springmvc和mybatis整合

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一、需求

  使用springmvc和mybatis完成商品列表查询

二、整合思路

  springmvc+mybaits的系统架构:

  技术图片

  第一步:整合dao层

               mybatis和spring整合,通过spring管理mapper接口;

               使用mapper的扫描器自动扫描mapper接口在spring中进行注册

   第二步:整合service层

               通过spring管理 service接口;

               使用配置方式将service接口配置在spring配置文件中;

               实现事务控制

   第三步:整合springmvc

               由于springmvc是spring的模块,不需要整合

三、环境准备

  (1)数据库环境:mysql 5.7.25

      技术图片

  (2)数据库的系统环境:ubuntu 18.04.2

  (3)Java环境:JDK1.8.0_201;eclipse  2019-03

  (4)springmvc版本:4.0.0.RELEASE

  (5)所需要的jar包:数据库驱动包:mysql 5.1;

      mybatis的jar包;

      mybatis和spring整合包;

      log4j包;

      dbcp数据库连接池包;

      spring 4.0 所有jar包;jstl包

  (6)相关jar包提取

      链接: https://pan.baidu.com/s/1LreOdB83aKkFnu0RK8TVuQ 

      提取码: vuq3 

四、工程结构

  技术图片

五、整合dao

  5.1 sqlMapConfig.xml  

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <!-- 全局setting配置,根据需要添加 -->

    <!-- 别名配置 -->
    <typeAliases>
        <!-- 批量扫描别名 -->
        <package name="com.chuanye.ssm.pojo" />
    </typeAliases>

    <!-- 
        使用自动扫描器时,mapper.xml文件如果和mapper.java接口
        在一个目录则此处不用定义mappers 
    -->
    <!-- <mappers>
        <package name="com.chuanye.ssm.mapper" />
    </mappers> -->

</configuration>

  5.2 applicationContext-dao.xml

  配置:1)数据源;2)SqlSessionFactory;3)mapper扫描器

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.2.xsd 
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
    <!-- 加载配置文件 -->
    <context:property-placeholder
        location="classpath:db.properties" />
    <!-- 数据库连接池 -->
    <bean id="dataSource" 
            class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
        <property name="maxActive" value="30" />
        <property name="maxIdle" value="5" />
    </bean>


    <!-- 让spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->
    <bean id="sqlSessionFactory"
        class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 数据库连接池 -->
        <property name="dataSource" ref="dataSource" />
        <!-- 加载mybatis的全局配置文件 -->
        <property name="configLocation"
            value="classpath:mybatis/SqlMapConfig.xml" />
    </bean>
    <!-- mapper扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage"
            value="com.chuanye.ssm.mapper"></property>
        <property name="sqlSessionFactoryBeanName"
            value="sqlSessionFactory" />
    </bean>

</beans>

  5.3 逆向工程生成po类及mapper

  参考:https://www.cnblogs.com/soldierback/p/10606251.html

  技术图片

  将生成的文件拷贝至工程 中

  技术图片

  5.4 手动定义商品查询mapper

   (针对综合查询mapper,一般情况会有关联查询,建议自定义mapper)

  技术图片

    1)ItemsMapperCustom.xml

       sql语句:SELECT * FROM items  WHERE items.name LIKE ‘%笔记本%‘  

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.chuanye.ssm.mapper.ItemsMapperCustom">

    <!-- 定义商品查询的sql片段,就是商品查询条件 -->
    <sql id="query_items_where">
        <!-- 使用动态sql,通过if判断,满足条件进行sql拼接 -->
        <if test="itemsCustom != null">
            <if test="itemsCustom.name != null and itemsCustom.name != ‘‘">
                items.name LIKE ‘${itemsCustom.name}%‘
            </if>
        </if>
    </sql>

    <!-- 商品列表查询 -->
    <!-- 
        parameterType传入包装对象(包装了查询条件) 
        resultType建议使用扩展对象
    -->
    <select id="findItemsList" parameterType="com.chuanye.ssm.pojo.ItemsQueryVo" 
        resultType="com.chuanye.ssm.pojo.ItemsCustom">
        SELECT items.* FROM items  
        <where>
            <include refid="query_items_where"></include>
        </where>
    </select>

</mapper>

    2)ItemsMapperCustom.java

package com.chuanye.ssm.mapper;

import java.util.List;

import com.chuanye.ssm.pojo.ItemsQueryVo;

public interface ItemsMapperCustom {
    // 商品查询列表
    public List<ItemsMapperCustom> findItemsList(ItemsQueryVo itemsQueryVo) 
            throws Exception;
}

