mybatis与Spring集成(Aop整合PagerAspect插件)
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目的:
Mybatis与spring集成
导入pom依赖
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <parent> <artifactId>module</artifactId> <groupId>com.huangting</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <packaging>war</packaging> <name>ssm</name> <artifactId>ssm</artifactId> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version> <!--添加jar包依赖--> <!--1.spring 5.0.2.RELEASE相关--> <spring.version>5.0.2.RELEASE</spring.version> <!--2.mybatis相关--> <mybatis.version>3.4.5</mybatis.version> <!--mysql--> <mysql.version>5.1.44</mysql.version> <!--pagehelper分页jar依赖--> <pagehelper.version>5.1.2</pagehelper.version> <!--mybatis与spring集成jar依赖--> <mybatis.spring.version>1.3.1</mybatis.spring.version> <!--3.dbcp2连接池相关 druid--> <commons.dbcp2.version>2.1.1</commons.dbcp2.version> <commons.pool2.version>2.4.3</commons.pool2.version> <!--4.log日志相关--> <log4j2.version>2.9.1</log4j2.version> <!--5.其他--> <junit.version>4.12</junit.version> <servlet.version>4.0.0</servlet.version> <lombok.version>1.18.2</lombok.version> </properties> <dependencies> <!--1.spring相关--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>$spring.version</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>$spring.version</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>$spring.version</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>$spring.version</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>$spring.version</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>$spring.version</version> </dependency> <!--2.mybatis相关--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>$mybatis.version</version> </dependency> <!--mysql--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>$mysql.version</version> </dependency> <!--pagehelper分页插件jar包依赖--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>$pagehelper.version</version> </dependency> <!--mybatis与spring集成jar包依赖--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>$mybatis.spring.version</version> </dependency> <!--3.dbcp2连接池相关--> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> <version>$commons.dbcp2.version</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> <version>$commons.pool2.version</version> </dependency> <!--4.log日志相关依赖--> <!--核心log4j2jar包--> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>$log4j2.version</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>$log4j2.version</version> </dependency> <!--web工程需要包含log4j-web,非web工程不需要--> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-web</artifactId> <version>$log4j2.version</version> </dependency> <!--5.其他--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>$junit.version</version> <scope>test</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>$servlet.version</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>$lombok.version</version> <scope>provided</scope> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> </dependencies> <build> <finalName>ssm</finalName> <resources> <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题--> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题--> <resource> <directory>src/main/resources</directory> <includes> <include>jdbc.properties</include> <include>*.xml</include> </includes> </resource> </resources> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>$maven.compiler.plugin.version</version> <configuration> <source>$maven.compiler.source</source> <target>$maven.compiler.target</target> <encoding>$project.build.sourceEncoding</encoding> </configuration> </plugin> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.2</version> <dependencies> <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>$mysql.version</version> </dependency> </dependencies> <configuration> <overwrite>true</overwrite> </configuration> </plugin> <plugin> <groupId>org.mortbay.jetty</groupId> <artifactId>maven-jetty-plugin</artifactId> <version>6.1.7</version> <configuration> <connectors> <connector implementation="org.mortbay.jetty.nio.SelectChannelConnector"> <port>8888</port> <maxIdleTime>30000</maxIdleTime> </connector> </connectors> <webAppSourceDirectory>$project.build.directory/$pom.artifactId-$pom.version </webAppSourceDirectory> <contextPath>/</contextPath> </configuration> </plugin> </plugins> </build> </project>
