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>
       <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>/*</url-pattern>
   </filter-mapping>

　　b.SpringMVC控制器：Servlet

   <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>
       <load-on-startup>1</load-on-startup>
   </servlet>
   <servlet-mapping>
       <servlet-name>DispatcherServlet</servlet-name>
       <url-pattern>/</url-pattern>
   </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：

 <context:component-scan base-package="cn.bdqn.ssm">
 </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）

 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
     <property name="user" value="betterLearning"></property>
     <property name="password" value="gzh"></property>
     <property name="driverClass" value="oracle.jdbc.driver.OracleDriver"></property>
     <property name="jdbcUrl" value="jdbc:oracle:thin:@localhost:1521:orcl"></property>
 </bean>

　　d. sqlSessionFactory:要从数据源中获取

 <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
     <property name="dataSource" ref="dataSource"></property>
     <property name="typeAliasesPackage" value="cn.web.ssm"></property>
 </bean>

　　e. dao层帮助类：扫描xxxDao.xml，xxxDao.xml作为实现类放入容器中

 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
     <property name="sqlSessionFactoryBeanName" value="sessionFactory"></property>
     <property name="basePackage" value="cn.web.ssm.dao"></property>
 </bean>

　　f. 事务管理：也要从数据源中获取

 <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
     <property name="dataSource" ref="dataSource"></property>
 </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;
    }
}