1.从inputFile文件中获取内容,读入到set对象;
2.然后通过ObjectOutputStream将该对象保存到outputFile文件中;
3.最后通过ObjectInputStream从outputFile文件中重新读出set对象。
public static void objectWriteAndRead(String inputFile, String outputFile) {
System.out.println("objectWriteAndRead ...");
try {
BufferedReader bufferedReader = new BufferedReader(new FileReader(inputFile));
String line = null;
Set<String> hashSet = new HashSet<>();
while (null != (line = bufferedReader.readLine())) {
hashSet.add(line);
}
System.out.println("hashSet.size:" + hashSet.size());
System.out.println(hashSet.toString()); //write object
ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream(outputFile));
objectOutputStream.writeObject(hashSet);
objectOutputStream.close(); //read object
ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream(outputFile));
Set<String> objectRead = (Set<String>) objectInputStream.readObject();
System.out.println("objectRead.getClass:" + objectRead.getClass());
System.out.println("objectRead:\n" + objectRead.toString()); } catch (Exception error) {
error.printStackTrace();
}
}