How Java uses fastjson serialization and deserialization
FastJSON is a high-performance JSON processing framework open-source by Alibaba, which can achieve mutual conversion between Java objects and JSON strings, and supports serialization and deserialization of complex object nesting and generics. Fastjson has the following characteristics:
1. Fast: FastJSON has a faster JSON encoding and decoding speed compared to other JSON processing frameworks.
2. Low memory consumption: Fastjson adopts a direct memory graph model to reduce string duplication.
3. Usability: Fastjson provides a simple and easy-to-use API that can be flexibly configured and used.
4. Compatibility: Fastjson supports automatic parsing of JavaBeans, arrays, Collections, strings, numbers, and other types.
The commonly used methods of Fastjson include serialization and deserialization, and the following is sample code that introduces these methods:
1. JSON serialization example:
import com.alibaba.fastjson.JSON;
public class Person {
private String name;
private int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public static void main(String[] args) {
Person person = new Person("Alice", 20);
//Serializing Java objects into JSON strings
String jsonString = JSON.toJSONString(person);
System.out.println(jsonString);
}
}
Output results:
{"age":20,"name":"Alice"}
2. JSON deserialization example:
import com.alibaba.fastjson.JSON;
public class Person {
private String name;
private int age;
public Person() {
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public static void main(String[] args) {
String jsonString = "{\"age\":20,\"name\":\"Alice\"}";
//Deserialize JSON strings into Java objects
Person person = JSON.parseObject(jsonString, Person.class);
System.out.println(person.getName());
System.out.println(person.getAge());
}
}
Output results:
Alice
20
If Maven is used to build a project, the following dependencies can be added to the pom.xml of the project:
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.78</version>
</dependency>
