如何在spring boot中重写java.sql.Array描述符和java.sql.ARRAY？

在Spring Boot中重写java.sql.Array描述符和java.sql.ARRAY，可以通过自定义实现JDBC的Array接口来实现。

首先，需要创建一个类来实现java.sql.Array接口，并重写其中的方法。具体步骤如下：

创建一个类，例如CustomArray，实现java.sql.Array接口。

import java.sql.Array;
import java.sql.SQLException;

public class CustomArray implements Array {
    // 实现Array接口中的方法
    // ...

    @Override
    public String getBaseTypeName() throws SQLException {
        // 返回数组元素的类型名称
        return "VARCHAR";
    }

    @Override
    public int getBaseType() throws SQLException {
        // 返回数组元素的SQL类型
        return java.sql.Types.VARCHAR;
    }

    // 其他方法的实现
    // ...
}

在CustomArray类中，根据需要重写Array接口中的其他方法，例如getArray、getResultSet等方法。

@Override
public Object getArray() throws SQLException {
    // 返回数组的Java对象表示
    // ...
}

@Override
public Object getArray(Map<String, Class<?>> map) throws SQLException {
    // 返回数组的Java对象表示，并根据给定的映射将数组元素转换为指定的Java类
    // ...
}

@Override
public Object getArray(long index, int count) throws SQLException {
    // 返回从指定索引开始的指定数量的数组元素的Java对象表示
    // ...
}

// 其他方法的重写
// ...

在Spring Boot的配置文件中，配置自定义的Array实现类。

spring.datasource.url=jdbc:mysql://localhost:3306/db_example
spring.datasource.username=username
spring.datasource.password=password
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.tomcat.initSQL=SET NAMES utf8mb4 COLLATE utf8mb4_unicode_ci
spring.datasource.tomcat.connection-properties=useUnicode=true;characterEncoding=utf-8

# 配置自定义的Array实现类
spring.datasource.tomcat.factory.customizers=com.example.CustomArrayFactoryCustomizer

创建一个类，例如CustomArrayFactoryCustomizer，实现TomcatDataSourceCustomizer接口，并在其中配置自定义的Array实现类。

import org.apache.tomcat.jdbc.pool.DataSource;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadata;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProvider;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapterAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapterAdapterAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapterAdapter;
import org.springframework.boot.jdbc.metadata.TomcatDataSourcePoolMetadataProviderFactory.TomcatDataSourcePoolMetadataProviderFactoryAdapter.TomcatDataSourcePoolMetadataProviderAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter.TomcatDataSourcePoolMetadataProviderFactoryAdapterAdapterAdapter