SpringBoot如何从MongoDB的json字符串字段查询？

Question

pom引入

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-mongodb</artifactId>
    <version>2.3.12.RELEASE</version>
</dependency>

实体类

@Data
public class Person {
    private String id;
    private String name;
    private int age;
    private String data;
}

查询类

@Service
public class MongoService {
    @Resource
    private MongoTemplate mongoTemplate;

    public Person findPerson()
    {
        // Person person = new Person();
        // person.setName("ace");
        // person.setAge(23);
        // person.setData("{\"accounts\":{\"balance\":100,\"ext\":\"hi1\"}}");
        // mongoTemplate.insert(person);
        BasicQuery q1 = new BasicQuery("{ age : { $lt : 30 }}");
        System.out.println(mongoTemplate.find(q1, Person.class));
        BasicQuery q2 = new BasicQuery("{ data.accounts.balance : { $gt : 500 }}");
        System.out.println(mongoTemplate.find(q2, Person.class));

        return mongoTemplate.findOne(new Query(where("name").is("ace")), Person.class);
    }
}

数据

好像data字段的数据格式不对，该怎么存入呢？

文档地址

https://docs.spring.io/spring-data/mongodb/docs/current/reference/html/#mongo.query

报错