- <span style="font-family: Arial, Helvetica, sans-serif; white-space: normal; background-color: rgb(255, 255, 255); ">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</span>
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;
- }
- }