mybatis连接PGSQL中对于json和jsonb的处理方法

 
import com.alibaba.fastjson.JSON;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedTypes;
import org.postgresql.util.PGobject;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
/**
 *  PGJsonTypeHandler:处理Object对象类型与postgresql中JSONB类型之间的转换
 *  author:lipu
 *  created_at:2021/07/29 14:00
 */
@SuppressWarnings("unchecked")
@MappedTypes(value = {Object.class})
public class PGJsonbTypeHandler<T extends Object> extends BaseTypeHandler<T> {
    private static final PGobject pgObject = new PGobject();
    @Override
    public void setNonNullParameter(PreparedStatement preparedStatement, int i, T parameter, JdbcType jdbcType) throws SQLException {
        if (preparedStatement != null) {
            pgObject.setType("jsonb");
            pgObject.setValue(JSON.toJSONString(parameter));
            preparedStatement.setObject(i, pgObject);
        }
    }
    @Override
    public T getNullableResult(ResultSet rs, String columnName) throws SQLException {
        return (T) JSON.parse(rs.getString(columnName));
    }
    @Override
    public T getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return (T) JSON.parse(rs.getString(columnIndex));
    }
    @Override
    public T getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return (T) JSON.parse(cs.getString(columnIndex));
    }
}

    @TableField(typeHandler = PGJsonbTypeHandler.class) // 用于 PostgreSQL 的 JSONB 类型
    private ShipToAddr shipToAddr;