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;
}
}
以上所述是小编给大家介绍的SpringMVC整合mybatis实例代码,希望对大家有所帮助,如果大家想了解更多资讯敬请关注phpstudy网站!
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