestDesc){
this.digestDesc = digestDesc;
}
public String getDigestDesc() {
return digestDesc;
}
}
private final static String digest(String sourceStr,DigestType type) {
char hexDigits[]={'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
try {
byte[] btInput = sourceStr.getBytes();
// 获得MD5摘要算法的MessageDigest对象
MessageDigest mdInst = MessageDigest.getInstance(type.digestDesc);
// 使用指定的字节更新摘要
mdInst.update(btInput);
// 获得密文
byte[] md = mdInst.digest();
// 将密文转换成十六进制的字符串形式
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i ) {
byte byte0 = md[i];
str[k ] = hexDigits[byte0 >>> 4 & 0xf];
str[k ] = hexDigits[byte0 & 0xf];
}
return new String(str);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public final static String MD5(String s) {
return digest(s, DigestType.MD5);
}
public final static String SHA(String s) {
return digest(s, DigestType.SHA);
}
public final static String SHA256(String s){
return digest(s, DigestType.SHA256);
}
public final static String SHA512(String s){
return digest(s, DigestType.SHA512);
}
// 单测
public static void main(String[] args) {
String sourceStr1 = "piconjo";
String sourceStr2 = "zjitc";
System.out.println(EncryptionDecryptionUtil.MD5(sourceStr1));
System.out.println(EncryptionDecryptionUtil.MD5(sourceStr2));
System.out.println(EncryptionDecryptionUtil.SHA(sourceStr1));
System.out.println(EncryptionDecryptionUtil.SHA(sourceStr2));
System.out.println(EncryptionDecryptionUtil.SHA256(sourceStr1));
System.out.println(EncryptionDecryptionUtil.SHA256(sourceStr2));
System.out.println(EncryptionDecryptionUtil.SHA512(sourceStr1));
System.out.println(EncryptionDecryptionUtil.SHA512(sourceStr2));
}
}
