eclipse搭建SSM框架

环境：eclipse 、Tomcat8.5、Maven3.6

1.新建maven项目

2.项目建立后上面有红叉

解决办法：

右键项目-->build path-- >configure and build-->在libraries那一栏下，选择ADD Libarry-->选择server Runtime-->选择tomcat然后finish-->apply然后关闭

3.pom.xml文件添加依赖

<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>wust</groupId>
	<artifactId>SSM</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>SSM Maven Webapp</name>
	<url>http://maven.apache.org</url>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>

		<!-- spring依赖 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>5.0.2.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>5.0.2.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>5.0.2.RELEASE</version>
		</dependency>

		<!-- spring数据库事务处理 tomcat8.5居然不支持5.0.2.RELEASE事务 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>4.3.9.RELEASE</version>
		</dependency>
		<!-- Spring对JDBC数据访问 同样tomcat8.5居然不支持5.0.2.RELEASE -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>4.3.9.RELEASE</version>
		</dependency>

		<!-- springmvc依赖 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>5.0.2.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>

		<!-- json依赖 -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-core</artifactId>
			<version>2.9.3</version>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.9.3</version>
		</dependency>

		<!-- mybatis依赖 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.4.5</version>
		</dependency>
		<!-- mybatis-spring依赖 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.3.1</version>
		</dependency>

		<!-- mysql驱动依赖 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.45</version>
		</dependency>
		<!-- JDBC连接池依赖 -->
		<dependency>
			<groupId>com.mchange</groupId>
			<artifactId>c3p0</artifactId>
			<version>0.9.5.2</version>
		</dependency>
	</dependencies>
	<build>
		<finalName>SSM</finalName>
	</build>
</project>

4.SSM配置：4个配置文件

web.xml配置

<?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"
	version="3.1">
	<!-- 加载spring容器 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:spring/spring-config.xml</param-value>
	</context-param>
	<!-- 加载spring mvc -->
	<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:spring/springmvc-config.xml</param-value>
		</init-param>
	</servlet>
	<servlet-mapping>
		<servlet-name>SpringMVC</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

spring-config.xml配置

<?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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:jdbc="http://www.springframework.org/schema/jdbc"
	xmlns:jee="http://www.springframework.org/schema/jee"
	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/mvc 
	http://www.springframework.org/schema/mvc/spring-mvc.xsd 
	http://www.springframework.org/schema/tx 
	http://www.springframework.org/schema/tx/spring-tx.xsd 
	http://www.springframework.org/schema/aop 
	http://www.springframework.org/schema/aop/spring-aop.xsd">
	
	<!-- 配置数据源(spring接管了mybatis的配置) -->  <!-- c3p0连接池 -->
	<bean id="dataSource"
		class="com.mchange.v2.c3p0.ComboPooledDataSource">  <!-- jdbc:mysql://localhost:3306/testdb -->  <!-- 本地数据库可以省略localhost:3306 -->
		<property name="jdbcUrl" value="jdbc:mysql:///testdb"></property>
		<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
		<property name="user" value="root"></property>
		<property name="password" value="123456"></property>
		<!-- 当连接池中的连接耗尽的时候c3p0一次同时获取的连接数，Default: 3 -->
		<property name="acquireIncrement" value="3"></property> <!-- 初始化时获取连接数，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
		<property name="initialPoolSize" value="10"></property>
		<property name="minPoolSize" value="2"></property>
		<property name="maxPoolSize" value="10"></property>
	</bean>
	
	<!-- sqlSessionFactory配置 (回忆一下mybatis编程，现在由spring注入) -->
	<bean id="sqlSessionFactory"
		class="org.mybatis.spring.SqlSessionFactoryBean">  <!-- 注入数据库连接池 -->
		<property name="dataSource" ref="dataSource" /> <!-- 加载mybatis-config配置 -->
		<property name="configLocation"
			value="classpath:mybatis/mybatis-config.xml"></property>
	</bean>
	
	<!-- 配置mybatis mapper批量扫描 --> <!-- 从basePackage指定的mapper包中扫描mapper类，自动生成bean -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  <!-- 注入sqlSessionFactory -->
		<property name="sqlSessionFactoryBeanName"
			value="sqlSessionFactory" />
		<property name="basePackage" value="mapper" />
	</bean>
	
	<!-- 事务配置（spring接管mybatis事务操作，如事务的提交、回滚、关闭等） -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource" />
	</bean>  
	
	<!-- 使用annotation注解方式配置事务 -->	
	<tx:annotation-driven
		transaction-manager="transactionManager" />
	<!-- 自动扫描配置 --> <!-- 在base-package包中扫描@Service、@Component注解的类， 并把这些类自动注册为bean 备注：@Controller放到spring 
		mvc扫描 -->
	<context:component-scan base-package="service" />
	<context:component-scan base-package="entity" />
</beans>

springmvc-config.xml配置

<?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:p="http://www.springframework.org/schema/p"
	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.xsd">
	<!-- 启用注解映射+json转换器 -->
	<mvc:annotation-driven>
		<mvc:message-converters>
			<bean
				class="org.springframework.http.converter.StringHttpMessageConverter" />
			<bean
				class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" />
		</mvc:message-converters>
	</mvc:annotation-driven>
	<!-- 自动扫描 --> <!-- spring mvc自动扫描base-pack下或子包下的@Controller注解的类，自动注册为bean 注：@Service、@Component一般放到spring配置文件中去扫描 -->
	<context:component-scan
		base-package="controller" />
	<!-- 视图解析路径配置 依赖jstl包 -->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="viewClass"
			value="org.springframework.web.servlet.view.JstlView" />
		<property name="contentType" value="text/html" />
		<property name="prefix" value="/WEB-INF/views/" />
		<property name="suffix" value=".jsp" />
	</bean>
	<!-- 配置静态资源(JS、CSS、图片等)的访问路径 --> <!--对location文件夹下内容的访问将不再被DispatcherServlet拦截 -->
	<mvc:resources mapping="/gif/**" location="/gif/" />
	<mvc:resources mapping="/jquery/**" location="/jquery/" />
</beans>

mybatis-config.xml配置

<?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>
<!-- 原先的配置基本都被spring接管 AOP厉害呀-->
<!-- 别名配置 把entity包中简单类起个别名（如User类的别名就是user） -->  <typeAliases>      <package name="entity"/>    </typeAliases>  
</configuration>

5.将项目添加到tomcat运行没报错就是成功了

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