    3)ItemsCustom.java

package com.chuanye.ssm.pojo;

/**
 * <p>Title: ItemsCustom</p>
 * <p>Description: 商品信息扩展类</p>
 * <p>Copyright: Copyright (c) 2019</p>
 * <p>Company: chuanye</p>
 * @author  freebird
 * @version Mar 29, 20191:33:55 PM
 */
public class ItemsCustom extends Items {
    // 添加商品信息的扩展属性
}

    4)ItemsQueryVo

package com.chuanye.ssm.pojo;

/**
 * <p>Title: ItemsQueryVo</p>
 * <p>Description: 商品包装对象</p>
 * <p>Copyright: Copyright (c) 2019</p>
 * <p>Company: chuanye</p>
 * @author  freebird
 * @version Mar 29, 20191:32:07 PM
 */
public class ItemsQueryVo {
    // 商品信息
    private Items items;
    
    // 为了系统可扩展性,对原始生成的pojo进行扩展
    private ItemsCustom itemsCustom;

    public Items getItems() {
        return items;
    }

    public void setItems(Items items) {
        this.items = items;
    }

    public ItemsCustom getItemsCustom() {
        return itemsCustom;
    }

    public void setItemsCustom(ItemsCustom itemsCustom) {
        this.itemsCustom = itemsCustom;
    }
}

 六、整合service(让spring管理service接口)

  6.1 定义service接口

package com.chuanye.ssm.service;

import java.util.List;

import com.chuanye.ssm.pojo.ItemsCustom;
import com.chuanye.ssm.pojo.ItemsQueryVo;

/**
 * <p>Title: ItemsSerevice</p>
 * <p>Description: 商品管理service接口</p>
 * <p>Copyright: Copyright (c) 2019</p>
 * <p>Company: chuanye</p>
 * @author  freebird
 * @version Mar 29, 20192:02:22 PM
 */
public interface ItemsSerevice {
    // 商品查询列表
    public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) 
            throws Exception;
}
package com.chuanye.ssm.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;

import com.chuanye.ssm.mapper.ItemsMapperCustom;
import com.chuanye.ssm.pojo.ItemsCustom;
import com.chuanye.ssm.pojo.ItemsQueryVo;
import com.chuanye.ssm.service.ItemsSerevice;

/**
 * <p>Title: ItemsServiceImpl</p>
 * <p>Description: 商品管理service实现</p>
 * <p>Copyright: Copyright (c) 2019</p>
 * <p>Company: chuanye</p>
 * @author  freebird
 * @version Mar 29, 20192:05:28 PM
 */
public class ItemsServiceImpl implements ItemsSerevice {
    
    @Autowired
    private ItemsMapperCustom ItemsMapperCustom;

    @Override
    public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception {
        // TODO Auto-generated method stub
        return ItemsMapperCustom.findItemsList(itemsQueryVo);
    }

}

  6.2 在spring容器配置service(applicationContext-service.xml)

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.2.xsd 
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
        
    <!-- 商品管理service -->
    <bean id="itemsService" class="com.chuanye.ssm.service.impl.ItemsServiceImpl">
    </bean>
        
</beans>

  6.3 事务控制(applicationContext-transaction.xml)

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.2.xsd 
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">

    <!-- 事务管理器,对mybatis操作数据库事务控制,spring使用jdbc的事务控制类 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 数据源 -->
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 通知 -->
    <tx:advice id="txAdvice"
        transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 传播行为 -->
            <tx:method name="save*" propagation="REQUIRED" />
            <tx:method name="insert*" propagation="REQUIRED" />
            <tx:method name="delete*" propagation="REQUIRED" />
            <tx:method name="update*" propagation="REQUIRED" />
            <tx:method name="find*" propagation="SUPPORTS"
                read-only="true" />
            <tx:method name="get*" propagation="SUPPORTS"
                read-only="true" />
            <tx:method name="select*" propagation="SUPPORTS"
                read-only="true" />
        </tx:attributes>
    </tx:advice>

    <!-- 切面 -->
    <aop:config>
        <aop:advisor advice-ref="txAdvice"
            pointcut="execution(* com.chuanye.ssm.service.impl.*.*(..))" />
    </aop:config>

</beans>

七、整合springmvc(创建springmvc.xml文件,配置处理器映射器、适配器、视图解析器)

  7.1 springmvc.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop" 
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.2.xsd 
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.2.xsd 
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
    
