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  • Mybatis与Spring集成

    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>
                    &lt;!&ndash;开启驼峰命名&ndash;&gt;
                <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

     

     

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  • 原文地址:https://www.cnblogs.com/xmf3628/p/11701337.html
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