SSH【史上最详细整合】

淡淡的烟草味﹌ 2021-09-30 18:48 569阅读 0赞

最详细搭建SSH框架环境

本博文主要是讲解如何搭建一个比较规范的SSH开发环境，以及对它测试【在前面的搭建中，只是整合了SSH框架，能够使用SSH实现功能】，而这次是相对规范的。

导入开发包

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在Struts配置文件中添加常量

  1.    <!-- 禁用动态方法访问 -->    <constant name="struts.enable.DynamicMethodInvocation" value="false" />    <!-- 配置成开发模式 -->    <constant name="struts.devMode" value="true" />    <!-- 配置拓展名为action -->    <constant name="struts.action.extention" value="action" />    <!-- 把主题配置成simple -->    <constant name="struts.ui.theme" value="simple" />
  2.     <constant name="struts.enable.DynamicMethodInvocation" value="false" />
  3.     <!-- 配置成开发模式 -->
  4.     <constant name="struts.devMode" value="true" />
  5.     <!-- 配置拓展名为action -->
  6.     <constant name="struts.action.extention" value="action" />
  7.     <!-- 把主题配置成simple -->
  8.     <constant name="struts.ui.theme" value="simple" />

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添加struts2过滤器

  1. <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>*.action</url-pattern>    </filter-mapping>
  2.         <filter-name>struts2</filter-name>    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  3.     </filter>
  5.     <filter-mapping>
  6.         <filter-name>struts2</filter-name>
  7.         <url-pattern>*.action</url-pattern>
  8.     </filter-mapping>

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添加Spring配置文件

把Spring的配置文件添加到src的目录下：

  1. <?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"       xmlns:aop="http://www.springframework.org/schema/aop"       xmlns:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"></beans>
  2. <beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx"       xmlns:aop="http://www.springframework.org/schema/aop"       xmlns:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
  3. </beans>

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注册监听器

在web.xml文件中注册监听器：

  1.    <listener>       <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:applicationContext.xml</param-value>    </context-param>
  2.        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  3.     </listener>
  4.     <context-param>
  5.         <param-name>contextConfigLocation</param-name>
  6.         <param-value>classpath:applicationContext.xml</param-value>
  7.     </context-param>

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测试SSH

我们会一般会新建一个test包来测试，与src是平级的。

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Struts2和Spring

预期：如果可以在action中能够正确调用service里面的方法执行并返回到一个页面中；那么我们认定struts和spring的整合是成功的。

测试IOC容器

  1.    private ClassPathXmlApplicationContext context;    @Test    public void load() {        context = new ClassPathXmlApplicationContext("bean.xml");        System.out.println(context);    }
  3.     @Test
  4.     public void load() {
  7.         context = new ClassPathXmlApplicationContext("bean.xml");
  9.         System.out.println(context);
  11.     }

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测试Spring

  1. package zhongfucheng.test.service;/** * Created by ozc on 2017/5/22. */public interface TestService {     void say();}
  3. /** * Created by ozc on 2017/5/22. */
  4. public interface TestService {
  6.      void say();
  7. }
  9. package zhongfucheng.test.service.impl;import org.springframework.stereotype.Service;/** * Created by ozc on 2017/5/22. */@Servicepublic class TestServiceImpl implements zhongfucheng.test.service.TestService {    @Override    public void say() {        System.out.println("hi ");    }}
  11. import org.springframework.stereotype.Service;
  13. /** * Created by ozc on 2017/5/22. */
  15. @Service
  16. public class TestServiceImpl implements zhongfucheng.test.service.TestService {
  18.     @Override
  19.     public void say() {
  21.         System.out.println("hi ");
  22.     }
  23. }
  25.    <context:component-scan base-package="zhongfucheng.test"/>

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  1.    <import resource="classpath:zhongfucheng/test/config/test-spring.xml"/>

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  1.    @Test    public void testSpring() {        TestService testService = (TestService) context.getBean("testServiceImpl");        System.out.println(testService);    }
  2.     public void testSpring() {
  5.         TestService testService = (TestService) context.getBean("testServiceImpl");
  6.         System.out.println(testService);
  7.     }

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测试Struts

创建action目录，创建TestAction

  1. package zhongfucheng.test.action;import com.opensymphony.xwork2.ActionSupport;/** * Created by ozc on 2017/5/22. */public class TestAction extends ActionSupport {    public String test2()  {        return SUCCESS;    }}
  3. import com.opensymphony.xwork2.ActionSupport;
  5. /** * Created by ozc on 2017/5/22. */
  6. public class TestAction extends ActionSupport {
  9.     public String test2()  {
  11.         return SUCCESS;
  12.     }
  13. }

