Java序列化和JSON字符串都是Java中用于數(shù)據(jù)傳輸和存儲的方式，下面分別介紹一下。

Java序列化

Java序列化是Java中用于將對象轉(zhuǎn)換為字節(jié)序列的過程，方便在網(wǎng)絡(luò)或本地文件中進(jìn)行存儲和傳輸。Java序列化需要實(shí)現(xiàn)Serializable接口，并使用ObjectInputStream和ObjectOutputStream進(jìn)行讀寫。

public class Person implements Serializable {
private String name;
private int age;
// getters and setters
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", age='" + age + '\'' +
'}';
}
}
public static void main(String[] args) {
Person person = new Person("Jack", 25);
try {
FileOutputStream fileOut = new FileOutputStream("/tmp/person.ser");
ObjectOutputStream out = new ObjectOutputStream(fileOut);
out.writeObject(person);
out.close();
fileOut.close();
} catch (IOException e) {
e.printStackTrace();
}
Person deserializedPerson = null;
try {
FileInputStream fileIn = new FileInputStream("/tmp/person.ser");
ObjectInputStream in = new ObjectInputStream(fileIn);
deserializedPerson = (Person) in.readObject();
in.close();
fileIn.close();
} catch (IOException | ClassNotFoundException e) {
e.printStackTrace();
}
System.out.println(deserializedPerson); // Person{name='Jack', age='25'}
}

JSON字符串

JSON是一種輕量級的數(shù)據(jù)交換格式，常用于網(wǎng)絡(luò)傳輸和存儲。Java中可以使用第三方庫如Jackson或Gson進(jìn)行JSON字符串的序列化和反序列化。

public class Person {
private String name;
private int age;
// getters and setters
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", age='" + age + '\'' +
'}';
}
}
public static void main(String[] args) {
ObjectMapper objectMapper = new ObjectMapper();
Person person = new Person("Jack", 25);
try {
FileWriter fileWriter = new FileWriter("/tmp/person.json");
objectMapper.writeValue(fileWriter, person);
fileWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
String json = "{\"name\":\"Jack\",\"age\":25}";
try {
Person deserializedPerson = objectMapper.readValue(json, Person.class);
System.out.println(deserializedPerson); // Person{name='Jack', age='25'}
} catch (JsonProcessingException e) {
e.printStackTrace();
}
}