Spring+SpringMVC+mybatis整合以及注解的使用

1.包结构:

 2.spring配置:基本的DAO配置以及扫描Mapper(扫描出来的Mapper为首字母小写)

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
 4     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
 5     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 6     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
 7     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
 8     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
 9     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
10
11
12     <context:property-placeholder location="classpath:db.properties"/>
13
14     <!-- 数据库连接池 -->
15     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
16         destroy-method="close">
17         <property name="driverClassName" value="${jdbc.driver}" />
18         <property name="url" value="${jdbc.url}" />
19         <property name="username" value="${jdbc.username}" />
20         <property name="password" value="${jdbc.password}" />
21         <property name="maxActive" value="10" />
22         <property name="maxIdle" value="5" />
23     </bean>
24
25     <!-- Mybatis的工厂 -->
26     <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
27         <property name="dataSource" ref="dataSource"/>
28         <!-- 核心配置文件的位置 -->
29         <property name="configLocation" value="classpath:sqlMapConfig.xml"/>
30     </bean>
31
32     <!-- Mapper动态代理开发   扫描 -->
33     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
34         <!-- 基本包 -->
35         <property name="basePackage" value="cn.qlq.springmvc.mapper"/>
36     </bean>
37
38     <!-- 注解事务 -->
39     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
40         <property name="dataSource" ref="dataSource"/>
41     </bean>
42
43     <!-- 开启注解 -->
44     <tx:annotation-driven transaction-manager="transactionManager"/>
45
46
47 </beans>

3.mybatis配置（主要就一个定义别名）

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE configuration
 3 PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
 4 "http://mybatis.org/dtd/mybatis-3-config.dtd">
 5 <configuration>
 6     <!-- 设置别名 -->
 7     <typeAliases>
 8         <!-- 2. 指定扫描包，会把包内所有的类都设置别名，别名的名称就是类名，大小写不敏感 -->
 9         <package name="cn.qlq.springmvc.pojo" />
10     </typeAliases>
11
12 </configuration>

4.springMVC配置(主要就是配置扫描Service和Controller)

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
 4     xmlns:context="http://www.springframework.org/schema/context"
 5     xmlns:mvc="http://www.springframework.org/schema/mvc"
 6     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
 7         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
 8         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">
 9
10
11
12         <!-- 扫描@Controler  @Service   -->
13         <context:component-scan base-package="cn.qlq"/>
14
15         <!-- 处理器映射器 -->
16 <!--         <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/> -->
17         <!-- 处理器适配器 -->
18 <!--         <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/> -->
19         <!-- 注解驱动 -->
20         <mvc:annotation-driven/>
21
22
23
24         <!-- 视图解释器 -->
25         <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
26             <property name="prefix" value="/WEB-INF/jsp/"/>
27             <property name="suffix" value=".jsp"/>
28         </bean>
29
30    </beans>

5.Service使用注解注入Mapper(主要就是自己添加service注释与内部注入mapper)

   5.1 接口(接口中不做任何声明)

1 package cn.qlq.springmvc.service;
2 import java.util.List;
3
4 import cn.qlq.springmvc.pojo.Items;
5 public interface ItemService {
6     public List<Items> findAllItems();
7 }

    5.2.Service实现类(自己添加service注释与内部注入mapper)

 1 package cn.qlq.springmvc.service;
 2
 3 import java.util.List;
 4
 5 import org.springframework.beans.factory.annotation.Autowired;
 6 import org.springframework.stereotype.Service;
 7
 8 import cn.qlq.springmvc.mapper.ItemsMapper;
 9 import cn.qlq.springmvc.pojo.Items;
10
11 @Service
12 public class ItemsServiceImpl implements ItemService {
13
14     @Autowired
15     private ItemsMapper itemsMapper;
16     @Override
17     public List<Items> findAllItems() {
18
19         List<Items> selectByExampleWithBLOBs = itemsMapper.selectByExampleWithBLOBs(null);
20         return selectByExampleWithBLOBs;
21     }
22
23 }

6. 控制层(声明自己是Controller层与自动注入Service)

package cn.qlq.springmvc.controller;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.HttpRequestHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import cn.qlq.springmvc.pojo.Items;
import cn.qlq.springmvc.service.ItemService;

/**
 * 商品管理
 *
 * @author lx
 *
 */
@Controller
public class ItemController {
    @Autowired
    private ItemService itemService;
    //入门程序 第一   包类 + 类包 + 方法名
    @RequestMapping(value = "/item/itemlist.action")
    public ModelAndView itemList(){
        //从Mysql中查询
        List<Items> list = itemService.findAllItems();

        ModelAndView mav = new ModelAndView();
        //数据
        mav.addObject("itemList", list);
        mav.setViewName("itemList");
        return mav;
    }

}

总结:Service层注入时只用在实现类上声明service。注入时候注入接口名字。可以用自动装配@Autowired,也可以用

@Resource(name="baseDao")
private BaseDao baseDao; 

这种格式注入对象，name就是扫描后的名字。