Java对象序列化工具类

java序列化对象，与xml格式字符串互转，与Blob互转.

依赖包commons-lang-2.3.jar、hibernate-3.1.3.fix.jar、xstream-1.2.2.jar

代码实现

package edu.mahh;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.sql.Blob;
import java.sql.SQLException;

import org.apache.commons.lang.SerializationUtils;
import org.hibernate.Hibernate;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

public class SerializUtil implements Serializable {
    /**
     * 
     */
    private static final long serialVersionUID = 3068282609202318740L;

    public static byte[] objToBytes(Serializable obj) {
        return SerializationUtils.serialize(obj);
    }

    public static Serializable bytesToObj(byte[] bytes) {
        return ((Serializable) SerializationUtils.deserialize(bytes));
    }

    public static String objToString(Serializable obj) {
        if (obj == null)
            return null;
        String ret = null;
        BASE64Encoder encoder = new BASE64Encoder();

        String xml = objToXML(obj);

        ret = encoder.encode(objToBytes(xml));
        return ret;
    }

    public static Serializable stringToObj(String str) throws IOException {
        if (str == null)
            return null;
        BASE64Decoder decoder = new BASE64Decoder();
        String xml = (String) bytesToObj(decoder.decodeBuffer(str));
        return ((Serializable) xmlToObj(xml));
    }

    public static Blob objToBlob(Serializable obj) {
        if (obj == null)
            return null;

        System.out.println("save xml with base64");
        return Hibernate.createBlob(objToBytes(objToString(obj)));
    }

    public static Serializable blobToObj(Blob blob) {
        if (blob == null)
            return null;

        try {
            InputStream is = blob.getBinaryStream();
            ObjectInputStream objStream = new ObjectInputStream(is);
            Object obj = objStream.readObject();
            if (String.class.equals(obj.getClass())) {
                Serializable ret = stringToObj((String) obj);

                return ret;
            }

            return ((Serializable) obj);
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static void saveToFile(Serializable obj, String fileName) throws IOException {
        InputStream is = new ByteArrayInputStream(objToBytes(obj));
        FileOutputStream fos = new FileOutputStream(fileName);
        byte[] buf = new byte[10240];
        int len = -1;
        while ((len = is.read(buf)) != -1) {
            fos.write(buf, 0, len);
        }
        fos.close();
    }

    public static Serializable readFromFile(String fileName) throws SQLException, IOException,
        ClassNotFoundException {
        FileInputStream fis = new FileInputStream(fileName);
        ObjectInputStream is = new ObjectInputStream(fis);

        return ((Serializable) is.readObject());
    }

    public static void saveToFileAsXml(Object obj, String fileName) throws IOException {
        String xml = objToXML(obj);
        FileWriter fileWriter = new FileWriter(fileName);
        fileWriter.write(xml);
        fileWriter.close();
    }

    public static Object readFromXmlFile(String fileName) throws IOException, ClassNotFoundException {
        StringBuffer sBuffer = new StringBuffer();
        FileReader fReader = new FileReader(fileName);
        BufferedReader br = new BufferedReader(fReader);
        String data = null;
        while ((data = br.readLine()) != null) {
            sBuffer.append(data);
        }

        return xmlToObj(sBuffer.toString());
    }

    public static String objToXML(Object obj) {
        XStream xStream = new XStream(new DomDriver());
        return xStream.toXML(obj);
    }

    public static Object xmlToObj(String xml) {
        XStream xStream = new XStream(new DomDriver());
        return xStream.fromXML(xml);
    }
}

Eclipse工程下载地址，http://download.youkuaiyun.com/detail/asiaasia666/9228047