id hash分桶

1、tensorflow
tf.string_to_hash_bucket()

https://blog.csdn.net/pearl8899/article/details/107958334

2、python

import hashlib

id='test'
bucket_size=4096

id_hash = id.encode('utf-8')
id_hash = int(hashlib.md5(id_hash).hexdigest(), 16) % bucket_size

https://blog.csdn.net/qq_14997473/article/details/81085186

3、java

package chease_base;

import java.io.UnsupportedEncodingException;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class TestMain {
	
	public static String getMD5Str(String str) {
        byte[] digest = null;
        try {
        	 MessageDigest md5 = MessageDigest.getInstance("md5");
             digest  = md5.digest(str.getBytes("utf-8"));
           
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        
        // 转换为10进制整数
        System.out.println(new BigInteger(1, digest));
       
        // 转换为10进制整数字符串
        String md5Str = new BigInteger(1, digest).toString(10);
        System.out.println("md5Str=" + md5Str);
       
        // 转换为16进制整数字符串
//        String md5Str2 = new BigInteger(1, digest).toString(16);
//        System.out.println(md5Str2);
        
        // 取mod
        BigInteger num = new BigInteger(1, digest);
        BigInteger bucket = new BigInteger("7");
        
        System.out.println(String.valueOf(num.mod(bucket)));
        		
        return md5Str;
    }
	public static void main(String[] args) throws NoSuchAlgorithmException, UnsupportedEncodingException {
	
		System.out.println(getMD5Str("awbc"));
	}

}