ssm框架整合搭建流程
阿新 • • 發佈：2020-11-05
剛學完Mybatis，Spring，SpringMVC
嘗試進行一個整合開發，記錄一下搭建流程
1.環境與開發工具
IDEA
MySQL8.0.16
Tomcat 9.0.21
Maven 3.6.1
2.專案準備
1.建立一個maven工程
2.依賴注入
<dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.16</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.2.1</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.2.8.RELEASE</version> </dependency> </dependencies>
3.配置靜態資源匯出
<build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> </build>
4.連線資料庫
這裡可能連線失敗報錯[08001] Could not create connection to database server. Attempted reconnect 3 times. Giving up.
是因為系統預設的時區與IDEA連線資料庫的時區 (MySQL預設時區為UTC) 不一致
按照格林威治的時間，我們屬於東八區時間，領先UTC八個小時，所以說存在8小時的時差，需要修改
MySQL 8.0以上才存在此問題，如使用的是MySQL 5.7可以忽略
3.編寫配置檔案
1.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <import resource="classpath:spring-dao.xml"/> <import resource="classpath:spring-service.xml"/> <import resource="classpath:spring-mvc.xml"/> </beans>
2.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> <typeAliases> <package name="xxx.pojo"/> </typeAliases> <mappers> <mapper class="xxx.dao.xxxMapper"/> </mappers> </configuration>
3.database.properties
4.編寫Mybatis層
1.與資料表對應的簡單實體類(pojo)
2.與各實體類對應的Mapper介面(dao)
3.各介面的實現類(service)
5.Spring整合dao層
1.關聯資料庫配置檔案(database.properties)
<context:property-placeholder location="classpath:database.properties"/>
2.連線池
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driver" value="${jdbc.driver}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean>
這裡使用的是Druid，也可以使用c3p0、dbcp等
3.sqlSessionFactory
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean>
4.配置dao介面掃描包，動態實現dao介面注入到Spring容器
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <property name="basePackage" value="com.initial.dao"/> </bean>
6.Spring整合Service層
1.掃描service下的包
<context:component-scan base-package="com.initial.service"/>
2.將業務類注入Spring(可註解實現)
3.宣告式事務配置
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"/> </bean>
7.整合SpringMVC
1.給maven專案增加web支援
2.在web.xml配置DispathcherServlet
<servlet> <servlet-name>spring-mvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring-mvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
3.配置亂碼過濾
<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> <url-pattern>/*</url-pattern> </filter-mapping>
注意：/和/*的區別，前者不會掃描.jsp檔案，後者會。所以過濾器這裡需要寫/*，而DispathcherServlet核心分發器是/。
4.設定session過期時間
<session-config> <session-timeout>15</session-timeout> </session-config>
5.配置spring-mvc.xml(處理器對映器、處理器介面卡、檢視解析器)
其中，處理器對映器和處理器介面卡在使用了註解驅動的情況下可以省略
<!--註解驅動--> <mvc:annotation-driven/> <!--靜態資源過濾--> <mvc:default-servlet-handler/> <!--掃描controller--> <context:component-scan base-package="com.initial.controller"/> <!--檢視解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean>