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  • Java SSM入门(十一)——SSM整合

    iwehdio的博客园:https://www.cnblogs.com/iwehdio/

    1、Spring

    • 整合方式:用Spring去整合其他的框架,XML + 注解。

    • maven坐标:

      <?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>org.example</groupId>
        <artifactId>ssm_zhenghe</artifactId>
        <version>1.0-SNAPSHOT</version>
        <packaging>war</packaging>
      
        <name>ssm_zhenghe 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>
          <spring.version>5.0.2.RELEASE</spring.version>
          <slf4j.version>1.6.6</slf4j.version>
          <log4j.version>1.2.12</log4j.version>
          <mysql.version>5.1.6</mysql.version>
          <mybatis.version>3.4.5</mybatis.version>
        </properties>
      
        <dependencies>
          <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
          </dependency>
          <!-- spring -->
          <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.8</version>
          </dependency>
      
          <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</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-web</artifactId>
            <version>${spring.version}</version>
          </dependency>
      
          <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
          </dependency>
      
          <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</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-jdbc</artifactId>
            <version>${spring.version}</version>
          </dependency>
      
          <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
          </dependency>
      
          <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
          </dependency>
      
          <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
          </dependency>
      
          <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
          </dependency>
      
          <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
          </dependency>
      
          <!-- log start -->
          <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
          </dependency>
      
          <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
          </dependency>
      
          <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
          </dependency>
          <!-- log end -->
          <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
          </dependency>
      
          <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
          </dependency>
      
          <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
            <type>jar</type>
            <scope>compile</scope>
          </dependency>
      
        </dependencies>
      
        <build>
          <finalName>ssm_zhenghe</finalName>
          <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
            <plugins>
              <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>
      
    • 搭建基础环境:

      • domin包及实体类。
      • dao包及接口。
      • service包及接口和实现类。
      • controller包及控制器。
    • 搭建Spring框架:

      • 创建applicationContext.xml,并配置约束:

        <?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:aop="http://www.springframework.org/schema/aop"
        	xmlns:tx="http://www.springframework.org/schema/tx"
        	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/aop
        	http://www.springframework.org/schema/aop/spring-aop.xsd
        	http://www.springframework.org/schema/tx 
        	http://www.springframework.org/schema/tx/spring-tx.xsd">
        	
        </beans>
        
      • 配置扫描注解的包:

        <!-- Spring注解只扫dao和service -->
        <context:component-scan base-package="cn.iwehdio">
            <!-- 那些注解不扫描 -->
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
        
      • 在AccountServiceImpl类上加注解@Service("accountService")

      • 测试Spring:

        @Test
        public void test1() {
            ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
            AccountService as = (AccountService) ac.getBean("accountService");
            as.findAll();
        }
        

    2、SpringMVC

    • 搭建SpringMVC框架:

      • web.xml下配置前端控制器:

        <servlet>
            <servlet-name>dispatcherServlet</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:springmvc.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>dispatcherServlet</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
        
        <filter>
            <filter-name>characterEncodingFilter</filter-name>
            <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
            <init-param>
                <param-name>encoding</param-name>
                <param-value>UTF-8</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>characterEncodingFilter</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
        
      • 创建springmvc.xml,并配置约束:

        <?xml version="1.0" encoding="UTF-8"?>
        <beans xmlns="http://www.springframework.org/schema/beans"
               xmlns:mvc="http://www.springframework.org/schema/mvc"
               xmlns:context="http://www.springframework.org/schema/context"
               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
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd">
            
        </beans>
        
      • 配置:

        <!-- 开启注解扫描,只扫描controll -->
        <context:component-scan base-package="cn.iwehdio">
            <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
        
        <!-- 配置视图解析器 -->
        <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/pages/"></property>
            <property name="suffix" value=".jsp"></property>
        </bean>
        
        <!-- 过滤静态资源 -->
        <mvc:resources location="/css/" mapping="/css/**" />
        <mvc:resources location="/images/" mapping="/images/**" />
        <mvc:resources location="/js/" mapping="/js/**" />
        
        <!-- 开启SpringMVC注解支持 -->
        <mvc:annotation-driven></mvc:annotation-driven>
        
      • 配置控制器:

        @Controller
        @RequestMapping("/account")
        public class AccountController {
        
            @RequestMapping("findAll")
            public String findAll(){
                System.out.println("表现层查询所有");
                return "list";
            }
        }
        
      • 编写index.jsp和list.jsp。

    • Spring整合SpringMVC:

