1.添加相关的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.hmc</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> <!--junit--> <junit.version>4.12</junit.version> <!--servlet --> <servlet.version>4.0.0</servlet.version> <!--5.0.2.RELEASE--> <spring.version>5.0.2.RELEASE</spring.version> <!--mybatis--> <mybatis-version>3.4.5</mybatis-version> <!--mysql--> <mysql.version>5.1.44</mysql.version> <!--pagehelper--> <pagehelper.version>5.1.2</pagehelper.version> <!--mybatis与spring集成jar--> <mybatis.spring.version>1.3.1</mybatis.spring.version> <!--dbcb2连接池--> <commons.dbcp2.version>2.1.1</commons.dbcp2.version> <commons.pool2.version>2.4.3</commons.pool2.version> <!--lofj2--> <lofj2.version>2.9.1</lofj2.version> <!--lombok--> <lombok.version>1.18.2</lombok.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> <!--servlet --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>${servlet.version}</version> <scope>provided</scope> </dependency> <!--spring--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <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> <!--mysql--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis-version}</version> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>${pagehelper.version}</version> </dependency> <!--mybatis与spring集成jar--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis.spring.version}</version> </dependency> <!--dbcp2数据库连接池--> <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> <!--lofj2--> <!-- log配置:Log4j2 + Slf4j --> <!-- slf4j核心包 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.7</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>1.7.7</version> <scope>runtime</scope> </dependency> <!--用于与slf4j保持桥接 --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-slf4j-impl</artifactId> <version>2.9.1</version> </dependency> <!--核心log4j2jar包 --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>2.9.1</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>2.9.1</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>2.9.1</version> <scope>runtime</scope> </dependency> <!--需要使用log4j2的AsyncLogger需要包含disruptor --> <dependency> <groupId>com.lmax</groupId> <artifactId>disruptor</artifactId> <version>3.2.0</version> </dependency> <!--ehcache相关依赖--> <!--spring对ehcache的相关支持--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <!--mybatis与ehcache整合--> <dependency> <groupId>org.mybatis.caches</groupId> <artifactId>mybatis-ehcache</artifactId> <version>1.1.0</version> </dependency> <!--ehcache依赖--> <dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache</artifactId> <version>2.10.0</version> </dependency> </dependencies> <build> <finalName>ssm</finalName> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> <!--对应的资源目录--> <resource> <directory>src/main/resources</directory> <includes> <include>*.properties</include> <include>*.xml</include> </includes> </resource> </resources> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.7.0</version> <configuration> <source>${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>${mysql.version}</version> </dependency> </dependencies> <configuration> <overwrite>true</overwrite> </configuration> </plugin> </plugins> </pluginManagement> </build> </project>
