mybatis整合Spring

整合步骤创建spring配置文件applicationContextSpring Test+Junit完美组合spring整合pagehelper代码实践项目结构1、导入pom依赖

整合步骤

hibernate整合 mybatis整合

创建spring配置文件applicationContext

2.1 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.liuchunming及子子孙孙包-

<context:component-scan base-package="com.liuchunming"/>

引入外部jdbc配置文件

<context:property-placeholder location="classpath:jdbc.properties"/>

spring和mybatis整合

2.5 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 切面

2.6 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： 相当于之前spring、hibernate时代中的set注入，省去set、get方法 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

Spring Test+Junit完美组合

在工程的pom文件中增加spring-test的依赖

<dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency>

创建BaseTestCase，并在该类上加上两个注解

@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations={"classpath:applicationContext.xml"})

使用idean的junit插件(JUnitGenerator V2.0)生成测试用例

注1：还需要修改相关配置，详情参考资料：“IDEA Junit4配置.mht” 注2：快捷键，Ctrl + Shift + T

在执行单元测试时,为了避免产生脏数据,可将测试单元设置成事务回滚

@Rollback(value = true|false)//true回滚事务，false提交事务 @Transactional(transactionManager = "transactionManager")

spring整合pagehelper

使用AOP编程解决分页代码重复的问题

创建一个分页的环绕通知类 必要的两个东西 语法结构：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。

注：

方法必须保持一致

public Object invoke(ProceedingJoinPoint args) throws Throwable{return null}

代码实践

项目结构

上篇博客贴过的代码就不重复贴了

1、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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.liuchunming</groupId> <artifactId>ssm</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>ssm Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <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> </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> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <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> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> </build> </project>

BookMapper

package com.liuchunming.mapper; import com.liuchunming.model.Book; import org.springframework.stereotype.Repository; import java.util.List; import java.util.Map; /** * @ Component * 代表当前的类被Spring所管理 * @ Repository * 专门用来标记Mapper接口的 * @ Service * 专门标记Service类的 * * 相当于注解的具象化 */ @Repository public interface BookMapper { int deleteByPrimaryKey(Integer bid); int insert(Book record); int insertSelective(Book record); Book selectByPrimaryKey(Integer bid); int updateByPrimaryKeySelective(Book record); int updateByPrimaryKey(Book record); List<Map> aaaa(Map map); }

BookMapper.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.liuchunming.mapper.BookMapper" > <resultMap id="BaseResultMap" type="com.liuchunming.model.Book" > <constructor > <idArg column="bid" jdbcType="INTEGER" javaType="java.lang.Integer" /> <arg column="bname" jdbcType="VARCHAR" javaType="java.lang.String" /> <arg column="price" jdbcType="REAL" javaType="java.lang.Float" /> </constructor> </resultMap> <sql id="Base_Column_List" > bid, bname, price </sql> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" > select <include refid="Base_Column_List" /> from t_mvc_book where bid = #{bid,jdbcType=INTEGER} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" > delete from t_mvc_book where bid = #{bid,jdbcType=INTEGER} </delete> <insert id="insert" parameterType="com.liuchunming.model.Book" > insert into t_mvc_book (bid, bname, price ) values (#{bid,jdbcType=INTEGER}, #{bname,jdbcType=VARCHAR}, #{price,jdbcType=REAL} ) </insert> <insert id="insertSelective" parameterType="com.liuchunming.model.Book" > insert into t_mvc_book <trim prefix="(" suffix=")" suffixOverrides="," > <if test="bid != null" > bid, </if> <if test="bname != null" > bname, </if> <if test="price != null" > price, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="bid != null" > #{bid,jdbcType=INTEGER}, </if> <if test="bname != null" > #{bname,jdbcType=VARCHAR}, </if> <if test="price != null" > #{price,jdbcType=REAL}, </if> </trim> </insert> <update id="updateByPrimaryKeySelective" parameterType="com.liuchunming.model.Book" > update t_mvc_book <set > <if test="bname != null" > bname = #{bname,jdbcType=VARCHAR}, </if> <if test="price != null" > price = #{price,jdbcType=REAL}, </if> </set> where bid = #{bid,jdbcType=INTEGER} </update> <update id="updateByPrimaryKey" parameterType="com.liuchunming.model.Book" > update t_mvc_book set bname = #{bname,jdbcType=VARCHAR}, price = #{price,jdbcType=REAL} where bid = #{bid,jdbcType=INTEGER} </update> <select id="aaaa" 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> </mapper>

