AES：

package com.example.wuji.jiami;
import com.sun.org.apache.xml.internal.security.utils.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
/**
 * 对称加密 AES
 */
public class Aes {
    public static void main(String[] args) throws Exception {
        String jin = "jinxudong";
        //DES加密 只允许密钥是16个字节的
        String key = "1234567890asdfgh";
        String sf = "AES";
        String str = jiami(key, sf, jin);
        System.out.println("AES加密后：" + str);
        str = jiemi(key, sf, str);
        System.out.println("AES解密后：" + str);
    }
    /**
     * 加密
     *
     * @param key     密钥
     * @param jiami   加密算法
     * @param content 加密内容
     * @return
     * @throws Exception
     */
    private static String jiami(String key, String jiami, String content) throws Exception {
        Cipher cipher = Cipher.getInstance(jiami);
        //加密规则
        SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), jiami);
        //加密模式 加密规则
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        //执行加密方法
        byte[] l = cipher.doFinal(content.getBytes());
        String str = Base64.encode(l);
        return str;
    }
    /**
     * 解密
     *
     * @param key     密钥
     * @param jiami   算法
     * @param content 解密内容
     * @return
     * @throws Exception
     */
    private static String jiemi(String key, String jiami, String content) throws Exception {
        Cipher cipher = Cipher.getInstance(jiami);
        //加密规则
        SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), jiami);
        //加密模式 加密规则 解密 DECRYPT
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        //执行解密方法
        byte[] str = Base64.decode(content.getBytes());
        byte[] ss = cipher.doFinal(str);
        return new String(ss);
    }
}

DES:

package com.example.wuji.jiami;
import com.sun.org.apache.xml.internal.security.utils.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
/**
 * 对称加密 DES
 */
public class Des {
    public static void main(String[] args) throws Exception {
        String jin = "jinxudong";
        //DES加密 只允许密钥是8个字节的
        String key = "12345678";
        String sf = "DES";
        String str = jiami(key, sf, jin);
        System.out.println("DES加密后：" + str);
        str = jiemi(key, sf, str);
        System.out.println("DES解密后：" + str);
    }
    /**
     * 加密
     *
     * @param key     密钥
     * @param jiami   加密算法
     * @param content 加密内容
     * @return
     * @throws Exception
     */
    private static String jiami(String key, String jiami, String content) throws Exception {
        Cipher cipher = Cipher.getInstance(jiami);
        //加密规则
        SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), jiami);
        //加密模式 加密规则
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        //执行加密方法
        byte[] l = cipher.doFinal(content.getBytes());
        String str = Base64.encode(l);
        return str;
    }
    /**
     * 解密
     *
     * @param key     密钥
     * @param jiami   算法
     * @param content 解密内容
     * @return
     * @throws Exception
     */
    private static String jiemi(String key, String jiami, String content) throws Exception {
        Cipher cipher = Cipher.getInstance(jiami);
        //加密规则
        SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(), jiami);
        //加密模式 加密规则 解密 DECRYPT
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        //执行解密方法
        byte[] str = Base64.decode(content.getBytes());
        byte[] ss = cipher.doFinal(str);
        return new String(ss);
    }
}