java深克隆List、Map的工具类

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已于 2023-10-24 10:27:54 修改

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分类专栏： java-util 文章标签： 1024程序员节 java深克隆 java集合克隆 java克隆

于 2023-10-24 10:24:28 首次发布

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import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class CloneUtil {
	
	private static final Logger logger = LoggerFactory.getLogger(CloneUtil.class);

	public static <T> Map<String, T> cloneMap(Map<String, T> original) {
		
        try {
        	
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ObjectOutputStream oos = new ObjectOutputStream(baos);
            oos.writeObject(original);
            ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
            ObjectInputStream ois = new ObjectInputStream(bais);
            Map<String, T> m = (Map<String, T>)ois.readObject();
            
            ois.close();
            bais.close();
            oos.close();
            baos.close();
            
            return m;
        }
        catch (Exception e) {
        	logger.error("", e);
            return null;
        }
    }
	
	public static <T> List<T> cloneList(List<T> original) {
		
        try {
        	
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ObjectOutputStream oos = new ObjectOutputStream(baos);
            oos.writeObject(original);
            ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
            ObjectInputStream ois = new ObjectInputStream(bais);
            List<T> l = (List<T>)ois.readObject();
            
            ois.close();
            bais.close();
            oos.close();
            baos.close();
            
            return l;
        }
        catch (Exception e) {
        	logger.error("", e);
            return null;
        }
    }
}