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前面讲到：Spring+SpringMVC+MyBatis深入学习及搭建(十三)——SpringMVC入门程序（二）
1.需求
使用springmvc和mybatis完成商品列表查询。
2.整合思路
springmvc+mybatis的系统架构：
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.环境准备
数据库环境：mysql5.6
java环境：
jdk1.7
MyEclipse2014
springmvc版本：spring3.2
所需要的jar包：
数据库驱动包
mybatis的jar包
mybatis的spring的整合包
log4j包
dbcp数据库连接池包
spring3.2所有jar包
jstl包
过程结构目录：
4.整合dao
mybatis和spring进行整合。
4.1 db.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatisdemo
jdbc.username=root
jdbc.password=
4.2 log4j.properties
# Global logging configuration，建议开发环境要用debug
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
4.3 sqlMapConfig.xml
在classpath下创建mybatis/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>
<typeAliases>
<package name="joanna.yan.ssm.po"/>
typeAliases>
configuration>
4.4 applicationContext-dao.xml
在classpath下创建spring/applicationContext-dao.xml。配置：数据源、事务管理、SqlSessionFactory、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 "> <context:property-placeholder location="classpath:db.properties"/> <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> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="configLocation" value="classpath:mybatis/sqlMapConfig.xml" /> <property name="dataSource" ref="dataSource" /> bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="joanna.yan.ssm.mapper"/> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> bean> beans>
4.5逆向工程生成po类及mapper（即单表增删改查）
详情见：Spring+SpringMVC+MyBatis深入学习及搭建(十)——MyBatis逆向工程
将生成的文件拷贝至工程中。
4.6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。
4.6.1 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="joanna.yan.ssm.mapper.ItemsMapperCustom" >
<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>
<select id="findItemsList" parameterType="joanna.yan.ssm.po.ItemsQueryVo"
resultType="joanna.yan.ssm.po.ItemsCustom">
SELECT items.* FROM items
<where>
<include refid="query_items_where">include>
where>
select>
mapper>
4.6.2 ItemsMapperCustom.java
public interface ItemsMapperCustom { //商品查询列表 public ListfindItemsList(ItemsQueryVo itemsQueryVo) throws Exception; }
5.整合service
让spring管理service接口。
5.1定义service接口
package joanna.yan.ssm.service; import java.util.List; import joanna.yan.ssm.po.ItemsCustom; import joanna.yan.ssm.po.ItemsQueryVo; public interface ItemsService { //商品查询列表 public ListfindItemsList(ItemsQueryVo itemsQueryVo) throws Exception; }
package joanna.yan.ssm.service.impl; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import joanna.yan.ssm.mapper.ItemsMapperCustom; import joanna.yan.ssm.po.ItemsCustom; import joanna.yan.ssm.po.ItemsQueryVo; import joanna.yan.ssm.service.ItemsService; public class ItemsServiceImpl implements ItemsService{ @Autowired private ItemsMapperCustom itemsMapperCustom; @Override public ListfindItemsList(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）
在classpath下创建spring/applicationContext-service.xml，文件中配置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 "> <bean id="itemsService" class="joanna.yan.ssm.service.impl.ItemsServiceImpl"/> beans>
5.3事务控制（applicationContext-transaction.xml）
在classpath下创建spring/applicationContext-service.xml，文件中使用spring声明式事务控制方法。
<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 "> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"/> bean> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="save*" propagation="REQUIRED"/> <tx:method name="delete*" propagation="REQUIRED"/> <tx:method name="update*" propagation="REQUIRED"/> <tx:method name="insert*" 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:config> <aop:advisor advice-ref="txAdvice" pointcut="execution(* joanna.yan.ssm.service.impl.*.*(..))"/> aop:config> beans>
6.整合springmvc
6.1 springmvc.xml
在classpath下创建spring/springvc.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" 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 "> <context:component-scan base-package="joanna.yan.ssm.controller">context:component-scan> <mvc:annotation-driven>mvc:annotation-driven> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> bean> beans>
6.2配置前端控制器
参考入门程序：Spring+SpringMVC+MyBatis深入学习及搭建(十二)——SpringMVC入门程序（一）
在web.xml中配置：
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_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>SpringMVC_MyBatisdisplay-name>
<welcome-file-list>
<welcome-file>index.jspwelcome-file>
welcome-file-list>
<servlet>
<servlet-name>springmvcservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring/springmvc.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>springmvcservlet-name>
<url-pattern>*.actionurl-pattern>
servlet-mapping>
web-app>
6.3编写Controller（就是Handler）
@Controller public class ItemsController { @Autowired private ItemsService itemsService; //商品查询http://localhost:8080/SpringMVC_MyBatis/queryItems.action @RequestMapping("/queryItems") public ModelAndView queryItems() throws Exception{ //调用service查找数据库，查询商品列表 ListitemsList=itemsService.findItemsList(null); //返回ModelAndView ModelAndView modelAndView=new ModelAndView(); modelAndView.addObject("itemsList", itemsList); //指定视图 // modelAndView.setViewName("/WEB-INF/jsp/items/itemsList.jsp"); //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("items/itemsList"); return modelAndView; } }
6.4编写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=${item.id}">修改a>td> tr> c:forEach> table> form> body> html>
7.加载spring容器
将mapper、service、controller加载到spring容器中。
建议使用通配符加载上边的配置文件。
在web.xml中添加spring容器监听器，加载spring容器。
<context-param> <param-name>contextConfigLocationparam-name> <param-value>/WEB-INF/classes/spring/applicationContext-*.xmlparam-value> context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class> listener>
8.商品查询调试
访问地址：http://localhost:8080/SpringMVC_MyBatis/queryItems.action
查询结果：
注意：在进行项目发布时，报错
javax.servlet.ServletException: Servlet.init() for servlet springmvc threw exception org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079) org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:620) org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745)
原因：服务器上Tomcat的jdk版本过高是1.8，而Spring的jar是3.2。
解决：降低jdk版本至1.7或将Spring的jar升至4.0及以上。
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