java修改显示原值

原值"/>

java修改显示原值

在copy 对像时，发现改变copy对象的属性值时，都会改变原值，方法如下：

List a ；//a为方法参数中传进来的list；

方法1：

List b = new ArrayList(a);

方法2：

List b = new ArrayList(Arrays.asList(new A[a.size()]));

Collections.copy(b, a);

以上方法copy完毕后，经测试都会改变原list的对象属性值，放弃；

使用以下方法解决了此问题

/**

* list中的对象必须实现序列化接口 执行序列化和反序列化  进行深度拷贝

* @param srcList

* @return

* @throws IOException

* @throws ClassNotFoundException

*/

@SuppressWarnings("unchecked")

private List deepCopy(List srcList) throws IOException, ClassNotFoundException {

ByteArrayOutputStream byteOut = new ByteArrayOutputStream();

ObjectOutputStream out = new ObjectOutputStream(byteOut);

out.writeObject(srcList);

ByteArrayInputStream byteIn = new ByteArrayInputStream(byteOut.toByteArray());

ObjectInputStream in = new ObjectInputStream(byteIn);

List destList = (List) in.readObject();

return destList;

}

根据的2015年11月发现的序列化漏洞修改为：

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import org.apachemons.beanutils.BeanUtils;

import org.apachemons.configuration.ConfigurationException;

import org.apache.struts2.ServletActionContext;

import org.nibblesec.tools.SerialKiller;

/**

* list中的对象必须实现序列化接口 执行序列化和反序列化  进行深度拷贝

* @param srcList

* @return

* @throws IOException

* @throws ClassNotFoundException

* @throws ConfigurationException

*/

@SuppressWarnings("unchecked")

private List deepCopy(List srcList) {

List destList = null;

ByteArrayOutputStream byteOut = null;

ObjectOutputStream out = null;

ByteArrayInputStream byteIn  = null;

ObjectInputStream ois = null;

try {

byteOut = new ByteArrayOutputStream();

out = new ObjectOutputStream(byteOut);

out.writeObject(srcList);

byteIn = new ByteArrayInputStream(byteOut.toByteArray());

ois = new SerialKiller(byteIn, "config/serialkiller.conf");

//原方法放弃

// ObjectInputStream in = new ObjectInputStream(byteIn);

// destList = (List) in.readObject();

destList = (List) ois.readObject();

} catch (IOException e) {

LOGGER.error("对象中包含没有继承序列化的对象: " + e.getMessage());

} catch (ConfigurationException e) {

LOGGER.error("对象中包含没有继承序列化的对象: " + e.getMessage());

} catch (ClassNotFoundException e) {

LOGGER.error("对象中包含没有继承序列化的对象: " + e.getMessage());

}

finally{

try {

if(ois != null){ois.close();ois =null;}

if(byteIn != null){byteIn.close();byteIn = null;}

if(out !=null ){out.close();out = null;}

if(byteOut != null ){byteOut.close(); byteOut = null;}

} catch (IOException e) {

LOGGER.error("对象关闭失败: " + e.getMessage());

}

}

return destList;

}