springmvc+mybatis 整合

2018年03月02日 14:52 | 2029次浏览

一、前言

本文主要讲解springMVC+mybatis整合,关于mybatis教程,请参考https://www.vxzsk.com/53/cate.html 。然后我们回顾一下上一章节讲解SpringMVC的一些详细分析,主要讲解了

非注解两种映射器:BeanNameUrlHandlerMapping、SimpleUrlHandlerMapping;两种适配HttpRequestHandlerAdapter、SimpleControllerHandlerAdapter

注解的映射器:RequestMappingInfoHandlerMapping注解的适配器:AnnotationMethodHandlerAdapter,

视图解析器:ViewResolver

以及如何通过DispatcherServlet来一步步实现了MVC,返回页面组装数据的

1.2 springMVC+mybatis整合流程如下:

第一步:整合Dao,spring与mybatis整合

第二步:整合Service,Service可以调用Mapper

第三步:整合Controller,Controller可以调用Service

二、SpringMVC整合Mybatis 基于maven项目

2.1 Jar包导入

<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.ycy.spring01</groupId>  
  <artifactId>spring01</artifactId>  
  <packaging>war</packaging>  
  <version>1.0-spring01</version>  
  <name>spring Maven Webapp</name>  
  <url>http://maven.apache.org</url>  
  <dependencies>  
    <dependency>  
      <groupId>junit</groupId>  
      <artifactId>junit</artifactId>  
      <version>4.11</version>  
      <scope>test</scope>  
    </dependency>  
    <!--数据库驱动-->  
    <dependency>  
      <groupId>mysql</groupId>  
      <artifactId>mysql-connector-java</artifactId>  
      <version>5.1.30</version>  
    </dependency>  
    <!--数据库链接-->  
    <dependency>  
      <groupId>commons-dbcp</groupId>  
      <artifactId>commons-dbcp</artifactId>  
      <version>1.2.2</version>  
    </dependency>  
    <!--springMvc-->  
    <dependency>  
      <groupId>org.springframework</groupId>  
      <artifactId>spring-webmvc</artifactId>  
      <version>4.2.0.RELEASE</version>  
    </dependency>  
    <dependency>  
      <groupId>org.springframework</groupId>  
      <artifactId>spring-jdbc</artifactId>  
      <version>4.2.0.RELEASE</version>  
    </dependency>  
    <dependency>  
      <groupId>org.aspectj</groupId>  
      <artifactId>aspectjweaver</artifactId>  
      <version>1.8.7</version>  
    </dependency>  
    <!--log4j官方推荐jar-->  
    <dependency>  
      <groupId>org.apache.logging.log4j</groupId>  
      <artifactId>log4j-api</artifactId>  
      <version>2.3</version>  
    </dependency>  
    <dependency>  
      <groupId>org.apache.logging.log4j</groupId>  
      <artifactId>log4j-core</artifactId>  
      <version>2.3</version>  
    </dependency>  
    <!--log4j实现slf4j:因为Mybatis是用的slf4j-->  
    <dependency>  
      <groupId>org.apache.logging.log4j</groupId>  
      <artifactId>log4j-slf4j-impl</artifactId>  
      <version>2.3</version>  
    </dependency>  
    <!--spring+Mybatis-->  
    <dependency>  
      <groupId>org.mybatis</groupId>  
      <artifactId>mybatis-spring</artifactId>  
      <version>1.2.3</version>  
    </dependency>  
    <dependency>  
      <groupId>org.mybatis</groupId>  
      <artifactId>mybatis</artifactId>  
      <version>3.3.0</version>  
    </dependency>  
    <!--servlet包-->  
    <dependency>  
      <groupId>javax.servlet</groupId>  
      <artifactId>servlet-api</artifactId>  
      <version>2.5</version>  
      <scope>provided</scope>  
    </dependency>  
    <dependency>  
      <groupId>javax.servlet.jsp</groupId>  
      <artifactId>jsp-api</artifactId>  
      <version>2.1</version>  
      <scope>provided</scope>  
    </dependency>  
    <!--标签库-->  
    <dependency>  
      <groupId>jstl</groupId>  
      <artifactId>jstl</artifactId>  
      <version>1.2</version>  
    </dependency>  
    <dependency>  
      <groupId>taglibs</groupId>  
      <artifactId>standard</artifactId>  
      <version>1.1.2</version>  
      <scope>provided</scope>  
    </dependency>  
  </dependencies>  
  <build>  
    <finalName>spring01</finalName>  
  </build>  
</project>

