快速搭建maven下的ssm web工程

添加pom.xml依赖信息

	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-webmvc</artifactId>
		<version>4.3.7.RELEASE</version>
	</dependency>
	<!-- spring连接jdbc -->
	<dependency>
		<groupId>org.springframework</groupId>
		<artifactId>spring-jdbc</artifactId>
		<version>4.3.7.RELEASE</version>
	</dependency>
	<!-- mysql数据库 -->
	<dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
		<version>5.0.2</version>
	</dependency>
	<!-- spring连接mybatis -->
	<dependency>
		<groupId>org.mybatis</groupId>
		<artifactId>mybatis-spring</artifactId>
		<version>1.3.2</version>
	</dependency>
	<!-- mybais的依赖 -->
	<dependency>
		<groupId>org.mybatis</groupId>
		<artifactId>mybatis</artifactId>
		<version>3.4.6</version>
	</dependency>
	<!-- c3p0连接池 -->
	<dependency>
		<groupId>com.mchange</groupId>
		<artifactId>c3p0</artifactId>
		<version>0.9.5.2</version>
	</dependency>

配置web.xml文件

<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>

<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>

配置applicationContext.xml文件

<?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-4.3.xsd">

	<!-- 扫描com.ssm下的包，除了control层 -->
	<context:component-scan base-package="com.ssm">
		<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
	<!-- 扫描数据文件 -->
	<context:property-placeholder location="classpath:db.properties"/>
	<!-- 配置c3p0数据源 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="user" value="${user}"></property>
		<property name="password" value="${password}"></property>
		<property name="driverClass" value="${driverClass}"></property>
		<property name="jdbcUrl" value="${jdbcUrl}"></property>
	</bean>
	<!-- 配置mybatis -->
	<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<property name="configLocation" value="classpath:mybatis-config.xml"></property>
		<property name="mapperLocations" value="classpath:mapper/*.xml"></property>
	</bean>
	<!-- 扫描dao层 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.ssm.dao"></property>
	</bean>
</beans>

配置springmvc.xml文件

<?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-4.3.xsd">

<!-- spirngmvc只扫描control层就可以了，可以在applicationContext.xml文件中的context:component-scan标签下添加
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
这样spring和springmvc就各司其职了 -->
<context:component-scan base-package="com.ssm">
	<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	<property name="prefix" value="/"></property>
	<property name="suffix" value=".jsp"></property>
</bean>
</beans>

数据库信息文件db.properties,把用户名密码设置成自己的，修改一下数据库名

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

mybatis-config.xml文件

<?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>
</configuration>

实体层

public class User {
	private int id;
	private String name;
	private int age;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	@Override
	public String toString() {
		return "User [id=" + id + ", name=" + name + ", age=" + age + "]";
	}
}

dao层

public interface UserMapper {
	List<User> getUser();
}

dao层映射文件

<?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.ssm.dao.UserMapper">

<select id="getUser" resultType="com.ssm.bean.User">
select * from user
</select>
</mapper>

service层（测试就不写成接口了）

@Service
public class UserService {
	@Autowired
	private UserMapper userMapper;
	public void testSpring() {
		List<User> list = userMapper.getUser();
		for(User user : list) {
			System.out.println(user);
		}
	}
}

control层

@Controller
public class UserController {
	@RequestMapping("test")
	public String test() {
		return "index";
	}
}

index.jsp就不写出来了，这个文件要放在webapp目录下才行