BookService

package com.liuchunming.service; import com.liuchunming.model.Book; import com.liuchunming.util.PageBean; import java.util.List; import java.util.Map; /** * @author liuchunming * @site www.liuchunming.com * @company xxx公司 * @create 2020-10-15 20:19 */ 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); List<Map> aaaa(Map map, PageBean pageBean); List<Map> listPager(Map map, PageBean pageBean); }

BookServiceImpl

package com.liuchunming.service.impl; import com.liuchunming.mapper.BookMapper; import com.liuchunming.model.Book; import com.liuchunming.service.BookService; import com.liuchunming.util.PageBean; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; import java.util.Map; /** * @author liuchunming * @site www.liuchunming.com * @company xxx公司 * @create 2020-10-15 20:21 */ @Service public class BookServiceImpl 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); } @Override public List<Map> aaaa(Map map, PageBean pageBean) { return bookMapper.aaaa(map); } @Override public List<Map> listPager(Map map, PageBean pageBean) { return bookMapper.aaaa(map); } }

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--> <import resource="applicationContext-mybatis.xml"></import> </beans>

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.javaxl.ssm及子子孙孙包--> <context:component-scan base-package="com.liuchunming"/> <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/liuchunming/**/mapper/*.xml"/> <!-- 指定别名 --> <property name="typeAliasesPackage" value="com/liuchunming/**/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/liuchunming/**/mapper"/> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> </bean> <!--注解式事务--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!--事务管理器注解扫描驱动--> <tx:annotation-driven transaction-manager="transactionManager" /> <aop:aspectj-autoproxy/> </beans>

generatorConfig.xml

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" > <generatorConfiguration> <!-- 引入配置文件 --> <properties resource="jdbc.properties"/> <!--指定数据库jdbc驱动jar包的位置--> <classPathEntry location="E:\maven\repository\mvn-repository\mysql\mysql-connector-java\5.1.44\mysql-connector-java-5.1.44.jar"/> <!-- 一个数据库一个context --> <context id="infoGuardian"> <!-- 注释 --> <commentGenerator> <property name="suppressAllComments" value="true"/><!-- 是否取消注释 --> <property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 --> </commentGenerator> <!-- jdbc连接 --> <jdbcConnection driverClass="${jdbc.driver}" connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/> <!-- 类型转换 --> <javaTypeResolver> <!-- 是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） --> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <!-- 01 指定javaBean生成的位置 --> <!-- targetPackage：指定生成的model生成所在的包名 --> <!-- targetProject：指定在该项目下所在的路径 --> <javaModelGenerator targetPackage="com.liuchunming.model" targetProject="src/main/java"> <!-- 是否允许子包，即targetPackage.schemaName.tableName --> <property name="enableSubPackages" value="false"/> <!-- 是否对model添加构造函数 --> <property name="constructorBased" value="true"/> <!-- 是否针对string类型的字段在set的时候进行trim调用 --> <property name="trimStrings" value="false"/> <!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法，只有构造方法 --> <property name="immutable" value="false"/> </javaModelGenerator> <!-- 02 指定sql映射文件生成的位置 --> <sqlMapGenerator targetPackage="com.liuchunming.mapper" targetProject="src/main/java"> <!-- 是否允许子包，即targetPackage.schemaName.tableName --> <property name="enableSubPackages" value="false"/> </sqlMapGenerator> <!-- 03 生成XxxMapper接口 --> <!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 --> <!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 --> <!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 --> <javaClientGenerator targetPackage="com.liuchunming.mapper" targetProject="src/main/java" type="XMLMAPPER"> <!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model， true:com.oop.eksp.user.model.[schemaName] --> <property name="enableSubPackages" value="false"/> </javaClientGenerator> <!-- 配置表信息 --> <!-- schema即为数据库名 --> <!-- tableName为对应的数据库表 --> <!-- domainObjectName是要生成的实体类 --> <!-- enable*ByExample是否生成 example类 --> <!--<table schema="" tableName="t_book" domainObjectName="Book"--> <!--enableCountByExample="false" enableDeleteByExample="false"--> <!--enableSelectByExample="false" enableUpdateByExample="false">--> <!--&lt;!&ndash; 忽略列，不生成bean 字段 &ndash;&gt;--> <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;--> <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;--> <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;--> <!--</table>--> <table schema="" tableName="t_mvc_Book" domainObjectName="Book" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false"> <!-- 忽略列，不生成bean 字段 --> <!-- <ignoreColumn column="FRED" /> --> <!-- 指定列的java数据类型 --> <!-- <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> --> </table> </context> </generatorConfiguration>

