屬性singleton="false"，指明了Action 的實例獲取方式為每次重新創建。解決了Struts中令人詬病的線程安全問題（Struts中，由一個Action實例處理所有的請求，這就導致了類公用資源在并發請求中的線程同步問題。）（摘自spring開發指南）
建立數據庫在 這里我使用的是mysql4.1.13
CREATE TABLE `user` (
`ID` int(11) NOT NULL auto_increment,
`USERNAME` varchar(50) NOT NULL default '',
`PASSWORD` varchar(50) NOT NULL default '',
PRIMARY KEY (`ID`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
添加記錄 insert into user (USERNAME,PASSWORD) values ('test','test')
創建Hibernate框架
在配置界面中配置數據庫的連接部份，重要的是點擊鏈接將jdbc拷貝到lib目錄中
使用MyEclipse的數據Database Explorer工具創建User.hmb.xml、AbstractUser.java、User.java映射文件
創建完成后可以將自動生成的hibernate.cfg.xml刪除
創建UserDAO.java、UserDAOImp.java
UserDAO.java
public interface UserDAO {
public abstract boolean isValidUser(String username, String password);
}
UserDAOImp.java
import java.util.List;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import com.test.Hibernate.SessionFactory;
public class UserDAOImp extends HibernateDaoSupport implements UserDAO {
private SessionFactory sessionFactory;
private static String hql = "from User u where u.username=? ";
public boolean isValidUser(String username, String password) {
List userList = this.getHibernateTemplate().find(hql, username);
if (userList.size() > 0) {
return true;
}
return false;
}
}
修改LoginAction.java文件，使用userDao的方法來進行用戶驗證
package com.test.struts.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.validator.DynaValidatorForm;
import com.test.UserDAO;
public class LoginAction extends Action {
private UserDAO userDAO;
public UserDAO getUserDAO() {
return userDAO;
}
public void setUserDAO(UserDAO userDAO) {
this.userDAO = userDAO;
}
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
DynaValidatorForm loginForm = (DynaValidatorForm) form;
// TODO Auto-generated method stub
String username = (String) loginForm.get("username");
String password = (String) loginForm.get("password");
loginForm.set("password", null);
if (userDAO.isValidUser(username,password)) {
return mapping.findForward("indexGo");
} else {
return mapping.getInputForward();
}
}
}
綠色字體為修改部份
現在剩下最后的spring配置了
<beans>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName">
<value>com.mysql.jdbc.Driver</value>
</property>
<property name="url">
<value>jdbc:mysql://localhost/test</value>
</property>
<property name="username">
<value>root</value>
</property>
<property name="password">
<value>root</value>
</property>
</bean>
<!-- 配置sessionFactory, 注意這里引入的包的不同 -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref local="dataSource" />
</property>
<property name="mappingResources">
<list>
<value>com/test/Hibernate/User.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<bean id="userDAO" class="com.test.UserDAOImp">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<bean id="userDAOProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<property name="target">
<ref local="userDAO" />
</property>
<property name="transactionAttributes">
<props>
<prop key="insert*">PROPAGATION_REQUIRED</prop>
<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="is*">PROPAGATION_REQUIRED,readOnly</prop>
</props>
</property>
</bean>
<bean name="/login" class="com.test.struts.action.LoginAction" singleton="false">
<property name="userDAO">
<ref bean="userDAOProxy" />
</property>
</bean>
</beans>
現在可以進行測試了！
在編寫代碼有配置內容時一定要注意 hibernate 和 hibernate3 ，這兩個包的名字就只差一個字，千萬不要有錯，否則找錯誤可是很難的。