<select id="selectTeacher" parameterType="int" resultType="com.myapp.domain.Teacher"> 
  select * from Teacher where c_id=#{id} 
</select> 

List<Teacher> tList = teacherMapper.selectTeacher(2);  
for (Teacher entityTemp : tList) {  
  System.out.println(entityTemp.toString());  
}  

<select id="selectTeacher" parameterType="com.myapp.domain.Teacher" resultType="com.myapp.domain.Teacher"> 
  select * from Teacher where c_id=#{id} 
</select> 

Teacher queryTeacher=new Teacher(); 
queryTeacher.setId(2); 
List<Teacher> tList = teacherMapper.selectTeacher(queryTeacher);  
for (Teacher entityTemp : tList) {  
  System.out.println(entityTemp.toString()); } 

<select id="selectTeacher" parameterType="Map" resultType="com.myapp.domain.Teacher"> 
  select * from Teacher where c_id=#{id} and sex=#{sex} 
</select> 

Map<String,String> map=new HasMap<String,String>(); 
map.put("id","2"); 
map.put("sex","男"); 
List<Teacher> tList = teacherMapper.selectTeacher(map);  
for (Teacher entityTemp : tList) {  
  System.out.println(entityTemp.toString()); } 

public List<Teacher> selectTeacher(@Param(value="id") String id,@Param(value="sex") String sex); 

<select id="selectTeacher" resultType="com.myapp.domain.Teacher"> 
  select * from Teacher where c_id=#{id} and sex=#{sex} 
</select> 

List<Teacher> tList = teacherMapper.selectTeacher("2","男");  
for (Teacher entityTemp : tList) {  
  System.out.println(entityTemp.toString());  

 void updateContactsIsRead(List<Integer> logidList);

<update id="updateContactsIsRead">
   update emaillog2 set isRead = 1 where isRead = 0 and logid in
   <foreach collection="list" item="logid" index="index" open="(" close=")" separator=",">
  #{logid,jdbcType=INTEGER}
  </foreach>
 </update>