public class UserDO {
private Long id;
private String userName;
private Date gmtCreate;
private Date gmtModified;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public Date getGmtCreate() {
return gmtCreate;
}
public void setGmtCreate(Date gmtCreate) {
this.gmtCreate = gmtCreate;
}
public Date getGmtModified() {
return gmtModified;
}
public void setGmtModified(Date gmtModified) {
this.gmtModified = gmtModified;
}
}

public interface UserDAO {
@Insert("INSERT INTO t_user(gmt_create, gmt_modified, user_name) values(now(), now(), #{userName})")
public int insert(@Param("userName") String userName);
　 @Select("SELECT * FROM t_user WHERE id = #{id}")
public UserDO selectByUserId(@Param("id") Long id) ;
@Update("UPDATE t_user SET gmt_modified = now(), user_name = #{userName} WHERE id = #{id}")
public int udpateById(@Param("userName") String userName, @Param("id") Long id) ;
@Delete("DELETE FROM t_user WHERE id = #{id}")
public int udpateById(@Param("id") Long id) ;　　
}

<!-- mybatis 注解 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="mysqlBASE" /> <!--这里只需要配置你自己的数据源即可-->
</bean> 
　　<bean id="userDAO" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="com.yuanmeng.userDAO" /> <!--mybatis接口-->
　　　　 <property name="sqlSessionFactory" ref="sqlSessionFactory" /> <!--sqlSession工厂-->
　　</bean>

@Select("SELECT * FROM tsp_template WHERE id = #{id}")
@Results(value = { @Result(property = "userName", column = "user_name", javaType = String.class, jdbcType = JdbcType.VARCHAR) }) 
public UserDO selectById(@Param("id") Long id);

@UpdateProvider(type = UserProvider.class, method = "updateSQL")

public class UserProvider {
/**
* udpate
* @param UserDO userDO
* @return
*/
public String updateSQL(final UserDO userDO) {
return new SQL() {
{
UPDATE("t_user");
SET("gmt_modified = now()");
if (userDO.getUserName() != null) {
SET("user_name = #{userName}");
}
WHERE("id = #{id}}");
}
}.toString();
}
}