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  • SSH框架整合教程


    考虑到有些读者刚刚接触J2ee,特发此文,顺便让自己复习复习

    先给源码,建议大家对照着源码看下面的教程!

    链接:SSH框架完美整合源码下载

    另附一篇讲解SSH的博文


    下面是教程

    整合分为两个步骤

    1.Spring集成Hibernate

    2.Struts2集成Spring

    注意

    1. 每整合一项都要进行针对性测试
    2. jar包导入不要导入两个版本不同功能重复的包


    一.Spring集成Hibernate

    导入Jar包

    Hibernate相关Jar包


    Spring相关Jar包  

    这里导入C3P0的jar包是因为要使用C3P0的JDBC连接池


    Mysql


    Beans.xml配置文件

    配置aop和事务

    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx=http://www.springframework.org/schema/tx
    
    http://www.springframework.org/schema/aop 
    http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
    http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"
    

    自动扫描方式加载对象

    <context:component-scan base-package="cn.hzy"/>

    配置c3p0数据源

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
    		<property name="driverClass" value="org.gjt.mm.mysql.Driver"/>
    		<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/itcast?useUnicode=true&characterEncoding=UTF-8"/>
    		<property name="user" value="root"/>
    		<property name="password" value="123456"/>
    		<!--初始化时获取的连接数,取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
    		<property name="initialPoolSize" value="1"/>
    		<!--连接池中保留的最小连接数。-->
    		<property name="minPoolSize" value="1"/>	
    		<!--连接池中保留的最大连接数。Default: 15 -->
    		<property name="maxPoolSize" value="300"/>
    		<!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->
    		<property name="maxIdleTime" value="60"/>	
    		<!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
    		<property name="acquireIncrement" value="5"/>	
    		<!--每60秒检查所有连接池中的空闲连接。Default: 0 -->
    		<property name="idleConnectionTestPeriod" value="60"/>
    </bean>
    

    配置sessionFactory(单例)

    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    		<property name="dataSource" ref="dataSource"/>
    		 <property name="mappingResources">
    			    <list>
    			      <value>cn/hzy/domain/Employee.hbm.xml</value>
    			    </list>
    		</property>
    		 <property name="hibernateProperties">
    			 <value>
    			      hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
    			      hibernate.hbm2ddl.auto=update
    			      hibernate.show_sql=false
    			      hibernate.format_sql=false
    			  </value>
    		 </property>
    </bean>
    


    配置事务

    <!-- 配置事务管理器 -->
    	<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    		<property name="sessionFactory" ref="sessionFactory"/>
    	</bean>
    	<!-- 使用注解配置事务 -->
    	<tx:annotation-driven transaction-manager="txManager"/>
    


    JavaBean对象创建

    创建Employee JavaBean类

           这里故意提高难度,给对象设置一个枚举类型的属性,看看在Hibernate中怎么配置

           枚举类型private Gender gender = Gender.MAN;

     

    Employee.hbm.xml配置文件(映射枚举类型)

    <property name="gender" not-null="true">
    		    <type name="prg.hibernate.type.EnumType">
    		        <param name="enumClass">cn.hzy.domain.Gender</param>
    		        <!-- 12代表varchar类型,即保存实际值,若不提供type参数,则保存枚举值的索引到数据库 -->
    		        <param name="type">12</param>
    		    </type>
    </property>
    


    Service层编写

     

    EmployeeService

    public interface EmployeeService {
    	public void save(Employee employee);
    	public void update(Employee employee);
    	public Employee find(String username);
    	public void delete(String... usernames);
    	public List<Employee> list();
    }
    

    EmployeeServiceImpl

    //使用自动自动扫描方式加载对象  //事务
    @Service @Transactional
    public class EmployeeServiceImpl implements EmployeeService{
    	//使用注解方式加载对象
    	@Resource SessionFactory factory;
    	
    	public void delete(String... usernames) {
    		for(String username : usernames){
    			factory.getCurrentSession().delete(factory.getCurrentSession().load(Employee.class, username));
    		}
    	}
    	//取消事务
    	@Transactional(propagation=Propagation.NOT_SUPPORTED)
    	public Employee find(String username) {
    		return (Employee)factory.getCurrentSession().get(Employee.class, username);
    	}
    
    	@SuppressWarnings("unchecked")
    	@Transactional(propagation=Propagation.NOT_SUPPORTED)
    	public List<Employee> list() {		
    		return factory.getCurrentSession().createQuery("from Employee").list();
    	}
        
    	public void save(Employee employee) {
    		factory.getCurrentSession().persist(employee);
    	}
    
    	public void update(Employee employee) {
    		factory.getCurrentSession().merge(employee);
    	}
    }
    

    测试EmployeeServiceImplTest

     

    看看一下代码能否获取employeeServiceImpl

    ApplicationContext act = new ClassPathXmlApplicationContext("beans.xml");
    employeeService = (EmployeeService)act.getBean("employeeServiceImpl");
    


    二.Struts2集成Spring

    导入Jar包 

    注意防止jar重复


    另外




    Web.xml实例化Spring容器

    <!-- 指定spring的配置文件,默认从web根目录寻找配置文件,我们可以通过spring提供的classpath:前缀指定从类路径下寻找 -->
    	<context-param>
    	   <param-name>contextConfigLocation</param-name>
    	   <param-value>classpath:beans.xml</param-value>
    	</context-param>
    	<!-- 对Spring容器进行实例化 Spring容器放在application范围 -->
    	<listener>
    	      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    	</listener>
    

    Web.xml配置Struts

    <filter>
            <filter-name>struts2</filter-name>
            <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
        </filter>
        <filter-mapping>
            <filter-name>struts2</filter-name>
            <url-pattern>/*</url-pattern>
    </filter-mapping>
    


    Struts.xml

    <!-- 指定Action对象由谁创建 -->
    <constant name="struts.objectFactory" value="spring"></constant>
    配置Action  不用写全名,因为已经交给Spring管理
    	<package name="employee" namespace="/employee" extends="struts-default">
    	    <action name="list" class="employeeAction">
    	        <result name="list">/WEB-INF/page/employee.jsp</result>
    	    </action>
    	</package>
    

    创建Action类EmployeeAction

    @Service
    public class EmployeeAction {
    	@Resource EmployeeService employeeService;
    	
    	public String execute(){
    		ActionContext.getContext().put("empList", employeeService.list());
    		return "list";
    	}
    }
    


    测试

    http://localhost:8080/MySSH/employee/list





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  • 原文地址:https://www.cnblogs.com/javdroider/p/5184326.html
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