提供源代码

很抱歉，我无法为您提供完整的源代码，因为这需要根据您的具体需求和数据库结构进行编写。但是，我可以提供一些示例代码，帮助您开始编写基于Java Web的数据库管理系统。

以下是一个简单的示例，用于连接到MySQL数据库并执行查询操作：

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DatabaseConnection {
    private Connection connection;
    private Statement statement;
    private ResultSet resultSet;

    public DatabaseConnection() {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");
            statement = connection.createStatement();
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        }
    }

    public ResultSet executeQuery(String query) {
        try {
            resultSet = statement.executeQuery(query);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return resultSet;
    }

    public void close() {
        try {
            if (resultSet != null) {
                resultSet.close();
            }
            if (statement != null) {
                statement.close();
            }
            if (connection != null) {
                connection.close();
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

上面的代码用于连接到MySQL数据库并执行查询操作。您可以根据需要修改代码，以便执行其他类型的操作，例如插入、更新和删除。

以下是一个简单的示例，用于创建基于Spring MVC的Web应用程序：

@Controller
public class MyController {
    @Autowired
    private PersonDAO personDAO;

    @RequestMapping("/person")
    public ModelAndView person() {
        List<Person> persons = personDAO.getAllPersons();
        ModelAndView mav = new ModelAndView("person");
        mav.addObject("persons", persons);
        return mav;
    }
}

@Repository
public class PersonDAOImpl implements PersonDAO {
    @Autowired
    private SessionFactory sessionFactory;

    @SuppressWarnings("unchecked")
    public List<Person> getAllPersons() {
        Session session = sessionFactory.getCurrentSession();
        Query query = session.createQuery("from Person");
        return query.list();
    }
}

@Entity
@Table(name = "person")
public class Person {
    @Id
    @GeneratedValue
    @Column(name = "id")
    private int id;

    @Column(name = "name")
    private String name;

    // Getters and setters
}

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.example")
public class AppConfig {
    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }

    @Bean(name = "dataSource")
    public DriverManagerDataSource dataSource() {
        DriverManagerDataSource driverManagerDataSource = new DriverManagerDataSource();
        driverManagerDataSource.setDriverClassName("com.mysql.jdbc.Driver");
        driverManagerDataSource.setUrl("jdbc:mysql://localhost:3306/mydatabase");
        driverManagerDataSource.setUsername("username");
        driverManagerDataSource.setPassword("password");
        return driverManagerDataSource;
    }

    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan("com.example");
        Properties hibernateProperties = new Properties();
        hibernateProperties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
        sessionFactory.setHibernateProperties(hibernateProperties);
        return sessionFactory;
    }

    @Bean
    public HibernateTransactionManager transactionManager() {
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(sessionFactory().getObject());
        return transactionManager;
    }
}

上面的代码用于创建基于Spring MVC的Web应用程序，并使用Hibernate连接到MySQL数据库。代码中的Person类表示数据库中的一个表，PersonDAOImpl类用于执行查询操作。

希望这些示例代码能够帮助您开始编写基于Java Web的数据库管理系统。