Java中Json转List(Jackson)

Jackson是一个常用的Java序列化和反序列化库，可以方便地将Json数据转换为Java对象。需要先在pom.xml中添加Jackson库的依赖：

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.13.0</version>
</dependency>

然后使用ObjectMapper的readValue方法将Json数据转换为List对象：

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.util.List;
public class Main {
    public static void main(String[] args) throws Exception {
        String json = "[{\"name\":\"Tom\",\"age\":18},{\"name\":\"Jerry\",\"age\":20}]";
        ObjectMapper objectMapper = new ObjectMapper();
        List<Person> personList = objectMapper.readValue(json, new TypeReference<List<Person>>(){});
        System.out.println(personList);
    }
}

class Person {
    private String name;
    private int age;
    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; }
    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}