SpringMVC整合mybatis实例代码

silverduck 发布于1年前 阅读2652次
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MyBatis 本是apache的一个开源项目iBatis, 2010年这个项目由apache software foundation 迁移到了google code,并且改名为MyBatis 。

一、逆向工程生成基础信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<context id="testTables" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自动生成的注释 true:是 : false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!--数据库连接的信息:驱动类、连接地址、用户名、密码 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3307/mybatis" userId="root"
password="jalja">
</jdbcConnection>
<!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer,为 true时把JDBC DECIMAL 和 
NUMERIC 类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- targetProject:生成PO类的位置 -->
<javaModelGenerator targetPackage="com.jalja.springmvc_mybatis.model.pojo"
targetProject=".\src">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- targetProject:mapper映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.jalja.springmvc_mybatis.mapper" 
targetProject=".\src">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>
<!-- targetPackage:mapper接口生成的位置 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.jalja.springmvc_mybatis.mapper" 
targetProject=".\src">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</javaClientGenerator>
<!-- 指定数据库表 -->
<table tableName="items"></table>
<table tableName="orders"></table>
<table tableName="orderdetail"></table>
<table tableName="user"></table>
</context>
</generatorConfiguration> 
public static void main(String[] arhs) throws Exception{
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("src.main.resources/generator.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
} 

二、springMVC与Mybatis整合 各个配置文件

1.项目结构

2、各个文件的核心代码

a.web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app 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" version="3.0"> 
<welcome-file-list> 
<welcome-file>index.jsp</welcome-file> 
</welcome-file-list> 
<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> 
<context-param> 
<param-name>log4jConfigLocation</param-name> 
<param-value>classpath:log4j.properties</param-value> 
</context-param> 
<context-param> 
<param-name>log4jRefreshInterval</param-name> 
<param-value>3000</param-value> 
</context-param> 
<listener> 
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> 
</listener> 
<!-- post请求乱码 -->
<filter>
<filter-name>SpringEncodingFilter</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>SpringEncodingFilter</filter-name>
<url-pattern>*.do</url-pattern>
</filter-mapping> 
<!-- springMvc前端控制器 --> 
<servlet> 
<servlet-name>springMvc</servlet-name> 
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
<init-param> 
<!-- 
contextConfigLocation加载 springMvc的配置文件(处理器适配器 ,映射器) 
如果不配置默认加载的是 /WEB-INF/servlet名称-servlet.xml(springMvc-servlet.xml)
-->
<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> 
<!--
1、*.do :DispatcherServlet 解析所有 *.do 结尾的访问
2、 / :DispatcherServlet解析所有请求(包括静态资源) 这种配置可以实现restful风格的url
3、/*: 这种配置最终要转发到一个jsp页面 
-->
<url-pattern>*.do</url-pattern> 
</servlet-mapping> 
<!-- springMvc前端控制器 RestFul 
<servlet> 
<servlet-name>springMvc_rest</servlet-name> 
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
<init-param> 
<param-name>contextConfigLocation</param-name> 
<param-value>classpath:spring/applicationContext-springmvc.xml</param-value> 
</init-param> 
<load-on-startup>1</load-on-startup> 
</servlet> 
<servlet-mapping> 
<servlet-name>springMvc_rest</servlet-name> 
<url-pattern>/</url-pattern> 
</servlet-mapping> 
-->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
</web-app> 

b、config/mybatis/applicationContext-mybatis.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> 
<!-- 
各个属性
properties:
setting(全局配置参数配置):mybatis运行时可以调整一些运行参数 例如:开启二级缓存、开启延迟加载 
typeAliases(类型别名): 在mapper.xml中定义parameterType 参数类型 resultType 返回类型时 
需要指定类型的路径 不方便开发,我们开一针对 这些类型给其指定别名
typeHandler(类型处理器):在mybatis 中是通过typeHandler 完成 jdbc类型与java类型的转化 ,mybatis 提供的处理器已可满足 开发需求 
objectFactory(对象工厂):
plugins(插件):
environments(环境集合属性对象):
environment(环境子属性对象):
transactionManager(事务管理):
dataSource(数据源):
mappers(映射器): 
-->
<!-- 对事务的管理和连接池的配置 --> 
<!-- 延迟加载 -->
<settings>
<!-- 打开延迟加载 -->
<setting name="lazyLoadingEnabled" value="true"/>
<!-- 积极加载改为消极加载 -->
<setting name="aggressiveLazyLoading" value="false"/>
<!-- 开启二级缓存 -->
<setting name="cacheEnabled" value="true"/>
</settings>
<typeAliases>
<!-- 针对单个别名定义 -->
<!-- <typeAlias type="com.jalja.myBatis.model.User" alias="user"/> -->
<!--批量别名的定义 mybatis 自动扫描包中的类 别名就是类名(首字母大小写都可以) -->
<package name="com.jalja.springmvc_mybatis.model.pojo"/>
<package name="com.jalja.springmvc_mybatis.model.custom"/>
<package name="com.jalja.springmvc_mybatis.model.vo"/>
</typeAliases>
<!--加载映射文件 -->
<!-- <mappers> <mapper resource="com/jalja/spring_mybatis/mapper/UserMapper.xml"/> -->
<!-- 和spring整合后 可以去掉 
<package name="com.jalja.spring_mybatis.mapper"/> </mappers>-->
</configuration> 

