beans64 与 String 之间的自由转换

需要依赖jar: commons-codec.jar
beans64 工具类

package com.znsd.beans64; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import org.apache.commons.codec.binary.Base64; /** * beans64 工具类 */ public class Base64Util { /** * 将文件转换 beans64 * @param imgFile 待处理的数据 * @return beans64数据 */ public static String filetoBese64(String dir) { InputStream in = null; byte[] bytes = null; try { in = new FileInputStream(dir); bytes = new byte[in.available()]; in.read(bytes); in.close(); } catch (IOException e) { e.printStackTrace(); } return new String(Base64.encodeBase64(bytes)); } /** * 将 beans64 数据转为 磁盘数据 * @param beans64String * @param dir * @throws IOException */ public static void bese64ToFile(String beans64String, String dir) throws IOException { if (beans64String == null) return ; byte[] bytes = Base64.decodeBase64(beans64String); for (int i = 0; i < bytes.length; ++i) { if (bytes[i] < 0) bytes[i] += 256; } OutputStream out = new FileOutputStream(dir); out.write(bytes); out.flush(); out.close(); } /** * 将String 数据转换为 beans64 * @param beans64String 需要转换的 beans64 * @return 处理好的 String */ public static String stringTobeans64(String beans64String) { return new String(Base64.encodeBase64(beans64String.getBytes())); } /** * 将beans64 数据转换为 String * @param beans64String 需要转换的 beans64 * @return 处理好的 String */ public static String beans64ToString(String beans64String) { String temp = ""; if (beans64String == null) return temp; byte[] bytes = Base64.decodeBase64(beans64String); for (int i = 0; i < bytes.length; ++i) { if (bytes[i] < 0) bytes[i] += 256; } return new String(bytes); } }

/** * demo 案例 * @param args */ public static void main(String[] args) { System.out.println(beans64ToString(stringTobeans64("StringData"))); String fileBese64 = filetoBese64("c:/filePath"); bese64ToFile(fileBese64, "toDir"); }

beans64 与 md5 整合: 个人觉得没必要了做加密 DM5 就够了

package com.znsd.beans64; import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import org.apache.commons.codec.binary.Base64; /** * 消息摘要工具 */ public class MessageDigestUtil { /** * 先进行MD5摘要再进行Base64编码获取摘要字符串 * * @param str * @return */ public static String base64AndMD5(String str) { if (str == null) { throw new IllegalArgumentException("inStr can not be null"); } return base64AndMD5(toBytes(str)); } /** * 先进行MD5摘要再进行Base64编码获取摘要字符串 * * @return */ public static String base64AndMD5(byte[] bytes) { if (bytes == null) { throw new IllegalArgumentException("bytes can not be null"); } try { final MessageDigest md = MessageDigest.getInstance("MD5"); md.reset(); md.update(bytes); final Base64 base64 = new Base64(); final byte[] enbytes = base64.encode(md.digest()); return new String(enbytes); } catch (final NoSuchAlgorithmException e) { throw new IllegalArgumentException("unknown algorithm MD5"); } } /** * UTF-8编码转换为ISO-9959-1 * * @param str * @return */ public static String utf8ToIso88591(String str) { if (str == null) { return str; } try { return new String(str.getBytes("UTF-8"), "ISO-8859-1"); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e.getMessage(), e); } } /** * ISO-9959-1编码转换为UTF-8 * * @param str * @return */ public static String iso88591ToUtf8(String str) { if (str == null) { return str; } try { return new String(str.getBytes("ISO-8859-1"), "UTF-8"); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e.getMessage(), e); } } /** * String转换为字节数组 * * @param str * @return */ private static byte[] toBytes(final String str) { if (str == null) { return null; } return str.getBytes(); } }

MD5加密 与 SHA1加密

import org.apache.commons.codec.digest.DigestUtils; /** * MD5 案例 * @param args */ public static void main(String[] args) { // 1. MD5加密 DigestUtils.md5Hex(data) System.out.println(DigestUtils.md5Hex("StringData")); // 2. SHA1加密 DigestUtils.sha1Hex(data) System.out.println(DigestUtils.sha1Hex("StringData")); }