简单Web项目搭建：
一.流程
1. 导包
n个springMVC；
2个mybatis<其中一个是mybatis-spring>；
3个jackson包；
2. xml配置
web.xml和applicationContext.xml
3. 建包，建接口，建类
4. 建jsp
二：具体分说
1. XML配置：
1.1 web.xml配置：
字符编码器和SpringMVC控制器
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name></display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name> <url-pattern>*.do</url-pattern> </filter-mapping> <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>DispatcherServlet</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> </web-app>
a.字符编号器 :filter
1 <filter> 2 <filter-name>CharacterEncodingFilter</filter-name> 3 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> 4 <init-param> 5 <param-name>encoding</param-name> 6 <param-value>utf-8</param-value> 7 </init-param> 8 </filter> 9 <filter-mapping> 10 <filter-name>CharacterEncodingFilter</filter-name> 11 <url-pattern>/*</url-pattern> 12 </filter-mapping>
b.SpringMVC控制器：Servlet
1 <servlet> 2 <servlet-name>DispatcherServlet</servlet-name> 3 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 4 <init-param> 5 <param-name>contextConfigLocation</param-name> 6 <param-value>classpath:applicationContext.xml</param-value> 7 </init-param> 8 <load-on-startup>1</load-on-startup> 9 </servlet> 10 <servlet-mapping> 11 <servlet-name>DispatcherServlet</servlet-name> 12 <url-pattern>/</url-pattern> 13 </servlet-mapping>
1.2 applicationContext.xml配置:
注解扫描、mvc驱动、数据源、sqlSessionFactory、dao层帮助类、事务管理、事务驱动（没有先后顺序）
<?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:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd "> <context:component-scan base-package="cn.bdqn.ssm"></context:component-scan> <mvc:annotation-driven></mvc:annotation-driven> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="jdbcUrl" value="jdbc:oracle:thin:@localhost:1521:orcl"></property> <property name="driverClass" value="oracle.jdbc.driver.OracleDriver"></property> <property name="user" value="tb28"></property> <property name="password" value="accp"></property> </bean> <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="typeAliasesPackage" value="cn.web.ssm" ></property> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="sqlSessionFactoryBeanName" value="sessionFactory"></property> <property name="basePackage" value="cn.web.ssm.dao"></property> </bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <tx:annotation-driven transaction-manager="transactionManager"/> </beans>
a. 注解扫描：
1 <context:component-scan base-package="cn.bdqn.ssm"> 2 </context:component-scan>
b. mvc驱动：
<mvc:annotation-driven></mvc:annotation-driven>
c. 数据源:看导入的jdbc及数据库的包:本次是 c3p0，ojdbc(Oracle数据库）
1 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> 2 <property name="user" value="betterLearning"></property> 3 <property name="password" value="gzh"></property> 4 <property name="driverClass" value="oracle.jdbc.driver.OracleDriver"></property> 5 <property name="jdbcUrl" value="jdbc:oracle:thin:@localhost:1521:orcl"></property> 6 </bean>
d. sqlSessionFactory:要从数据源中获取
1 <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 2 <property name="dataSource" ref="dataSource"></property> 3 <property name="typeAliasesPackage" value="cn.web.ssm"></property> 4 </bean>
e. dao层帮助类：扫描xxxDao.xml，xxxDao.xml作为实现类放入容器中
1 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 2 <property name="sqlSessionFactoryBeanName" value="sessionFactory"></property> 3 <property name="basePackage" value="cn.web.ssm.dao"></property> 4 </bean>
f. 事务管理：也要从数据源中获取
1 <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 2 <property name="dataSource" ref="dataSource"></property> 3 </bean>
g. 事务驱动：
<tx:annotation-driven transaction-manager="transactionManager"/>
三、建包、建接口、建类（展示部分）
流程：entity--dao--service(包括serviceImpl)--controller
a. entity包：Ticket.java
package cn.web.ssm.entity; public class Ticket { private Integer id; private String company; private Double price; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getCompany() { return company; } public void setCompany(String company) { this.company = company; } public Double getPrice() { return price; } public void setPrice(Double price) { this.price = price; } @Override public String toString() { return "Ticket [id=" + id + ", company=" + company + ", price=" + price + "]"; } }
b. dao包：TicketDao.xml和TicketDao.java;
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "http://mybatis.org/dtd/mybatis-3-mapper.dtd" "mybatis-3-mapper.dtd" > <mapper namespace="cn.web.ssm.dao.TicketDao"> <select id="getTicketsById" resultType="Ticket"> select t.id id,t.sell_company company,t.ticket_price price from flight_tickets t where t.flight_id=#{id} </select> </mapper>
package cn.bdqn.ssm.dao; import java.util.List; import cn.web.ssm.entity.Ticket; public interface TicketDao { List<Ticket> getTicketsById(Integer id); }
c. service包：TicketService.java和TicketServiceImpl.java
package cn.web.ssm.service; import java.util.List; import cn.web.ssm.entity.Ticket; public interface TicketService { List<Ticket> getTicketsById(Integer id); }
package cn.web.ssm.service; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import cn.web.ssm.dao.TicketDao; import cn.web.ssm.entity.Ticket; @Service @Transactional public class TicketServiceImpl implements TicketService { @Autowired private TicketDao ticketDao; public void setTicketDao(TicketDao ticketDao) { this.ticketDao = ticketDao; }
public List<Ticket> getTicketsById(Integer id) { return ticketDao.getTicketsById(id); } }
d.controller包：TicketController.java;
package cn.web.ssm.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import cn.web.ssm.entity.Ticket; import cn.web.ssm.service.TicketService; @Controller public class TicketController { @Autowired private TicketService ticketService; public void setTicketService(TicketService ticketService) { this.ticketService = ticketService; } @RequestMapping("showTicket") @ResponseBody public List<Ticket> showTicket(Integer id) { List<Ticket> tickets = ticketService.getTicketsById(id); for (Ticket ticket : tickets) { System.out.println(ticket); } return tickets; } }