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在config下多添加一个Struts的配置文件，配置对应的信息。在Class中要么我们在配置Action的时候把对象交给Spring管理，要么就直接写上类的全名交给Struts2管理。这两种方式都是可以的！【这里我们使用的是把对象交给Struts2管理，Spring是可以感知的，因为我们导入了Struts2-Spring.jar包】

  1. <?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"        "http://struts.apache.org/dtds/struts-2.0.dtd"><struts>    <package name="test" namespace="/" extends="struts-default">        <action name="test_*" class="zhongfucheng.test.action.TestAction" method="{1}">            <result name="success">/WEB-INF/jsp/test/test.jsp</result>        </action>    </package></struts>
  3. <!DOCTYPE struts PUBLIC        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"        "http://struts.apache.org/dtds/struts-2.0.dtd">
  5. <struts>
  7.     <package name="test" namespace="/" extends="struts-default">
  8.         <action name="test_*" class="zhongfucheng.test.action.TestAction" method="{1}">
  9.             <result name="success">/WEB-INF/jsp/test/test.jsp</result>
  10.         </action>
  11.     </package>
  13. </struts>

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当然了，在Struts2的总配置文件中也要把test中的Struts配置文件引入

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在WEB-INF下创建专门管理JSP的目录，其中创建用于测试的test.jsp

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  1. public class TestAction extends ActionSupport {    @Qualifier("testServiceImpl")    @Autowired    private TestService service;    public String test2() {        service.say();        return SUCCESS;    }}class TestAction extends ActionSupport {
  5.     @Qualifier("testServiceImpl")
  6.     @Autowired
  7.     private TestService service;
  8.     public String test2() {
  10.         service.say();
  11.         return SUCCESS;
  12.     }
  13. }

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整合hibernate和spring

C3P0连接池

  1. <!-- 导入外部的properties配置文件 -->    <context:property-placeholder location="classpath:db.properties" />    <!-- 配置c3p0数据源 -->    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">        <property name="jdbcUrl" value="${jdbcUrl}"></property>        <property name="driverClass" value="${driverClass}"></property>        <property name="user" value="${user}"></property>        <property name="password" value="${password}"></property>        <!--初始化时获取三个连接，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->        <property name="initialPoolSize" value="${initialPoolSize}"></property>        <!--连接池中保留的最小连接数。Default: 3 -->        <property name="minPoolSize" value="3"></property>        <!--连接池中保留的最大连接数。Default: 15 -->        <property name="maxPoolSize" value="${maxPoolSize}"></property>        <!--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="3"></property>        <!--最大空闲时间，1800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="1800"></property>    </bean>
  2.     <context:property-placeholder location="classpath:db.properties" />
  4.     <!-- 配置c3p0数据源 -->
  5.     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
  6.         <property name="jdbcUrl" value="${jdbcUrl}"></property>
  7.         <property name="driverClass" value="${driverClass}"></property>
  8.         <property name="user" value="${user}"></property>
  9.         <property name="password" value="${password}"></property>
  10.         <!--初始化时获取三个连接，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
  11.         <property name="initialPoolSize" value="${initialPoolSize}"></property>
  12.         <!--连接池中保留的最小连接数。Default: 3 -->
  13.         <property name="minPoolSize" value="3"></property>
  14.         <!--连接池中保留的最大连接数。Default: 15 -->
  15.         <property name="maxPoolSize" value="${maxPoolSize}"></property>
  16.         <!--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 -->
  17.         <property name="acquireIncrement" value="3"></property>
  18.         <!--最大空闲时间，1800秒内未使用则连接被丢弃，若为0则永不丢弃。Default: 0 -->
  19.         <property name="maxIdleTime" value="1800"></property>
  20.     </bean>
  22. jdbcUrl=jdbc:mysql://localhost:3306/SSH03?useUnicode=true&characterEncoding=utf8driverClass=com.mysql.jdbc.Driveruser=rootpassword=rootinitialPoolSize=10maxPoolSize=30
  23. user=root
  24. password=root
  25. initialPoolSize=10
  26. maxPoolSize=30

