java json字符串转listmap

可以使用Jackson库来将JSON字符串转换为List

示例代码：

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

import java.util.List;
import java.util.Map;

public class JsonToListMap {
    public static void main(String[] args) {
        String json = "[{\"name\":\"John\",\"age\":30},{\"name\":\"Jane\",\"age\":25}]";

        ObjectMapper objectMapper = new ObjectMapper();
        try {
            List<Map<String, Object>> list = objectMapper.readValue(json, new TypeReference<List<Map<String, Object>>>() {});
            System.out.println(list);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

输出结果：

[{name=John, age=30}, {name=Jane, age=25}]

解析过程：

1. 定义JSON字符串：String json = "[{\"name\":\"John\",\"age\":30},{\"name\":\"Jane\",\"age\":25}]";
2. 创建ObjectMapper对象：ObjectMapper objectMapper = new ObjectMapper();
3. 调用objectMapper.readValue()方法将JSON字符串转换为List<Map<String, Object>>对象：List<Map<String, Object>> list = objectMapper.readValue(json, new TypeReference<List<Map<String, Object>>>() {});
4. 输出转换后的List