c、config/spring/applicationContext-dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
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 
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/cache 
http://www.springframework.org/schema/cache/spring-cache-3.2.xsd">
<!-- 引入jdbc配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/> 
<!-- 对JDBC配置进行解密 
<bean id="propertyConfigurer" class="cn.com.sinobpo.project.wfjb.utils.EncryptablePropertyPlaceholderConfigurer"> 
<property name="locations">
<list>
<value>classpath:resources/config/jdbc.properties</value>
</list>
</property>
</bean> -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName">
<value>${jdbc_driverClassName}</value>
</property>
<property name="url">
<value>${jdbc_url}</value>
</property>
<property name="username">
<value>${jdbc_username}</value>
</property>
<property name="password">
<value>${jdbc_password}</value>
</property>
<!-- 连接池最大使用连接数 -->
<property name="maxActive">
<value>20</value>
</property>
<!-- 初始化连接大小 -->
<property name="initialSize">
<value>1</value>
</property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait">
<value>60000</value>
</property>
<!-- 连接池最大空闲 -->
<property name="maxIdle">
<value>20</value>
</property>
<!-- 连接池最小空闲 -->
<property name="minIdle">
<value>3</value>
</property>
<!-- 自动清除无用连接 -->
<property name="removeAbandoned">
<value>true</value>
</property>
<!-- 清除无用连接的等待时间 -->
<property name="removeAbandonedTimeout">
<value>180</value>
</property>
<!-- 连接属性 -->
<property name="connectionProperties">
<value>clientEncoding=UTF-8</value>
</property>
</bean>
<!-- spring和MyBatis完美整合 --> 
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 
<property name="dataSource" ref="dataSource"/> 
<property name="configLocation" value="classpath:mybatis/applicationContext-mybatis.xml"/>
</bean> 
<!--使用 mapper 代理 的方式 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.jalja.springmvc_mybatis.mapper"/> 
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> 
</bean> 
<!--声明式 事务管理 使用jdbc的事务管理 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置事务通知-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="save*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
<tx:method name="get*" propagation="SUPPORTS" read-only="true"/> 
<tx:method name="find*" propagation="SUPPORTS" read-only="true"/> 
</tx:attributes>
</tx:advice>
<!-- 配置事务的切点,并把事务切点和事务属性不关联起来AOP -->
<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.jalja.springmvc_mybatis.service.impl.*.*(..))"/>
</aop:config>
</beans> 

d、config/spring/applicationContext-service.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 
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 
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/cache 
http://www.springframework.org/schema/cache/spring-cache-3.2.xsd">
<bean id="itemsService" class="com.jalja.springmvc_mybatis.service.impl.ItemsServiceImpl"></bean>
</beans> 

