Java transient关键字，

Java transient关键字，

import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

/**
 * transient 关键字范例
 * 该关键字标识的字段将不被序列化处理
 * @author efanhome
 *
 */
public class TransientTest implements Serializable{
	private static final long serialVersionUID = -1126012957732929372L;
	private String username;
	private transient String password;
	
	public TransientTest(String username, String password) {
		this.username = username;
		this.password = password;
	}
	
	@Override
	public String toString() {
		return "TransientTest [username=" + username + ", password=" + password
				+ "]";
	}

	public static void main(String[] args) throws Exception {
		//实例化
		TransientTest tt = new TransientTest("efanhome", "admin");
		System.out.println("before serialized: "+tt);
		String path = ClassLoader.getSystemResource("").getPath();
		path = path.substring(1) + "transientObj.out";
		//序列化存储
		ObjectOutputStream oos = new ObjectOutputStream(
				new FileOutputStream(path));
		oos.writeObject(tt);
		oos.flush();
		oos.close();
		//反序列化
		ObjectInputStream ois = new ObjectInputStream(
				ClassLoader.getSystemResourceAsStream("transientObj.out"));
		TransientTest t1 = (TransientTest) ois.readObject();
		System.out.println("after serialized: " + t1);
		ois.close();
	}
}

 

执行结果：

before serialized: TransientTest [username=efanhome, password=admin]
after serialized: TransientTest [username=efanhome, password=null]