springmvc和mybatis整合—商品查询
2017-12-11 本文已影响107人
小小蒜头
1. 需求
使用springmvc和mybatis完成商品列表查询。
2. 整合思路
springmvc+mybaits的系统架构：
系统架构
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。
3. 准备环境
数据库环境：mysql5.5
数据库表
java环境：
jdk1.8
IDEA
所需要的jar包：
数据库驱动包：mysql5.1
mybatis的jar包
mybatis和spring整合包
log4j包
dbcp数据库连接池包
spring3.2所有jar包
jstl包
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.eurasia</groupId>
<artifactId>SpringMVC_mybatis</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>SpringMVC_mybatis Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<!-- spring版本号 -->
<spring.version>4.0.9.RELEASE</spring.version>
<!-- mybatis版本号 -->
<mybatis.version>3.3.0</mybatis.version>
<!-- mysql驱动版本号 -->
<mysql-driver.version>5.1.18</mysql-driver.version>
<!-- log4j日志包版本号 -->
<slf4j.version>1.7.18</slf4j.version>
<log4j.version>1.2.17</log4j.version>
</properties>
<dependencies>
<!-- 添加jstl依赖 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>
<!-- 添加junit4依赖 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<!-- 指定范围，在测试时才会加载 -->
<scope>test</scope>
</dependency>
<!-- 添加spring核心依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.6</version>
</dependency>
<!-- 添加mybatis依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!-- 添加mybatis/spring整合包依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
<!-- 添加mysql驱动依赖 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-driver.version}</version>
</dependency>
<!-- 添加数据库连接池依赖 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.2</version>
</dependency>
<!-- 添加日志相关jar包 -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
</dependencies>
<build>
<finalName>SpringMVC_mybatis</finalName>
</build>
</project>
4. 整合dao
4.1 sqlMapConfig.xml
mybatis自己的配置文件。
<?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>
<!--配置别名-->
<typeAliases>
<!--批量扫描别名-->
<package name="com.eurasia.pojo"/>
</typeAliases>
<!--配置mapper
由于使用Spring和mybatis的整合包进行mapper扫描，这里不需要配置
必须遵循mapper.xml和mapper.java文件同名且在一个目录
-->
</configuration>
4.2 applicationContext-dao.xml
配置：数据源、SqlSessionFactory、mapper扫描器
<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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd">
<!-- 加载db.properties文件中的内容，db.properties文件中key命名要有一定的特殊规则 -->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置数据源,dbcp -->
<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>
<!-- sqlSessionFactory -->
<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">
<!-- 扫描包路径，如果需要扫描多个包，中间使用半角逗号隔开 -->
<property name="basePackage" value="com.eurasia.mapper"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
</beans>
4.3 逆向工程生成po类及mapper(单表增删改查)
效果
4.4 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。
4.4.1 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.eurasia.mapper.ItemsMapperCustom">
<!--定义商品查询的sql片段，就是商品查询条件-->
<!--使用动态sql，通过if判断，满足条件进行sql拼接
商品查询条件通过ItemsQueryVo包装对象中itemsCustom属性传递-->
<sql id="query_items_where">
<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.eurasia.pojo.ItemsQueryVo" resultType="com.eurasia.pojo.ItemsCustom">
SELECT items.* FROM items
<where>
<include refid="query_items_where"/>
</where>
</select>
</mapper>
4.4.2 ItemsMapperCustom.java
package com.eurasia.mapper;
import com.eurasia.pojo.ItemsCustom;
import com.eurasia.pojo.ItemsQueryVo;
import java.util.List;
public interface ItemsMapperCustom {
//商品查询列表
public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception;
}
5 整合service
让spring管理service接口。
5.1 定义service接口
package com.eurasia.service;
import com.eurasia.pojo.ItemsCustom;
import com.eurasia.pojo.ItemsQueryVo;
import java.util.List;
public interface ItemsService {
//商品查询列表
public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception;
}
package com.eurasia.service.impl;
import com.eurasia.mapper.ItemsMapperCustom;
import com.eurasia.pojo.ItemsCustom;
import com.eurasia.pojo.ItemsQueryVo;
import com.eurasia.service.ItemsService;
import org.springframework.beans.factory.annotation.Autowired;
import java.util.List;
public class ItemsServiceImpl implements ItemsService {
@Autowired
private ItemsMapperCustom itemsMapperCustom;
public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception {
//通过ItemsMapperCustom查询数据库
return itemsMapperCustom.findItemsList(itemsQueryVo);
}
}
5.2 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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
">
<!-- 商品管理的service -->
<bean id="itemsService" class="com.eurasia.service.impl.ItemsServiceImpl"/>
</beans>
5.3 事务控制(applicationContext-transaction.xml)
在applicationContext-transaction.xml中使用spring声明式事务控制方法。
<!--suppress ALL -->
<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: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/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
dataSource在applicationContext-dao.xml中配置了
-->
<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="delete*" propagation="REQUIRED"/>
<tx:method name="insert*" 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>
<!-- aop -->
<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.eurasia.service.impl.*.*(..))"/>
</aop:config>
</beans>
6. 整合SpringMVC
6.1 springmvc.xml
创建springmvc.xml文件，配置处理器映射器、适配器、视图解析器。
<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"
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">
<!-- 可以扫描controller、service、...
这里让扫描controller，指定controller的包
-->
<context:component-scan base-package="com.eurasia.controller"></context:component-scan>
<!-- 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
解析jsp解析，默认使用jstl标签，classpath下的得有jstl的包
-->
<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>
6.2 配置前端控制器
在web.xml文件里作如下配置
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</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/WEB-INF/servlet名称-servlet.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>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>
6.3 编写Controller(就是Handler)
package com.eurasia.controller;
import com.eurasia.pojo.ItemsCustom;
import com.eurasia.service.ItemsService;
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 java.util.List;
/**
* Created by yvettee on 2017/11/30.
*/
@Controller
public class ItemsController{
@Autowired
private ItemsService itemsService;
@RequestMapping("/queryItems")
public ModelAndView queryItems() throws Exception {
//调用service查找数据库，查询商品列表，这里使用静态数据模拟
List<ItemsCustom> list = itemsService.findItemsList(null);
//返回ModelAndView
ModelAndView modelAndView = new ModelAndView();
//相当于request.setAttribute
modelAndView.addObject("itemslist", list);
//指定视图
modelAndView.setViewName("/items/itemsList");
return modelAndView;
}
}
6.4 编写jsp
itemsList.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<html>
<head>
<title>商品列表</title>
</head>
<body>
<form action="/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="/item/editItem.action?id=${item.id}">修改</a></td>
</tr>
</c:forEach>
</table>
</form>
</body>
</html>
7. 加载spring容器
将mapper、service、controller加载到spring容器中。
1.png
建议使用通配符加载上边的配置文件。
在web.xml中，添加spring容器监听器，加载spring容器。前面已给出。
<!--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>
下篇：springmvc和mybatis整合—商品修改功能
源代码：https://github.com/yvettee36/SpringMVC_mybatis
