利用Maven搭建SSM项目

1.配置pom.xml
在pom.xml中添加需要的spring，hibernate ，数据源和日志所需要的依赖

<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>com</groupId>    <artifactId>login</artifactId>    <packaging>war</packaging>    <version>0.0.1-SNAPSHOT</version>    <name>login Maven Webapp</name>    <url>http://maven.apache.org</url>    <properties>        <!-- 统一源码的编码方式 -->        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <!-- 统一各个框架版本 -->        <struts.version>2.3.24</struts.version>        <spring.version>4.3.8.RELEASE</spring.version>        <hibernate.version>5.1.7.Final</hibernate.version>        <aspectj.version>1.8.10</aspectj.version>        <!-- 数据源 -->        <mysql.version>5.1.42</mysql.version>        <druid.version>1.1.4</druid.version>        <c3p0.version>0.9.5</c3p0.version>        <!--日志 -->        <slf4j.version>1.7.25</slf4j.version>    </properties>    <dependencies>        <!-- servlet -->        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>            <scope>provided</scope>        </dependency>        <!-- Junit依赖 -->        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.12</version>            <scope>test</scope>        </dependency>        <!-- Spring start -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-orm</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.aspectj</groupId>            <artifactId>aspectjweaver</artifactId>            <version>${aspectj.version}</version>        </dependency>        <!-- Spring end -->        <!-- Struts2 start -->        <dependency>            <groupId>org.apache.struts</groupId>            <artifactId>struts2-core</artifactId>            <version>${struts.version}</version>        </dependency>        <!-- Struts2和Spring整合依赖 -->        <dependency>            <groupId>org.apache.struts</groupId>            <artifactId>struts2-spring-plugin</artifactId>            <version>${struts.version}</version>        </dependency>        <!-- Struts2 end -->        <!-- Hibernate start -->        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-core</artifactId>            <version>${hibernate.version}</version>        </dependency>        <!-- Hibernate end -->        <!-- 数据源 start -->        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>${mysql.version}</version>        </dependency>        <dependency>            <groupId>com.mchange</groupId>            <artifactId>c3p0</artifactId>            <version>${c3p0.version}</version>        </dependency>        <dependency>            <groupId>com.alibaba</groupId>            <artifactId>druid</artifactId>            <version>${druid.version}</version>        </dependency>        <!-- 数据源 end -->        <!--日志 start -->        <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-log4j12</artifactId>            <version>${slf4j.version}</version>        </dependency>        <!--日志 end -->    </dependencies></project>

2. 配置log4j.xml
log4j.xml是日志配置文件，可以设置日志打印的级别，和输出日志的目录等配置。有了打印出来的日志我们都可以很精确到出错的位置。

# info 'or'  debuglog4j.rootCategory=info, stdout , R   log4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%nlog4j.appender.R=org.apache.log4j.DailyRollingFileAppenderlog4j.appender.R.File=D:\\logs\\qc.loglog4j.appender.R.layout=org.apache.log4j.PatternLayout1log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%n

日志输出在 D:/logs/qc.l og
3,配置 web.xml
在web.xml配置struts 过滤器，spring监听器等。

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    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_2_5.xsd"    id="WebApp_ID" version="2.5">    <display-name>sht</display-name>    <welcome-file-list>        <welcome-file>index.html</welcome-file>        <welcome-file>index.htm</welcome-file>        <welcome-file>index.jsp</welcome-file>        <welcome-file>default.html</welcome-file>        <welcome-file>default.htm</welcome-file>        <welcome-file>default.jsp</welcome-file>    </welcome-file-list>    <!-- 扩大session作用范围 注意: 任何filter一定要在struts的filter之前调用 -->    <filter>        <filter-name>openSessionInView</filter-name>        <filter-class>org.springframework.orm.hibernate5.support.OpenSessionInViewFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>openSessionInView</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <!-- 配置监听器 -->    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <!-- 指定加载的配置文件 -->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:/spring/applicationContext.xml</param-value>    </context-param>    <!-- struts2核心过滤器 -->    <filter>        <filter-name>struts2</filter-name>        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>struts2</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping></web-app>

4，配置applicationContext.xml
由于在web.xml中配置spring的配置文件加载路径是在classpath中的spring文件夹中，所以我是在resource源目录中创建的spring普通目录。

<?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     ">    <!-- 开启扫描 -->    <context:component-scan base-package="com" />    <!--aop注释 -->    <aop:aspectj-autoproxy proxy-target-class="true" />    <!--hibernate 配置 -->    <import resource="spring-hibernate.xml" />    <!-- 事物管理 -->    <import resource="spring-tx.xml" /></beans>

把hibernate配置和事物管理有分开管理
5，配置spring-hibernate.xml
其中 hibernate.cfg.xml的文件的配置全部交个spring管理。默认用的是mysql数据库

<?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     ">    <!-- 读取db.properties文件 -->    <context:property-placeholder location="classpath:db.properties" />    <!-- 用Spring配置C3P0连接池 -->    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">        <property name="url" value="${jdbc.jdbcUrl}"></property>        <property name="username" value="${jdbc.user}"></property>        <property name="password" value="${jdbc.password}"></property>    </bean>    <!-- 创建SessionFactroy -->    <bean id="sessionFactory"        class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">        <!-- 引入数据源 -->        <property name="dataSource" ref="dataSource"></property>        <!-- 配置关于hibernate的信息 -->        <property name="hibernateProperties">            <props>                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>                <prop key="hibernate.show_sql">true</prop>                <prop key="hibernate.format_sql">true</prop>                <prop key="hibernate.hbm2ddl.auto">update</prop>            </props>        </property>        <!-- 引入映射文件 <property name="annotatedClasses"> <list> <value>com.entity.User</value>             <value>com.aop.SysLog</value> <value>com.entity.LinkMan</value> <value>com.entity.Customer</value>             <value>com.entity.BaseDict</value> <value>com.entity.SaleVisit</value> </list>             </property> -->        <property name="annotatedClasses">            <list>            </list>        </property>    </bean>    <!-- 创建一下HibernateTemplate -->    <bean id="hibernateTemplate" class="org.springframework.orm.hibernate5.HibernateTemplate">        <!-- 注入SessionFactory -->        <property name="sessionFactory" ref="sessionFactory"></property>    </bean></beans>

