Java基础—IO小结（二）缓冲流与其它流的使用

一、缓冲流的使用

@Test
public void test2() {
ObjectInputStream ois = null;
try {
FileInputStream fis = new FileInputStream(new File("person.txt"));
ois = new ObjectInputStream(fis);
// 反序列化到内存中了
Person p1 = (Person) ois.readObject();
System.out.println("p1 = " + p1);
Person p2 = (Person) ois.readObject();
System.out.println("p2 = " + p2);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (ois != null) {
try {
ois.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

}

package cn.itcast_03_netty.sendobject.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

public class ByteObjConverter {
/**
* 使用IO的inputstream流将byte[]转换为object
* @param bytes
* @return
*/
public static Object byteToObject(byte[] bytes) {
Object obj = null;
ByteArrayInputStream bi = new ByteArrayInputStream(bytes);
ObjectInputStream oi = null;
try {
oi = new ObjectInputStream(bi);
obj = oi.readObject();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
bi.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
oi.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return obj;
}
/**
* 使用IO的outputstream流将object转换为byte[]
* @param bytes
* @return
*/
public static byte[] objectToByte(Object obj) {
byte[] bytes = null;
ByteArrayOutputStream bo = new ByteArrayOutputStream();
ObjectOutputStream oo = null;
try {
oo = new ObjectOutputStream(bo);
oo.writeObject(obj);
bytes = bo.toByteArray();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
bo.close();
} catch (IOException e) {
e.printStackTrace();
}
try {
oo.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return bytes;
}
}