Question

如何把List<HashMap<String, String>>转换为byte[]？

Answer 1

java.io.ByteArrayOutputStream + ObjectOutputStream

全写到java.io.ByteArrayOutputStream，再使用java.io.ByteArrayOutputStream.toByteArray()

追问

能不能写出详细代码提示下？本人初学啊。。

追答

public class WriteObjectDemo {
public static void main(String[] args) throws IOException, ClassNotFoundException {
// 源ArrayList 是 list
ByteArrayOutputStream bou = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(bou);
out.writeObject(list);
out.flush();
byte[] bin = bou.toByteArray();
out.close();
bou.close();

ByteArrayInputStream bin2 = new ByteArrayInputStream(bin);
ObjectInputStream in_ = new ObjectInputStream(bin2);
// 新ArrayList
ArrayList> list2 = (ArrayList>) in_.readObject();
in_.close();
bin2.close();

System.out.println("源ArrayList:"+list);
System.out.println(Arrays.toString(bin));
System.out.println("新ArrayList:"+list2);
}
}