将byte数组转为Object详解编程语言

如果使用下面方法，将会报java.io.StreamCorruptedException: invalid stream header: 31323334异常

public static Object toObject(byte[] bytes) {
    
	Object obj = null; 
	try {
    
		ByteArrayInputStream bis = new ByteArrayInputStream(bytes); 
		ObjectInputStream ois = new ObjectInputStream(bis); 
		obj = ois.readObject(); 
		ois.close(); 
		bis.close(); 
	} catch (IOException ex) {
    
		ex.printStackTrace(); 
	} catch (ClassNotFoundException ex) {
    
		ex.printStackTrace(); 
	} 
	return obj; 
} 
 
public static void main(String[] args) {
    
	String str = "123456"; 
	byte b[] = str.getBytes(); 
	Object obj = toObject(b); 
} 

ObjectInputStream 是进行反序列化，因为反序列化byte数组之前没有对byte数组进行序列化，

如果使用readObject()读取，则必须使用writeObject()
如果使用readUTF()读取，则必须使用writeUTF()
如果使用readXXX()读取,对于大多数XXX值，都必须使用writeXXX()

可使用下面的两种正确方法进行将byte数组转为Object

public static Object toObject(byte[] bytes) {
    
	Object obj = null; 
	try {
    
 
		FileOutputStream fos = new FileOutputStream("d://a.txt"); 
		ObjectOutputStream oos = new ObjectOutputStream(fos); 
		oos.writeObject(bytes); 
 
		ObjectInputStream ois = new ObjectInputStream(new FileInputStream( 
				"d://a.txt")); 
		return ois.readObject(); 
	} catch (IOException ex) {
    
		ex.printStackTrace(); 
	} catch (ClassNotFoundException e) {
    
		e.printStackTrace(); 
	} 
	return obj; 
} 

public static Object toObject2(byte[] bytes) {
    
	Object obj = new Object(); 
	ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
	ObjectOutputStream oos; 
	try {
    
		oos = new ObjectOutputStream(baos); 
		oos.writeObject(bytes); 
		byte[] strData = baos.toByteArray(); 
 
		ByteArrayInputStream bais = new ByteArrayInputStream(strData); 
		ObjectInputStream ois = new ObjectInputStream(bais); 
		obj = ois.readObject(); 
	} catch (IOException e) {
    
		e.printStackTrace(); 
	} catch (ClassNotFoundException e) {
    
		e.printStackTrace(); 
	} 
 
	return obj; 
}