      • 启动Tomcat时,自动加载了springmvc.xml,但还需要加载applicationContext.xml文件。

        • ServletContext生命周期与服务器相同。

        • 有一类监听器,监听ServletContext的创建和销毁。

        • 用这个监听器加载Spring的配置文件applicationContext.xml。

        • 配置监听器,监听器会默认加载WEB-INF目录下的applicationContext.xml文件,因此还需要配置路径到类路径下。(resources路径编译后在类路径下)

        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </context-param>
        
      • 在控制器中注入:

        @Autowired
        private AccountService accountService;
        

    3、Mybatis

    • 搭建Mybatis框架:

      • 创建SqlMapConfig.xml,配置约束:

        <?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">
        
      • 配置:

        <configuration>
            <!-- 配置环境 -->
            <environments default="mysql">
                <environment id="mysql">
                    <transactionManager type="JDBC"></transactionManager>
                    <dataSource type="POOLED">
                        <property name="driver" value="com.mysql.jdbc.Driver"/>
                        <property name="url" value="jdbc:mysql://localhost:3306/ssm"/>
                        <property name="username" value="root"/>
                        <property name="password" value="root"/>
                    </dataSource>
                </environment>
            </environments>
            <!-- 映射配置文件 -->
            <mappers>
                <mapper class="cn.iwehdio.dao.AccountDao"></mapper>
                <!-- 或扫描包下的所有接口 
                <package name="cn.iwehdio.dao"/>-->
            </mappers>
        </configuration>
        
      • 在dao接口上用注解配置SQL语句:

        @Select("select * from account")
        public List<Account> findAll();
        
        @Select("insert into account (name,money) values (#{name},#{money})")
        public void saveAccount(Account account);
        
      • 测试(增删改需要commit):

        public class testMybatis {
            @Test
            public void test() throws IOException {
                //加载配置文件
                InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
                //创建SqlSessionFactory对象
                SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
                //创建SqlSession
                SqlSession sqlSession = factory.openSession();
                //获取代理对象
                AccountDao mapper = sqlSession.getMapper(AccountDao.class);
                //进行查询
                List<Account> all = mapper.findAll();
                for (Account a : all) {
                    System.out.println(a.getName());
                }
                //释放资源
                sqlSession.close();
                in.close();
            }
        }
        
    • Spring整合Mybatis:

      • applicationConfigContext.xml下配置Mybatis:

        <!-- 整合Mybatis -->
        <!-- 配置连接池 -->
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="com.mysql.jdbc.Driver"/>
            <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ssm"/>
            <property name="user" value="root"/>
            <property name="password" value="root"/>
        </bean>
        <!-- 配置工厂对象 -->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
        <!-- 配置接口所在的包 -->
        <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="cn.iwehdio.dao"></property>
        </bean>
        
      • 可以去掉SqlMapConfig.xml。

      • 在AccountDao接口上加@Repository注解。

      • 在AccountServiceImpl中注入:

        @Service("accountService")
        public class AccountServiceImpl implements AccountService {
        
            @Autowired
            private AccountDao accountDao;
        
            @Override
            public List<Account> findAll() {
                System.out.println("业务层findall");
                return accountDao.findAll();
            }
        
            @Override
            public void saveAccount(Account account) {
                System.out.println("业务层save");
                accountDao.saveAccount(account);
            }
        }
        
      • 控制器查询并跳转:

        @RequestMapping("findAll")
        public String findAll(Model model){
            System.out.println("表现层查询所有");
            List<Account> all = accountService.findAll();
            model.addAttribute("list", all);
            return "list";
        }
        
      • 前端显示:

        <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
        <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
        <html>
        <head>
            <title>Title</title>
        </head>
        <body>
            <h3>findAll</h3>
            <c:forEach items="${list}" var="account">
                ${account.name}
            </c:forEach>
        </body>
        </html>
        
    • 整合声明式事务管理:

      • applicationConfigContext.xml下配置事务管理:

        <!-- 配置事务管理器 -->
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
        <!-- 配置事务通知 -->
        <tx:advice id="txAdvice" transaction-manager="transactionManager">
            <tx:attributes>
                <tx:method name="find*" read-only="true"/>
                <tx:method name="*" isolation="DEFAULT"/>
            </tx:attributes>
        </tx:advice>
        <!-- 配置AOP增强 -->
        <aop:config>
            <aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.iwehdio.service.Impl.*ServiceImpl.*(..))"></aop:advisor>
        </aop:config>
        
      • 控制器保存账户:

        @RequestMapping("save")
        public void save(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException {
            accountService.saveAccount(account);
            response.sendRedirect(request.getContextPath()+"/account/findAll");
            return;
        }
        

    iwehdio的博客园:https://www.cnblogs.com/iwehdio/
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  • 原文地址:https://www.cnblogs.com/iwehdio/p/13160017.html
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