@Overridepublic Manager queryManagerByName(String name) { ? ?Logger.debug("queryManagerByName and name:{}", name); ? ?if (StringUtils.isEmpty(name)) { ? ? ? ?Logger.error("queryManagerByName fail due to name is empty...."); ? ? ? ?return null; ? ?} ? ?return managerMapper.queryManagerByName(name);}這里的name明明是個(gè)字符串，但是在sql中卻是鍵值對(duì)了，而且還能正確運(yùn)行，完全沒(méi)毛病，求解釋一下。難道m(xù)ybatis會(huì)自動(dòng)把字符串轉(zhuǎn)成鍵值對(duì)？以參數(shù)名作為鍵，已參數(shù)值作為值？最后，select * 是不是太業(yè)余了？換成select 主鍵 from。。。會(huì)不會(huì)效率高一點(diǎn)呢？<select id="queryManagerByName" parameterType="java.util.Map" resultMap="manager"> ? select * from ls_manager where username = #{name}</select>