    <!-- 扫描controller包 -->
    <context:component-scan base-package="com.chuanye.ssm.controller" />

    
    <!-- 《注解映射器》 -->
    <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/> -->
    <!-- 《注解适配器》 -->
    <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/> -->
    <!-- 
        使用 mvc:annotation-driven代替上边注解映射器和注解适配器配置
        mvc:annotation-driven默认加载很多的参数绑定方法,比如json转换
        解析器就默认加载了,如果使用mvc:annotation-driven不用配置上边的
        RequestMappingHandlerMapping和RequestMappingHandlerAdapter
        实际开发时使用mvc:annotation-driven
     -->
    <mvc:annotation-driven></mvc:annotation-driven>
    
    <!-- 《视图解析器》 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" >
        <!-- 配置jsp路径的前缀 -->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!-- 配置jsp路径的后缀 -->
        <property name="suffix" value=".jsp"/>
    </bean>
    
</beans>

  7.2 配置前端控制器并加载spring容器(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>springmvc_mybatis</display-name>
    
    <!-- 加载spring容器 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    
    <!-- springmvc前端控制器 -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 
            contextConfigLocation配置springmvc加载的配置
            文件(配置处理器映射器、适配器等等) 如果不 配置contextConfigLocation,
            默认加载的是/WEB-INF/servlet名称-serlvet.xml(springmvc-servlet.xml)
        -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/springmvc.xml</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <!-- 
            第一种:*.action,访问以.action结尾 由DispatcherServlet进行解析; 
            第二种:/,所以访问的地址都由DispatcherServlet进行解析,对于静态文件的解析需要配置不 
            让DispatcherServlet进行解析 使用此种方式可以实现 RESTful风格的url;
             第三种:/*,这样配置不对,使用这种配置,最终要转发到一个jsp页面时, 
            仍然会由DispatcherServlet解析jsp地址,不能根据jsp页面找到handler,会报错
         -->
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>
</web-app>

  7.3 编写controller

package com.chuanye.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.servlet.ModelAndView;

import com.chuanye.ssm.pojo.ItemsCustom;
import com.chuanye.ssm.service.ItemsSerevice;

/**
 * <p>Title: ItemsController</p>
 * <p>Description: 商品管理Controller</p>
 * <p>Copyright: Copyright (c) 2019</p>
 * <p>Company: chuanye</p>
 * @author  freebird
 * @version Mar 29, 20192:43:23 PM
 */
@Controller
public class ItemsController {
    
    @Autowired
    private ItemsSerevice itemsSerevice;
    
    // 商品查询
    @RequestMapping("/queryItems")
    public ModelAndView queryItems() throws Exception {
        
        // 调用service查找 数据库,查询商品列表
        List<ItemsCustom> itemsList = itemsSerevice.findItemsList(null);
    
        
        // 返回ModelAndView
        ModelAndView modelAndView =  new ModelAndView();
        // 相当 于request的setAttribut,在jsp页面中通过itemsList取数据
        modelAndView.addObject("itemsList", itemsList);
        
        // 指定视图
        // 下边的路径,如果在视图解析器中配置jsp路径的前缀和jsp路径的后缀,修改为
        // modelAndView.setViewName("/WEB-INF/jsp/items/itemsList.jsp");
        // 上边的路径配置可以不在程序中指定jsp路径的前缀和jsp路径的后缀
        modelAndView.setViewName("items/itemsList");
        
        return modelAndView;
        
    }
}

  7.4 编写jsp(itemsList.jsp)

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>查询商品列表</title>
</head>
<body>
    <form
        action="${pageContext.request.contextPath}/item/queryItem.action"
        method="post">
        查询条件:
        <table width="100%" border=1>
            <tr>
                <td><input type="submit" value="查询" /></td>
            </tr>
        </table>
        商品列表:
        <table width="100%" border=1>
            <tr>
                <td>商品名称</td>
                <td>商品价格</td>
                <td>生产日期</td>
                <td>商品描述</td>
                <td>操作</td>
            </tr>
            <c:forEach items="${itemsList }" var="item">
                <tr>
                    <td>${item.name}</td>
                    <td>${item.price}</td>
                    <td>
                        <fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/>
                    </td>
                    <td>${item.detail}</td>
                    <td>
                        <a href="${pageContext.request.contextPath}/item/editItem.action?id=${item.id}">
                            修改
                        </a>
                    </td>
                </tr>
            </c:forEach>
        </table>
    </form>
</body>
</html>  

八、运行测试

技术图片

九、项目目录

  技术图片

 

  

 

      

     

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