MyBatis传入多个参数时parameterType的写法

public Student(Integer SID, String sname, String ssex, Integer sage) {
        this.SID = SID;
        Sname = sname;
        Ssex = ssex;
        Sage = sage;
    }

public  int insertStudent(Student student);

 <insert id="insertStudent"  parameterType="com.tulun.maventest.pojo.Student" >
        insert into  student(SID, Sname, Sage, Ssex)  values (#{SID}, #{Sname}  ,#{Sage}, #{Ssex} )
    </insert>

StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);
 Student student=new Student(10,"小明","男",24);
 System.out.println(mapper.insertStudent(student));
 sqlSession.commit();//事务

 <update id="updateSnameById"  parameterType="Map" >
        update Student set sname = #{sname} where sid = #{sid}
    </update>

public int updateSnameById(Map map);

Map<String,String> map=new HashMap<String,String>();
                map.put("sid","4");
                map.put("sname","刘能");
                System.out.println(mapper.updateSnameById(map));  
                sqlSession.commit();//

public int updateSnameById(@Param(value="sid")Integer sid,@Param(value="sname") String sname);

<update id="updateSnameById"  parameterType="com.tulun.maventest.pojo.Student" >
        update Student set sname = #{sname} where sid = #{sid}
    </update>

System.out.println(mapper.updateSnameById(4, "刘心晶"));
sqlSession.commit();//事务

Map<String, Object> params = new HashMap<>();
List<Long> ids = new ArrayList<>();
Long donwCnt = 20L;
params.put("ids", ids);
params.put("downCnt", donwCnt);
boolean result = userMapper.batchUpdateByIds(params);

boolean batchUpdateByIds(Map<String, Object> params) throws Exception;

<update id="batchUpdateByIds"  parameterType="java.util.Map" >
    update user
    <set>
        down_cnt = #{downCnt}
        where id in
        <foreach collection="ids" index="index" item="item" open="(" separator="," close=")" >
            #{item}
        </foreach>
    </set>
</update>