编写配置文件applicationContext-mybatis.xml 和 applicationContext.xml
-
注解释开发
注解驱动
<context:annotation-config/>
用注解方式注入bean,并指定查找范围:com.ht及子子孙孙包
<context:component-scan base-package="com.ht"/>
- 引入外部jdbc配置文件
<context:property-placeholder location="classpath:jdbc.properties"/>
- 配置dbcp2数据库连接池
- spring和mybatis整合
- 注解式事物配置
配置事务管理(环绕通知) 有关数据库操作的开启、提交操作都是在环绕在数据库操作的前后
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <tx:annotation-driven transaction-manager="transactionManager" /> <aop:aspectj-autoproxy/>
- 开启动态代理
<aop:aspectj-autoproxy/>
@Repository:将DAO类声明为Bean
@Service:通常作用在业务层
@Constroller:通常作用在控制层,将在Spring MVC中使用
@Component:是一个泛化的概念,仅仅表示spring中的一个组件(Bean),可以作用在任何层次
@Scope:模式声明(singleton|prototype)
@Autowired:将自动在代码上下文与其匹配(默认是类型匹配)的Bean,并自动注入到相应的地方
@Resource:
1)@Resource后面没有任何内容,默认通过name属性去匹配bean,找不到再按type去匹配
2)指定了name或者type则根据指定的类型去匹配bean
3)指定了name和type则根据指定的name和type去匹配bean,任何一个不匹配都将报错
问题:@Autowired和@Resource两个注解的区别:
1)@Autowired默认按照byType方式进行bean匹配,@Resource默认按照byName方式进行bean匹配
2)@Autowired是Spring的注解,@Resource是J2EE的注解,这个看一下导入注解的时候这两个注解的包名就一清二楚了
Spring属于第三方的,J2EE是Java自己的东西,因此,建议使用@Resource注解,以减少代码和Spring之间的耦合。
@Transactional
注:个人感觉注解式事务比以前的声明式事务更加麻烦,要写的东西更多
applicationContext-Mybatis.xml 这是spring整合mybatis 的配置文件
applicationContext-mybatis.xml
<?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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--1. 注解式开发 -->
<!-- 注解驱动 -->
<context:annotation-config/>
<!-- 用注解方式注入bean,并指定查找范围:com.huangting及子子孙孙包-->
<context:component-scan base-package="com.ht"/>
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="$jdbc.driver"/>
<property name="url" value="$jdbc.url"/>
<property name="username" value="$jdbc.username"/>
<property name="password" value="$jdbc.password"/>
<!--初始连接数-->
<property name="initialSize" value="10"/>
<!--最大活动连接数-->
<property name="maxTotal" value="100"/>
<!--最大空闲连接数-->
<property name="maxIdle" value="50"/>
<!--最小空闲连接数-->
<property name="minIdle" value="10"/>
<!--设置为-1时,如果没有可用连接,连接池会一直无限期等待,直到获取到连接为止。-->
<!--如果设置为N(毫秒),则连接池会等待N毫秒,等待不到,则抛出异常-->
<property name="maxWaitMillis" value="-1"/>
</bean>
<!--4. spring和MyBatis整合 -->
<!--1) 创建sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 指定数据源 -->
<property name="dataSource" ref="dataSource"/>
<!-- 自动扫描XxxMapping.xml文件,**任意路径 -->
<property name="mapperLocations" value="classpath*:com/ht/**/mapper/*.xml"/>
<!-- 指定别名 -->
<property name="typeAliasesPackage" value="com/ht/**/model"/>
<!--配置pagehelper插件-->
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">
<property name="properties">
<value>
helperDialect=mysql
</value>
</property>
</bean>
</array>
</property>
</bean>
<!--2) 自动扫描com/javaxl/ssm/**/mapper下的所有XxxMapper接口(其实就是DAO接口),并实现这些接口,-->
<!-- 即可直接在程序中使用dao接口,不用再获取sqlsession对象-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--basePackage 属性是映射器接口文件的包路径。-->
<!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径-->
<property name="basePackage" value="com/ht/**/mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<aop:aspectj-autoproxy/>
</beans>
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <!--整合mybatis框架--> <import resource="applicationContext-mybatis.xml"></import> </beans>
Spring Test+junit完美组合
我们来测试一下
首先在service层中创建包类
BookService
package com.ht.service; import com.ht.Util.PageBean; import com.ht.model.Book; import java.util.List; import java.util.Map; /** * @author 黄大娘 * @company dogson有限公司 * @create 2019-09-24 20:10 */ public interface BookService int deleteByPrimaryKey(Integer bid); int insert(Book record); int insertSelective(Book record); Book selectByPrimaryKey(Integer bid); int updateByPrimaryKeySelective(Book record); int updateByPrimaryKey(Book record);、
BookServiceipml
