SSM整合——從零開始建立SSM
阿新 • • 發佈：2020-11-14
建立Maven專案
匯入常用依賴
<!-- junit,jdbc,連線池,mybatis,mybatis-spring,spring,servlet,jsp,fileunload,lombok--> <dependencies> <!-- Junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!-- 資料庫驅動--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.22</version> </dependency> <!-- 連線池--> <!-- https://mvnrepository.com/artifact/com.mchange/c3p0 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!-- mybatis--> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.3</version> </dependency> <!-- mybatis-spring--> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.5</version> </dependency> <!-- servlet--> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> </dependency> <!-- jsp--> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.3.3</version> </dependency> <!-- jstl--> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl --> <dependency> <groupId>javax.servlet.jsp.jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- spring-core--> <!-- https://mvnrepository.com/artifact/org.springframework/spring-core --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>5.2.9.RELEASE</version> </dependency> <!-- webmvc--> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.9.RELEASE</version> </dependency> <!-- spring-jdbc--> <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.2.9.RELEASE</version> </dependency> <!-- lombok--> <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.16</version> </dependency> <!-- gson--> <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson --> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.5</version> </dependency> <!-- aop依賴--> <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.6</version> </dependency> <!-- fileupload--> <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.3</version> </dependency> </dependencies>
匯入依賴之後，等maven下載完畢，在專案結構下的Artifacts建立lib資料夾，將maven中所有的包手動新增到lib下，不新增的話，後續整合到springMVC時會找不到對應包。
根據自己的資料庫，建立對應的實體類
@Data @NoArgsConstructor @AllArgsConstructor public class Admin { private Integer a_id; private String a_username; private String a_password; private String a_name; private String a_phone; private String a_power; private String a_describe; } ········
整合MyBatis
建立資料庫配置檔案
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/dormitory?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
jdbc.username=root
jdbc.password=root
建立mybatis-config.xml,有一些基礎配置（如：駝峰命名、日誌輸出、別名），繫結mapper
<?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> <!-- 標準日誌工廠--> <setting name="logImpl" value="STDOUT_LOGGING"/> <!-- <setting name="logImpl" value="LOG4J"/>--> </settings> <!--每個mapper都需要註冊--> <mappers> <!-- 每一個Dao介面都需要一個mapper對應--> <mapper resource="mapper/adminmapper.xml"/> </mappers> </configuration>
建立spring-dao.xml,做一些連線池（c3p0）、DataSource、SqlSessionFactory、Dao介面自動注入的配置，並且繫結mybatis-config.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:c="http://www.springframework.org/schema/c"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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">
<!-- 引入資料庫檔案-->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置連線池-->
<bean class="com.mchange.v2.c3p0.ComboPooledDataSource" id="dataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!--<!– 最大連線池大小–>-->
<!-- <property name="maxPoolSize" value="30"/>-->
<!--<!– 最小連線池大小–>-->
<!-- <property name="minPoolSize" value="10"/>-->
<!--<!– –>-->
<!-- <property name="autoCommitOnClose" value="false"/>-->
<!--<!– 最大連線時長–>-->
<!-- <property name="maxConnectionAge" value="10000"/>-->
<!--<!– 失敗重試次數–>-->
<!-- <property name="acquireRetryAttempts" value="2"/>-->
</bean>
<!-- SqlSessionFactory-->
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<!--<!– SqlSession–>-->
<!-- <bean class="org.mybatis.spring.SqlSessionTemplate" id="sqlSession">-->
<!-- <constructor-arg index="0" ref="sqlSessionFactory"/>-->
<!-- </bean>-->
<!-- 配置dao介面掃描包，自動注入到spring容器，不用手動寫Bean注入-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 注入sqlSessioFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!-- 要掃描包-->
<property name="basePackage" value="com.lh.dao"/>
</bean>
</beans>
整合Services層
建立spring-services.xml檔案，用於繫結services層所有類，併為業務邏輯增添事務管理器
<?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:c="http://www.springframework.org/schema/c"
xmlns:p="http://www.springframework.org/schema/p"
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
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/aop
https://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
https://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 掃描services-->
<context:component-scan base-package="com.lh.services"/>
<!-- 注入services所有類-->
<bean class="com.lh.services.impl.AdminServicesImpl" id="adminServices">
<property name="adminMapper" ref="adminMapper"/>
</bean>
<!-- 服務層應該有事務管理-->
<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="transactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--AOP織入事務管理器-->
<tx:advice transaction-manager="transactionManager" id="txTransactionManager">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="pointcut" expression="execution(* com.lh.services.*.*(..))"/>
<aop:advisor advice-ref="txTransactionManager" pointcut-ref="pointcut"/>
</aop:config>
</beans>
為maven專案增加web支援
整合springMVC
建立spring-mvc.xml,為其配置靜態資源過濾器、註解驅動、檢視解析器、包掃描
<?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:c="http://www.springframework.org/schema/c"
xmlns:p="http://www.springframework.org/schema/p"
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">
<!-- 包掃描-->
<context:component-scan base-package="com.lh.controller"/>
<!-- 註解驅動,解決響應亂碼-->
<mvc:annotation-driven/>
<!-- 靜態資源過濾器-->
<mvc:default-servlet-handler/>
<!-- 檢視解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
在web.xml中，增加DispatcherServlet(將web專案交給spring管理，請求到達首先經過此servlet分發)、編碼過濾器
<?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">
<!-- 配置Dispatcherservlet-->
<servlet>
<servlet-name>springmvc</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>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 亂碼過濾器-->
<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>
</web-app>
建立applicationContext.xml，關聯spring-dao.xml,spring-services.xml,spring-mvc.xml檔案，成為一個完整的ssm專案
<?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:c="http://www.springframework.org/schema/c"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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">
<import resource="classpath:spring-dao.xml"/>
<import resource="classpath:spring-services.xml"/>
<import resource="classpath:spring-mvc.xml"/>
<!-- GSON注入-->
<bean id="gson" class="com.google.gson.Gson"/>
<!-- 檔案上傳下載-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="utf-8"/>
<property name="maxUploadSize" value="102400000"/>
<property name="maxInMemorySize" value="40960"/>
</bean>
</beans>