SSM随笔

1.SSM框架的简单配置

1.1 引入jar

c3p0-0.9.1.2.jar	#连接池
com.springsource.org.aopalliance-1.0.0.jar
com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar
commons-logging-1.1.3.jar
jackson-annotations-2.9.8.jar	#json支持
jackson-core-2.9.8.jar			#json支持
jackson-databind-2.9.8.jar		#json支持
mybatis-3.4.1.jar
mybatis-spring-1.3.0.jar
mysql-connector-java-5.1.7-bin.jar  #mysql驱动
spring-aop-4.0.0.RELEASE.jar
spring-aspects-4.0.0.RELEASE.jar
spring-beans-4.0.0.RELEASE.jar
spring-context-4.0.0.RELEASE.jar
spring-core-4.0.0.RELEASE.jar
spring-expression-4.0.0.RELEASE.jar
spring-jdbc-4.0.0.RELEASE.jar
spring-orm-4.0.0.RELEASE.jar
spring-tx-4.0.0.RELEASE.jar
spring-web-4.0.0.RELEASE.jar
spring-webmvc-4.0.0.RELEASE.jar

1.2 web.xml配置文件

1.2.1在工程的classpath下创建两个配置文件

#在src目录下创建
applicationContext.xml
springMvc.xml

1.2.2web.xml的配置

<!-- 配置spring -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!--POST过滤器 -->
<filter>
    <filter-name>encoding</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>encoding</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

<!-- springMVC -->
<servlet>
    <servlet-name>springDispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:springMvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>springDispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

• 注意：/ 和 /*的区别

其中/和/*的区别：
< url-pattern > / </ url-pattern >   会匹配到/login这样的路径型url,不会匹配到*.jsp，即：*.jsp不会进入spring的 DispatcherServlet类 。
< url-pattern > /* </ url-pattern > 会匹配*.jsp，会出现返回jsp视图时再次进入spring的DispatcherServlet 类，导致找不到对应的controller所以报404错。

1.3 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"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

	<!-- 自动扫描包,排除springmvc中的Controller -->
	<context:component-scan base-package="com.pdsu">
		<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
	
	<!-- property引入文件 -->
	<context:property-placeholder location="classpath:jdbc.properties"/>
	
	<!-- c3p0连接池 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
		<property name="user" value="${jdbc.user}"></property>
		<property name="password" value="${jdbc.password}"></property>
		<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
		<property name="driverClass" value="${jdbc.driverClass}"></property>
	</bean>
	
	<!-- 配置数据源事务管理器 -->
	 <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
	 	<property name="dataSource" ref="dataSource"></property>
	 </bean>
	 
	 <!-- 开启基于注解的事物 -->
	 <tx:annotation-driven transaction-manager="transactionManager"/>
	
	<!-- 配置mybatis -->
	<bean class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<property name="configLocation" value="classpath:mybatis.xml"/>
	</bean> 
	 
	 <!-- 配置扫描Mapper包 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.pdsu.dao" />
	</bean>
	
</beans>

1.4 springMvc.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:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

	<!-- 自动扫描包,只扫描Controller -->
	<context:component-scan base-package="com.pdsu" use-default-filters="false">
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>

	<!-- 视图解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="suffix" value=".jsp"></property>
		<property name="prefix" value="/WEB-INF/views/"></property>
	</bean>
	
	<!-- json转换器 -->
	<bean id="jsonMessageConverter"
		class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
	</bean>
	
	<!-- 拦截静态资源 -->
	<mvc:default-servlet-handler/>
	
	<!-- 注解驱动 -->
	<mvc:annotation-driven/>
	
</beans>

1.5 mybatis.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>
	<settings>
		<!-- 开启mybatis的懒加载机制 -->
		<setting name="lazyLoadingEnabled" value="true"/>
		<setting name="aggressiveLazyLoading" value="false"/>
		
		<!-- 转驼峰命名 -->
		
		<!-- 打印sql -->
		<setting name="logImpl" value="STDOUT_LOGGING" />
	</settings>
</configuration>

1.6 jdbc.properties

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/spring4
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=root

2. Mybatis相关配置