Detailed explanation of java code for springmvc mybatis project structure developed by WeChat

This article mainly introduces in detail the second step of WeChat development preparation, the construction of springmvc and mybatis project structure, which has certain reference value. Interested friends can refer to the previous one.

The article talks about how to build a maven project in MyEclipse. Here we will continue to introduce how to introduce our commonly used javaweb framework-SpringMVC into the built basic maven project!

①Introduce dependencies into the pom.xml file in the established maven project. The code is as follows:

<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>

②Modify the web.xml file under the project path as follows:

<?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>

③Add database configuration information. The database configured in the project here is MySQL. Create a new config.properties configuration file under resources and set it as follows:

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

④Create a new spring.xml configuration file under resources and set it. As follows:

<?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 Create a new spring-mvc.xml configuration file under resources, and set it as follows:

<?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 Create a new spring-mybatis.xml configuration file under resources, and set it as follows:

<?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>

⑦Create a new log4j.properties configuration file under resources, which is used to set the output level and output location of the log. The settings are as follows:

Go here springmvc+mybatis The basic configuration file is basically completed. The general project structure is as follows:

This article mainly focuses on code examples. The basic project construction is recorded here. Next In this article, I will briefly describe some simple applications under this framework. Thank you for reading. If you have any questions, you can discuss it!

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