how can I save an object in the file???

Question

e.g I have an Object obj,how can I save all its information such as m.getName();m.getFamily() and the others in the file???

Answer 1

You may be after serialization.

Answer 2

since xml is more readable and transferable, i use Simple Framework, or as mentioned you could do simple serialization.

Answer 3

Using an ObjectOutputStream you can write the object directly into the file.

 ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream("filename.dat")));
 out.writeObject(obj);
 out.close();

This writes the Object obj out to the file. It can be read back in use an ObjectInputStream().

Answer 4

If you just need to store the object and retrieve it back as a whole , better go with serialization.

In case, you want a readable file with the contents of the object , use file-IO API to write the contents to a file.

Answer 5

Yet another answer, but Apache Commons Lang has SerializationUtils

SerializationUtils.serialize(Serializable obj, OutputStream outputStream).

Answer 6

My workplace uses XStream, if ObjectOutputStream doesn't do the job.

Answer 7

You can use Xstream to write objects to xml files.