2.创建spring配置文件Spring-Mybatis.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!--1.开启注解,并指定扫描位置--> <!-- 注解驱动 --> <context:annotation-config/> <!-- 用注解方式注入bean,并指定查找范围:com.zking.ssh2及子子孙孙包--> <context:component-scan base-package="com.hmc.ssm"/> <!--2.导入外部jdbc数据库连接配置--> <context:property-placeholder location="classpath:jdbc.properties"/> <!--3.配置dbcp2数据库连接池--> <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${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与mybatis集成配置--> <!--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/hmc/ssm/**/mapper/*.xml"/> <!-- 指定别名 --> <!-- <property name="typeAliasesPackage" value="com/hmc/ssm/**/model"/>--> <!--<property name="configurationProperties"> <props> <!–开启驼峰命名–> <prop key="mapUnderscoreToCamelCase">true</prop> </props> </property>--> <!--设置mybaits对缓存的支持--> <property name="configurationProperties"> <props> <!-- 全局映射器启用缓存 *主要将此属性设置完成即可--> <prop key="cacheEnabled">true</prop> <!-- 查询时,关闭关联对象即时加载以提高性能 --> <prop key="lazyLoadingEnabled">false</prop> <!-- 设置关联对象加载的形态,此处为按需加载字段(加载字段由SQL指 定),不会加载关联表的所有字段,以提高性能 --> <prop key="aggressiveLazyLoading">true</prop> </props> </property> <!--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/zking/oa/**/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/hmc/ssm/**/mapper"/> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> </bean> <!--5.配置注解式事务(推荐使用声明式事务)--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <tx:annotation-driven transaction-manager="transactionManager" /> <!--6.开启动态代理--> <aop:aspectj-autoproxy/> </beans>
3.注解式开发
@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。
@Repository:将DAO类声明为Bean
@Service:通常作用在业务层
@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
4.Spring Test+Junit完美组合
4.1 在工程的pom文件中增加spring-test的依赖
4.Spring Test+Junit完美组合
4.1 在工程的pom文件中增加spring-test的依赖
4.2 创建测试类,并在该类上加上两个注解
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:“spring-mybatis.xml"})
测试查询单条数据
public class IBookServiceImplTest {
@Autowired
private IBookService IBookService;
private Book Book;
@After
public void setup(){
Book=new Book();
}
@Test
public void book() {
Book book = IBookService.selectByPrimaryKey(700);
System.out.println(book);
// System.out.println("------------------");
// Book book2= IBookService.selectByPrimaryKey(701);
// System.out.println(book2);
}
5.使用aop思想进行分页
1.定义切面类 PageAspect
@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
@Aspect 表示将这个类定义为切面类,让sprig进行管理
@Component @Aspect public class PageAspect { //环绕通知注解(切入点) @Around(value="execution(* *..*Service.*Page(..))") public Object invoke(ProceedingJoinPoint joinPoint) throws Throwable { //1.获取目标方法的执行参数 Object[] arrgs= joinPoint.getArgs(); //定义PageBean对象 PageBean pageBean=null; //循环遍历参数 for (Object arg : arrgs) { if (arg instanceof PageBean){ pageBean=(PageBean)arg; break; } } //2.判断是否分页,并设置分页参数PageHelper中 if(null!=pageBean&&pageBean.isPagination()){ PageHelper.startPage(pageBean.getPage(),pageBean.getRows()); } //3 执行目标方法 Object result=joinPoint.proceed(arrgs); //4.获取分页信息 if(null!=pageBean&&pageBean.isPagination()&& null!=result&&result instanceof List){ List lst=(List)result; PageInfo PageInfo=new PageInfo(lst); pageBean.setTotal(PageInfo.getTotal()+""); } return result; }
/**pointcut属性用来定义一个切入点,分成四个部分理解 [* ][*..][*Biz][.*(..)]
<!-- A: 返回类型,*表示返回类型不限 -->
<!-- B: 包名,*..表示包名不限 -->
<!-- C: 类或接口名,*Biz表示类或接口必须以Biz结尾 -->
<!-- D: 方法名和参数,*(..)表示方法名不限,参数类型和个数不限 -->
**/
测试分页效果
@Test public void Test(){ PageBean PageBean=new PageBean(); List<Book> books = IBookService.queryPage(Book, PageBean); System.out.println("总记录数"+PageBean.getTotal()); System.out.println("分页"); for (Book book : books) { System.out.println(book); } }
接下来我们在使用aop实现以下简单的日志功能
在切面类添加以下方法
//定义切入点 @Pointcut("execution(* *..*Service.*(..))") public void Pointcut(){ } // //前置通知,将前置通知织入到Pointcut()切入点 @Around("Pointcut()") public String Around(ProceedingJoinPoint joinPoint){ //1.获取目标方法的执行参数 Object[] args = joinPoint.getArgs();//2. //目标对象 Object aThis = joinPoint.getThis(); Object target = joinPoint.getTarget().getClass().getName(); System.out.println("执行时间"+new Date()); System.out.println("类全路径+"+target); System.out.println("参数:"+args[0]+"--------"); System.out.println("执行的方法"+joinPoint.getSignature().getName()); return "执行成功"; }
我们看一下结果