mybatisPlus中postgreSql数组字段类型处理

在MyBatis Plus中处理PostgreSQL数组字段类型，可以通过自定义TypeHandler来实现。以下是一个简单的例子，展示了如何处理字符串数组类型（text[]）。

首先，创建一个自定义TypeHandler：

import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.postgresql.util.PGobject;
 
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.List;
 
public class StringArrayTypeHandler extends BaseTypeHandler<List<String>> {
 
    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, List<String> parameter, JdbcType jdbcType) throws SQLException {
        PGobject pgObject = new PGobject();
        pgObject.setType("text[]");
        pgObject.setValue(arrayToString(parameter));
        ps.setObject(i, pgObject);
    }
 
    @Override
    public List<String> getNullableResult(ResultSet rs, String columnName) throws SQLException {
        return stringToArray(rs.getString(columnName));
    }
 
    @Override
    public List<String> getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return stringToArray(rs.getString(columnIndex));
    }
 
    @Override
    public List<String> getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return stringToArray(cs.getString(columnIndex));
    }
 
    private String arrayToString(List<String> list) {
        return "{" + String.join(",", list) + "}";
    }
 
    private List<String> stringToArray(String str) {
        if (str == null) {
            return null;
        }
        return Arrays.asList(str.substring(1, str.length() - 1).split(","));
    }
}

然后，在MyBatis Plus的配置中注册这个TypeHandler：

import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.baomidou.mybatisplus.core.MybatisConfiguration;
import com.baomidou.mybatisplus.core.MybatisSqlSessionFactoryBuilder;
 
@Configuration
public class MyBatisPlusConfig {
 
    @Bean
    public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {
        MybatisSqlS