set标签
1、自动加上 set
2、自动剔除最后一个逗号","
mapping
<select id="searchStudents5" parameterType="Map" resultMap="StudentResult">
select * from t_student
<if test="gradeIds!=null">
<where>
gradeId in
<foreach item="gradeId" collection="gradeIds" open="(" separator="," close=")">
#{gradeId}
</foreach>
</where>
</if>
</select>
<update id="updateStudent" parameterType="Student">
update t_student
<set>
<if test="name!=null">
name=#{name},
</if>
<if test="age!=null">
age=#{age},
</if>
</set>
where id=#{id}
</update>
调用测试
@Test
public void testSearchStudents5() {
logger.info("添加学生(带条件)");
Map<String,Object> map=new HashMap<String,Object>();
List<Integer> gradeIds=new ArrayList<Integer>();
// gradeIds.add(1);
gradeIds.add(2);
map.put("gradeIds", gradeIds);
List<Student> studentList=studentMapper.searchStudents5(map);
for(Student student:studentList){
System.out.println(student);
}
}
@Test
public void testUpdateStudent(){
logger.info("更新学生(带条件)");
Student student=new Student();
student.setId(1);
student.setName("张三3");
student.setAge(13);
studentMapper.updateStudent(student);
sqlSession.commit();
}