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sessionFactory

  1.    <bean id="sessionFactory"          class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">        <property name="dataSource" ref="dataSource"></property>        <property name="hibernateProperties">            <props>                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>                <prop key="hibernate.show_sql">true</prop>                <prop key="hibernate.hbm2ddl.auto">update</prop>                <prop key="javax.persistence.validation.mode">none</prop>            </props>        </property>        <property name="mappingLocations">            <list>                <value>classpath:zhongfucheng/test/entity/*.hbm.xml</value>            </list>        </property>    </bean>
  2.         <property name="dataSource" ref="dataSource"></property>
  3.         <property name="hibernateProperties">
  4.             <props>
  5.                 <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
  6.                 <prop key="hibernate.show_sql">true</prop>
  7.                 <prop key="hibernate.hbm2ddl.auto">update</prop>
  8.                 <prop key="javax.persistence.validation.mode">none</prop>
  9.             </props>
  10.         </property>
  11.         <property name="mappingLocations">
  12.             <list>
  13.                 <value>classpath:zhongfucheng/test/entity/*.hbm.xml</value>
  14.             </list>
  15.         </property>
  16.     </bean>

测试Spring与Hibernate

  1. package zhongfucheng.test.entity;/** * Created by ozc on 2017/5/22. */public class Person implements Serializable {    private String id;    private String username;    public Person() {    }    public Person(String username) {        this.username = username;    }    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }}
  3. /** * Created by ozc on 2017/5/22. */
  4. public class Person implements Serializable {
  7.     private String id;
  8.     private String username;
  9.     public Person() {
  11.     }
  12.     public Person(String username) {
  14.         this.username = username;
  16.     }
  18.     public String getId() {
  20.         return id;
  21.     }
  23.     public void setId(String id) {
  25.         this.id = id;
  26.     }
  28.     public String getUsername() {
  30.         return username;
  31.     }
  33.     public void setUsername(String username) {
  35.         this.username = username;
  36.     }
  37. }

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  1. <?xml version="1.0" encoding="utf-8"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping>    <class name="zhongfucheng.test.entity.Person" table="person">        <id name="id" type="java.lang.String">            <column name="id" length="32" />            <generator class="uuid.hex" />        </id>        <property name="username" type="java.lang.String">            <column name="username" length="20" not-null="true" />        </property>    </class></hibernate-mapping>
  2. <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
  4. <hibernate-mapping>
  5.     <class name="zhongfucheng.test.entity.Person" table="person">
  6.         <id name="id" type="java.lang.String">
  7.             <column name="id" length="32" />
  8.             <generator class="uuid.hex" />
  9.         </id>
  10.         <property name="username" type="java.lang.String">
  11.             <column name="username" length="20" not-null="true" />
  12.         </property>
  13.     </class>
  14. </hibernate-mapping>
  16.    @Test    public void testHibernate() {        SessionFactory factory = (SessionFactory) context.getBean("sessionFactory");        Session session = factory.openSession();        session.beginTransaction();        session.save(new Person("人员1"));        session.getTransaction().commit();        session.close();    }
  17.     public void testHibernate() {
  20.         SessionFactory factory = (SessionFactory) context.getBean("sessionFactory");
  22.         Session session = factory.openSession();
  23.         session.beginTransaction();
  25.         session.save(new Person("人员1"));
  27.         session.getTransaction().commit();
  28.         session.close();
  29.     }

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测试框架分层的整合(service与dao)

创建TestDao接口，创建TestDaoImpl实例，继承HibernateDaoSupport这个类【方便开发】，实现TestDao接口

  1. public class TestDaoImpl extends HibernateDaoSupport implements TestDao {    @Override    public void save(Person person) {        getHibernateTemplate().save(person);    }}class TestDaoImpl extends HibernateDaoSupport implements TestDao {
  4.     @Override
  5.     public void save(Person person) {
  7.         getHibernateTemplate().save(person);
  8.     }
  9. }

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值得注意的是：继承了HibernateDaoSupport这个类，这个类是需要SessionFactory的，通过注解的方式给不了【给属性的话，属性只与TestDaoImpl相关，而HibernateDaoSupport的setFactory()被定义了final】，因此只能通过XML的方式来配置【XML配置TestDaoImpl，TestDaoImpl是拥有setFactory方法的，不能改写，但是能通过XML注入呀】

  1.    <bean id="testDaoImpl" class="zhongfucheng.test.dao.impl.TestDaoImpl">        <property name="sessionFactory" ref="sessionFactory"></property>    </bean>
  2.         <property name="sessionFactory" ref="sessionFactory"></property>
  3.     </bean>

