SSM三大框架整合-分模块版本

Posted 2021-03-08 roadlandscape

0.创建数据库和表结构

create database ssm;
use ssm;
create table account(
　　id int primary key auto_increment,
　　name varchar(20),
　　money double(20,2)
);

1.创建父工程　　oa（pom文件中加上 <packaging>pom</packaging>，删除src文件，因为它仅仅作为一个父工程，不编写代码）

　　在 pom 文件中定义全局版本

<properties>
    <spring.version>5.0.3.RELEASE</spring.version>
</properties>

2.在父工程上右键创建子模块

　　

　　oa_dao：

　　　　在 pom 文件添加依赖

<dependencies>
        <!-- 配置实体类依赖 -->
        <dependency>
            <groupId>com.fgy</groupId>
            <artifactId>oa_domain</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- 数据库驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <!-- mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>
        <!-- spring -->
        <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-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>
        <!-- mybatis和spring整合包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- junit测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>

　　oa_service：

　　　　在 pom 文件添加依赖

<dependencies>
        <!-- 配置实体类依赖 -->
        <dependency>
            <groupId>com.fgy</groupId>
            <artifactId>oa_domain</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- 配置持久层依赖 -->
        <dependency>
            <groupId>com.fgy</groupId>
            <artifactId>oa_dao</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.7</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>
        <!-- junit测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

　　oa_domain：可以不划分此模块，在用到此模块时要记得在对应的 pom 文件中导入此依赖

　　oa_utils：可以不划分此模块，在用到此模块时要记得在对应的 pom 文件中导入此依赖

　　oa_web：使用 webapp 骨架创建，pom文件中加上 <packaging>war</packaging>

　　　　在 pom 文件添加依赖

<dependencies>
        <!-- 配置业务层依赖 -->
        <dependency>
            <groupId>com.fgy</groupId>
            <artifactId>oa_service</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
        <!-- servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <!-- jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- spring -->
        <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>
    </dependencies>

<finalName>oa_web</finalName>
        <plugins>
            <!-- 设置编译插件 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version >
                <configuration>
                    <source>${maven.compiler.source}</source>
                    <target>${maven.compiler.target}</target>
                    <encoding>${project.build.sourceEncoding}</encoding>
                </configuration>
            </plugin>
            <!-- 设置Tomcat插件 -->
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <path>/</path>
                    <port>8080</port>
                </configuration>
            </plugin>
        </plugins>

3.在 oa_dao 的 resources 目录下创建 applicationContext-dao.xml 文件

<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"
       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">

    <!-- 开启注解扫描 -->
    <context:component-scan base-package="com.fgy.oa.dao"/>

    <!-- 数据源 -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/ssm?useUnicode=true&amp;characterEncoding=utf-8"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    </bean>

    <!-- sessionFactory -->
    <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 给实体类起别名 -->
        <property name="typeAliasesPackage" value="com.fgy.oa.domain"/>
    </bean>

    <!-- mapper 扫描器 ：用来产生代理对象 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.fgy.oa.dao"/>
    </bean>

</beans>

　　在 oa_dao 中创建持久层接口：

/**
 * 账户持久层接口
 */
@Repository("accountDao")
public interface AccountDao {
    /**
     * 根据id查询账户信息
     * @param id
     * @return
     */
    @Select("select * from account where id = #{id}")
    Account findById(Integer id);
}

4.在 oa_domain 中创建实体类

/**
 * 账户实体类
 */
public class Account {
    private Integer id;
    private String name;
    private Double money;
    // get 和 set 方法
}

5.测试持久层接口

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext-dao.xml")
public class AccountDaoTest {
    @Autowired
    private AccountDao accountDao;

    @Test
    public void testFindById() {
        Account account = accountDao.findById(1);
        System.out.println(account);
    }
}

6.在 oa_service 的 resources 目录下创建 applicationContext-service.xml 文件

<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">

    <!-- 测试service层时需要导入使用，整合开发统一导入web层即可 -->
    <!--<import resource="applicationContext-dao.xml"/>-->

    <!-- 开启注解扫描 -->
    <context:component-scan base-package="com.fgy.oa.service.impl"/>

    <!-- 事务配置 -->
    <!-- 配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入数据源 -->
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 配置通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="true" propagation="SUPPORTS"/>
            <tx:method name="*" read-only="false" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>
    <!-- 配置 aop -->
    <aop:config>
        <!-- 配置切入点表达式 -->
        <aop:pointcut id="pt" expression="execution(* com.fgy.oa.service.impl.*.*(..))"/>
        <!-- 配置切入点表达式和事务通知的对应关系 -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"></aop:advisor>
    </aop:config>

