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  • 字符串生成64位hash字符串

    使用sha-256生成32位byte数组,基本很难重复,再转化为64位16进制数字字符串。

    import java.io.UnsupportedEncodingException;
    import java.security.MessageDigest;
    import java.security.NoSuchAlgorithmException;
    
    public class SHA256Util {
    	public static void main(String[] args) {
    		System.out.println(getSHA256StrJava("130"));
    		System.out.println(getSHA256StrJava("13034234324weweasxwsqszASxsadreqq	scdzsd"));
    		System.out.println(getSHA256StrJava("13034234324weweasxwsqszASxsadreq{ww=bb,see=2ss}"));
    
    	}
    
    	public static String getSHA256StrJava(String str) {
    
    		MessageDigest messageDigest;
    		String encodeStr = "";
    		try {
    			messageDigest = MessageDigest.getInstance("SHA-256");
    			messageDigest.update(str.getBytes("UTF-8"));
    			encodeStr = byte2Hex(messageDigest.digest());
    		} catch (NoSuchAlgorithmException e) {
    			e.printStackTrace();
    		} catch (UnsupportedEncodingException e) {
    			e.printStackTrace();
    		}
    		return encodeStr;
    	}
    
    	private static String byte2Hex(byte[] bytes) {
    		System.out.println(bytes.length);
    		StringBuffer stringBuffer = new StringBuffer();
    		String temp = null;
    		for (int i = 0; i < bytes.length; i++) {
    			temp = Integer.toHexString(bytes[i] & 0xFF);
    			if (temp.length() == 1) {
    				// 1得到一位的进行补0操作
    				stringBuffer.append("0");
    			}
    			stringBuffer.append(temp);
    		}
    		return stringBuffer.toString();
    	}
    
    }
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  • 原文地址:https://www.cnblogs.com/yaoyu1983/p/12267809.html
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