最近看到公司一同事在玩spring mvc,知道spring mvc已经出了很久了,空闲之余本人就整合了一下springmvc + jpa,其中jpa的实现还是Hibernate
现在注解是大行其道。
让我们回顾一下:
1、以前的servlet一定要在web.xml里配置每一个servlet,现在只要在servlet类上面配置下注解就可以。
2、struts的每一个Action请求要在struts.xml文件配置,不过也可以通过注解来配置每一个action请求@Repository("userDao")
3、在j2ee中每一个dao 或 service的bean要在spring.xml,其实也可能用注解来配置 @Repository("userDao") || @Service("userService")
4、spring mvc 在处理请求的时候是用Controller来实现,它可以在spring配置文件里去配置请求,用注解也不在话下了@Controller@RequestMapping("/user.do")
现在就来讲解下整合步骤:
step 1:配置下web.xml文件
在web.xml配置下将请求转交给spring去处理,
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
step 2:在WEB-INF里配置个dispatcher-servlet.xml
//下面是声明你可以用注解来配置controller,这样我们以后用注解来配置每一个请求就好了,不用在spring配置文件去配置每一个请求
<mvc:annotation-driven />
<context:component-scan base-package="com.kwok.springmvc.controller" />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
step3:请求这一步骤讲解了,接下来就配置jpa用hibernate实现怎么整合spring, 然后再junit测试下
配置Hibernate的数据库连接时,一般的工作流程都是先配置dataSource,再配置sessionFactory,然后配置事件管理,这个就不做详细的解释
下面是db.properties文件
jdbc.driverClass=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mvc?useUnicode=true&characterEncoding=utf-8&autoReconnect=true jdbc.user=root jdbc.password=123 jdbc.dialect=org.hibernate.dialect.MySQL5Dialect #jdbc.dialect=org.hibernate.dialect.MySQLInnoDBDialect jdbc.initialPoolSize=2 jdbc.maxPoolSize=200 jdbc.batch_size=20 jdbc.hbm2ddl.auto=update jdbc.query.substitutions=true 1, false 0, yes ''Y'', no ''N''
Hibernate 在spring中的配置
<?xml version="1.0" encoding="UTF-8"?> <!-- <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> --> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-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/context http://www.springframework.org/schema/context/spring-context-3.1.xsd"> <!-- 配置占位符 --> <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:db.properties" /> </bean> <!-- 数据源 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" abstract="false" lazy-init="default" autowire="default"> <property name="driverClassName" value="${jdbc.driverClass}"/> <property name="url" value="${jdbc.url}"/> <property name="username" value="${jdbc.user}"/> <property name="password" value="${jdbc.password}"/> </bean> <!-- 配置一个sessionFactory --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">${jdbc.dialect}</prop> <prop key="hibernate.hbm2ddl.auto">${jdbc.hbm2ddl.auto}</prop> <prop key="hibernate.jdbc.batch_size">${jdbc.batch_size}</prop> <prop key="hibernate.cache.use_second_level_cache">false</prop> <prop key="hibernate.query.substitutions">${jdbc.query.substitutions}</prop> <prop key="hibernate.show_sql">false</prop> <prop key="hibernate.format_sql">true</prop> </props> </property> <property name="packagesToScan"> <list> <value>com.kwok.springmvc.module.entity</value> </list> </property> </bean> <context:annotation-config/> <context:component-scan base-package="com.kwok.springmvc" /> <bean id="myTxManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory" /> <property name="dataSource" ref="dataSource"/> </bean> <tx:annotation-driven transaction-manager="transactionManager" /> <!-- hibernateTemplate --> <bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> </beans>
step4:接下来都是Entity,Controller,Service,Dao之间的注解来完成业务逻辑,下面是每一个层的注解啦
@Entity
@Table(name="mvc_user")
@Controller
@RequestMapping("/user.do")
@Service("userService")
@Repository("userDao")
step4:Junit4的单元测试
package com.kwok.springmvc.junit; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import org.springframework.test.context.transaction.TransactionConfiguration; import com.kwok.springmvc.module.entity.User; import com.kwok.springmvc.service.UserService; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration({"/applicationContext.xml"}) @TransactionConfiguration(transactionManager="myTxManager",defaultRollback=false) public class ServiceJunit { @Autowired private UserService userService; @Test public void testInsert(){ User user = new User(); user.setName("wfung_kwok2"); user.setPassword("wfung_kwok"); user.setEmail("wfung_kwok@123.com"); user.setStatus(true); userService.insert(user); } @Test public void testGet(){ /*User user = userService.get((long)2); System.out.println(user.getName()); List<User> users = getUserService().findAllByCondition("1=1", null, 0, 0); for(User u : users){ System.out.println(u.getId()); } user.setPassword("!@#$%"); userService.update(user);*/ Object o = userService.queryObjcet("select count(*) from User where 1=1", null); System.out.println((Long)o); } public void setUserService(UserService userService) { this.userService = userService; } }