Java 数据库交互框架的未来趋势：NoSQL、云原生和微服务

import org.springframework.data.<a style='color:#f60; text-decoration:underline;' href="//m.sbmmt.com/zt/16002.html" target="_blank">mongodb</a>.core.MongoOperations;
import org.springframework.data.mongodb.core.query.BasicQuery;

import java.util.List;

public class MongoExample {

    public static void main(String[] args) {
        MongoOperations mongoOps = // Initialize your MongoOperations instance

        BasicQuery query = new BasicQuery("{ 'name': 'John' }");
        List<User> users = mongoOps.find(query, User.class);
        for (User user : users) {
            System.out.println(user.getName());
        }
    }
}

class User {
    private String name;

    // Getters and setters
}

import com.google.cloud.sql.jdbc.ConnectionPoolFactory;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class CloudSqlExample {

    public static void main(String[] args) throws Exception {
        ConnectionPoolFactory connectionPoolFactory = // Initialize your ConnectionPoolFactory instance

        Connection connection = connectionPoolFactory.createConnection();
        PreparedStatement stmt = connection.prepareStatement("SELECT * FROM users WHERE name = ?");
        stmt.setString(1, "John");
        ResultSet rs = stmt.executeQuery();
        while (rs.next()) {
            System.out.println(rs.getString("name"));
        }
        connection.close();
    }
}

import org.springframework.cloud.data.jdbc.repository.Query;
import org.springframework.cloud.data.jdbc.repository.SqlRepository;

public interface UserRepository extends SqlRepository<User, Long> {

    @Query("SELECT * FROM users WHERE name = :name")
    List<User> findByName(@Param("name") String name);
}