AES加密，解决了同步问题，和随机密钥和固定密钥，多端通信加密不一致解决办法

1、密钥随机生成。
/@author wjh/
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;

/**
* @ClassName: AESUtil
* @Description: 对cookie进行加密解密
* @author
* @date 2015-9-23 上午9:07:18
*
*/
public class AesUtils {

public static final String logalrithm = "AES/CBC/PKCS5Padding";

private static byte[] keyValue = new byte[] {        
    22,25,-35,-45,25,98,-55,-45,10,20,-45,25,
    26,-95,25,-65,-11,-99,85,45,-62,10,-0,11,
    -35,48,-98,65,-32,14,-78,25,36,-56,-45,-45,
    12,15,-35,-75,15,-14,62,-25,33,-45,55,68,-88
};
private static byte[] iv = new byte[] {                
    -12,35,-25,65,45,-87,95,-22,-15,45,55,-66,32,5-4,84,55
};
private static SecretKey key;                        
private static AlgorithmParameterSpec paramSpec;                         

static{        
    KeyGenerator kgen;
    try {
        kgen = KeyGenerator.getInstance("AES");
        kgen.init(128, new SecureRandom(keyValue));
        key = kgen.generateKey();
        paramSpec = new IvParameterSpec(iv);
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
}


/** 
* @Title: encrypt 
* @Description: 加密，使用指定数据源生成密钥，使用用户数据作为算法参数进行AES加密
* @return String    返回类型 
* @param msg 加密的数据
* @return
* @date 2015-9-23 上午9:09:20 
* @throws 
*/
public static String encrypt(String msg) {
    String str = "";
    try {    
        Cipher ecipher = Cipher.getInstance(logalrithm);
        ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
        str = asHex(ecipher.doFinal(msg.getBytes()));
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    }
    return str;
}


/** 
* @Title: decrypt 
* @Description: 解密，对生成的16进制的字符串进行解密
* @return String    返回类型 
* @author WUWeidong   
* @param value
* @return
* @date 2015-9-23 上午9:10:01 
* @throws 
*/
public static String decrypt(String value) {
    try {
        Cipher ecipher = Cipher.getInstance(logalrithm);
        ecipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
        return new String(ecipher.doFinal(asBin(value)));
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    }
    return "";
}


/** 
* @Title: asHex 
* @Description: 将字节数组转换成16进制字符串
* @return String    返回类型 
* @param buf
* @return
* @date 2015-9-23 上午9:10:25 
* @throws 
*/
private static String asHex(byte[] buf) {
    StringBuffer strbuf = new StringBuffer(buf.length * 2);
    int i;
    for (i = 0; i < buf.length; i++) {
        if (((int) buf[i] & 0xff) < 0x10){
            strbuf.append("0");
        }
        strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
    }
    return strbuf.toString();
}


/** 
* @Title: asBin 
* @Description: 将16进制字符串转换成字节数组
* @return byte[]    返回类型 
* @author WUWeidong   
* @param src
* @return
* @date 2015-9-23 上午9:10:52 
* @throws 
*/
private static byte[] asBin(String src) {
    if (src.length() < 1){
        return null;
    }
    byte[] encrypted = new byte[src.length() / 2];
    for (int i = 0; i < src.length() / 2; i++) {
        int high = Integer.parseInt(src.substring(i * 2, i * 2 + 1), 16);
        int low = Integer.parseInt(src.substring(i * 2 + 1, i * 2 + 2), 16);
        encrypted[i] = (byte) (high * 16 + low);
    }
    return encrypted;
}

public static void main(String[] args) {
    String msg="897807300";
    System.out.println(encrypt(msg));
    System.out.println(decrypt(encrypt(msg)));
}

}
2、密钥固定，加密通信的时候可以使用

package com.cmcc.omp.securityplatform.base;
import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/**
* @ClassName: AESUtil
* @Description: 对cookie进行加密解密
* @date 2015-9-23 上午9:07:18
*
*/
public class AesUtils {

public static final String logalrithm = "AES/CBC/PKCS5Padding";
public static final String bm = "utf-8";  
private static byte[] keyValue = new byte[] {        
    22,-35,-45,25,98,-55,-45,10,35,-45,25,26,-95,25,-35,48
};
private static byte[] iv = new byte[] {                
    -12,35,-25,65,45,-87,95,-22,-15,45,55,-66,32,5-4,84,55
};

private static Key keySpec;
private static IvParameterSpec ivSpec;                     

static{        
    keySpec = new SecretKeySpec(keyValue, "AES");
    ivSpec = new IvParameterSpec(iv);     
}    

/** 
* @Title: encrypt 
* @Description: 加密，使用指定数据源生成密钥，使用用户数据作为算法参数进行AES加密
* @return String    返回类型 
* @param msg 加密的数据
* @return
* @date 2015-9-23 上午9:09:20 
* @throws 
*/
public static String encrypt(String msg) {
    byte[] encryptedData = null;
    try {
        Cipher ecipher = Cipher.getInstance(logalrithm);
        ecipher.init(Cipher.ENCRYPT_MODE, keySpec, ivSpec);
        encryptedData = ecipher.doFinal(msg.getBytes(bm));  
    } catch (IllegalBlockSizeException | BadPaddingException e) {
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    return asHex(encryptedData);
}


/** 
* @Title: decrypt 
* @Description: 解密，对生成的16进制的字符串进行解密
* @return String    返回类型    
* @param value
* @return
* @date 2015-9-23 上午9:10:01 
* @throws 
*/
public static String decrypt(String value) {
    try {
        Cipher ecipher = Cipher.getInstance(logalrithm);
        ecipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
        return new String(ecipher.doFinal(asBin(value)));
    } catch (BadPaddingException e) {
        System.out.println("解密错误："+value);
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        System.out.println("解密错误："+value);
        e.printStackTrace();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    } catch (InvalidAlgorithmParameterException e) {
        e.printStackTrace();
    }
    return "";
}


/** 
* @Title: asHex 
* @Description: 将字节数组转换成16进制字符串
* @return String    返回类型  
* @param buf
* @return
* @date 2015-9-23 上午9:10:25 
* @throws 
*/
private static String asHex(byte[] buf) {
    StringBuffer strbuf = new StringBuffer(buf.length * 2);
    int i;
    for (i = 0; i < buf.length; i++) {
        if (((int) buf[i] & 0xff) < 0x10){
            strbuf.append("0");
        }
        strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
    }
    return strbuf.toString();
}


/** 
* @Title: asBin 
* @Description: 将16进制字符串转换成字节数组
* @return byte[]    返回类型 
* @param src
* @return
* @date 2015-9-23 上午9:10:52 
* @throws 
*/
private static byte[] asBin(String src) {
    if (src.length() < 1){
        return null;
    }
    byte[] encrypted = new byte[src.length() / 2];
    for (int i = 0; i < src.length() / 2; i++) {
        int high = Integer.parseInt(src.substring(i * 2, i * 2 + 1), 16);
        int low = Integer.parseInt(src.substring(i * 2 + 1, i * 2 + 2), 16);
        encrypted[i] = (byte) (high * 16 + low);
    }
    return encrypted;
}

public static void main(String[] args) {
    String userid = "[email protected]";
    String token = "8aa8690f65f080aee595d8781e7044a7eacda7a86520786db0838136554920b6";
    System.out.println(encrypt(userid));
    System.out.println(decrypt(encrypt(userid)));
}

}