import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;@SuppressWarnings("restriction")public class Base64 {    /**     * str 编码为base64     *      * @param String s     * @return String base64     * */    public static String getBase64(String s) {        if (s == null)            return null;        return (new sun.misc.BASE64Encoder()).encode(s.getBytes());    }    /**     * byte[] 编码为base64     *      * @param byte[] ba     * @return String base64     * */    public static String getBase64(byte[] ba) {        if (ba == null)            return null;        return (new sun.misc.BASE64Encoder()).encode(ba);    }    /**     * base64 解码为 byte[]     *      * @param String base64     * @return byte[]     * @throws IOException     * */    public static byte[] base64ToByteArray(String base64) throws IOException {        if (base64 == null)            return null;        return (new sun.misc.BASE64Decoder()).decodeBuffer(base64);    }        /**     * 将base64 字符串反序列化为指定的类     *      * @param base64 序列化后用Base64编码的字符串     * @param serializedClass 序列化对象的class     *      * @return typed object, can be null.     * */    @SuppressWarnings("unchecked")    public static 
     
       T deFromBase64(String base64, Class
      
        serializedClass) {        Object o = null;        byte[] ba = null;        ByteArrayInputStream bai = null;        ObjectInputStream oi = null;        try {            ba = Base64.base64ToByteArray(base64);            bai = new ByteArrayInputStream(ba);            oi = new ObjectInputStream(bai);            o = oi.readObject();        } catch (IOException e) {            System.out.println("反序列化失败！");            e.printStackTrace();        } catch (ClassNotFoundException e) {            System.out.println("类未找到！");            e.printStackTrace();        } finally {            try {                if (oi != null) {                    oi.close();                }                if (bai != null) {                    bai.close();                }            } catch (IOException e) {                System.out.println("关闭流异常！");                e.printStackTrace();            }        }        return o == null ? null : (T) o;    }    /**     * 将对象序列化为Base64 字符串     *      * @param obj 实现了可序列化接口的对象     * @return String 对象序列化为字符串后编码为Base64     * */    public static String se2base64(Serializable obj) {        byte[] ba = null;        ByteArrayOutputStream baos = null;        ObjectOutputStream oos = null;        try {            baos = new ByteArrayOutputStream();            oos = new ObjectOutputStream(baos);            oos.writeObject(obj);            ba = baos.toByteArray();        } catch (IOException e) {            System.out.println("序列化失败！");        } finally {            try {                if (baos != null) {                    baos.close();                }                if (oos != null) {                    oos.close();                }            } catch (IOException e) {                e.printStackTrace();            }        }        return ba == null ? null : Base64.getBase64(ba);    }}