Mybatis
1. New
Mapper
<insert id="insert" keyProperty="id" parameterType="org.zsf.entity.UserBase">
insert into userbase (id, userName, password,nickName, email,role)
values (
#{id,jdbcType=BIGINT},
#{userName,jdbcType=VARCHAR},
#{password,jdbcType=VARCHAR},
#{nickName,jdbcType=VARCHAR},
#{email,jdbcType=VARCHAR},
#{role,jdbcType=INTEGER}
)
</insert>
Dao:Long insert(UserBase record);
2. Delete
Mapper
<delete id="deleteByPrimaryKey" parameterType="java.lang.Long">
delete from userbase
where id = #{id,jdbcType=BIGINT}
</delete>
Dao
int deleteByPrimaryKey(Long id);
3. The query returns a single piece of data
Mapper
<resultMap id="BaseResultMap" type="org.zsf.entity.UserBase">
<id column="id" jdbcType="BIGINT" property="id" />
<result column="userName" jdbcType="VARCHAR" property="userName" />
<result column="password" jdbcType="VARCHAR" property="password" />
<result column="nickName" jdbcType="VARCHAR" property="nickName" />
<result column="email" jdbcType="VARCHAR" property="email" />
<result column="role" jdbcType="INTEGER" property="role" />
</resultMap>
<select id="selectByPrimaryKey" parameterType="java.lang.Long" resultMap="BaseResultMap">
select
<include refid="Base_Column_List" />
from userbase
where id = #{id,jdbcType=BIGINT}
</select>
Dao:
UserBase selectByPrimaryKey(Long id);
返回列表
Mapper
<sql id="Base_Column_List">
id, userName, password,nickName,role,email
</sql>
<select id="getUsersByType" parameterType="java.lang.Integer" resultMap="BaseResultMap">
select
<include refid="Base_Column_List" />
from userbase
where role = #{role,jdbcType=INTEGER}
</select>
Dao: List<UserBase> getUsersByType(int type);
4、更新
Mapper
<update id="updateByPrimaryKey" parameterType="org.zsf.entity.UserBase">
update userbase
set userName = #{userName,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR},
nickName = #{nickName,jdbcType=VARCHAR},
email = #{email,jdbcType=VARCHAR},
role = #{role,jdbcType=INTEGER},
where id = #{id,jdbcType=BIGINT}
</update>
Dao:
int updateByPrimaryKey(UserBase record);
MyBatis 多参数
方法1
Mapper:
<select id="getUserStudentListByType" resultType="org.zsf.entity.UserStudent">
select ub.id, ub.userName as userName, ub.role,ub.email,us.gender,us.age,us.address,ub.nickName
from userbase ub left join user_student us on ub.id = us.userId
where ub.role=#{type} and ub.type2 = #{type2}
</select>
Dao:
List<UserStudent> getUserStudentListByType(@Param("type")int type，@Param("type2")int type2);
方法2
Mapper
<select id="getUserStudentListByType" resultType="org.zsf.entity.UserStudent">
select ub.id, ub.userName as userName, ub.role,ub.email,us.gender,us.age,us.address,ub.nickName
from userbase ub left join user_student us on ub.id = us.userId
where ub.role=#{0} and ub.type2=#{1}
</select>
Dao
List<UserStudent> getUserStudentListByType(int type,int type2);