e、config/spring/springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd 
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd 
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd 
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/cache 
http://www.springframework.org/schema/cache/spring-cache-3.2.xsd">
<!--注解 处理器 映射器 -->
<!-- 映射器 org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping springmvc3.1以前--> 
<!-- 映射器 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping springmvc3.1以后 -->
<!-- 适配器 org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter springmvc3.1以前--> 
<!-- 适配器 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter springmvc3.1以后 -->
<!--配置映射器和 适配器 
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/> -->
<!-- 开启注解 映射器和 适配器 这种方式默认加载了很多参数绑定的方法 例如 json转换解析器-->
<mvc:annotation-driven/>
<!-- 配置 Handler
<bean class="com.jalja.springmvc_mybatis.controller.UserController"/>-->
<!-- 注解 配置 基于组建扫描的方式 -->
<context:component-scan base-package="com.jalja.springmvc_mybatis.controller" />
<!-- 配置自定义参数解析器 -->
<mvc:annotation-driven conversion-service="conversionService"/>
<bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
<property name="converters">
<list>
<!-- 日期类型转换 -->
<bean class="com.jalja.springmvc_mybatis.converter.CustomDateConverter"></bean>
</list>
</property>
</bean>
<!-- 全局异常处理器 -->
<bean class="com.jalja.springmvc_mybatis.exception.CustomExceptionResolver"/>
<!-- 文件上传 -->
<!-- 支持上传文件 --> 
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 文件大小 5M -->
<property name="maxUploadSize" value="5242880"/>
</bean> 
<!-- 使用 restFul 风格 编程 照成 的 静态资源 访问 问题 -->
<!-- <mvc:resources mapping="/js/**" location="/resources/js/"/> -->
<!-- springMVC拦截器的配置 -->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**" />
<bean class="com.jalja.springmvc_mybatis.interceptor.LoginInterceptor" />
</mvc:interceptor>
</mvc:interceptors>
<!-- 视图映射 jsp解析 默认使用jstl-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 默认使用 -->
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean> 
</beans> 

f、config/jdbc.properties

jdbc_driverClassName=com.mysql.jdbc.Driver
jdbc_url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=UTF-8
jdbc_username=root
jdbc_password=111111 

g、config/log4j.properties

#在开发环境下的日志级别 要设置成debug,生成环境设置成info 或error
log4j.rootLogger=debug, stdout
log4j.logger.org.apache.ibatis=debug
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n 

h、com/jalja/springmvc_mybatis/controller/ItemsController.java

package com.jalja.springmvc_mybatis.controller;
import java.io.File;
import java.util.List;
import java.util.UUID;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import com.jalja.springmvc_mybatis.exception.CustomException;
import com.jalja.springmvc_mybatis.model.custom.ItemsCustom;
import com.jalja.springmvc_mybatis.service.ItemsService;
/**
* 商品 
* @author PC003
*conterver参数转换器 springMvc提供了很多参数转换器
*/
@Controller
@RequestMapping("/items") //窄化请求映射
public class ItemsController {
@Autowired ItemsService itemsService;
@RequestMapping(value="/findItemsList")
public String findItemsList(Model model) throws Exception{
List<ItemsCustom> itemsList=itemsService.findItemsList(null);
System.out.println(itemsList);
model.addAttribute("itemsList", itemsList);
return "itemsList";
}
@RequestMapping(value="/editItems", method={RequestMethod.POST,RequestMethod.GET}) //限制Http请求方式
//@RequestParam 将请求参数 与 形式参数进行绑定 required:指定属性必须传入值 defaultValue:设置默认值
public String editItems(Model model, @RequestParam(value="id",required=true,defaultValue="0") Integer itemsId) throws Exception{
ItemsCustom itemsCustom=itemsService.findItemsById(itemsId);
if(itemsCustom==null){
throw new CustomException("商品不存在");
}
model.addAttribute("itemsCustom", itemsCustom);
return "editItems";
}
@RequestMapping(value="/updateItems")
public String editItemsSubmit(Integer id,ItemsCustom itemsCustom,MultipartFile itemsPic) throws Exception{
String uploadFileName=itemsPic.getOriginalFilename();//获取上传的文件名
if(itemsPic!=null && uploadFileName!=null && !uploadFileName.equals("")){
String imagesPath="E:\\develop\\upload\\images\\";
String newFileName=UUID.randomUUID()+uploadFileName.substring(uploadFileName.lastIndexOf("."),uploadFileName.length());
File newFile=new File(imagesPath+newFileName);
itemsPic.transferTo(newFile);//将内存中的数据写入磁盘
itemsCustom.setPic(newFileName);
}
itemsService.updateItemsById(id, itemsCustom);
return "redirect:findItemsList.do"; //重定向
}
//JSON的使用 @ResponseBody:将对像转json输出 @RequestBody:将请求参数转 java对象
@RequestMapping(value="/jsonRequest")
public @ResponseBody ItemsCustom jsonRequest(@RequestBody ItemsCustom itemsCustom) throws Exception{
return itemsCustom;
}
//RestFul 风格 编程 /restFulRequest/{id}:表示将这个位置的参数传到 @PathVariable 指定的名称中
@RequestMapping(value="/restFulRequest/{id}")
public @ResponseBody ItemsCustom restFulRequest(@PathVariable("id") Integer id) throws Exception{
ItemsCustom itemsCustom=itemsService.findItemsById(id);
return itemsCustom;
}
}

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