Java加密工具类详解编程语言

依赖:org.apache.commons.codec.digest.DigestUtils

支持MD5,SHA-1,SHA-256

Apache下载地址:http://commons.apache.org/proper/commons-codec/download_codec.cgi

import java.security.MessageDigest; 
import java.security.NoSuchAlgorithmException; 
  
/** 
 * CiphertextUtil 
 * 
 * @author ysj 
 */ 
public class CiphertextUtil { 
    public static final String MD5 = "MD5"; 
    public static final String SHA_1 = "SHA-1"; 
    public static final String SHA_256 = "SHA-256"; 
    private static final char[] CH_HEX = {'0', '1', '2', '3', '4', '5', '6', '7', '8', 
        '9', 'A', 'B', 'C', 'D', 'E', 'F'}; 
  
    /** 
     * 加密字符串 
     * 
     * @param sourceStr    需要加密目标字符串 
     * @param algorithmsName 算法名称(如:MD5,SHA-1,SHA-256) 
     * @return 
     */ 
    public static String passAlgorithmsCiphering(String sourceStr,String algorithmsName){ 
        String password = ""; 
        MessageDigest md; 
        try { 
            md = MessageDigest.getInstance(algorithmsName); 
            // 使用指定byte[]更新摘要 
            md.update(sourceStr.getBytes()); 
            // 完成计算，返回结果数组 
            byte[] b = md.digest(); 
            password = byteArrayToHex(b); 
        } catch (NoSuchAlgorithmException e) { 
            e.printStackTrace(); 
        } 
        return password; 
    } 
  
    /** 
     * 将字节数组转为十六进制字符串 
     * 
     * @param bytes 
     * @return 返回16进制字符串 
     */ 
    private static String byteArrayToHex(byte[] bytes) { 
        // 一个字节占8位，一个十六进制字符占4位；十六进制字符数组的长度为字节数组长度的两倍 
        char[] chars = new char[bytes.length * 2]; 
        int index = 0; 
        for (byte b : bytes) { 
            // 取字节的高4位 
            chars[index++] = CH_HEX[b >>> 4 & 0xf]; 
            // 取字节的低4位 
            chars[index++] = CH_HEX[b & 0xf]; 
        } 
        return new String(chars); 
    } 
}

import org.apache.commons.codec.digest.DigestUtils; 
  
/** 
 * CiphertextUtil 
 * 
 * @author ysj 
 */ 
public class CiphertextUtil { 
    public static final String MD2 = "MD2"; 
    public static final String MD5 = "MD5"; 
    public static final String SHA_1 = "SHA1"; 
    public static final String SHA_256 = "SHA256"; 
    public static final String SHA_384 = "SHA384"; 
    public static final String SHA_512 = "SHA512"; 
  
    /** 
     * 加密字符串 
     * 
     * @param sourceStr    需要加密目标字符串 
     * @param algorithmsName 算法名称(如:MD2,MD5,SHA1,SHA256,SHA384,SHA512) 
     * @return 
     */ 
    public static String passAlgorithmsCiphering(String sourceStr,String algorithmsName){ 
        String password = ""; 
        switch(algorithmsName){ 
        case "MD2": 
            password = DigestUtils.md2Hex(sourceStr); 
            break; 
        case "MD5": 
            password = DigestUtils.md5Hex(sourceStr); 
            break; 
        case "SHA1": 
            password = DigestUtils.sha1Hex(sourceStr); 
            break; 
        case "SHA256": 
            password = DigestUtils.sha256Hex(sourceStr); 
            break; 
        case "SHA384": 
            password = DigestUtils.sha384Hex(sourceStr); 
            break; 
        case "SHA512": 
            password = DigestUtils.sha512Hex(sourceStr); 
            break; 
        } 
        return password; 
    } 
}