杰克逊- Java对象与List<Map<String，String>>到Json字符串的转换

import com.fasterxml.jackson.databind.ObjectMapper;

public class JacksonExample {
    public static void main(String[] args) {
        // 创建一个Java对象
        Person person = new Person("John", 25);

        // 创建ObjectMapper对象
        ObjectMapper objectMapper = new ObjectMapper();

        try {
            // 将Java对象转换为JSON字符串
            String jsonString = objectMapper.writeValueAsString(person);
            System.out.println(jsonString);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

class Person {
    private String name;
    private int age;

    // 构造函数、getter和setter方法省略

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
}

import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class JacksonExample {
    public static void main(String[] args) {
        // 创建一个List<Map<String, String>>对象
        List<Map<String, String>> dataList = new ArrayList<>();

        // 创建一个Map对象
        Map<String, String> data1 = new HashMap<>();
        data1.put("name", "John");
        data1.put("age", "25");
        dataList.add(data1);

        // 创建ObjectMapper对象
        ObjectMapper objectMapper = new ObjectMapper();

        try {
            // 将List<Map<String, String>>转换为JSON字符串
            String jsonString = objectMapper.writeValueAsString(dataList);
            System.out.println(jsonString);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}