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mybatis sql动态语句

2016-08-11 00:00 399 查看

if 将实体类不为空的属性作为where条件

<select id="getStudentList_if" resultMap="resultMap_studentEntity" parameterType="liming.student.manager.data.model.StudentEntity">
SELECT ST.STUDENT_ID,
ST.STUDENT_NAME,
ST.STUDENT_SEX,
ST.STUDENT_BIRTHDAY,
ST.STUDENT_PHOTO,
ST.CLASS_ID,
ST.PLACE_ID
FROM STUDENT_TBL ST
WHERE
<if test="studentName !=null ">
ST.STUDENT_NAME LIKE CONCAT(CONCAT('%', #{studentName, jdbcType=VARCHAR}),'%')
</if>
<if test="studentSex != null and studentSex != '' ">
AND ST.STUDENT_SEX = #{studentSex, jdbcType=INTEGER}
</if>
<if test="studentBirthday != null ">
AND ST.STUDENT_BIRTHDAY = #{studentBirthday, jdbcType=DATE}
</if>
<if test="classId != null and classId!= '' ">
AND ST.CLASS_ID = #{classId, jdbcType=VARCHAR}
</if>
<if test="classEntity != null and classEntity.classId !=null and classEntity.classId !=' ' ">
AND ST.CLASS_ID = #{classEntity.classId, jdbcType=VARCHAR}
</if>
<if test="placeId != null and placeId != '' ">
AND ST.PLACE_ID = #{placeId, jdbcType=VARCHAR}
</if>
<if test="placeEntity != null and placeEntity.placeId != null and placeEntity.placeId != '' ">
AND ST.PLACE_ID = #{placeEntity.placeId, jdbcType=VARCHAR}
</if>
<if test="studentId != null and studentId != '' ">
AND ST.STUDENT_ID = #{studentId, jdbcType=VARCHAR}
</if>
</select>

where/if 将实体类不为空的属性作为where条件

<select id="getStudentList_whereIf" resultMap="resultMap_studentEntity" parameterType="liming.student.manager.data.model.StudentEntity">
SELECT ST.STUDENT_ID,
ST.STUDENT_NAME,
ST.STUDENT_SEX,
ST.STUDENT_BIRTHDAY,
ST.STUDENT_PHOTO,
ST.CLASS_ID,
ST.PLACE_ID
FROM STUDENT_TBL ST
<where>
<if test="studentName !=null ">
ST.STUDENT_NAME LIKE CONCAT(CONCAT('%', #{studentName, jdbcType=VARCHAR}),'%')
</if>
<if test="studentSex != null and studentSex != '' ">
AND ST.STUDENT_SEX = #{studentSex, jdbcType=INTEGER}
</if>
<if test="studentBirthday != null ">
AND ST.STUDENT_BIRTHDAY = #{studentBirthday, jdbcType=DATE}
</if>
<if test="classId != null and classId!= '' ">
AND ST.CLASS_ID = #{classId, jdbcType=VARCHAR}
</if>
<if test="classEntity != null and classEntity.classId !=null and classEntity.classId !=' ' ">
AND ST.CLASS_ID = #{classEntity.classId, jdbcType=VARCHAR}
</if>
<if test="placeId != null and placeId != '' ">
AND ST.PLACE_ID = #{placeId, jdbcType=VARCHAR}
</if>
<if test="placeEntity != null and placeEntity.placeId != null and placeEntity.placeId != '' ">
AND ST.PLACE_ID = #{placeEntity.placeId, jdbcType=VARCHAR}
</if>
<if test="studentId != null and studentId != '' ">
AND ST.STUDENT_ID = #{studentId, jdbcType=VARCHAR}
</if>
</where>
</select>

if/set 将实体类不为空的属性更新

<update id="updateStudent_if_set" parameterType="liming.student.manager.data.model.StudentEntity">
UPDATE STUDENT_TBL
<set>
<if test="studentName != null and studentName != '' ">
STUDENT_TBL.STUDENT_NAME = #{studentName},
</if>
<if test="studentSex != null and studentSex != '' ">
STUDENT_TBL.STUDENT_SEX = #{studentSex},
</if>
<if test="studentBirthday != null ">
STUDENT_TBL.STUDENT_BIRTHDAY = #{studentBirthday},
</if>
<if test="studentPhoto != null ">
STUDENT_TBL.STUDENT_PHOTO = #{studentPhoto, javaType=byte[], jdbcType=BLOB, typeHandler=org.apache.ibatis.type.BlobTypeHandler},
</if>
<if test="classId != '' ">
STUDENT_TBL.CLASS_ID = #{classId}
</if>
<if test="placeId != '' ">
STUDENT_TBL.PLACE_ID = #{placeId}
</if>
</set>
WHERE STUDENT_TBL.STUDENT_ID = #{studentId};
</update>

