Interface ColumnMapper<T>

Type Parameters:

T - 列类型

All Known Implementing Classes:

EnumColumnMapper, OptionalColumnMapper, SerializationColumnMapper

public interface ColumnMapper<T>

列转换器

Author:

Maning

Method Summary

Modifier and Type	Method	Description
default boolean	canRead(Type type, Configuration configuration)	是否可读
T	read(ResultSet rs, int columnIndex, Type type, Configuration configuration)	从ResultSet读取值,请确保安全或已使用canRead(Type, Configuration) 测试
boolean	write(PreparedStatement ps, int parameterIndex, T value, Configuration configuration)	写入值到PreparedStatement

Method Details

canRead

default boolean canRead(Type type,
 Configuration configuration)

是否可读

Parameters:

type - 类型

configuration - 配置

Returns:

是否可读

read

T read(ResultSet rs,
 int columnIndex,
 Type type,
 Configuration configuration)
throws SQLException

从ResultSet读取值,请确保安全或已使用canRead(Type, Configuration) 测试

Parameters:

rs - 结果集

columnIndex - rs使用的columnIndex, 从1开始

type - 类型

configuration - 配置

Returns:

值 允许返回null

Throws:

SQLException - 原生SQL异常

write

boolean write(PreparedStatement ps,
 int parameterIndex,
 T value,
 Configuration configuration)
       throws SQLException

写入值到PreparedStatement

Parameters:

ps - PreparedStatement

parameterIndex - ps使用的parameterIndex,从1开始

value - 值,不会为null

configuration - 配置

Returns:

是否已写入

Throws:

SQLException - 原生SQL异常