public class MyDemoTypeHandler extends BaseTypeHandler<String> {@Overridepublic void setNonNullParameter(PreparedStatement ps, int i, String parameter, JdbcType jdbcType)throws SQLException {String ssex=(String)parameter;if("男".equals(ssex)){ps.setInt(i, 0);}else if("女".equals(ssex)){ps.setInt(i, 1);}else{ps.setInt(i, 2);}}@Overridepublic String getNullableResult(ResultSet rs, String columnName) throws SQLException {int ssex=rs.getInt(columnName);if(ssex==0){return "男";}else if(ssex==1){return "女";}else{return "not know";}}@Overridepublic String getNullableResult(ResultSet rs, int columnIndex) throws SQLException {int ssex=rs.getInt(columnIndex);if(ssex==0){return "男";}else if(ssex==1){return "女";}else{return "not know";}}@Overridepublic String getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {int ssex=cs.getInt(columnIndex);if(ssex==0){return "男";}else if(ssex==1){return "女";}else{return "not know";}}}

1 <!-- mybatis-config.xml -->
2 <typeHandlers>
3         <typeHandler handler="cn.cgq.demo.mybatis.typeHandler.MyDemoTypeHandler" javaType="String" jdbcType="INTEGER"/>
4     </typeHandlers>

1 <resultMap id="StudentResult" type="Student">
2        <id column="sid" property="sid"/>
3        <result column="sname" property="sname"/>
4        <result column="ssex" property="ssex" javaType="String" jdbcType="INTEGER"/>
5        <result column="saddress" property="saddress"/>
6     </resultMap>
7 <select id="selectStudentBySsex" parameterType="String" resultType="Student">
8         select * from Student where ssex=#{ssex,javaType=String,jdbcType=INTEGER}
9     </select>

1 Student student = session.selectOne("cn.cgq.demo.mybatis.mapper.StudentMapper.selectStudentBySsex", "女");
2                 System.out.println(student.toString());