SpringMVC+Mybatis学习

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"?>
<beansxmlns="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.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-3.1.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsdhttp://www.springframework.org/schema/mvchttp://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;}@Overridepublic 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 pricefrom 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 {@Autowiredprivate 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 {@Autowiredprivate TicketService ticketService;public void setTicketService(TicketService ticketService) {this.ticketService = ticketService;}@RequestMapping("showTicket")@ResponseBodypublic List<Ticket> showTicket(Integer id) {List<Ticket> tickets = ticketService.getTicketsById(id);for (Ticket ticket : tickets) {System.out.println(ticket);}       return tickets;}
}