Jackson json转list对象,代码编译测试 - 在线编译器(yxjc123.com)

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import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;

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

/**
 *2. json转list对象
 */
public class JSON2List {
    //JSON转java对象
    public static void main(String[] args) {
        try {
            ObjectMapper objectMapper = new ObjectMapper();
            //JSON转list
            String listJson = "[{\"name\":\"张三\",\"age\":21,\"address\":\"深圳\"}," + "{\"name\":\"李四\",\"age\":11,\"address\":\"武汉\"}," + "{\"name\":\"王五\",\"age\":31,\"address\":\"北京\"}]";
            JavaType javaType1 = objectMapper.getTypeFactory().constructParametricType(ArrayList.class, User.class);
            List< User > userList = (List < User > ) objectMapper.readValue(listJson, javaType1);
            for (User user1: userList) {
                System.out.println(user1.getName() + "\t" + user1.getAge() + "\t" + user1.getAddress());
            }
        } catch(IOException e) {
            e.printStackTrace();
        }
    }
}
//User.java
 class User {
    private String name;
    private Integer age;
    private String address;
    public User(){

    }
    public User(String name, Integer age, String address) {
        super();
        this.name = name;
        this.age = age;
        this.address = address;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
}
​x
 
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
​
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
​
/**
 *2. json转list对象
 */
public class JSON2List {
    //JSON转java对象
    public static void main(String[] args) {
        try {
            ObjectMapper objectMapper = new ObjectMapper();
            //JSON转list
            String listJson = "[{\"name\":\"张三\",\"age\":21,\"address\":\"深圳\"}," + "{\"name\":\"李四\",\"age\":11,\"address\":\"武汉\"}," + "{\"name\":\"王五\",\"age\":31,\"address\":\"北京\"}]";
            JavaType javaType1 = objectMapper.getTypeFactory().constructParametricType(ArrayList.class, User.class);
            List< User > userList = (List < User > ) objectMapper.readValue(listJson, javaType1);
            for (User user1: userList) {
                System.out.println(user1.getName() + "\t" + user1.getAge() + "\t" + user1.getAddress());
            }
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