SSM框架整合（二）：maven module的web项目

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工程结构

使用maven工程，项目结构如下：

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一、SSM整合

1.引入库

父工程的pom文件

<?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.mediacomm</groupId>
    <artifactId>project_ssm_adminlte</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>ssm_dao</module>
        <module>ssm_domain</module>
        <module>ssm_service</module>
        <module>ssm_utils</module>
        <module>ssm_webapp</module>
    </modules>
    <properties>
        <lombok.version>1.18.12</lombok.version>
        <spring.version>5.0.2.RELEASE</spring.version>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <mybatis.version>3.4.5</mybatis.version>
        <spring.security.version>5.0.1.RELEASE</spring.security.version>
        <mysql.version>5.1.6</mysql.version>
    </properties>

    <dependencies>
    	<!--用途：为实体类的属性创建get、set和toString方法-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>

		<!--用途：切入点表达式-->
        <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-context-support</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-orm</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-core</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-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</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>
        <!--用途：数据库连接池-->
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <!--用途：数据库分页查询-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.1.2</version>
        </dependency>
        
        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>jsr250-api</artifactId>
            <version>1.0</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</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>
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.1.2</version>
        </dependency>

        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>jsr250-api</artifactId>
            <version>1.0</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.0</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
    </dependencies>

</project>

2.ssm_webapp项目结构

3.配置SpringMVC

1、创建请求控制类

@Controller
@RequestMapping("/orders")
public class OrderController {
    
    
    @RequestMapping("/findById.do")
    public ModelAndView findOrder(@RequestParam(name = "id") String id) throws MyException{
    
    
        ModelAndView mv = new ModelAndView();
        try{
    
    
            Order order = orderService.findOrderById(id);
            mv.addObject("orders",order);
            mv.setViewName("orders-desc");
        }catch (Exception e){
    
    
            e.printStackTrace();
            throw new MyException("查询订单详情失败");
        }
        return mv;
    }

2、在ssm_webapp中，的resource中创建SpringMVC的配置文件，如下：

<?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
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        https://www.springframework.org/schema/mvc/spring-mvc.xsd">

	<!--springmvc注解扫描-->
    <context:component-scan base-package="com.mediacomm.controller">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
	<!--响应视图-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/pages/"></property>
        <property name="suffix" value=".jsp"/>
    </bean>
    
    <!--我自定的类型转换器MVCDateConverter-->
    <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <array>
                <bean class="com.mediacomm.converter.MVCDateConverter"></bean>
            </array>
        </property>
    </bean>
    
    <!--异常处理器-->
    <bean id="dxceptionResolver" class="com.mediacomm.exceptionresolver.ExceptionResolver"></bean>
	
	<!--静态资源过滤，指定哪些资源不会被springmvc的dispatcher拦截-->
    <mvc:resources mapping="/js/**" location="/js/"/>
    <mvc:resources mapping="/css/**" location="/css/"/>
    <mvc:resources mapping="/img/**" location="/img/"/>
    <mvc:resources mapping="/plugins/**" location="/plugins/"/>

	<!--引入自定义类型转换器-->
    <mvc:annotation-driven conversion-service="conversionService"/>
</beans>

3、在web.xml配置springmvc的dispatcer启动及加载对应的配置文件

<!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://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">

  <display-name>Archetype Created Web Application</display-name>
  <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>
  	<!--我定义的请求都是@RequestMapping("/findById.do")，所以指定拦截*.do-->
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

  <!--字符过滤器-->
  <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>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>*.do</url-pattern>
  </filter-mapping>

4.配置Spring，及Mybatis整合

1、创建spring配置文件

<?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"
       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">
    
    <!--指定注解扫描-->
    <context:component-scan base-package="com.mediacomm">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

	<!--指定加载的配置文件-->
    <context:property-placeholder location="classpath:db.properties" ></context:property-placeholder>
    <!--创建数据库连接池-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.user}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

