Java 序列化对象工具类

 

SerializationUtils.java

package javax.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.HashMap;
import java.util.Map;

/**
 * 序列化工具类
 * 
 * @author Logan
 * @version 1.0.0
 *
 */
public class SerializationUtils {

    /**
     * 序列化对象
     * 
     * @param obj 对象
     * @return 序列化后的字节数组
     * @throws IOException
     */
    public static byte[] serialize(Object obj) throws IOException {
        if (null == obj) {
            return null;
        }

        try (
                ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
                ObjectOutputStream out = new ObjectOutputStream(byteArrayOutputStream);
        ) {

            out.writeObject(obj);
            return byteArrayOutputStream.toByteArray();
        }

    }

    /**
     * 反序列化
     * 
     * @param bytes 对象序列化后的字节数组
     * @return 反序列化后的对象
     * @throws IOException
     * @throws ClassNotFoundException
     */
    public static Object deserialize(byte[] bytes) throws IOException, ClassNotFoundException {
        if (null == bytes) {
            return null;
        }

        try (
                ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
                ObjectInputStream in = new ObjectInputStream(byteArrayInputStream);
        ) {

            return in.readObject();
        }
    }

    /**
     * 反序列化成指定类型的对象
     * 
     * @param bytes 对象序列化后的字节数组
     * @param c 反序列化后的对象类型
     * @return 指定类型的对象
     * @throws IOException
     * @throws ClassNotFoundException
     */
    public static <T> T deserialize(byte[] bytes, Class<T> c) throws ClassNotFoundException, IOException {
        return c.cast(deserialize(bytes));
    }

    public static void main(String[] args) {
        try {
            Map<String, Object> map = new HashMap<>();
            map.put("name", "Logan");
            map.put("age", 26);

            byte[] bytes = serialize(map);
            Map<?, ?> map2 = deserialize(bytes, Map.class);
            System.out.println(map2);

            System.out.println(map.equals(map2));
            System.out.println(map == map2);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

 

 

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