Explication détaillée du code Java pour la construction de la structure du projet springmvc mybatis développé par WeChat

Cet article présente principalement en détail la deuxième étape de la préparation du développement de WeChat, la construction de la structure du projet springmvc et mybatis, qui a une certaine valeur de référence. Les amis intéressés peuvent se référer à la précédente

L'article en parle. comment créer un projet maven dans MyEclipse. Ici, nous continuerons à présenter comment introduire notre framework javaweb-SpringMVC couramment utilisé dans le projet maven de base construit !

①Introduisez les dépendances dans le fichier pom.xml dans le projet maven établi, le code est le suivant :

<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/maven-v4_0_0.xsd">
 <modelVersion>4.0.0</modelVersion>
 <groupId>wechat.cuiyongzhi.com</groupId>
 <artifactId>wechat</artifactId>
 <packaging>war</packaging>
 <version>0.0.1-SNAPSHOT</version>
 <name>wechat</name>
 <url>http://maven.apache.org</url>
 <dependencies>
  <!-- spring -->
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-test</artifactId>
   <version>3.2.0.RELEASE</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-webmvc</artifactId>
   <version>3.2.0.RELEASE</version>
  </dependency>
  <dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-core</artifactId>
   <version>3.2.0.RELEASE</version>
  </dependency>
 
  <!-- mybatis -->
  <dependency>
   <groupId>org.mybatis</groupId>
   <artifactId>mybatis</artifactId>
   <version>3.1.1</version>
  </dependency>
  <dependency>
   <groupId>org.mybatis</groupId>
   <artifactId>mybatis-spring</artifactId>
   <version>1.1.1</version>
  </dependency>
 
  <!-- mysql -->
  <dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <version>5.1.21</version>
  </dependency>
 
  <!-- junit测试 -->
  <dependency>
   <groupId>junit</groupId>
   <artifactId>junit</artifactId>
   <version>4.11</version>
   <scope>test</scope>
  </dependency>
 
  <!-- mysql阿里连接池druid -->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>druid</artifactId>
   <version>0.2.9</version>
  </dependency>
 
  <!-- spring aop包 -->
  <dependency>
   <groupId>org.aspectj</groupId>
   <artifactId>aspectjweaver</artifactId>
   <version>1.7.1</version>
  </dependency>
 
  <!-- json包 -->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>fastjson</artifactId>
   <version>1.2.7</version>
  </dependency>
 
  <!-- 文件上传包 -->
  <dependency>
   <groupId>commons-fileupload</groupId>
   <artifactId>commons-fileupload</artifactId>
   <version>1.2.2</version>
  </dependency>
 
  <!--servlet包 -->
  <dependency>
   <groupId>javax.servlet</groupId>
   <artifactId>servlet-api</artifactId>
   <version>3.0-alpha-1</version>
  </dependency>
 
  <dependency>
   <groupId>javax.servlet.jsp</groupId>
   <artifactId>jsp-api</artifactId>
   <version>2.1</version>
   <scope>provided</scope>
  </dependency>
 
  <dependency>
   <groupId>javax.servlet</groupId>
   <artifactId>jstl</artifactId>
   <version>1.2</version>
  </dependency>
 
  <!-- 日志包 -->
  <dependency>
   <groupId>log4j</groupId>
   <artifactId>log4j</artifactId>
   <version>1.2.17</version>
  </dependency>
 </dependencies>
 <build>
  <finalName>wechat</finalName>
 </build>
</project>

②Modifiez le fichier web.xml sous le chemin du projet comme suit :

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:web="http://java.sun.com/xml/ns/javaee" xmlns="http://java.sun.com/xml/ns/javaee"
 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd
 http://www.springframework.org/schema/websocket http://www.springframework.org/schema/websocket/spring-websocket.xsd"
 id="WebApp_ID" version="3.0">
 <display-name>com.cuiyongzhi.wechat</display-name>
 <context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:spring.xml,classpath:spring-mybatis.xml</param-value>
  <!-- ,classpath:spring-quartz.xml 用于做任务调度 任务定时都可以 -->
 </context-param>
 <context-param>
  <param-name>log4jConfigLocation</param-name>
  <param-value>classpath:log4j.properties</param-value>
 </context-param>
 <listener>
  <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
 </listener>
 <context-param>
  <param-name>spring.profiles.active</param-name>
  <param-value>dev</param-value>
 </context-param>
 <context-param>
  <param-name>spring.profiles.default</param-name>
  <param-value>dev</param-value>
 </context-param>
 <context-param>
  <param-name>spring.liveBeansView.mbeanDomain</param-name>
  <param-value>dev</param-value>
 </context-param>
 <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>
  <init-param>
   <param-name>forceEncoding</param-name>
   <param-value>true</param-value>
  </init-param>
 </filter>
 <listener>
  <description>spring监听器</description>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>
 <!-- 防止内存溢出 -->
 <listener>
  <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
 </listener>
 <servlet>
  <description>spring mvc servlet</description>
  <servlet-name>springMvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <init-param>
   <description>spring mvc 配置文件</description>
   <param-name>contextConfigLocation</param-name>
   <param-value>classpath:spring-mvc.xml</param-value>
  </init-param>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet>
  <servlet-name>interface_url-init_servlet</servlet-name>
  <servlet-class>com.cuiyongzhi.web.start.InterfaceUrlIntiServlet</servlet-class>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>springMvc</servlet-name>
  <url-pattern>/</url-pattern>
 </servlet-mapping>
 
