参考博客：http://www.cnblogs.com/magialmoon/archive/2013/10/30/3397828.html
整体结构
POM依赖
<dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.2.3</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.26</version> </dependency>
数据准备
CREATE TABLE `t_migu_top_data` (
`music_id` int(11) DEFAULT NULL,
`music_name` varchar(100) DEFAULT NULL,
`music_author` varchar(100) DEFAULT NULL,
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
配置文件
mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<!-- changes from the defaults for testing -->
<setting name="cacheEnabled" value="false" />
<setting name="useGeneratedKeys" value="true" />
<setting name="defaultExecutorType" value="REUSE" />
</settings>
<typeAliases>
<typeAlias alias="TopData" type="com.cmcc.top.mysql.entity.TopData"></typeAlias>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"></transactionManager>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://172.23.28.57:3306/top?useUnicode=true&characterEncoding=UTF-8" />
<property name="username" value="root" />
<property name="password" value="*****" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="sqlMap/TopDataMapper.xml"/>
</mappers>
</configuration>
TopDataMapper.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="com.cmcc.top.mysql.dao.TopDataDao">
<sql id="tablename">t_migu_top_data</sql>
<sql id="Base_Column_List">
music_id,
music_name,
music_author
</sql>
<resultMap id="BaseResultMap" type="com.cmcc.top.mysql.entity.TopData">
<result column="music_id" property="musicId" jdbcType="VARCHAR" />
<result column="music_name" property="musicName" jdbcType="VARCHAR" />
<result column="music_author" property="musicAuthor" jdbcType="VARCHAR" />
</resultMap>
<insert id="createTopData" useGeneratedKeys="true" keyProperty="id" parameterType="com.cmcc.top.mysql.entity.TopData" >
insert into <include refid="tablename" />
(
music_id,
music_name,
music_author
)
values
(
#{musicId},
#{musicName},
#{musicAuthor}
)
</insert>
<insert id="createTopDataByBatch" parameterType="java.util.List" >
insert into <include refid="tablename" />
(
music_id,
music_name,
music_author
)
values
<foreach collection="list" item="item" index="index" separator="," >
(
#{item.musicId},
#{item.musicName},
#{item.musicAuthor}
)
</foreach>
</insert>
<select id="getTopDataList" parameterType="java.util.Map" resultMap="BaseResultMap" >
select <include refid="Base_Column_List" />
from
<include refid="tablename" />
<where>
<if test="musicId !=null " >
and music_id = #{musicId}
</if>
<if test="musicName != null">
and music_name like ‘%${musicName}%‘
</if>
<if test="musicAuthor != null">
and music_author like ‘%${musicAuthor}%‘
</if>
<if test="musicLanguage != null">
and music_language = #{musicLanguage}
</if>
<if test="musicStyle != null">
and music_style = #{musicStyle}
</if>
<if test="startDate != null">
and create_time >= ‘${startDate}‘
</if>
<if test="endDate != null">
and ‘${endDate}‘ >= create_time
</if>
</where>
</select>
<update id="updateTopData" parameterType="com.cmcc.top.mysql.entity.TopData" >
update <include refid="tablename" />
<set>
<if test="musicStatus != null">
music_status = #{musicStatus},
</if>
<if test="customerFilePath != null">
customer_file_path = #{customerFilePath},
</if>
</set>
where music_id = #{musicId}
</update>
</mapper>
实体对象
public class TopData {
private String musicId;
private String musicName;
private String musicAuthor;
...
}
接口Dao
public interface TopDataDao {
public void createTopData(TopData topData);
public void createTopDataByBatch(List<TopData> topDataList);
public void updateTopData(TopData topData);
//public void updateTopDataByBatch(List<TopData> topDataList);
public List<TopData> getTopDataList(Map<String, Object> queryMap);
}
manager
public class TopDataManager {
private static SqlSession sqlSession;
private static TopDataDao topDataDao;
public static void initialConnection() {
try{
String resource = "mybatis-config.xml";
Reader reader = Resources.getResourceAsReader(resource);
SqlSessionFactory ssf = new SqlSessionFactoryBuilder().build(reader);
sqlSession = ssf.openSession();
topDataDao = sqlSession.getMapper(TopDataDao.class);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void destroyConnection() {
sqlSession.close();
}
public static void createTopData(TopData topData) {
topDataDao.createTopData(topData);
sqlSession.commit();
}
public static void createTopDataByBatch(List<TopData> topDataList) {
topDataDao.createTopDataByBatch(topDataList);
sqlSession.commit();
}
public static void updateTopData(TopData topData) {
topDataDao.updateTopData(topData);
sqlSession.commit();
}
public static List<TopData> getTopDataList(Map<String, Object> queryMap) {
return topDataDao.getTopDataList(queryMap);
}
}
测试
main 方法访问即可
注意事项
1、mybatis会用log4j记录日志，但是开启debug模式貌似对性能影响非常厉害。
2、mybatis的查询缓存对性能的影响非常大，启用和不启用差距非常大
注意：mapper文件中一定要加上cache这一行，否则不生效。
时间： 2024-11-10 14:13:25