SSM项目配置文件

---

1 pom.xml

• 导入依赖，插件等

<?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.kkb</groupId>
    <artifactId>myssm_xzk</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>


    <!--SSM整合 spring mybatis mysql等 -->
    <!-- 集中定义依赖版本号 -->
    <properties>
        <spring.version>5.2.13.RELEASE</spring.version>
        <mybatis.version>3.5.6</mybatis.version>
        <mybatis.spring.version>1.3.3</mybatis.spring.version>
        <pagehelper.version>5.1.10</pagehelper.version>
        <mysql.version>8.0.23</mysql.version>
        <druid.version>1.2.3</druid.version>
        <servlet-api.version>4.0.1</servlet-api.version>
        <jackson.version>2.9.6</jackson.version>
        <log4j.version>1.2.17</log4j.version>
        <junit.version>4.12</junit.version>
    </properties>
    <dependencies>
        <!-- spring -->
        <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>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- Mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis.spring.version}</version>
        </dependency>
        <!-- 分页插件 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>${pagehelper.version}</version>
        </dependency>
        <!-- MySql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>
        <!-- servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${servlet-api.version}</version>
            <scope>provided</scope>
        </dependency>
        <!-- Jackson Json处理工具包 -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <!-- log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <!-- junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <[email protected]注解的依赖-->
        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>javax.annotation-api</artifactId>
            <version>1.3.2</version>
        </dependency>

    </dependencies>
    <!-- 插件配置 -->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory><!--所在的目录-->
                <includes><!--包括目录下的.properties,.xml 文件都会被扫描到-->
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
        <plugins>
            <!-- 设置项目的编译版本 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.0</version>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                    <encoding>UTF-8</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>
                    <!-- 指定端口 -->
                    <port>80</port>
                    <!-- 请求路径 -->
                    <path>/</path>
                    <uriEncoding>UTF-8</uriEncoding>
                </configuration>
            </plugin>
            <!--反向生成插件-->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <configuration>
                    <!--配置文件的路径-->
                    <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
                    <overwrite>true</overwrite>
                </configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.5</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>


</project>

2 spring.xml

spring的相关配置。配置包括除了controller之外的全部内容。因此记忆的时候可以分层次记忆：

• 包扫描

• pojo：简单java类的配置：扫描到这个包即可

• mybatis数据层：包含数据库的配置、接口mapper和映射文件

  • 数据库配置jdbc.properties
  • sqlSessionFactory创建

  原来sqlSessionFactory是通过sqlSessionFactory.build(“mybatis.xml”)创建的，所以这一块的属性基本都和mybatis.xml里定义的参数相关

    - 如果有mybatis配置文件需要先引入进来（configLocation）
    - 利用property定义Mybatis中定义的内容
    	- 数据源dataSource
    	- 别名typeAliasesPackage
    	- mapper映射mapperLocations
    	- 插件->分页插件PageInterceptor->指定reasonable为true
  

  • mapper接口自动装配（无需一个个手动注入）：MapperScannerConfigurer -> 指定sqlSessionFactoryBeanName【因为接口肯定是通过sqlSession.getMapper创建的，所以要指定sqlSession的创建工厂】和basePackage【扫描哪个包这个肯定也要指定】。

• service：事务相关的部分

  • 引入tx命名空间
  • 扫描service包
  • tx:annotation-driven transactionManager配置transactionManager
    • 定义DataSourceTransactionManager

<?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"
       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
">
    <!--扫描配置文件，这样在后面可以通过${}读取配置文件中的参数-->
    <context:property-placeholder location="classpath*:jdbc.properties"/>

    <!--spring去整合mybatis-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <!--注：driver属性可以省略，会根据url自动推断-->
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>


    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--如果有mybatis的配置文件，需要在这里读取-->
        <property name="configLocation" value="classpath:mybatis.xml"/>
        <!--设置数据源-->
        <property name="dataSource" ref="dataSource"/>
        <!--配置别名-->
        <property name="typeAliasesPackage" value="com.kkb.pojo"/>
        <!--配置映射文件-->
        <property name="mapperLocations" value="com/kkb/mapper/*.xml"/>
        <!--配置插件-->
        <property name="plugins">
            <!--所有的插件都放到array标签里-->
            <array>
                <!--分页插件-->
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>
                            reasonable=true
                        </value>
                    </property>
                </bean>
            </array>
        </property>
    </bean>