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  1. @Servicepublic class TestServiceImpl implements zhongfucheng.test.service.TestService {    @Autowired    private TestDao testDaoImpl;    @Override    public void save(Person person) {        testDaoImpl.save(person);    }}
  2. public class TestServiceImpl implements zhongfucheng.test.service.TestService {
  6.     @Autowired
  7.     private TestDao testDaoImpl;
  8.     @Override
  9.     public void save(Person person) {
  11.         testDaoImpl.save(person);
  12.     }
  13. }
  15.    @Test    public void testMVC() {        TestService service = (TestService) context.getBean("testServiceImpl");        service.save(new Person("人员2"));    }
  16.     public void testMVC() {
  19.         TestService service = (TestService) context.getBean("testServiceImpl");
  20.         service.save(new Person("人员2"));
  21.     }

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测试Spring事务

在Spring的总配置文件下添加以下配置：

  1.    <bean id="txManager"          class="org.springframework.orm.hibernate3.HibernateTransactionManager">        <property name="sessionFactory" ref="sessionFactory" />    </bean>    <tx:advice id="txAdvice" transaction-manager="txManager">        <tx:attributes>            <tx:method name="find*" read-only="true" />            <tx:method name="get*" read-only="true" />            <tx:method name="load*" read-only="true" />            <tx:method name="list*" read-only="true" />            <tx:method name="search*" read-only="true" />            <tx:method name="*" rollback-for="Throwable" />        </tx:attributes>    </tx:advice>    <aop:config>        <aop:pointcut id="serviceOperation" expression="bean(*Service*)" />        <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceOperation" />    </aop:config>    <!-- 所有业务配置文件都要用到sessionFactory，那么这个就是专门来创建sessionFactory的，其他的业务配置文件指定parent就有了该属性 -->    <!-- 所有业务dao的parent -->    <bean id="baseDao" abstract="true">        <property name="sessionFactory" ref="sessionFactory"></property>    </bean>
  2.         <property name="sessionFactory" ref="sessionFactory" />
  3.     </bean>
  5.     <tx:advice id="txAdvice" transaction-manager="txManager">
  6.         <tx:attributes>
  7.             <tx:method name="find*" read-only="true" />
  8.             <tx:method name="get*" read-only="true" />
  9.             <tx:method name="load*" read-only="true" />
  10.             <tx:method name="list*" read-only="true" />
  11.             <tx:method name="search*" read-only="true" />
  12.             <tx:method name="*" rollback-for="Throwable" />
  13.         </tx:attributes>
  14.     </tx:advice>
  16.     <aop:config>
  17.         <aop:pointcut id="serviceOperation" expression="bean(*Service*)" />
  18.         <aop:advisor advice-ref="txAdvice" pointcut-ref="serviceOperation" />
  19.     </aop:config>
  21.     <!-- 所有业务配置文件都要用到sessionFactory，那么这个就是专门来创建sessionFactory的，其他的业务配置文件指定parent就有了该属性 -->
  22.     <!-- 所有业务dao的parent -->
  23.     <bean id="baseDao" abstract="true">
  24.         <property name="sessionFactory" ref="sessionFactory"></property>
  25.     </bean>

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  1. @Servicepublic class TestServiceImpl implements zhongfucheng.test.service.TestService {    @Autowired    private TestDao testDaoImpl;    @Override    public void save(Person person) {        testDaoImpl.save(person);        int i = 1 / 0;    }}
  2. public class TestServiceImpl implements zhongfucheng.test.service.TestService {
  6.     @Autowired
  7.     private TestDao testDaoImpl;
  8.     @Override
  9.     public void save(Person person) {
  11.         testDaoImpl.save(person);
  12.         int i = 1 / 0;
  13.     }
  14. }
  16.    @Test    public void testTx() {        TestService service = (TestService) context.getBean("testServiceImpl");        service.save(new Person("人员3"));    }
  17.     public void testTx() {
  20.         TestService service = (TestService) context.getBean("testServiceImpl");
  21.         service.save(new Person("人员3"));
  22.     }

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配置log4j

我们发现，每当使用Junit测试的时候都出现了以下的红色信息，虽然对我们的功能没有任何影响：

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它出现的原因是没有配置log4j，其实log4j对我们很有用。可以根据日志文件来找到对应的错误，我们在开发中也应该使用它。