2.2 配置整合开启

按照SpringMVC的制度一步步来

2.2.1 配置Dao1:applicationContext-dao.xml ---数据源、SqlsessionFactory、Mapper扫描

2.2.2 配置Dao2:SqlMapConfig.xml---mybatis的配置文件,配置别名、settings、mapper

2.2.3  配置Service1:applicationContext-service.xml---配置service接口

2.2.4  配置Service2:applicationContext-transaction.xml--事务管理

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

记住口诀:2Dao+2Service+1MVC=springMVC+mybatis

2.2.1配置Dao

1、我们将spring-dao与事务一起配置:构成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-4.0.xsd 
		http://www.springframework.org/schema/mvc 
		http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd 
		http://www.springframework.org/schema/context 
		http://www.springframework.org/schema/context/spring-context-4.0.xsd 
		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 ">
    <!-- ========================================配置数据源========================================= -->
    <!-- 加载配置文件 -->
    <context:property-placeholder location="classpath:/config/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>
    <!-- ========================================针对myBatis的配置项============================== -->
    <!-- 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>

    <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 -->
        <property name="basePackage" value="com.ycy.mapper"/>
        <!-- 使用sqlSessionFactoryBeanName -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>
    <!-- ========================================事物配置========================================= -->
    <!-- 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.ycy.service.impl.*.*(..))"/>
    </aop:config>
</beans>

db.properties配置文件

driverClassName=oracle.jdbc.driver.OracleDriver
url=jdbc:oracle:thin:@127.0.0.0:1521/orcl
username=root
password=root

2、依照订单为例子建立mapper与sqlconfig

sqlMapConfig.xml如下:

<!DOCTYPE configuration  
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"  
        "http://mybatis.org/dtd/mybatis-3-config.dtd">  
<configuration>  
    <!-- =================================全局配置参数=============================== -->  
    <settings>  
        <!-- 延迟加载总开关 -->  
        <setting name="lazyLoadingEnabled" value="true" />  
        <!-- 设置按需加载 -->  
        <setting name="aggressiveLazyLoading" value="false" />  
        <!-- 二级缓存总开关 -->  
        <setting name="cacheEnabled" value="true"/>  
    </settings>  
    <!--===============================加载mapper====================================-->  
    <mappers>  
        <!--1:通过resource路径导入xml映射(idea必须在resource文件下面)-->  
        <mapper  resource="mapper/ItemsMapper.xml"/>  
        <!--3:通过批量导入package,自动扫描包下面mapper接口 注意:此时class文件必须与想xml文件在一个目录下,同名-->  
        <!--<package name="com.ycy.mybatis.dao"/>-->  
    </mappers>  
</configuration>

-

ItemsMapper.xml如下:

<?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.ycy.mapper.ItemsMapper">  
  
<select id="getItemsById" parameterType="com.ycy.dto.parameter.ItemsCustom"  
            resultType="com.ycy.dto.result.ItemsCustomResult">  
  SELECT  * from items WHERE  id=#{id}  
</select>  
  
    <select id="findtemsList" parameterType="com.ycy.dto.parameter.ItemsCustom"  
            resultType="com.ycy.dto.result.ItemsCustomResult">  
    SELECT  * from items  
  </select>  
</mapper>

3、配置mapper.java

package com.ycy.mapper;  
  
import com.ycy.dto.parameter.ItemsCustom;  
import com.ycy.dto.result.ItemsCustomResult;  
  
import java.util.List;  
  
/**  
 * 
 */  
public interface ItemsMapper {  
    public ItemsCustomResult getItemsById(ItemsCustom itemsCustom);  
  
    public List<ItemsCustomResult> findtemsList(ItemsCustom itemsCustom);  
  
  
}

2.2.1配置Service

1、applicationContext-service.xml配置文件

<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-4.0.xsd  
        http://www.springframework.org/schema/mvc  
        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd  
        http://www.springframework.org/schema/context  
        http://www.springframework.org/schema/context/spring-context-4.0.xsd  
        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 ">  
  
    <!-- 扫描service 包配置 -->  
    <context:component-scan base-package="com.ycy.service"/>  
  
</beans>

2、service的java文件

ItemsService:如下

package com.ycy.service;  
  
import com.ycy.dto.parameter.ItemsCustom;  
import com.ycy.dto.result.ItemsCustomResult;  
  
import java.util.List;  
  
/**  
 * Created by Administrator on 2015/9/22 0022.  
 */  
public interface ItemsService {  
    public ItemsCustomResult getItemsById(Integer id, ItemsCustom itemsCustom) throws Exception;  
  
    public List<ItemsCustomResult> findtemsList(ItemsCustom itemsCustom)throws Exception;;  
}

ItemsServiceImpl如下:

package com.ycy.service.impl;  
  
import com.ycy.dto.parameter.ItemsCustom;  
import com.ycy.dto.result.ItemsCustomResult;  
import com.ycy.mapper.ItemsMapper;  
import com.ycy.service.ItemsService;  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.stereotype.Service;  
  
import java.util.List;  
  
