Mybatis+SpringMVC的项目环境搭建

一、web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>ssm</display-name>
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring.xml</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <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:springMVC.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>springMVC</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <filter>
    <filter-name>PostEncoding</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>PostEncoding</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <filter>
    <filter-name>changMethod</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>changMethod</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
  <display-name>MIPO_CRM</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

二、jdbc.properties（Mysql）

#config
mySQLdriver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/crm
user=root
pwd=

三、spring.xml

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    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/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<!-- 扫包 -->        
<context:component-scan base-package="com.wql.service"/>
<context:component-scan base-package="com.wql.dao"/>

<!-- 引用jdbc.properties -->
<context:property-placeholder location="classpath:jdbc.properties"/>

<!-- 配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="${mySQLdriver}"/>
      <property name="url" value="${url}"/>
      <property name="username" value="${user}"/>
      <property name="password" value="${pwd}"/>
</bean>

<!--获取sqlSesssionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" >
   <property name="dataSource" ref="dataSource"/>
   <property name="mapperLocations" value="classpath:com/wql/vo/*.xml"/>
   <property name="typeAliasesPackage" value="com.wql.vo"/>
</bean>

<!-- 获取SqlSessionTemplate -->
<bean class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg ref="sqlSessionFactory"></constructor-arg>
</bean>


<!-- 上传文件拦截，设置最大上传文件大小   10M=10*1024*1024(B)=10485760 bytes -->  
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
    <property name="maxUploadSize" value="10485760" />  
</bean>

<!-- 事务管理器  -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
   <property name="dataSource" ref="dataSource" />
</bean>

<!-- 使用事务的注解模式 -->
<tx:annotation-driven transaction-manager="transactionManager"/>


</beans>

四、springMVC.xml

<?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"
    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-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

<!-- 扫包 -->
<context:component-scan base-package="com.jun.controller"/>

<!-- 视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/views/"/>
      <property name="suffix" value=".jsp"/>
</bean>

<!-- 访问静态资源 使用tomcat的默认的servlet-->
<mvc:annotation-driven/>

<mvc:resources location="/images/" mapping="/images/**"/>
<mvc:resources location="/imgs/" mapping="/imgs/**"/>
<mvc:resources location="/img/" mapping="/img/**"/>
<mvc:resources location="/css/" mapping="/css/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<mvc:resources location="/easyui/" mapping="/easyui/**"/>
<mvc:resources location="/My97DatePicker/" mapping="/My97DatePicker/**"/>

</beans>

下面贴一下模型层、服务层代码，看一下在模型层是如何通过注解模式获取spring.xml中的SqlSessionFactory实例的以及在服务层如何通过注解模式达到事务配置的。

1.模型层

BaseDaoImpl.java  从下面代码可看出在BaseDaoImpl类中是通过@Autowired标识符装载spring.xml中的SqlSessionFactory实例的。

public class BaseDaoImpl<T>  {
    
    
    private Class clazz;
    
    public BaseDaoImpl(){
        ParameterizedType type = (ParameterizedType)this.getClass().getGenericSuperclass();
        clazz = (Class)type.getActualTypeArguments()[0];
    }
    
    @Autowired
    protected SqlSessionTemplate session;
    
    /**
     * 添加
     * @param obj
     */
    public boolean insert(Object obj){
        return session.insert(clazz.getName()+".insert" , obj)>0;
    }
    
    /**
     * 修改
     */
    public boolean update(Object obj){
        return session.update(clazz.getName()+".update",obj)>0;
    }
    
    /**
     * 删除
     */
    public boolean delete(Serializable id){
        return session.delete(clazz.getName()+".delete",id)>0;
    }
    
    
    /**
     * findbyId
     */
    public T findById(Serializable id){
        return session.selectOne(clazz.getName()+".findById", id);
    }
    /**
     * findAll
     */
    public List<T> findAll(Map map){
        return session.selectList(clazz.getName()+".findAll", map);
    }
    /**
     * list
     * @return
     */
    public List<T> list(){
        return session.selectList(clazz.getName()+".list");
    }
    
    /**
     * 分页
     * @param curPage 当前页
     * @param pageRows 每页的条数
     * @param map
     * @return
     */
    public Page getPageData(long curPage , long pageRows ,Map map){
        Page page = new Page();
        
        long count = session.selectOne(clazz.getName()+".getCount",map);//获取数据的总条数
        long allPage = (count+pageRows -1)/pageRows;//根据每页的行数+总条数获取总页数
        
        //设置当前页
        if(curPage < 1)curPage = 1;//如果当前页小于1则设当前页的值为1
        if(allPage > 0 && curPage > allPage ) curPage = allPage;//如果当前页大于总页数则设当前页为总页数
        
        map.put("start", (curPage -1)* pageRows);//设置查询的起始值
        map.put("stop", pageRows);//设置返回的最大条数——即每页的行数
        
        //获取数据
        List<T> dataList = session.selectList(clazz.getName()+".getDataList",map);
        page.setCurPage(curPage);//当前页
        page.setPageRows(pageRows);//每页的行数
        page.setPageNum(allPage);//总页数
        page.setDataList(dataList);//数据
        
        return page;
    }
    
}

OrdergoodDaoImpl.java

@Repository
public class OrdergoodDaoImpl extends BaseDaoImpl<Ordergood>{
    
    /**
     * 显示所有订单商品表（根据id查询）
     * @return
     */
    public List<Ordergood> listOrdergood(Map map){
        return super.findAll(map);
    }
    
    /**
     * 添加订单商品表
     * @param ordergoods
     * @return
     */
    public boolean addOrdergood(List<Ordergood> ordergoods){
        return session.insert(Ordergood.class.getName()+".addOrdergood", ordergoods)>0;
    }
    
}

2.服务层

FunctionService.java  从下面代码可看出在服务层是通过@Transactional标识符来配置事务的。

@Service
@Transactional
public class FunctionService {

    @Autowired
    private FunctionDaoImpl functionDao;
    /**
     * 所有的权限
     * @return
     */
    public List<Function> listFunction(){
        return functionDao.listFunction();
    }
    /**
     * 父权限查询
     * @param map
     * @return
     */
    public List<Function> listParentFunction(){
        return functionDao.listParentFunction();
    }
    /**
     * 子权限查询
     * @param map
     * @return
     */
    public List<Function> listChildFunction(int parentid){
        return functionDao.listChildFunction(parentid);
    }
}