springMVC+spring+Mybatis框架搭建(年久失修，沒有價值了)

新入職四天的程序員，在公司搭建ssm框架的踩到的各種坑，所以開始寫博客，記錄點滴。

配置文件

配置文件的存放位置：

• web.xml:按照默認放在/WEB-INF/web.xml
• applicationContext.xml:在java resources下新建一個名爲resources的Source Folder的文件，將spring的配置文件放在該文件夾下
• spring-mvc.xml:同上
• db.properties:同上
• log4j.properties:同上
  配置文件的放置如下圖：
  [外鏈圖片轉存失敗,源站可能有防盜鏈機制,建議將圖片保存下來直接上傳(img-WwzV03ai-1571038372661)(http://homesangsang.com.cn:8080/images/webDevBehand/XiangMuPeiZhiWenJianPath.png)]

• 在web.xml中找到spring系列的配置文件，路徑直接用classpath:filename.xml即在文件名前面加上classpath:

常用配置文件格式

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
	http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" 
	id="WebApp_ID" version="3.1">
	
	
	<!-- 配置spring核心監聽器，默認會以 /WEB-INF/applicationContext.xml作爲配置文件 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<!-- contextConfigLocation參數用來指定Spring的配置文件 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext*.xml</param-value>
	</context-param>
	
	
	<!-- 定義Spring MVC的前端控制器 -->
  <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:springmvc-config.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  
  <!-- 讓Spring MVC的前端控制器攔截所有請求 -->
  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <filter>
  	<filter-name>characterEncodingFilter</filter-name>
  	<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>characterEncodingFilter</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>
  

</web-app>

applicationContext.xml

    <?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" 
	xmlns:mybatis="http://mybatis.org/schema/mybatis-spring"
	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"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
			            http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
			            http://www.springframework.org/schema/context
			            http://www.springframework.org/schema/context/spring-context-4.2.xsd
			            http://www.springframework.org/schema/mvc
			            http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
			            http://www.springframework.org/schema/tx
			            http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
			            http://mybatis.org/schema/mybatis-spring 
			            http://mybatis.org/schema/mybatis-spring.xsd ">
			      
	 <!-- mybatis:scan會將cn.linkcircle.mapper包裏的所有接口當作mapper配置，之後可以自動引入mapper類-->  
    <mybatis:scan base-package="cn.linkcircle.mapper"/>   
       
	 <!-- 掃描cn.linkcircle包下面的java文件，有Spring的相關注解的類，則把這些類註冊爲Spring的bean -->
    <context:component-scan base-package="cn.linkcircle"/>
    
	<!-- 使用PropertyOverrideConfigurer後處理器加載數據源參數 -->
	<context:property-override location="classpath:db.properties"/>

	<!-- 配置c3p0數據源 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"/>
	
	<!-- 配置SqlSessionFactory，org.mybatis.spring.SqlSessionFactoryBean是Mybatis社區開發用於整合Spring的bean -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"
	    p:dataSource-ref="dataSource"/>
	
	<!-- JDBC事務管理器 -->
	<bean id="transactionManager" 
	class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
		 p:dataSource-ref="dataSource"/>
	
	<!-- 啓用支持annotation註解方式事務管理 -->
	<tx:annotation-driven transaction-manager="transactionManager"/>
	
</beans>

springmvc-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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd     
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.2.xsd">
        
    <!-- 自動掃描該包，SpringMVC會將包下用了@controller註解的類註冊爲Spring的controller -->
    <context:component-scan base-package="cn.linkcircle.controller"/>
    <!-- 視圖解析器  -->
     <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
          <property name="prefix" value="/WEB-INF/content/"/>
          <property name="suffix" value=".jsp"/>
    </bean>
    
</beans>

db.priperties

# dataSource.password=root  填寫數據庫密碼，去掉註釋
dataSource.driverClass=com.mysql.jdbc.Driver
dataSource.jdbcUrl=jdbc:mysql://localhost:3306/test
dataSource.user=root
dataSource.maxPoolSize=20
dataSource.maxIdleTime=1000
dataSource.minPoolSize=6
dataSource.initialPoolSize=5

log4j.properties

log4j.rootLogger=DEBUG, Console
log4j.logger.org.mybatis = info
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss}[%c]-[%p]:%m%n