if/trim代替where(判断参数) - 将实体类不为空的属性作为where条件

<select id="getStudentList_if_trim" resultMap="resultMap_studentEntity">
SELECT ST.STUDENT_ID,
ST.STUDENT_NAME,
ST.STUDENT_SEX,
ST.STUDENT_BIRTHDAY,
ST.STUDENT_PHOTO,
ST.CLASS_ID,
ST.PLACE_ID
FROM STUDENT_TBL ST
<trim prefix="WHERE" prefixOverrides="AND|OR">
<if test="studentName !=null ">
ST.STUDENT_NAME LIKE CONCAT(CONCAT('%', #{studentName, jdbcType=VARCHAR}),'%')
</if>
<if test="studentSex != null and studentSex != '' ">
AND ST.STUDENT_SEX = #{studentSex, jdbcType=INTEGER}
</if>
<if test="studentBirthday != null ">
AND ST.STUDENT_BIRTHDAY = #{studentBirthday, jdbcType=DATE}
</if>
<if test="classId != null and classId!= '' ">
AND ST.CLASS_ID = #{classId, jdbcType=VARCHAR}
</if>
<if test="classEntity != null and classEntity.classId !=null and classEntity.classId !=' ' ">
AND ST.CLASS_ID = #{classEntity.classId, jdbcType=VARCHAR}
</if>
<if test="placeId != null and placeId != '' ">
AND ST.PLACE_ID = #{placeId, jdbcType=VARCHAR}
</if>
<if test="placeEntity != null and placeEntity.placeId != null and placeEntity.placeId != '' ">
AND ST.PLACE_ID = #{placeEntity.placeId, jdbcType=VARCHAR}
</if>
<if test="studentId != null and studentId != '' ">
AND ST.STUDENT_ID = #{studentId, jdbcType=VARCHAR}
</if>
</trim>
</select>

if/trim代替set(判断参数) - 将实体类不为空的属性作为where条件

<update id="updateStudent_if_trim" parameterType="liming.student.manager.data.model.StudentEntity">
UPDATE STUDENT_TBL
<trim prefix="SET" suffixOverrides=",">
<if test="studentName != null and studentName != '' ">
STUDENT_TBL.STUDENT_NAME = #{studentName},
</if>
<if test="studentSex != null and studentSex != '' ">
STUDENT_TBL.STUDENT_SEX = #{studentSex},
</if>
<if test="studentBirthday != null ">
STUDENT_TBL.STUDENT_BIRTHDAY = #{studentBirthday},
</if>
<if test="studentPhoto != null ">
STUDENT_TBL.STUDENT_PHOTO = #{studentPhoto, javaType=byte[], jdbcType=BLOB, typeHandler=org.apache.ibatis.type.BlobTypeHandler},
</if>
<if test="classId != '' ">
STUDENT_TBL.CLASS_ID = #{classId},
</if>
<if test="placeId != '' ">
STUDENT_TBL.PLACE_ID = #{placeId}
</if>
</trim>
WHERE STUDENT_TBL.STUDENT_ID = #{studentId}
</update>

choose(判断参数) - 按顺序将实体类第一个不为空的属性作为where条件

<select id="getStudentList_choose" resultMap="resultMap_studentEntity" parameterType="liming.student.manager.data.model.StudentEntity">
SELECT ST.STUDENT_ID,
ST.STUDENT_NAME,
ST.STUDENT_SEX,
ST.STUDENT_BIRTHDAY,
ST.STUDENT_PHOTO,
ST.CLASS_ID,
ST.PLACE_ID
FROM STUDENT_TBL ST
<where>
<choose>
<when test="studentName !=null ">
ST.STUDENT_NAME LIKE CONCAT(CONCAT('%', #{studentName, jdbcType=VARCHAR}),'%')
</when >
<when test="studentSex != null and studentSex != '' ">
AND ST.STUDENT_SEX = #{studentSex, jdbcType=INTEGER}
</when >
<when test="studentBirthday != null ">
AND ST.STUDENT_BIRTHDAY = #{studentBirthday, jdbcType=DATE}
</when >
<when test="classId != null and classId!= '' ">
AND ST.CLASS_ID = #{classId, jdbcType=VARCHAR}
</when >
<when test="classEntity != null and classEntity.classId !=null and classEntity.classId !=' ' ">
AND ST.CLASS_ID = #{classEntity.classId, jdbcType=VARCHAR}
</when >
<when test="placeId != null and placeId != '' ">
AND ST.PLACE_ID = #{placeId, jdbcType=VARCHAR}
</when >
<when test="placeEntity != null and placeEntity.placeId != null and placeEntity.placeId != '' ">
AND ST.PLACE_ID = #{placeEntity.placeId, jdbcType=VARCHAR}
</when >
<when test="studentId != null and studentId != '' ">
AND ST.STUDENT_ID = #{studentId, jdbcType=VARCHAR}
</when >
<otherwise>
</otherwise>
</choose>
</where>
</select>

foreach(循环array参数) - 作为where中in的条件

<select id="getStudentListByClassIds_foreach_array" resultMap="resultMap_studentEntity">
SELECT ST.STUDENT_ID,
ST.STUDENT_NAME,
ST.STUDENT_SEX,
ST.STUDENT_BIRTHDAY,
ST.STUDENT_PHOTO,
ST.CLASS_ID,
ST.PLACE_ID
FROM STUDENT_TBL ST
WHERE ST.CLASS_ID IN
<foreach collection="array" item="classIds"  open="(" separator="," close=")">
#{classIds}
</foreach>
</select>

foreach(循环List<String>参数) - 作为where中in的条件

<select id="getStudentListByClassIds_foreach_list" resultMap="resultMap_studentEntity">
SELECT ST.STUDENT_ID,
ST.STUDENT_NAME,
ST.STUDENT_SEX,
ST.STUDENT_BIRTHDAY,
ST.STUDENT_PHOTO,
ST.CLASS_ID,
ST.PLACE_ID
FROM STUDENT_TBL ST
WHERE ST.CLASS_ID IN
<foreach collection="list" item="classIdList"  open="(" separator="," close=")">
#{classIdList}
</foreach>
</select>

foreach(循环Map<String,String>参数) - 作为where中in的条件

<if test="sorts != null and sorts.size() != 0">
order by
<foreach collection="sorts" separator="," index="key" item="val">
${key} ${val}
</foreach>
</if>

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