SSM框架的搭建（学习笔记）

1： 创建项目
勾选webApplication会自动配置tomcat服务器

新建项目命名之后，点finish

1.1：配置tomcat

服务器路径（application context：改成/）
将热部署都改为update classes and resource，目的是为了在更新jsp的时候不用重启tomcat服务器

tomcat8.0以上需要再web.xml中加< absolute-ordering/>
不然会报错：More than one fragment with the name [spring_web] was found 翻译过来就是：找到多个名称spring_web片段。
tomcat默认是用的相对路径去寻找spring-web-4.1.0.RELEASE.jar和spring-web-4.1.0.RELEASE-sources.jar里面的META-INF目录下的一个web-fragment文件(解压jar包可见)，关键在于它们都一样。相对地址都是META-INF/spring_web。所以这里web.xml中加< absolute-ordering/>是用绝对路径去寻找web-fragment文件，寻找的时候各自前面都带有了jar包的名称，所以就能够区分它们的位置。
1.2：启动服务器
若能正常启动的话说明tomcat服务器正常

2.创建各个文件存放相应的文件
2.1.先导入相应的jar包
2.2. 创建接口（UserMapper）
在mapper文件夹中创建UserMapper接口。
2.3.创建mapper映射xml配置（mybatis子配置文件）
与UserMapper同名
namespace必须要是对应接口的类的全限定类名路径，例如namespace：com.colin.mapper.UserMapper

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.colin.mapper.UserMapper">

</mapper>

2.4 mybatis主配置文件（别名（类的首字母小写））

<?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>
//为bean文件夹下的类起别名，别名为类的首字母小写
    <typeAliases>
        <package name="com.colin.bean"/>
    </typeAliases>
</configuration>

2.5.springconfig
applicationContext-dao.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:aop="http://www.springframework.org/schema/aop"
       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.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!-- 配置 读取properties文件 db.properties -->
    <context:property-placeholder 	location="classpath:resource/db.properties"/>
    <!-- 自动扫描所有的注解 -->
    <context:component-scan base-package="com.colin"/>
    <!--配置c3p0数据源-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <!-- 配置SqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 设置数据源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 设置MyBatis核心配置文件 就是mybatis主配置文件-->
        <property name="configLocation" value="classpath:resource/mybatisconfig/mybatis-config.xml"/>
        <!-- 设置扫描mapper.xml文件 就是扫描mapper映射文件-->
        <property name="mapperLocations" value="classpath:resource/mapperxmlconfig/*Mapper.xml"/>
    </bean>

    <!-- 配置Mapper层java类扫描 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 设置Mapper扫描包 -->
        <property name="basePackage" value="com.colin.mapper" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>
</beans>

classpath：相当于是src根目录
使用c3p0数据源（只有其jar包）
property-placeholder 的作用： https://www.jianshu.com/p/933ceb4adb1c
applicationContext-service.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:aop="http://www.springframework.org/schema/aop"
       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.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--    配置service扫描-->
    <context:component-scan base-package="com.colin.service"/>
</beans>

applicationContext-transaction.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:aop="http://www.springframework.org/schema/aop"
       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.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop.xsd">
<!--    配置service扫描-->
    <context:component-scan base-package="com.colin.service"/>
</beans>

```java
<?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:aop="http://www.springframework.org/schema/aop" 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.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!--添加spring-dao层配置文件-->
    <import resource="applicationContext-dao.xml"/>
    <!-- 事务管理器 管理的就是数据源-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 数据源 -->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 事务模板对象 -->
    <bean name="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
        <property name="transactionManager" ref="transactionManager"/>
    </bean>

    <!-- 通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 以方法为单位,指定方法应用什么事务属性
             isolation:隔离级别
             propagation:传播行为
             read-only:是否只读-->
            <tx:method name="save*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="add*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="persist*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="update*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="modify*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="delete*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="remove*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
            <tx:method name="get*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/>
            <tx:method name="find*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/>
            <tx:method name="transfer" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
        </tx:attributes>
    </tx:advice>

    <!-- 切面 -->
    <aop:config>
        <aop:pointcut id="txpc" expression="execution(* com.colin.service.impl.*.*(..))"/>
        <!-- 配置切面 : 通知+切点
            advice-ref:通知的名称
            pointcut-ref:切点的名称
        -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txpc"/>
    </aop:config>
</beans>

3.springmvcconfig
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:aop="http://www.springframework.org/schema/aop"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!-- 配置Controller扫描 -->
    <context:component-scan base-package="com.colin.controller" />

    <!-- 配置注解驱动 -->
    <mvc:annotation-driven />

    <!-- 配置视图解析器 -->
    <bean  class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/" />
        <!-- 后缀 -->
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/jdbc2019?characterEncoding=utf-8
jdbc.username=root
jdbc.password=sudi

log4j.properties

# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

3.web.xml

<?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">
    <absolute-ordering/>
    <!--配置项目启动的时候加载spring的相关配置文件-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:resource/springconfig/applicationContext-*.xml</param-value>
    </context-param>
    <!--配置监听器加载spring-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--配置过滤器，解决post乱码问题-->
    <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>
    <!--配置springmvc-->
    <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:resource/springmvcconfig/springmvc.xml</param-value>
        </init-param>
        <!-- 配置springmvc什么时候启动，参数必须为整数 -->
        <!-- 如果为0或者大于0，则springMVC随着容器启动而启动 -->
        <!-- 如果小于0，则在第一次请求进来的时候启动 -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

此博客供自己参考。