Example example = new Example(TerminalType.class);
//注意：排序使用的是列名
example.setOrderByClause("TT_PROVIDERID DESC");
//如果需要其他條件
//掌機類型名字
//條件查詢使用的是屬性名
example.createCriteria().andEqualTo("terminalName", "計量現(xiàn)場服務(wù)終端");
//廠商id大于3
// example.createCriteria().andGreaterThan("id",3);
List<TerminalType> terminalTypeList = terminalTypeService.selectByExample(example);

/**
     * 按照指定排序查詢集合
     *
     * @param example - 條件
     * @return count
     */
    List<T> selectByExample(Object example);

 @Override
    public List<T> selectByExample(Object example) {
        return baseMapper.selectByExample(example);
    }

example.orderBy(BaseEntity.Field.GMTUpdate + " desc");

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<setting name="cacheEnabled" value="false"/>
<!--解決插入null的時候報錯問題-->
<setting name="jdbcTypeForNull" value="NULL"/>
</settings>
</configuration>

public interface SequenceMapper
{
@Select("select SEQ_${tableName}.nextval from dual")
int getSequence(@Param("tableName") String tableName);
}