 <welcome-file-list>
  <welcome-file>/index.jsp</welcome-file>
 </welcome-file-list>
 <session-config>
  <session-timeout>300</session-timeout>
 </session-config>
 
 <error-page>
  <error-code>404</error-code>
  <location>/WEB-INF/error/error.jsp</location>
 </error-page>
 
 <error-page>
  <error-code>500</error-code>
  <location>/WEB-INF/error/error.jsp</location>
 </error-page>
 
 <servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>*.css</url-pattern>
 </servlet-mapping>
 
 <servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>*.gif</url-pattern>
 </servlet-mapping>
 
 <servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>*.jpg</url-pattern>
 </servlet-mapping>
 
 <servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>*.js</url-pattern>
 </servlet-mapping>
 
 <servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>*.xhtml</url-pattern>
 </servlet-mapping>
 
 <servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>*.html</url-pattern>
 </servlet-mapping>
 
 <filter>
  <filter-name>DruidWebStatFilter</filter-name>
  <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>
  <init-param>
   <param-name>exclusions</param-name>
   <param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value>
  </init-param>
 </filter>
 <filter-mapping>
  <filter-name>DruidWebStatFilter</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>
 <servlet>
  <servlet-name>DruidStatView</servlet-name>
  <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
  <init-param>
   <!-- 允许清空统计数据 -->
   <param-name>resetEnable</param-name>
   <param-value>true</param-value>
  </init-param>
  <init-param>
   <!-- 用户名 -->
   <param-name>loginUsername</param-name>
   <param-value>cuiyongzhi</param-value>
  </init-param>
  <init-param>
   <!-- 密码 -->
   <param-name>loginPassword</param-name>
   <param-value>123456</param-value>
  </init-param>
 </servlet>
 <servlet-mapping>
  <servlet-name>DruidStatView</servlet-name>
  <url-pattern>/druid/*</url-pattern>
 </servlet-mapping>
 <!-- 访问监控页面：http://ip：port/projectName/druid/index.html -->
 
 <jsp-config>
  <jsp-property-group>
   <display-name>jspConfiguration</display-name>
   <url-pattern>*.jsp</url-pattern>
   <el-ignored>false</el-ignored>
   <scripting-invalid>false</scripting-invalid>
   <include-prelude>/WEB-INF/common/head.jsp</include-prelude>
  </jsp-property-group>
 </jsp-config>
 
</web-app>

③Ajoutez les informations de configuration de la base de données. La base de données configurée ici est MySQL. Créez un nouveau fichier de configuration config.properties sous ressources :

validationQuery=SELECT 1
jdbc_url=jdbc:mysql://127.0.0.1:3306/wechat?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull
jdbc_username=root 
jdbc_password=123456789

④Créez un nouveau fichier de configuration spring sous ressources. .xml, les paramètres sont les suivants :

<?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" xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
 <!-- 引入属性文件 -->
 <context:property-placeholder location="classpath:config.properties" />
 <!-- 自动扫描(自动注入) -->
 <context:component-scan base-package="com.cuiyongzhi.web.service" />
 <context:component-scan base-package="com.cuiyongzhi.wechat.*" /> 
  
</beans>

⑤ Créez un nouveau fichier de configuration spring-mvc.xml sous ressources et définissez-le comme suit :

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-4.0.xsd 
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
 
 <!-- 自动扫描controller包下的所有类，使其认为spring mvc的控制器 -->
 <context:component-scan base-package="com.cuiyongzhi.web.controller" />
 
 <!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
 <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
  <property name="supportedMediaTypes">
   <list>
    <value>text/html;charset=UTF-8</value>
   </list>
  </property>
 </bean>
 
 <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->
 <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
  <property name="messageConverters">
   <list>
    <ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
   </list>
  </property>
 </bean>
 
 <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->
 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/views/" p:suffix=".jsp" />
 
 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
  <property name="defaultEncoding">
   <value>UTF-8</value>
  </property>
  <property name="maxUploadSize">
   <value>32505856</value><!-- 上传文件大小限制为31M，31*1024*1024 -->
  </property>
  <property name="maxInMemorySize">
   <value>4096</value>
  </property>
 </bean>
  
</beans>

⑥ Créez un nouveau fichier de configuration spring-mybatis sous resources .xml, les paramètres sont les suivants :