	<!--mybatis提供的整合到spring中的方式，SqlSessionFactoryBean-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean>

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

    <bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    
    <!--使用通知，配置事务的控制方式-->
    <tx:advice id="advice" transaction-manager="dataSourceTransactionManager">
        <tx:attributes>
            <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
            <tx:method name="*" propagation="REQUIRED" read-only="false"/>
        </tx:attributes>
    </tx:advice>
    <!--配置aop来控制事务-->
    <aop:config>
        <aop:pointcut id="pt1" expression="execution(* com.mediacomm.dao.*.*(..))"/>
        <aop:advisor advice-ref="advice" pointcut-ref="pt1"/>
    </aop:config>

    
</beans>

2、在web.xml配置spring配置文件的加载

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationSpringConfig.xml</param-value>
  </context-param>
</web-app>

二、部署到tomcat

我直接发布war包到本地的tomcat服务，运行

三、测试一对多查询

1.表的关系

关系：一个订单对应多个游客信息，分别创建订单表、游客表，然后创建一个中间表，中间表中仅有两列数据，即订单id和对应的游客id
查询思路：通过订单id查询到中间表中该订单id对应的游客id，再去以游客id查询游客表的游客信息

2.订单实体类

public class Order {
    
    
    private String id;
    private String orderNum;
    private Date orderTime;
    private int peopleCount;
    private String orderDesc;
    private int payType;
    private int orderStatus;
	//对应多个游客
    private List<Traveller> travellers;

3.dao接口的注解

订单的dao接口

public interface OrderDao {
    
    
	@Select("select * from orders where id = #{orderId}")
    @Results(id = "orderMap",value = {
    
    
            @Result(id = true,column = "id",property = "id"),
            @Result(column = "orderNum",property = "orderNum"),
            @Result(column = "orderTime",property = "orderTime"),
            @Result(column = "peopleCount",property = "peopleCount"),
            @Result(column = "orderDesc",property = "orderDesc"),
            @Result(column = "payType",property = "payType"),
            @Result(column = "orderStatus",property = "orderStatus"),
            @Result(column = "id",property = "travellers",javaType = java.util.List.class,
                    many = @Many(select = "com.mediacomm.dao.TravellerDao.findTravellersWithOrders",fetchType = FetchType.DEFAULT))
    })
    Order findOrderById(String orderId)throws MyException;

游客的dao接口

public interface TravellerDao {
    
    

    @Select("SELECT tra.* from traveller tra,order_traveller ord_tra where ord_tra.orderId = #{orderId} and tra.id = ord_tra.travellerId")
    List<Traveller> findTravellersWithOrders(String orderId);
}

4.测试结果

请求：http://localhost:8080/ssm_webapp_war/orders/findById.do？id=0E7231DC797C486290E8713CA3C6ECCC
显示：

部署失败遇到的问题

1.Resource的文件没有部署到tomcat

在web模块的pom文件中，引入resources标签，让maven打包时将指定的资源文件也一起打包

<build>
    <finalName>ssm_webapp</finalName>
    <resources>
      <resource>
        <directory>src/main/resource</directory>
        <includes>
          <include>**/**</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>

2.${pageContext.request.contextPath}获取不到当前应用的路径

解决方案一：在jsp的头部声明中，加入isELIgnored=“false”，声明不忽略el表达式
如：

<%@ page language="java" contentType="text/html; charset=UTF-8" isELIgnored="false"
	pageEncoding="UTF-8"%>

解决方案二：在模块的web.xml中配置，这样就全部jsp都可以生效

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">

3.jdbc连接提示驱动ClassNotFoundException

我是通过properties配置文件来设置数据库的相关信息的，结果发现是因为properties文件中的值加的双引号，如下：

jdbc.driver=“com.mysql.jdbc.Driver”

小小的问题找了老半天，特此记录一下，用等于赋值就不用加引号！！囧