SpringMVC学习（三）整合SpringMVC和MyBatis

2022-06-09 17:44:16

工程结构

导入jar包

配置文件

applicationContext-dao.xml---配置数据源、SqlSessionFactory、mapper扫描器

applicationContext-service.xml---配置service接口

applicationContext-transaction.xml--事务管理

sprintmvc.xml---springmvc的配置，配置处理器映射器、适配器、视图解析器

SqlMapConfig.xml---mybatis的配置文件，配置别名、settings、mapper

applicationContext-dao.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 ">

    <!-- 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="10" />
        <property name="maxIdle" value="5" />
    </bean>

    <!-- SqlsessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 数据源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- mybatis配置文件 -->
        <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml"/>
    </bean>

    <!--
    MapperScannerConfigurer：mapper的扫描器，将包下边的mapper接口自动创建代理对象，
    自动创建到spring容器中，bean的id是mapper的类名（首字母小写）
     -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 配置扫描包的路径
        如果要扫描多个包，中间使用半角逗号分隔
        要求mapper.xml和mapper.java同名且在同一个目录
         -->
        <property name="basePackage" value="com.cxz.ssm.mapper"/>
        <!-- 使用sqlSessionFactoryBeanName -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>

    </bean>

</beans>

applicationContext-transation.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 ">

     <!-- 使用声明式事务配置，可以有效规范代码 -->

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

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

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

</beans>

applicationContext-service.xml中配置service

<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 的service -->
<bean id="itemsService" class="com.cxz.ssm.service.impl.ItemsServiceImpl"/>

</beans>

配置web.xml

<!-- 配置spring容器监听器 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/classes/spring/applicationContext-*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 前端控制器 -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 加载springmvc配置 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!-- 配置文件的地址 如果不配置contextConfigLocation， 默认查找的配置文件名称classpath下的：servlet名称+"-serlvet.xml"即：springmvc-serlvet.xml -->
            <param-value>classpath:spring/springmvc.xml</param-value>
        </init-param>

    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <!-- 可以配置/ ，此工程 所有请求全部由springmvc解析，此种方式可以实现 RESTful方式，需要特殊处理对静态文件的解析不能由springmvc解析
            可以配置*.do或*.action，所有请求的url扩展名为.do或.action由springmvc解析，此种方法常用 不可以/*，如果配置/*，返回jsp也由springmvc解析，这是不对的。 -->
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>

配置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 ">

    <!-- 使用spring组件扫描 -->
    <context:component-scan base-package="com.cxz.ssm.controller" />

    <!-- 注解处理器映射器 -->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>

    <!-- 注解适配器 -->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
    </bean>

    <!-- 配置视图解析器 要求将jstl的包加到classpath -->
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

需求

查询商品列表

mapper

功能描述：根据条件查询商品信息，返回商品列表。

一般情况下针对查询mapper需要自定义mapper。

首先针对单表进行逆向工程，生成代码。

ItemsMapperCustom.xml

<?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.cxz.ssm.mapper.ItemsMapperCustom">

    <!-- 商品查询的sql片段
    建议是以单表为单位定义查询条件
    建议将常用的查询条件都写出来
     -->
    <sql id="query_items_where">
        <if test="itemsCustom!=null">

            <if test="itemsCustom.name!=null and itemsCustom.name!=''">
                and  name like '%${itemsCustom.name}%'
            </if>
            <if test="itemsCustom.id!=null">
                and  id = #{itemsCustom.id}
            </if>

        </if>
    </sql>

    <!-- 商品查询
    parameterType：输入 查询条件
    -->
    <select id="findItemsList" parameterType="com.cxz.ssm.po.ItemsQueryVo"
            resultType="com.cxz.ssm.po.ItemsCustom">
        SELECT * FROM items
        <where>
            <include refid="query_items_where"/>
        </where>
    </select>

</mapper>

包装类

ItemsQueryVo.java

package com.cxz.ssm.po;

public class ItemsQueryVo {

    //商品信息
    private ItemsCustom itemsCustom;

    public ItemsCustom getItemsCustom() {
        return itemsCustom;
    }

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

mapper.java

package com.cxz.ssm.mapper;

import java.util.List;

import com.cxz.ssm.po.ItemsCustom;
import com.cxz.ssm.po.ItemsQueryVo;

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

}

controller

package com.cxz.ssm.controller;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

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.cxz.ssm.po.ItemsCustom;
import com.cxz.ssm.service.ItemsService;

@Controller
public class ItemsController {

    //注入Service
    @Autowired
    private ItemsService itemsService;

    @RequestMapping("/queryItems")
    public ModelAndView queryItems(HttpServletRequest request) throws Exception {

        System.out.println(request.getParameter("id"));

        //调用service查询商品列表
        List<ItemsCustom> itemsList = itemsService.findItemsList(null);

        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("itemsList", itemsList);
        // 指定逻辑视图名
        modelAndView.setViewName("itemsList");

        return modelAndView;
    }

}

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="${pageContext.request.contextPath }/items/queryItem.action" method="post">
查询条件：
<table width="100%" border=1>
<tr>
<td><input type="submit" value="查询"/></td>
</tr>
</table>
商品列表：
<table width="100%" border=1>
<tr>
    <td>商品名称</td>
    <td>商品价格</td>
    <td>生产日期</td>
    <td>商品描述</td>
    <td>操作</td>
</tr>
<c:forEach items="${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="${pageContext.request.contextPath }/items/editItems.action?id=${item.id}">修改</a></td>

</tr>
</c:forEach>

</table>
</form>
</body>

</html>

tomcat运行

http://localhost:8080/springmvcmybatis/queryItems.action

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