<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
">
 
 <!-- 配置数据源 -->
 <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
  <property name="url" value="${jdbc_url}" />
  <property name="username" value="${jdbc_username}" />
  <property name="password" value="${jdbc_password}" />
 
  <!-- 初始化连接大小 -->
  <property name="initialSize" value="5" />
  <!-- 连接池最大使用连接数量 -->
  <property name="maxActive" value="100" />
  <!-- 连接池最大空闲 -->
  <property name="maxIdle" value="10" />
  <!-- 连接池最小空闲 -->
  <property name="minIdle" value="0" />
  <!-- 获取连接最大等待时间 -->
  <property name="maxWait" value="60000" />
 
  <property name="poolPreparedStatements" value="true" />
  <property name="maxPoolPreparedStatementPerConnectionSize" value="33" /> 
 
  <property name="validationQuery" value="${validationQuery}" />
  <property name="testOnBorrow" value="false" />
  <property name="testOnReturn" value="false" />
  <property name="testWhileIdle" value="true" />
 
  <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
  <property name="timeBetweenEvictionRunsMillis" value="60000" />
  <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
  <property name="minEvictableIdleTimeMillis" value="25200000" />
 
  <!-- 打开removeAbandoned功能 -->
  <property name="removeAbandoned" value="true" />
  <!-- 1800秒，也就是30分钟 -->
  <property name="removeAbandonedTimeout" value="1800" />
  <!-- 关闭abanded连接时输出错误日志 -->
  <property name="logAbandoned" value="true" />
 
  <!-- 监控数据库 -->
  <!-- <property name="filters" value="stat" /> -->
  <property name="filters" value="mergeStat" />
 </bean>
 
 <!-- myBatis文件 -->
 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <!-- 自动扫描entity目录, 省掉Configuration.xml里的手工配置 -->
  <property name="mapperLocations" value="classpath:com/cuiyongzhi/web/mapping/*.xml" />
 </bean>
 
 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
  <property name="basePackage" value="com.cuiyongzhi.web.dao" />
  <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
 </bean>
 
 <!-- 配置事务管理器 -->
 <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
  <property name="dataSource" ref="dataSource" />
 </bean>
 
 <!-- 注解方式配置事物 -->
 <!-- <tx:annotation-driven transaction-manager="transactionManager" /> -->
 
 <!-- 拦截器方式配置事物 -->
 <tx:advice id="transactionAdvice" transaction-manager="transactionManager">
  <tx:attributes>
   <tx:method name="add*" propagation="REQUIRED" />
   <tx:method name="append*" propagation="REQUIRED" />
   <tx:method name="insert*" propagation="REQUIRED" />
   <tx:method name="save*" propagation="REQUIRED" />
   <tx:method name="update*" propagation="REQUIRED" />
   <tx:method name="modify*" propagation="REQUIRED" />
   <tx:method name="edit*" propagation="REQUIRED" />
   <tx:method name="delete*" propagation="REQUIRED" />
   <tx:method name="remove*" propagation="REQUIRED" />
   <tx:method name="repair" propagation="REQUIRED" />
   <tx:method name="delAndRepair" propagation="REQUIRED" />
   <tx:method name="get*" propagation="SUPPORTS" />
   <tx:method name="find*" propagation="SUPPORTS" />
   <tx:method name="load*" propagation="SUPPORTS" />
   <tx:method name="search*" propagation="SUPPORTS" />
   <tx:method name="datagrid*" propagation="SUPPORTS" />
   <tx:method name="*" propagation="SUPPORTS" />
  </tx:attributes>
 </tx:advice>
 <aop:config>
  <aop:pointcut id="transactionPointcut" expression="execution(* com.cuiyongzhi.web.service..*Impl.*(..))" />
  <aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" />
 </aop:config>
 
 
 <!-- 配置druid监控spring jdbc -->
 <bean id="druid-stat-interceptor" class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
 </bean>
 <bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut" scope="prototype">
  <property name="patterns">
   <list>
    <value>com.cuiyongzhi.web.service.*</value>
   </list>
  </property>
 </bean>
 <aop:config>
  <aop:advisor advice-ref="druid-stat-interceptor" pointcut-ref="druid-stat-pointcut" />
 </aop:config>
 
</beans>

⑦ Créez un nouveau fichier de configuration log4j.properties sous resources, qui est utilisé pour définir le niveau de sortie et l'emplacement de sortie du journal. Les paramètres sont les suivants :

Le fichier de configuration de base de springmvc+mybatis est essentiellement terminé ici Le projet général. La structure est la suivante :

Cet article est principalement basé sur des exemples de code, la construction de base du projet est enregistrée ici. Dans le prochain article, je décrirai brièvement quelques applications simples sous. ce cadre. Merci d'avoir lu. Si vous avez des questions, vous pouvez en discuter !

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