</beans>

　　dao 新增的方法：

/**
     * 根据名称查询账户信息
     * @param name
     * @return
     */
    @Select("select * from account where name = #{name}")
    Account findByName(String name);

    /**
     * 更新账户信息
     * @param account1
     */
    @Select("update account set name = #{name}, money = #{money} where id = #{id}")
    void update(Account account1);

　　service 代码：

/**
 * 账户业务层接口
 */
public interface AccountService {

    /**
     * 根据id查询账户信息
     * @param id
     * @return
     */
    Account findById(Integer id);

    /**
     * 用户1向用户2转账
     * @param user1
     * @param user2
     * @param money
     */
    void transfer(String user1, String user2, Double money);
}

/**
 * 账户业务层实现类
 */
@Service("accountService")
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccountDao accountDao;

    /**
     * 根据id查询账户信息
     * @param id
     * @return
     */
    @Override
    public Account findById(Integer id) {
        return accountDao.findById(id);
    }

    /**
     * 用户1向用户2转账
     * @param user1
     * @param user2
     * @param money
     */
    @Override
    public void transfer(String user1, String user2, Double money) {
        // 查询用户1
        Account account1 = accountDao.findByName(user1);
        // 查询用户2
        Account account2 = accountDao.findByName(user2);
        // 转账
        account1.setMoney(account1.getMoney() - money);
        account2.setMoney(account2.getMoney() + money);
        // 更新用户1
        accountDao.update(account1);

        // int i = 1/0;

        // 更新用户2
        accountDao.update(account2);
    }
}

7.测试业务层

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext-service.xml")
public class AccountServiceTest {

    @Autowired
    private AccountService accountService;

    @Test
    public void testTransfer() {
        accountService.transfer("张三", "李四", 100.0);
    }
}

8.在 oa_web 的 resources 目录下创建 applicationContext.xml 和 springmvc.xml 文件

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.2.xsd">

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

<?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:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.2.xsd">

    <!-- 开启注解扫描 -->
    <context:component-scan base-package="com.fgy.oa.controller"/>

    <!-- 处理器映射器、处理器适配器
        默认注册处理请求，参数和返回值的类。主要实现了两个接口：HandlerMapping与HandlerAdapter。 -->
    <mvc:annotation-driven/>

    <!-- 静态资源不拦截 -->
    <mvc:default-servlet-handler/>

    <!-- 视图解析器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

　　controller 代码：

/**
 * 账户表现层
 */
@Controller
@RequestMapping("/account")
public class AccountController {

    @Autowired
    private AccountService accountService;

    /**
     * 查询账户详情
     * @param model
     * @param id
     * @return
     */
    @RequestMapping("/findDetail/{id}")
    public String findDetail(Model model, @PathVariable(name = "id") Integer id) {
        Account account = accountService.findById(id);
        model.addAttribute("account", account);
        return "detail";
    }

    /**
     * 测试转账
     * @return
     */
    @RequestMapping("/transfer")
    public String transfer() {
        accountService.transfer("张三", "李四", 100.0);
        return "success";
    }
}

　　index.jsp 页面和 detail.jsp页面：

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>index</title>
</head>
<body>
<a href="${pageContext.request.contextPath}/account/findDetail/1">查询详情</a> <br/>
<a href="${pageContext.request.contextPath}/account/transfer">测试事务是否正常</a>
</body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>detail</title>
</head>
<body>
id：${account.id} <br/>
name：${account.name} <br/>
money：${account.money} <br/>
<img src="${pageContext.request.contextPath}/images/test.jpg">测试静态文件是否放行
</body>
</html>

9.配置 web.xml 文件

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
            http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">

    <!-- 配置过滤器，解决中文乱码的问题 -->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <!-- 指定字符集 -->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <!-- forceEncoding=true意思是指无论客户端请求是否包含了编码，都用过滤器里的编码来解析请求 -->
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>false</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 配置 spring 核心监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- ContextLoaderListener 默认去WEB-INF下加载名称为applicationContext.xml文件
        重新指定配置文件的路径 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <!-- 配置 SpringMVC的核心控制器 -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 配置Servlet的初始化参数，读取spring-web的配置文件，创建spring容器
             如果不指定，默认读取 /WEB-INF/dispatcherServlet-servlet.xml文件 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <!-- 配置servlet启动时加载对象，servlet默认发起请求时才创建，这里是加载配置文件，启动时就需要加载 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

10.启动 Tomcat 测试：

　　..........................