Mybatis之Oracle增删查改示例（含Date、Clob数据类型操作）

oracle表结构

create table T_USERS(  ID      NUMBER not null,  NAME    VARCHAR2(30),  SEX     VARCHAR2(3),  BIRS    DATE,  MESSAGE CLOB)create sequence SEQ_T_USERS_IDminvalue 1maxvalue 99999999start with 1increment by 1cache 20;

配置mybatis配置文件UsersMapper.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapper  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"  "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="examples.mapper.UsersMapper" ><!-- Result Map--><resultMap type="examples.bean.Users" id="BaseResultMap"><result property="id" column="id" /><result property="name" column="name" /><result property="sex" column="sex" /><result property="birs" column="birs" jdbcType="TIMESTAMP"/><result property="message" column="message" jdbcType="CLOB" javaType = "java.lang.String"  typeHandler ="examples.service.OracleClobTypeHandler"/></resultMap><sql id="Tabel_Name">t_users</sql><!-- 表中所有列 --><sql id="Base_Column_List" >id,name,sex,birs,message</sql><!-- 查询条件 --><sql id="Example_Where_Clause">where 1=1<trim suffixOverrides=","><if test="id != null">and id = #{id}</if><if test="name != null and name != ''">and name like concat(concat('%', '${name}'), '%')</if><if test="sex != null and sex != ''">and sex like concat(concat('%', '${sex}'), '%')</if><if test="birs != null">and birs = #{birs}</if><if test="message != null">and message = #{message}</if></trim></sql><!-- 1.新增记录 --><insert id="add" parameterType="Object" > <selectKey resultType="int" order="BEFORE" keyProperty="id">select seq_t_users_id.nextval as id from dual</selectKey>insert into t_users(id,name,sex,birs,message) values(#{id},#{name},#{sex},#{birs},#{message,jdbcType=CLOB})</insert><!-- 2.根据id修改记录-->  <update id="update" parameterType="Object" >update t_users set name=#{name},sex=#{sex},birs=#{birs},message=#{message} where id=#{id}</update><!-- 3.只修改不为空的字段 --><update id="updateBySelective" parameterType="Object" >update t_users set <trim  suffixOverrides="," ><if test="name != null  and name != '' ">name=#{name},</if><if test="sex != null  and sex != '' ">sex=#{sex},</if><if test="birs != null  ">birs=#{birs},</if><if test="message != null  and message != '' ">message=#{message},</if></trim> where id=#{id}</update><!-- 4.根据id进行删除 --><delete id="delete" parameterType="Object">delete from t_users where id = #{id}</delete><!-- 5.根据id查询 --><select id="queryById" resultMap="BaseResultMap" parameterType="Object">select<include refid="Base_Column_List" />from t_users where id = #{id}</select><!-- 6.查询列表，只查询不为空的字段 --><select id="queryBySelective" resultMap="BaseResultMap" parameterType="Object">select<include refid="Base_Column_List" />from t_users<include refid="Example_Where_Clause" /></select><!-- 7.列表总数 --><select id="queryByCount" resultType="java.lang.Integer" parameterType="Object">select count(1) from t_users<include refid="Example_Where_Clause" /></select><!-- 8.查询列表 --><select id="queryByList" resultMap="BaseResultMap" parameterType="Object">select<include refid="Base_Column_List" />from t_users <include refid="Example_Where_Clause"/></select></mapper>   

Mapper类接口

package examples.mapper;import java.util.List;public interface UsersMapper<T> {public void add(T t);public void update(T t);public void updateBySelective(T t);public void delete(Object id);public T queryById(Object id);public List<T> queryBySelective(T t);public int queryByCount(T t);public List<T> queryByList(T t);}

类型转换工具类

package examples.service;import java.sql.CallableStatement;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import oracle.sql.CLOB;import org.apache.ibatis.type.JdbcType;import org.apache.ibatis.type.TypeHandler;public class OracleClobTypeHandler implements TypeHandler<Object> {public Object valueOf(String param) {return null;}@Overridepublic Object getResult(ResultSet arg0, String arg1) throws SQLException {CLOB clob = (CLOB) arg0.getClob(arg1);return (clob == null || clob.length() == 0) ? null : clob.getSubString((long) 1, (int) clob.length());}@Overridepublic Object getResult(ResultSet arg0, int arg1) throws SQLException {return null;}@Overridepublic Object getResult(CallableStatement arg0, int arg1) throws SQLException {return null;}@Overridepublic void setParameter(PreparedStatement arg0, int arg1, Object arg2, JdbcType arg3) throws SQLException {CLOB clob = CLOB.empty_lob();clob.setString(1, (String) arg2);arg0.setClob(arg1, clob);}}

Spring配置文件

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsdhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"default-autowire="byType"><!-- 配置数据源 --><bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">         <property name="driverClassName"><value>oracle.jdbc.driver.OracleDriver</value></property>          <property name="url"><value>jdbc:oracle:thin:@127.0.0.1:1521:pms</value></property>          <property name="username"><value>pms</value></property>          <property name="password"><value>pms</value></property></bean><!-- 配完数据源 和 拥有的 sql映射文件 sqlSessionFactory 也可以访问数据库 和拥有 sql操作能力了 --><!-- <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource" />  <property name="configLocation" value="classpath:mybatis-config.xml"/></bean> --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><property name="dataSource" ref="dataSource" /><property name="mapperLocations"><list><value>classpath:examples/mybatis/oracle/UsersMapper.xml</value></list></property></bean><!-- 通过设置 mapperInterface属性，使接口服务bean 和对应xml文件管理 可以使用其中的sql --><bean id="dao" class="org.mybatis.spring.mapper.MapperFactoryBean"><!-- 此处等同于 Mybatis 中 ServerDao serverDao = sqlSession.getMapper(ServerDao.class); 指明映射关系 --><property name="mapperInterface" value="examples.mapper.UsersMapper" /><property name="sqlSessionFactory" ref="sqlSessionFactory" /></bean></beans>

测试类

package examples.service;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.List;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import examples.bean.Users;import examples.mapper.UsersMapper;public class TestUsersService {@SuppressWarnings("unchecked")public static void main(String[] args) throws ParseException {ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:/examples/service/spring.xml");UsersMapper<Users> dao = (UsersMapper<Users>)ac.getBean("dao");//删除表中所有信息Users nullBean = new Users();List<Users> delList = dao.queryByList(nullBean);if(delList != null) {for(Users user : delList) {dao.delete(user.getId());}}//新增Users bean = new Users();bean.setName("ding");bean.setSex("男");bean.setBirs(new SimpleDateFormat("yyyy-MM-dd").parse("1985-01-01"));bean.setMessage("This is Clob!");dao.add(bean);List<Users> list = dao.queryByList(nullBean);if(list != null) {for(Users user : list) {System.out.println(user);}}//查询并更新bean = new Users();bean.setName("ding");List<Users> queList = dao.queryByList(bean);if(queList != null) {for(Users user : list) {user.setSex("女");dao.updateBySelective(user);}}list = dao.queryByList(nullBean);if(list != null) {for(Users user : list) {System.out.println(user);}}//查询并更新bean = new Users();bean.setName("ding");List<Users> queList2 = dao.queryByList(bean);if(queList != null) {for(Users user : queList2) {user.setSex("男");user.setMessage("");dao.update(user);}}list = dao.queryByList(nullBean);if(list != null) {for(Users user : list) {System.out.println(user);}}int num = dao.queryByCount(nullBean);System.out.println("num=" + num);}}