package com.ht.service.ipml; import com.ht.Util.PageBean; import com.ht.mapper.BookMapper; import com.ht.model.Book; import com.ht.service.BookService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; import java.util.Map; /** * @author 黄大娘 * @company dogson有限公司 * @create 2019-09-24 22:58 */ @Service public class BookServiceIpml implements BookService @Autowired private BookMapper bookMapper; @Override public int deleteByPrimaryKey(Integer bid) return bookMapper.deleteByPrimaryKey(bid); @Override public int insert(Book record) return bookMapper.insert(record); @Override public int insertSelective(Book record) return bookMapper.insertSelective(record); @Override public Book selectByPrimaryKey(Integer bid) return bookMapper.selectByPrimaryKey(bid); @Override public int updateByPrimaryKeySelective(Book record) return bookMapper.updateByPrimaryKeySelective(record); @Override public int updateByPrimaryKey(Book record) return bookMapper.updateByPrimaryKey(record);
SpringBaseTest
package com.ht.Test; import com.ht.Util.PageBean; import com.ht.model.Book; import org.junit.Before; import org.junit.runner.RunWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; /** * @author 黄大娘 * @company dogson有限公司 * @create 2019-09-24 23:09 */ @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations="classpath:applicationContext.xml") public class SpringBaseTest protected Book book; protected PageBean pageBean; @Before public void init() book = new Book(); pageBean = new PageBean();
测试:
SpringBaseTestipml
package com.ht.service.ipml; import com.ht.Test.SpringBaseTest; import com.ht.service.BookService; import org.junit.Test; import org.springframework.beans.factory.annotation.Autowired; /** * @author 黄大娘 * @company dogson有限公司 * @create 2019-09-25 0:37 */ public class SpringBaseTestipml extends SpringBaseTest @Autowired private BookService bookService; @Test public void insert() book.setBid(8); book.setBname("墙头马上遥相顾"); book.setPrice(45.6); int n = this.bookService.insert(book); System.out.println(n);
效果:
Aop整合pagehelper插件
注意:记得开动态代理
@Around("execution(* *..*Service.*pager(..))") public Object invoke(ProceedingJoinPoint args)
execution(方法修饰符 方法返回值 方法所属类 匹配方法名 ( 方法中的形参表 ) 方法申明抛出的异常 )
"*" :代表一个任意类型的参数;
“..”:代表零个或多个任意类型的参数。
设置方法接口
BookMapper
//用来测试的接口,一个符合规则,一个不符合规则 List<Map> hhhh(Map map);
配置映射BookMapper.xml文件
<select id="hhhh" resultType="java.util.Map" parameterType="java.util.Map"> select * from t_mvc_book <where> <if test="null != bname and bname !=‘‘"> and bname like #bname </if> </where> </select>
BookService
//用来测试的接口,一个符合规则,一个不符合规则 List<Map> hhhh(Map map,PageBean pageBean); List<Map> listPager (Map map, PageBean pageBean);
BookServiceIpml
@Override public List<Map> hhhh(Map map,PageBean pageBean) return this.bookMapper.hhhh(map); @Override public List<Map> listPager(Map map, PageBean pageBean) return this.bookMapper.hhhh(map);
PagerAspect
package com.ht; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.ht.Util.PageBean; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.springframework.stereotype.Component; import java.util.List; /** * @author 黄大娘 * @company dogson有限公司 * @create 2019-09-25 1:32 * 处理 * * ..*Service.*Pager 这个方法,只要调用这个方法,就能够达到分页的效果 * PageHelper.start() * 调用目标方法之前 * 处理结果集 */ @Component @Aspect public class PagerAspect @Around("execution(* * ..*Service.*Pager(..))") public Object invoke(ProceedingJoinPoint args) throws Throwable //判断符合条件的方法中是否包含pageBean参数 Object [] params= args.getArgs(); PageBean pageBean = null; for (Object param : params) if (param instanceof PageBean) pageBean =(PageBean) param; break; if (pageBean!=null && pageBean.isPagination()) PageHelper.startPage(pageBean.getPage(),pageBean.getRows()); Object list = args.proceed(params); if (pageBean!=null && pageBean.isPagination()) PageInfo pageInfo = new PageInfo((List) list); pageBean.setTotal(pageInfo.getTotal()+""); return list;
测试:
SpringBaseTestipml
@Test public void hhhh() Map map = new HashMap(); map.put("bname", StringUtils.toLikeStr("圣墟")); List<Map> hhhh = this.bookService.hhhh(map,pageBean); for (Map m : hhhh) System.out.println(m);
这个是不进行分页的方法
效果:
SpringBaseTestipml
@Test public void listPager() Map map = new HashMap(); map.put("bname", StringUtils.toLikeStr("圣墟")); List<Map> listPager = this.bookService.listPager(map,pageBean); for (Map m : listPager) System.out.println(m);
调用分页方法去查询显示前十条数据
谢谢观看!
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