PagerAspect

package com.liuchunming.component; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.liuchunming.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 liuchunming * @site www.liuchunming.com * @company xxx公司 * @create 2020-10-19 19:56 */ @Component @Aspect public class PagerAspect { /** * 切面： * * 返回类型不限 * *.. 任意包下 * *.Service 任意以.Service结尾的接口或类 * *.Pager(..) 什么方法要被切 * * 目的： * 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 * * 解决防止调用该方法传的类型不是pagebean * */ @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 Object[] params = args.getArgs();//获取到所有的参数 PageBean pageBean =null; for (Object param : params) { if(param instanceof PageBean){ //如果匹配上pagebean pageBean =(PageBean) param; break; } } if(pageBean !=null && pageBean.isPagination()){ PageHelper.startPage(pageBean.getPage(),pageBean.getRows()); } Object list = args.proceed(params);//调用目标方法 if(pageBean !=null && pageBean.isPagination()){//处理总页数 PageInfo pageInfo =new PageInfo((List) list); pageBean.setTotal(pageInfo.getTotal()+""); } return list; } }

创建juit测试类 SpringBaseTest

package com.liuchunming; import com.liuchunming.model.Book; import com.liuchunming.util.PageBean; import org.junit.Before; import org.junit.runner.RunWith; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; /** * @author liuchunming * @site www.liuchunming.com * @company xxx公司 * @create 2020-10-15 20:12 */ @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(); } }

BookServiceImplTest

package com.liuchunming.service.impl; import com.liuchunming.SpringBaseTest; import com.liuchunming.model.Book; import com.liuchunming.service.BookService; import com.liuchunming.util.StringUtils; import org.junit.Test; import org.springframework.beans.factory.annotation.Autowired; import java.util.HashMap; import java.util.List; import java.util.Map; /** * @author liuchunming * @site www.liuchunming.com * @company xxx公司 * @create 2020-10-16 10:44 */ public class BookServiceImplTest extends SpringBaseTest { @Autowired private BookService bookService; @Test public void insert() { book.setBid(3); book.setBname("t243 ssm"); book.setPrice(996f); bookService.insert(book); } @Test public void selectByPrimaryKey() { Book b = this.bookService.selectByPrimaryKey(3); System.out.println(b); } @Test public void aaaa() { Map map=new HashMap(); map.put("bname", StringUtils.toLikeStr("圣墟")); List<Map> aaaa = this.bookService.aaaa(map, pageBean); for (Map m : aaaa) { System.out.println(m); } } @Test public void listPager() { Map map=new HashMap(); map.put("bname", StringUtils.toLikeStr("圣墟")); pageBean.setPage(3); List<Map> aaaa = this.bookService.listPager(map, pageBean); for (Map m : aaaa) { System.out.println(m); } } }

测试listPager（有分页） 测试aaaa（没有分页）