    <!-- 映射mybatis的目录 -->
    <!--Mapper接口所在的包名 spring自动查询指定 包下的mapper
    有了MapperScannerConfigurer就不需要我们去为每个映射接口去声明一个bean了。大大提高了开发
    的效率。-->
    <bean id="configurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.kkb.mapper"/>
        <!--注意这里是用的value不是ref-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

    <!--配置事务管理-->
    <tx:annotation-driven transaction-manager="transactionManager"/>
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--配置包扫描-->
    <!--除了controller都在这里扫描-->
    <context:component-scan base-package="com.kkb.mapper; com.kkb.pojo; com.kkb.service"/>
</beans>

3 springmvc.xml

配置的是springmvc的配置文件。该配置文件主要用于controller层的请求分发，因此需要包含以下几个部分：

• 引入mvc命名空间
• 包扫描
• 视图解析器internalResourceViewResolver -> 定义前缀和后缀
• 静态资源处理：<mvc:resources mapping="/js/** location="/js/">
• 文件上传：CommonsMultipartResolver

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

    <!--springmvc的配置文件:控制器的bean对象都在这里扫描-->
    <context:component-scan base-package="com.kkb.controller"/>

    <!--视图解析器-->
    <bean id="internalResourceViewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/pages/"/>
        <property name="suffix" value=".html"/>
    </bean>

    <mvc:annotation-driven/>
    <!--静态资源处理-->
    <mvc:resources mapping="/img/**" location="/img/"/>
    <mvc:resources mapping="/js/**" location="/js/"/>
    <mvc:resources mapping="/css/**" location="/css/"/>
    <mvc:resources mapping="/fonts/**" location="/fonts/"/>
    <mvc:resources mapping="/static/**" location="/static/"/>
    <mvc:resources mapping="/pages/**" location="/pages/"/>
    <!--    <mvc:default-servlet-handler/>-->

    <!--文件上传-->
    <bean id="multipartResolver"
          class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    </bean>
</beans>

细节问题：mapping中的/*和/**之间的区别？

• /**的意思是所有文件夹及里面的子文件夹
• /*是所有文件夹，不含子文件夹

4 web.xml

主要配置两个内容：

• 加载spring配置：总的配置加载，通过<context-param>声明
  • 声明监听器contextLoaderListener
• 加载springmvc配置：声明dispatcherServlet对象。
• 为了实现restful风格的请求，需要声明HiddenHttpServletMethodFilter
• 中文乱码过滤器：CharacterEncodingFilter

细节问题：url-pattern中的/*和/的区别

• / 拦截所有请求 包括静态资源和动态请求 但是不拦截jsp
• /*拦截所有请求 包括静态资源和动态请求 也拦截jsp

区别就在于 / 不拦截jsp /*拦截jsp

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <welcome-file-list>
        <welcome-file>/pages/index.html</welcome-file>
    </welcome-file-list>
    <!--spring的配置-->
    <context-param>
        <!--contextConfigLocation：表示用于加载 Bean的配置文件
        classpath和classpath*区别：
        classpath：只会到你的class路径中查找找文件。
        classpath*：不仅包含class路径，还包括jar文件中（class路径）进行查找。
        -->
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:spring.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--SpringMVC的配置-->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 创建前端控制器的时候读取springmvc配置文件启动ioc容器 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath*:springmvc.xml</param-value>
        </init-param>
        <!-- Tomcat启动就创建此对象 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!-- 配置拦截路径url，所有请求都会被前端控制器拦截处理 -->
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>


    <!-- 使用Rest风格的URI 将页面普通的post请求转为指定的delete或者put请求
    原理：在Ajax中发送post请求后，带_method参数，将其修改为PUT，或者DELETE请求-->
    <filter>
        <filter-name>httpMethodFilter</filter-name>
        <filter-class>
            org.springframework.web.filter.HiddenHttpMethodFilter
        </filter-class>
    </filter>
    <filter-mapping>
        <filter-name>httpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--注册字符集过滤器：post请求中文乱码问题的解决方案-->
    <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>
        <!--强制request使用字符集encoding-->
        <init-param>
            <param-name>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <!--强制response使用字符集encoding-->
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>