ibatis基础

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
   "http://ibatis.apache.org/dtd/sql-map-2.dtd">

<sqlMap>
    <!-- 通过typeAlias使得我们在下面使用Student实体类的时候不需要写包名 -->
    <typeAlias alias="User" type="com.extjstest.entity.User" />
    
    <resultMap id="userMap" class="user">
        <result property="userid" column="ID"/>
        <result property="username" column="NAME"/>
    </resultMap>
    

    <!-- resultClass 返回的类型 -->
    <select id="selectAllUser" resultClass="User" resultMap="userMap">
        select * from
        user_manage where 1=1
        <isNotEmpty prepend="and" property="userid">
            ID=#userid#
        </isNotEmpty>
        
    </select>
      
    <select id="countUser" resultClass="int">
        select count(*) from
        user_manage 
    </select>
    
    <select id="selectUserById" parameterClass="int" resultClass="User">
        select * from user_manage where ID=#userid#
    </select>
    
    
    <insert id="addUser" parameterClass="User">
        insert into
        user_manage(ID,NAME) values
        (#userid#,#username#)
    </insert>  
    
    <delete id="deleteUserById" parameterClass="int">
        delete from user_manage where ID=#userid#
    </delete>  

    <update id="updateUser" parameterClass="User">
        update user_manage set
        NAME=#username# where ID=#userid#
    </update>
</sqlMap>