Джексон – Преобразование строки массива JSON в список

	// JSON array string
	// [{"name":"mkyong", "age":37}, {"name":"fong", "age":38}]
	
	ObjectMapper mapper = new ObjectMapper();
	String json = "[{\"name\":\"mkyong\", \"age\":37}, {\"name\":\"fong\", \"age\":38}]";
	
	// 1. convert JSON array to Array objects
	Person[] pp1 = mapper.readValue(json, Person[].class);
	
	// 2. convert JSON array to List of objects
	List ppl2 = Arrays.asList(mapper.readValue(json, Person[].class));

	
		com.fasterxml.jackson.core
		jackson-databind
		2.9.8
	

[{"name":"mkyong", "age":37}, {"name":"fong", "age":38}]

package com.mkyong;

public class Person {

    String name;
    Integer age;

    //getters and setters
}

package com.mkyong;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;

public class JacksonArrayExample {

    public static void main(String[] args) {

        ObjectMapper mapper = new ObjectMapper();
        String json = "[{\"name\":\"mkyong\", \"age\":37}, {\"name\":\"fong\", \"age\":38}]";

        try {

            // 1. convert JSON array to Array objects
            Person[] pp1 = mapper.readValue(json, Person[].class);

            System.out.println("JSON array to Array objects...");
            for (Person person : pp1) {
                System.out.println(person);
            }

            // 2. convert JSON array to List of objects
            List ppl2 = Arrays.asList(mapper.readValue(json, Person[].class));

            System.out.println("\nJSON array to List of objects");
            ppl2.stream().forEach(x -> System.out.println(x));

            // 3. alternative
            List pp3 = mapper.readValue(json, new TypeReference>() {});

            System.out.println("\nAlternative...");
            pp3.stream().forEach(x -> System.out.println(x));

        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

1. JSON array to Array objects...
Person{name='mkyong', age=37}
Person{name='fong', age=38}

2. JSON array to List of objects
Person{name='mkyong', age=37}
Person{name='fong', age=38}

3. Alternative...
Person{name='mkyong', age=37}
Person{name='fong', age=38}