要配置log4j，要导入jar包：com.springsource.org.apache.log4j-1.2.15.jar【在导入SSH的jar包中已经存在了】

配置log4j.properties

  1. log4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.Target=System.outlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p [%t] %c{1}:%L - %m%n#默认从warn开始log4j.rootLogger=warn, stdout, Rlog4j.logger.zhongfucheng=debuglog4j.appender.R=org.apache.log4j.DailyRollingFileAppender#R.File是把日志信息输出到哪里log4j.appender.R.File=D:/itcast/itcast.loglog4j.appender.R.layout=org.apache.log4j.PatternLayoutlog4j.appender.R.layout.ConversionPattern=%d [%t] %5p  %c - %m%n
  2. log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
  3. log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p [%t] %c{1}:%L - %m%n
  5. #默认从warn开始
  6. log4j.rootLogger=warn, stdout, R
  8. log4j.logger.zhongfucheng=debug
  10. log4j.appender.R=org.apache.log4j.DailyRollingFileAppender
  12. #R.File是把日志信息输出到哪里
  13. log4j.appender.R.File=D:/itcast/itcast.log
  14. log4j.appender.R.layout=org.apache.log4j.PatternLayout
  15. log4j.appender.R.layout.ConversionPattern=%d [%t] %5p  %c - %m%n

640?wx\_fmt=png 这里写图片描述

输出到硬盘的日志文件：

640?wx\_fmt=png 这里写图片描述

编写基类BaseDao

  1. package zhongfucheng.core.dao;import java.io.Serializable;import java.util.List;public interface BaseDao<T> {    //新增    public void save(T entity);    //更新    public void update(T entity);    //根据id删除    public void delete(Serializable id);    //根据id查找    public T findObjectById(Serializable id);    //查找列表    public List<T> findObjects();}
  3. import java.io.Serializable;
  4. import java.util.List;
  6. public interface BaseDao<T> {
  8.     //新增
  9.     public void save(T entity);
  10.     //更新
  11.     public void update(T entity);
  12.     //根据id删除
  13.     public void delete(Serializable id);
  14.     //根据id查找
  15.     public T findObjectById(Serializable id);
  16.     //查找列表
  17.     public List<T> findObjects();
  18. }
  20. package zhongfucheng.core.dao.impl;import org.hibernate.Query;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import zhongfucheng.core.dao.BaseDao;import java.io.Serializable;import java.lang.reflect.ParameterizedType;import java.util.List;public abstract class BaseDaoImpl<T> extends HibernateDaoSupport implements BaseDao<T> {    Class<T> clazz;    public BaseDaoImpl(){        ParameterizedType pt =  (ParameterizedType)this.getClass().getGenericSuperclass();//BaseDaoImpl<User>        clazz = (Class<T>)pt.getActualTypeArguments()[0];    }    @Override    public void save(T entity) {        getHibernateTemplate().save(entity);    }    @Override    public void update(T entity) {        getHibernateTemplate().update(entity);    }    @Override    public void delete(Serializable id) {        getHibernateTemplate().delete(findObjectById(id));    }    @Override    public T findObjectById(Serializable id) {        return getHibernateTemplate().get(clazz, id);    }    @Override    public List<T> findObjects() {        Query query = getSession().createQuery("FROM " + clazz.getSimpleName());        return query.list();    }}
  22. import org.hibernate.Query;
  23. import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
  24. import zhongfucheng.core.dao.BaseDao;
  26. import java.io.Serializable;
  27. import java.lang.reflect.ParameterizedType;
  28. import java.util.List;
  31. public abstract class BaseDaoImpl<T> extends HibernateDaoSupport implements BaseDao<T> {
  34.     Class<T> clazz;
  36.     public BaseDaoImpl(){
  38.         ParameterizedType pt =  (ParameterizedType)this.getClass().getGenericSuperclass();//BaseDaoImpl<User>
  39.         clazz = (Class<T>)pt.getActualTypeArguments()[0];
  40.     }
  42.     @Override
  43.     public void save(T entity) {
  45.         getHibernateTemplate().save(entity);
  46.     }
  48.     @Override
  49.     public void update(T entity) {
  51.         getHibernateTemplate().update(entity);
  52.     }
  54.     @Override
  55.     public void delete(Serializable id) {
  57.         getHibernateTemplate().delete(findObjectById(id));
  58.     }
  60.     @Override
  61.     public T findObjectById(Serializable id) {
  63.         return getHibernateTemplate().get(clazz, id);
  64.     }
  66.     @Override
  67.     public List<T> findObjects() {
  69.         Query query = getSession().createQuery("FROM " + clazz.getSimpleName());
  70.         return query.list();
  71.     }
  73. }

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