安卓开发常用工具类.doc

SHAUtil SHA加密 package com.itheima.androidutils.utils.encrypt.aes; import java.io.UnsupportedEncodingException; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; package com.itheima.androidutils.utils; import java.security.MessageDigest; /** * 提供SHA加密 */ public class SHAUtil { // 进行SHA-1加密 进行SHA-1加密 public static String SHAEncode(String message) { String resultString = null; try { MessageDigest md = MessageDigest.getInstance(SHA); md.update(message.getBytes()); resultString = bytes2HexString(md.digest()); } catch (Exception e) { e.printStackTrace(); } return resultString; } // 将Bytes数据转换成16进制字符串格式 将Bytes数据转换成16进制字符串格式 public static String bytes2HexString(byte[] bts) { String des = ; String tmp = null; for (int i = 0; i bts.length; i++) { tmp = (Integer.toHexString(bts[i] 0xFF)); if (tmp.length() == 1) { des += 0; } des += tmp; } return des; } } AES对称加密解密类 public class Aes { // /** 算法/模式/填充 **/ private static final String CipherMode = AES/ECB/PKCS5Padding; ///** 创建密钥 **/ private static SecretKeySpec createKey(String password) { byte[] data = null; if (password == null) { password = ; } StringBuffer sb = new StringBuffer(32); sb.append(password); while (sb.length() 32) { sb.append(0); } if (sb.length() 32) { sb.setLength(32); } try { data = sb.toString().getBytes(UTF-8); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return new SecretKeySpec(data, AES); } 加密字节数据 byte[] encrypt(byte[] content, String password) public static byte[] encrypt(byte[] content, String password) { try { SecretKeySpec key = createKey(password); System.out.println(key); Cipher cipher = Cipher.getInstance(CipherMode); cipher.init(Cipher.ENCRYPT_MODE, key); byte[] result = cipher.doFinal(content); return result; } catch (Exception e) { e.printStackTrace(); } return null; } 加密(结果为16进制字符串) String encrypt