Java tutorial
//package com.java2s; //License from project: Apache License import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectOutputStream; import java.io.Serializable; public class Main { public static String cacheDir; public static void put_(String key, Serializable value) { ByteArrayOutputStream baos = null; ObjectOutputStream oos = null; try { baos = new ByteArrayOutputStream(); oos = new ObjectOutputStream(baos); oos.writeObject(value); byte[] data = baos.toByteArray(); put(key, data); } catch (Exception e) { e.printStackTrace(); } finally { try { oos.close(); } catch (IOException e) { } } } public static void put(String key, byte[] value) { File file = newFile(key); FileOutputStream out = null; try { out = new FileOutputStream(file); out.write(value); } catch (Exception e) { e.printStackTrace(); } finally { if (out != null) { try { out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } } } } public static File newFile(String key) { return new File(cacheDir, key); } }