SpringMVC学习笔记(3)

2019-08-09 2019-08-11 8 分钟读完 (大约 1183 个字) 0次访问

SSM案例

导入坐标

<properties>
        <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>
        <!-- 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>compile</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>

创建目录结构

创建spring的配置

创建applicationContext.xml，并导入约束

<?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">
    <!--开启注解的扫描，希望处理servlet和dao，controller不需要spring框架处理-->
    <context:component-scan base-package="com.xushui">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>

测试业务层Spring框架

@Service("accountService")
public class AccountServiceImpl implements com.xushui.service.AccountService {
    @Override
    public void findAll() {
        System.out.println("查询所有账户");
    }
    @Override
    public void saveAccount(Account account) {
        System.out.println("保存账户");
    }
}

Spring测试类

public class TestSpring {
    @Test
    public void testAccountService(){
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        AccountService accountService = ac.getBean("accountService",AccountService.class);

        accountService.findAll();
    }
}

确认Spring框架正常后，进行下一步

SpringMVC框架搭建

引入约束

<?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">

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

编写Controller，并测试SpringMVC环境

@Controller
@RequestMapping("/account")
public class AccountController {
    @RequestMapping("testSpringmvc")
    public String testSpringmvc(){
        System.out.println("testSpringmvc执行了...");
        return "success";
    }
}

Spring整合SpringMVC

目的: 在Controller中能调用service对象的方法

过程:
1. 服务器启动时会创建一个ServletContext域对象，服务器关闭时销毁
2. 有一个监听器，监听ServletContext域对象的创建和销毁，它可以在服务器启动时执行一次
3. 所以我们可以用这个监听器去加载Spring的配置文件

在web.xml配置一个监听器，就可以把Spring的配置文件引入

<!--配置Spring的监听器，默认只加载WEB-INF目录下的applicationContext.xml配置文件-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--设置配置文件的路径-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

然后就可以在Controller中用注解给service对象注入

Mybatis框架搭建

编写配置文件SqlMapConfig.xml

<?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">
<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/spring"/>
                <property name="username" value="root"/>
                <property name="password" value="******"/>
            </dataSource>
        </environment>
    </environments>
    <!--引入映射配置文件-->
    <mappers>
        <!--<mapper class="com.xushui.dao.AccountDao"></mapper>-->
        <package name="com.xushui.dao"></package>
    </mappers>
</configuration>

dao用注解形式配置

public interface AccountDao {
    /**
     * 查询所有账户
     * @return
     */
    @Select("select * from account")
    List<Account>findAll();

    /**
     * 保存账户信息
     * @param account
     */
    @Insert("insert into account(name, money) values(#{name}, #{money})")
    void saveAccount(Account account);
}

测试Mybatis环境

public class TestMybatis {
    @Test
    public void testFindAll() throws Exception {
        // 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对象
        SqlSession sqlSession = factory.openSession();
        // 获取到代理对象
        AccountDao accountDao = sqlSession.getMapper(AccountDao.class);
        // 查询所有
        List<Account> accounts = accountDao.findAll();
        for (Account account : accounts) {
            System.out.println(account);
        }
        // 关闭资源
        sqlSession.close();
        in.close();
    }
}

要注意的是增删改事务要记得提交

Spring整合Mybatis

在Spring的配置文件中配置Mybatis

<!--Spring整合Mybatis框架-->
<!--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:///spring"/>
    <property name="user" value="root"/>
    <property name="password" value="*******"/>
</bean>
<!--配置SqlSessionFactory工厂-->
<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"></property>
</bean>
<!--配置AccountDao接口所在包-->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.xushui.dao"></property>
</bean>

当这边配置好后，就不再需要Mybatis的配置文件
配置好后为Dao接口加上注解@Repository

Spring整合Mybatis第二种

<!--dao层配置文件-->
<!--配置连接池-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql:///maven"/>
    <property name="username" value="root"/>
    <property name="password" value="xu6980584"/>
</bean>
<!--配置SqlSessionFactoryBean-->
<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <!--这个参数可以指定你要把dao.xml放在哪里-->
    <property name="mapperLocations" value="classpath:dao/*.xml"/>
    <!--扫描pojo包，可以给包里的pojo对象起别名-->
    <property name="typeAliasesPackage" value="com.xushui.domain"/>
</bean>
<!--扫描接口包路径，生成包下所有接口的代理对象，并且放入Spring容器-->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.xushui.dao"/>
</bean>

配置Spring的生命是事务管理

在Spring配置文件添加

<!--配置Spring框架声明式事务管理-->
<!--配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"/>
</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="*"/>
    </tx:attributes>
</tx:advice>

<!--配置AOP增强-->
<aop:config>
    <aop:pointcut id="pc1" expression="execution(* com.xushui.service.Impl.*.*(..))"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="pc1"/>
</aop:config>

在AccountController中添加saveAccount方法,用request和response完成进行重定向到其他方法

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

测试

<h3>测试保存</h3>
<form action="account/saveAccount" method="post">
    名字:<input type="text" name="name">
    金额:<input type="text" name="money">
    <input type="submit" value="提交保存">
</form>

使用配置文件的方式搭建Mbatis

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="driverClass" value="com.mysql.jdbc.Driver"/>
    <property name="jdbcUrl" value="jdbc:mysql:///spring"/>
    <property name="user" value="root"/>
    <property name="password" value="******"/>
</bean>

<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"></property>
    <!--使用配置形式，实现接口-->
    <property name="mapperLocations" value="classpath:/mapper/*.xml"></property>
</bean>

<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.xushui.dao"></property>
</bean>

AccountDao.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.xushui.dao.AccountDao">
    <select id="findAll" resultType="com.xushui.domain.Account">
        select * from account
    </select>

    <insert id="saveAccount" parameterType="com.xushui.domain.Account">
        insert into account(name, money) values(#{name}, #{money})
    </insert>
</mapper>

完整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"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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
                http://www.springframework.org/schema/mvc
                http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!--dao层配置文件-->
    <!--配置连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql:///maven"/>
        <property name="username" value="root"/>
        <property name="password" value="xu6980584"/>
    </bean>
    <!--配置SqlSessionFactoryBean-->
    <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--这个参数可以指定你要把dao.xml放在哪里-->
        <property name="mapperLocations" value="classpath:dao/*.xml"/>
        <!--扫描pojo包，可以给包里的pojo对象起别名-->
        <property name="typeAliasesPackage" value="com.xushui.domain"/>
    </bean>
    <!--扫描接口包路径，生成包下所有接口的代理对象，并且放入Spring容器-->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.xushui.dao"/>
    </bean>

    <!--service层配置文件-->
    <context:component-scan base-package="com.xushui.service"/>
    <!--aop面向切面编程，切面就是切入点和通知的组合-->
    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--配置事务的通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="save*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="find*" read-only="true"/>
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>

    <!--配置切面-->
    <aop:config>
        <aop:pointcut id="pc1" expression="execution(* com.xushui.service.Impl.*.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pc1"/>
    </aop:config>
</beans>

本文标题：SpringMVC学习笔记(3)
本文作者：Myhere1
本文链接：https://myhere1.github.io/2019/08/09/SpringMVC学习笔记-3/
发布时间：2019-08-09
版权声明：本博客所有文章除特别声明外，均采用 CC BY-NC-SA 4.0 许可协议。转载请注明出处！

# SpringMVC