db.properties里面是数据库的配置信息。注意 它在classpath目录下
db.properties文件内容

jdbc.jdbcUrl=连接地址jdbc.user=数据库账号jdbc.password=数据库密码

6，配置spring-tx.xml
利用springAOP里管理service层的事物

<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     ">    <!-- 关于事务的第一步操作： 配置事务管理器 -->    <bean id="transactionManager"        class="org.springframework.orm.hibernate5.HibernateTransactionManager">        <!-- 注入sessionFactory -->        <property name="sessionFactory" ref="sessionFactory"></property>    </bean>    <!-- 关于事务的第二步操作：开启事务注解 -->    <tx:annotation-driven transaction-manager="transactionManager" />    <!-- AOP配置事物 -->    <tx:advice id="transactionAdvice" transaction-manager="transactionManager">        <tx:attributes>            <tx:method name="find*" propagation="REQUIRED"></tx:method>            <tx:method name="delete*" propagation="REQUIRED"                rollback-for="Exception" />            <tx:method name="save*" propagation="REQUIRED"                rollback-for="Exception" />            <tx:method name="update*" propagation="REQUIRED"                rollback-for="Exception" />            <tx:method name="insert*" propagation="REQUIRED"                rollback-for="Exception" />            <tx:method name="*" propagation="REQUIRED" />        </tx:attributes>    </tx:advice>    <!-- 配置AOP切面 -->    <aop:config>        <aop:pointcut id="transactionPointcut"            expression="execution(*        包名..*.*(..))" />        <aop:advisor pointcut-ref="transactionPointcut"            advice-ref="transactionAdvice" />    </aop:config></beans>

7，配置struts.xml
struts的核心配置文件，默认是在classpath目录下面

<?xml version="1.0" encoding="UTF-8"?>  <!DOCTYPE struts PUBLIC    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"    "http://struts.apache.org/dtds/struts-2.3.dtd"><struts>    <!-- # struts.objectFactory = spring 将action的创建交给spring容器 struts.objectFactory.spring.autoWire         = name spring负责装配Action依赖属性 -->    <constant name="struts.objectFactory" value="spring" />    <constant name="struts.action.extension" value="do,html" />    <package name="hello" namespace="/" extends="struts-default">        <!-- action交给spring创建之后，class的值就不能写action的全路径 而是写在spring中配置Action的ID -->    </package></struts>

从上面配置文件中可以看出struts是交个spring管理的，所以在创建每个action的时候，配置文件的class里面只用写它的bean ID都可以，不用写全路径。
比如用注解的方式在一个action中配置bean ID

@Controller("loginAction")@Scope("prototype")

它的class属性中直接写所对应的bean ID,并且用spring管理action的时候，由于

spring管理的class的对象默认是单例的，因此每个action必须使用原型

    <package name="hello" namespace="/" extends="struts-default">        <!-- action交给spring创建之后，class的值就不能写action的全路径 而是写在spring中配置Action的ID -->        <action name="LoginAction_*" class="loginAction" method="{1}">        <result>/index.jsp</result>        </action>    </package>

8，BaseDao.class
它里面集成一些简单的增删改查和分页，因此这个BaseDao 可以大大减少我们的部分的代码量。把重复的代码提取出来，让其它的类去继承，也更好的体现出 面对对象的思想。

public class BaseDaoImpl<T> extends HibernateDaoSupport implements com.songhongtu.dao.BaseDao<T> {    private Class clazz;// 用于接收运行期泛型类型    public BaseDaoImpl() {    // 获得当前类型的带有泛型类型的父类    ParameterizedType ptClass = (ParameterizedType) this.getClass().getGenericSuperclass();    // 获得运行期的泛型类型    clazz = (Class) ptClass.getActualTypeArguments()[0];    }    public void save(T t) {    getHibernateTemplate().save(t);    }    public void delete(T t) {    getHibernateTemplate().delete(t);    }    public void delete(Serializable id) {    T t = this.getById(id);// 先取,再删    getHibernateTemplate().delete(t);    }    public void update(T t) {    getHibernateTemplate().update(t);    }    public T getById(Serializable id) {    return (T) getHibernateTemplate().get(clazz, id);    }    public Integer getTotalCount(DetachedCriteria dc) {    // 设置查询的聚合函数,总记录数    dc.setProjection(Projections.rowCount());    List<Long> list = (List<Long>) getHibernateTemplate().findByCriteria(dc);    // 清空之前设置的聚合函数    dc.setProjection(null);    if (list != null && list.size() > 0) {        Long count = list.get(0);        return count.intValue();    } else {        return null;    }    }    public List<T> getPageList(DetachedCriteria dc, Integer start, Integer pageSize) {    List<T> list = (List<T>) getHibernateTemplate().findByCriteria(dc, start, pageSize);    return list;    }    public void saveOrUpdate(T t) {    getHibernateTemplate().saveOrUpdate(t);    }}

它的里面的核心代码就是利用泛型，继承它的类必须声明泛型，无参构造器中获取到该类的泛型类型。