ibatis 的一个小例子

 

而在sqlmap中$是用来替换变量的

 

<?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 namespace="com.soft.dao">
 <typeAlias alias="user" type="com.soft.model.User"/>

 <resultMap  id="ResultMap" class="user">
    <result column="id" property="id" jdbcType="VARCHAR"/>
    <result column="username" property="userName" jdbcType="VARCHAR"/>
    <result column="password" property="passWord" jdbcType="VARCHAR"/>
 </resultMap>

 

   <!-- 查询方法 -->
  <select id="selectUserById" resultMap="ResultMap" parameterClass="String">
   select id,username,userpassword from t_sys_user
   where  id=#value#
  </select>

 

  <select id="selectUserByparam" resultMap="ResultMap" parameterClass="user">
     select id,username,userpassword from t_sys_user
     where 1=1
     <isNotNull property="id" prepend="AND">
          id = #id:VARCHAR#
     </isNotNull>
     <isNotNull property="userName" prepend="AND">
         username = #userName:VARCHAR#
     </isNotNull>
     <isNotNull property="passWord" prepend="AND">
        password = #passWord:VARCHAR#
     </isNotNull>
  </select>
    
 <!-- 插入方法 -->
 <insert id="inserUser" parameterClass="user">
    insert into t_sys_user(id,username,password)
    values(#id:VARCHAR#,#userName:VARCHAR#,#passWord:VARCHAR#)
 </insert>
 
 <!-- 删除方法 -->
 <delete id="deleteById" parameterClass="String">
     delect from t_sys_user where id=#value#
 </delete>
 
  <!-- 修改方法 -->
 <update id="updatUserByparam" parameterClass="user">
    update t_sys_user
    <dynamic prepend="set">
    <isNotNull prepend="," property="username">
       username = #username:VARCHAR#
    </isNotNull>
    <isNotNull prepend="," property="password">
       password= #password:VARCHAR#
    </isNotNull>
    </dynamic>
    where id=#id:INTEGER#
 </update>
 
 <update id="updateUser" parameterClass="user">
     update t_sys_user
        set
            username = #username:VARCHAR#,
            password = #password:VARCHAR#
     where  id = #id:INTEGER#
 </update>
</sqlMap>