src/com/mapper/AllusersMapper.xml

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<?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="com.dao.AllusersMapper">
  <resultMap id="BaseResultMap" type="com.entity.Allusers">
    <id column="id" jdbcType="INTEGER" property="id" />
	<result column="username" jdbcType="VARCHAR" property="username" />
    <result column="pwd" jdbcType="VARCHAR" property="pwd" />
    <result column="cx" jdbcType="VARCHAR" property="cx" />
    
    <result column="addtime" jdbcType="VARCHAR" property="addtime" />
  </resultMap>
  <sql id="Base_Column_List">
    id, username,pwd,cx, addtime
  </sql>
  
   <select id="allusersLogin"  parameterType="java.util.Map" resultMap="BaseResultMap" >
    select 
    <include refid="Base_Column_List" />
    from allusers
    where username = #{username,jdbcType=VARCHAR} and pwd=#{pwd,jdbcType=VARCHAR} 
  </select>
  
  <select id="quchongAllusers"  parameterType="java.util.Map" resultMap="BaseResultMap" >
    select 
    <include refid="Base_Column_List" />
    from allusers 
    where username = #{username,jdbcType=VARCHAR} 
  </select>
 <select id="getCount"   resultType="int" parameterType="java.util.Map" >
    select  count(*) from allusers  where 1=1
    <if test="username!=null">
    and username =#{username} 
    </if>
  </select> 
  <select id="getAll"   resultMap="BaseResultMap" parameterType="java.util.Map" >
    select   <include refid="Base_Column_List" /> from allusers  where 1=1
    <if test="username!=null">
    and username =#{username}
    </if>
  </select>
  
   <select id="getByPage" parameterType="java.util.Map" resultMap="BaseResultMap">
     select  <include refid="Base_Column_List" /> 
     from allusers where 1=1 
     <if test="username!=null">and username like  concat('%',#{username,jdbcType=VARCHAR},'%')</if>
     <if test="pwd!=null">and pwd like  concat('%',#{pwd,jdbcType=VARCHAR},'%')</if>
     <if test="cx!=null">and cx like  concat('%',#{cx,jdbcType=VARCHAR},'%')</if>
     
     <if test="pageno!=null and pageSize!=null">
     limit #{pageno},#{pageSize}
     </if>
     </select>
	 
  <select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from allusers
    where id = #{id,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">