追加、削除、変更は通常値を返しません。クエリは通常リスト<User>です。idクエリによると、Userオブジェクトを返します。
テーブルに挿入（フィールド名1、フィールド名2 ...）値（値1、値2 ...）;
テーブルから削除
update table table set field name = 'value to be changed' where where ...
//
ページングクエリPageInfo <User> findByPage（String companyId、int pageNum、int PageSize）;
//すべての部門を照会します
List <User> findAll（String companyId）;
//保存
void save（User user）;
//更新
void update（User user）;
//
void delete（String id）;を削除します
//
ユーザーのfindById（String id）をIDでクエリします
SQLステートメントをXMLで記述する場合：
<？xml version = "1.0" encoding = "UTF-8"？>
<！DOCTYPE mapper PUBLIC "-// mybatis.org//DTD Mapper 3.0 // EN" "http://mybatis.org/dtd/mybatis -3-mapper.dtd ">
<mapper namespace =" cn.itcast.dao.system.UserDao ">
<resultMap id =" BaseResultMap "type =" cn.itcast.domain.system.User ">
<id column =" user_id "property =" id "/>
<result column =" dept_id "property =" deptId "/>
<result column =" email "property =" email "/>
<result column =" user_name "property =" userName "/ >
<result column = "password" property = "password" />
<result column = "state"property = "state" />
<result column = "company_id" property = "companyId" />
<result column = "company_name" property = "companyName" />
<result column = "dept_name" property = "deptName" />
<result column = "manager_id" property = "managerId" />
<result column = "join_date" property = "joinDate" />
<result column = "salary" property = "salary" />
<result column = "birthday"プロパティ= "birthday" />
<result column = "gender" property = "gender" />
<result column = "station" property = "station" />
<result column = "telephone" property = "telephone" />
<result column = "degree" property = "degree"
/>
<result column = "remark" property = "remark" />
< result column = "order_no" property = "orderNo" /> </ resultMap>
<！-企業
IDごとにすべてを照会-> <select id = "findAll" resultMap = "BaseResultMap">
select * from pe_user where company_id =＃{companyId}
</ select>
<！-根拠id查询->
<select id = "findById" resultMap = "BaseResultMap">
select * from pe_user where user_id =＃{id}
</ select>
<！-根拠id删除->
<delete id = "delete">
pe_userから削除しますuser_id =＃{id}
</ delete>
<！-保存->
<insert id = "save">
pe_userに挿入（user_id、dept_id、email、user_name、password、state、company_id、
company_name、dept_name、manager_id、join_date、salary、birthday、
gender、station、電話、学位、備考、order_no）の
値（＃{id}、＃{deptId}、＃{email}、＃{userName}、＃{password}、＃{state}、＃{companyId}、
＃{companyName}、 ＃{deptName}、＃{managerId}、＃{joinDate}、＃{salary}、＃{birthday}、
＃{gender}、＃{station}、＃{telephone}、＃{degree}、＃{remark}、 ＃{orderNo}）
</挿入>
<！-更新->
<update id = "update">
update pe_user
set dept_id =＃{deptId}、
email =＃{email}、
user_name =＃{userName}、
password =＃{password}、
state =＃ {state}、
company_id =＃{companyId}、
company_name =＃{companyName}、
dept_name =＃{deptName}、
manager_id =＃{managerId}、
join_date =＃{joinDate}、
salary =＃{salary}、
誕生日=＃{誕生日}、
性別=＃{gender}、
駅=＃{station}、
電話=＃{telephone}、
程度=＃{degree
}、
remark =＃{remark} 、order_no =＃{orderNo}
where user_id =＃{id }
</ update>
</ mapper>