MyBatis支持數據庫的存儲過程和函數,可以通過調用存儲過程和函數來執行數據庫操作。以下是在MyBatis中使用存儲過程和函數的一般步驟:
<select id="callProcedure" statementType="CALLABLE">
{call procedure_name(#{param1, mode=IN, jdbcType=VARCHAR}, #{param2, mode=OUT, jdbcType=INTEGER})}
</select>
Map<String, Object> paramMap = new HashMap<>();
paramMap.put("param1", "value1");
paramMap.put("param2", null);
MyMapper mapper = sqlSession.getMapper(MyMapper.class);
mapper.callProcedure(paramMap);
// 獲取存儲過程或函數的返回結果
Integer result = (Integer) paramMap.get("param2");
<typeHandlers>
<typeHandler javaType="java.lang.Integer" jdbcType="INTEGER" callback="MyIntegerTypeHandler"/>
</typeHandlers>
public class MyIntegerTypeHandler extends BaseTypeHandler<Integer> {
@Override
public void setNonNullParameter(PreparedStatement ps, int i, Integer parameter, JdbcType jdbcType) throws SQLException {
ps.setInt(i, parameter);
}
@Override
public Integer getNullableResult(ResultSet rs, String columnName) throws SQLException {
return rs.getInt(columnName);
}
@Override
public Integer getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
return rs.getInt(columnIndex);
}
}
通過以上步驟,可以在MyBatis中支持數據庫的存儲過程和函數,并通過Mapper接口方法來調用和執行存儲過程和函數。