使用maven构建SSM项目

准备工作

1.下载maven，配置环境变量
2.eclipse中设置本地maven
3.修改eclipse.ini配置文件
4.eclipse修改jre为jkd目录下的jre

创建maven项目

new -> other -> Maven -> Maven Project -> maven-archetype-webapp

pom.xml

<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.ztc</groupId>
  <artifactId>ssmdemo</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>ssmdemo Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <!-- 单元测试 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!-- 日志 -->
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.1.1</version>
    </dependency>
    <!-- 数据库 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.37</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.1.2</version>
    </dependency>
    <!-- mybatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.3.0</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.3</version>
    </dependency>
    <!-- servlet -->
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.5.4</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>
    <!-- spring -->
    <!-- spring核心 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.1.7.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.1.7.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.1.7.RELEASE</version>
    </dependency>
    <!-- spring DAO层 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>4.1.7.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>4.1.7.RELEASE</version>
    </dependency>
    <!-- spring web -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.1.7.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.1.7.RELEASE</version>
    </dependency>
    <!-- spring test -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>4.1.7.RELEASE</version>
    </dependency>
    <!-- redis -->
    <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>2.7.3</version>
    </dependency>
    <dependency>
        <groupId>com.dyuproject.protostuff</groupId>
        <artifactId>protostuff-core</artifactId>
        <version>1.0.8</version>
    </dependency>
    <dependency>
        <groupId>com.dyuproject.protostuff</groupId>
        <artifactId>protostuff-runtime</artifactId>
        <version>1.0.8</version>
    </dependency>
    <!-- Map工具类 -->
    <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
        <version>3.2</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>ssmdemo</finalName>
    <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
  </build>
</project>

补全项目结构

Paste_Image.png

开始编程

先在spring文件夹里新建spring-dao.xml文件
spring-dao.xml文件中主要配置：
1.读取数据库相关的properties文件
2.配置第三方数据库连接池
3.配置SqlSessionFactory对象
4.扫描dao层接口，动态实现dao接口，也就是说不需要daoImpl，sql和参数都写在xml文件上
spring-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"
    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">
    
    <!-- 加载数据库相关参数配置文件 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    
    <!-- 数据库连接池 -->
    <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"/>
        
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <property name="autoCommitOnClose" value="false"/>
        <property name="checkoutTimeout" value="10000"/>
        <property name="acquireRetryAttempts" value="2"/>
    </bean>
    
    <!-- 配置sqlSessionFactory对象 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSoutce" ref="dataSource"/>
        <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!-- 扫描po包 使用别名 -->
        <property name="typeAliasesPackage" value=""/>
        <!-- 扫描sql配置文件:mapper需要的xml文件 -->
        <property name="mapperLocation" value="classpath:mapper/*.xml"/>
    </bean>
    
    <!-- 配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
        <!-- 给出需要扫描Dao接口包 -->
        <property name="basePackage" value="" />
    </bean>
</beans>```
数据库配置相关参数是读取配置文件，所以在resources文件夹里新建一个jdbc.properties文件。
**jdbc.properties**

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=```
配置mybatis核心文件，在recources文件夹里新建mybatis-config.xml文件。

1.使用自增主键
2.使用列别名
3.开启驼峰命名转换 create_time -> createTime
mybatis-config.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>
    <!-- 配置全局属性 -->
    <settings>
        <!-- 使用jdbc的getGeneratedKeys获取数据库自增主键值 -->
        <setting name="useGeneratedKeys" value="true" />

        <!-- 使用列别名替换列名 默认:true -->
        <setting name="useColumnLabel" value="true" />

        <!-- 开启驼峰命名转换:Table{create_time} -> Entity{createTime} -->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>
</configuration>```

在spring文件夹里新建spring-service.xml文件。

1.扫描service包所有注解 @Service
2.配置事务管理器，把事务管理交由spring来完成
3.配置基于注解的声明式事务，可以直接在方法上@Transaction
**spring-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: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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">

<context:component-scan base-package="com.ztc.ssm.service" />

<!-- 配置事务管理器 -->
<bean id="transactionManager"
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <!-- 注入数据库连接池 -->
    <property name="dataSource" ref="dataSource" />
</bean>

<!-- 配置基于注解的声明式事务 -->
<tx:annotation-driven transaction-manager="transactionManager" />

</beans>```

在spring文件夹里新建spring-web.xml文件。

1.开启SpringMVC注解模式，可以使用@RequestMapping，@PathVariable，@ResponseBody等
2.对静态资源处理，如js，css，jpg等
3.配置jsp 显示ViewResolver，例如在controller中某个方法返回一个string类型的"login"，实际上会返回"/WEB-INF/login.jsp"
4.扫描web层 @Controller
spring-web.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/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/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
    <!-- 配置SpringMVC -->
    <!-- 1.开启SpringMVC注解模式 -->
    <!-- 简化配置： 
        (1)自动注册DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter 
        (2)提供一些列：数据绑定，数字和日期的format @NumberFormat, @DateTimeFormat, xml,json默认读写支持 
    -->
    <mvc:annotation-driven />

    <!-- 2.静态资源默认servlet配置
        (1)加入对静态资源的处理：js,gif,png
        (2)允许使用"/"做整体映射
     -->
     <mvc:default-servlet-handler/>

     <!-- 3.配置jsp 显示ViewResolver -->
     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
     </bean>

     <!-- 4.扫描web相关的bean -->
     <context:component-scan base-package="com.ztc.ssm.vo" />
</beans>```
修改web.xml文件了，它在webapp的WEB-INF下。
**web.xml**

<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_3_1.xsd"
version="3.1" metadata-complete="true">


<servlet>
<servlet-name>seckill-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-*.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>seckill-dispatcher</servlet-name>

<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>```

有配置日志xml，在resources文件夹里新建logback.xml文件

logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="true">
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <!-- encoders are by default assigned the type ch.qos.logback.classic.encoder.PatternLayoutEncoder -->
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <root level="debug">
        <appender-ref ref="STDOUT" />
    </root>
</configuration>```

##总结
**pom.xml中配置依赖项：**
单元测试（junit）、日志（log4j）、数据库链接（mysql）、第三方数据库连接池（druid）、spring包（包含springmvc）、mybatis独立包、mybatis-spring整合包、servlet包（taglib/jstl）、json解析、redis、aop、上传文件

**spring-dao.xml：**
配置数据库连接池
配置SqlSessionFactory对象（注入连接池、mapper.xml文件位置、mybatis全局配置文件）
配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中（注入dao接口的位置）

**spring-service.xml:**
配置事务管理器 
配置基于注解的声明式事务
aop、通知、传播行为

**spring-web.xml:**
开启SpringMVC注解模式
配置视图解析器
配置扫描controller
文件上传

**mybatis-config.xml：**
配置settings属性

####github地址：https://github.com/GITFUCKK/mavenSSM1.git