配置地狱:SSM框架整合
本文最后更新于:2021年10月14日 下午
JDK 11 + Spring + Spring MVC + MyBatis + Maven + Tomcat 9.0.44 + MySQL 8.0.25 项目配置文件在 IntelliJ IDEA 下的整合。
前言
Maven 严格遵循约定大于配置,不可随意更改 Maven 规定的项目目录结构。
如果使用 Maven 的官方模板创建的 Maven Java Web 项目,直接按照配置文件配置即可。
如果采用在创建普通 Maven 项目后方才导入 Java Web 骨架,Maven导入的Jar包不会被自动添加进项目映射到 Tomcat 的 war 包中,需要手动配置 tomcat war 包的映射。
本文章采用第二种方式配置 SSM 项目。
pom.xml
<?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.rootzwy</groupId>
<artifactId>javaweb-ssm</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<maven.compiler.encoding>UTF-8</maven.compiler.encoding>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>
<dependencies>
<!-- Junit测试 -->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>5.8.1</version>
<scope>test</scope>
</dependency>
<!-- MySQL连接器-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.25</version>
</dependency>
<!-- 数据库连接池 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
<!-- Servlet依赖 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<!-- JSP依赖 -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
<!-- JSP-jstl标签依赖 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.7</version>
</dependency>
<!-- mybatis-spring整合 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<!-- Spring Web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.10</version>
</dependency>
<!-- Spring jdbc管理 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.10</version>
</dependency>
<!-- Spring aop -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.3.10</version>
</dependency>
<!-- 事务切入 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.7</version>
</dependency>
<!-- Jackson -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.13.0</version>
</dependency>
</dependencies>
<!-- 运行时规定maven需要映射的文件 -->
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
</build>
</project>
springContext.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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
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/tx
https://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<import resource="dispatcherServlet-servlet.xml"/>
<!-- 关联数据库配置文件 -->
<context:property-placeholder location="classpath:database.properties"/>
<!--
配置数据库连接池
dbcp:半自动,不能自动连接
c3p0:自动化操作,自动化加载配置文件,并且可以自动设置到对象中
druid:阿里巴巴数据库连接池
hikari:Spring Boot 默认连接池
-->
<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="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!-- 连接数 -->
<property name="maxPoolSize" value="30"/>
<property name="minPoolSize" value="10"/>
<!-- 关闭连接后不自动提交 -->
<property name="autoCommitOnClose" value="false"/>
<!-- 获取连接超时时间 -->
<property name="checkoutTimeout" value="10000"/>
<!-- 连接失败重试次数 -->
<property name="acquireRetryAttempts" value="2"/>
</bean>
<!-- 配置SqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- 绑定Mybatis配置文件 -->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<!-- 配置mapper接口扫描包,动态实现Dao实现对象注入到Spring中,配置之后,默认id为类首字母小写 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<property name="basePackage" value="com.rootzwy.mapper"/>
</bean>
<!-- 扫描service -->
<context:component-scan base-package="com.rootzwy.service"/>
<!-- 配置声明式事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 注入数据源 -->
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 开启事务注解支持 -->
<tx:annotation-driven/>
<!-- 设置事务拦截器 -->
<tx:advice id="transactionInterceptor" transaction-manager="transactionManager">
<tx:attributes>
<!--
propagation标签的事务属性详解:
REQUIRED:支持当前事务,如果当前没有事务,就新建一个事务。这是最常见的选择。
SUPPORTS:支持当前事务,如果当前没有事务,就以非事务方式执行。
MANDATORY:支持当前事务,如果当前没有事务,就抛出异常。
REQUIRES_NEW:新建事务,如果当前存在事务,把当前事务挂起。
NOT_SUPPORTED:以非事务方式执行操作,如果当前存在事务,就把当前事务挂起。
NEVER:以非事务方式执行,如果当前存在事务,则抛出异常。
NESTED:支持当前事务,如果当前事务存在,则执行一个嵌套事务,如果当前没有事务,就新建一个事务。
-->
<tx:method name="*"/>
</tx:attributes>
</tx:advice>
<!-- 设置切入点 -->
<!-- 支持注解设置 -->
<aop:config>
<aop:pointcut id="txPointCut" expression="execution(* com.rootzwy.mapper.*.*(..))"/>
<aop:advisor advice-ref="transactionInterceptor" pointcut-ref="txPointCut"/>
</aop:config>
</beans>
dispatcherServlet-servlet.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: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">
<!-- 启动mvc注解支持 -->
<mvc:annotation-driven/>
<!-- 静态资源过滤 -->
<mvc:default-servlet-handler/>
<!-- controller包扫描 -->
<context:component-scan base-package="com.rootzwy.controller"/>
<!-- 配置视图解析器 -->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
mybatis-config.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>
<settings>
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<!-- 对包下的类起别名 -->
<typeAliases>
<package name="com.rootzwy.pojo"/>
</typeAliases>
<mappers>
<!--<mapper resource="mapper/BookMapper.xml"/>-->
</mappers>
</configuration>
web.xml
<?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">
<!-- Spring DispatcherServlet -->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<!-- 由于servlet要访问Spring容器下的一系列bean,因此需关联两个Context文件 -->
<param-value>classpath:applicationContext.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>
<!-- Spring 乱码过滤 -->
<filter>
<filter-name>encodingFilter</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>encodingFilter</filter-name>
<!-- /*过滤包括jsp在内的所有Servlet -->
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- session生命周期 -->
<session-config>
<!-- 分钟 -->
<session-timeout>20</session-timeout>
</session-config>
</web-app>