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
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<?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
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<?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
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<?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
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<?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
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<?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
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<?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
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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
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#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
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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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