/**  
 * Created by Administrator on 2015/9/22 0022.  
 */  
public class ItemsServiceImpl implements ItemsService {  
    @Autowired  
    private ItemsMapper itemsMapper;  
  
    public ItemsCustomResult getItemsById(Integer id,ItemsCustom itemsCustom) throws  Exception{  
        if(id!=null){  
            return itemsMapper.getItemsById(itemsCustom);  
        }else{  
            throw new Exception("query id is null");  
        }  
  
    }  
  
    public List<ItemsCustomResult> findtemsList(ItemsCustom itemsCustom) throws Exception {  
        return itemsMapper.findtemsList(itemsCustom);  
    }  
  
  
}


2.2.3配置Controller

1、首先我们需要把service、dao加入web环境,再加上之前配置的Dispatcher,web.xml是如下:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         metadata-complete="false">
    <!-- 配置spring容器监听器 -->
    <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>
    <!-- 设置servlet编码开始 -->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/</url-pattern>
    </filter-mapping>
    <!-- 设置servlet编码结束 -->
    <display-name>Archetype Created Web Application</display-name>
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>

</web-app>

2、SpringMVC.xml文件编写

<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-4.0.xsd
		http://www.springframework.org/schema/mvc
		http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
		http://www.springframework.org/schema/context
		http://www.springframework.org/schema/context/spring-context-4.0.xsd
		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 ">
    <!--1、=========================dispatcher已经在web.xml里面配置=============================-->
    <!-- 使用spring组件扫描 -->
    <context:component-scan base-package="com.ycy.controller"/>

    <!-- 2、3 通过annotation-driven可以替代下边的处理器映射器和适配器 -->
    <!-- 	<mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>-->


    <!--2、=======================使用注解RequestMappingInfoHandlerMapping映射器==================== -->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>

    <!--3、=============================处理器适配器HandlerAdapter================================-->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>

    <!--4、============================视图解析器ViewResolver======================================-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/pages/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--5、视图view与hanlder需要自己实现-->
</beans>

3、编写Controller的java文件

ItemController如下:

package com.ycy.controller;  
  
  
import com.ycy.dto.parameter.ItemsCustom;  
import com.ycy.dto.result.ItemsCustomResult;  
import com.ycy.model.Items;  
import com.ycy.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.ArrayList;  
import java.util.Date;  
import java.util.List;  
  
/**  
 * Created by Administrator on 2015/9/17 0017.  
 */  
@Controller  
public class ItemController {  
    @Autowired  
    private ItemsService itemsService;  
    @RequestMapping("/queryItems")  
    public ModelAndView queryItems(javax.servlet.http.HttpServletRequest httpServletRequest,  
                                      javax.servlet.http.HttpServletResponse httpServletResponse) throws Exception {  
        ItemsCustom itemsCustom=new ItemsCustom();  
        itemsCustom.setId(1);  
        //商品列表  
        List<ItemsCustomResult> itemsList = itemsService.findtemsList(null);  
  
        //创建modelAndView准备填充数据、设置视图  
        ModelAndView modelAndView = new ModelAndView();  
        //填充数据  
        modelAndView.addObject("itemsList", itemsList);  
        //视图  
        modelAndView.setViewName("order/itemsList");  
  
        return modelAndView;  
    }  
}

2.2.3 编写页面

itemsList.jsp如下:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" isELIgnored="false" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"  %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"  prefix="fmt" %>
<!DOCTYPE HTML>
<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="${pageContext.request.contextPath }/items/queryItem.action" method="post">
查询条件:
<table width="100%" border=1>
<tr>
<td><input type="submit" value="查询"/></td>
</tr>
</table>
商品列表:33
<table width="100%" border=1>
<tr>
	<td>商品名称</td>
	<td>商品价格</td>
	<td>生产日期</td>
	<td>商品描述</td>
	<td>操作</td>
</tr>
	<c:forEach items="${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>

2.2.4 配置完成结构如下:

spring+mybatis

三、总结

1、整合Jar:log4j的包导入,log4j实现slf4j:因为Mybatis是用的slf4j

          aspectjweaver包的导入,它的作用起到事务管理作用,相信在不久的将来会融合到springMVC中,至少目前我们用这种方法除开springMvc包还需          要两个包才能构成MVC完整,那就是spring.jdbc 与aspectjweaver,一般用他们管理事务。

2、建议初学者最好按照上述步骤一步一步来,虽然花费时间,但是对理解springMVC+mybatis整合理解更加深刻。

-----------本文改编自ycy博文



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