當(dāng)提交到/login.do是將控制權(quán)交給了spring，然后由spring來(lái)決定是否轉(zhuǎn)回到struts的Action
屬性singleton="false"，指明了Action 的實(shí)例獲取方式為每次重新創(chuàng)建。解決了Struts中令人詬病的線程安全問(wèn)題（Struts中，由一個(gè)Action實(shí)例處理所有的請(qǐng)求，這就導(dǎo)致了類(lèi)公用資源在并發(fā)請(qǐng)求中的線程同步問(wèn)題。）（摘自spring開(kāi)發(fā)指南）
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建立數(shù)據(jù)庫(kù)在 這里我使用的是mysql4.1.13
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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;
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添加記錄 insert into user (USERNAME,PASSWORD) values ('test','test')
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創(chuàng)建Hibernate框架
在配置界面中配置數(shù)據(jù)庫(kù)的連接部份，重要的是點(diǎn)擊鏈接將jdbc拷貝到lib目錄中
使用MyEclipse的數(shù)據(jù)Database Explorer工具創(chuàng)建User.hmb.xml、AbstractUser.java、User.java映射文件
創(chuàng)建完成后可以將自動(dòng)生成的hibernate.cfg.xml刪除
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創(chuàng)建UserDAO.java、UserDAOImp.java
UserDAO.java
public interface UserDAO {
?? public abstract boolean isValidUser(String username, String password);
}
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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;
??? }
}
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修改LoginAction.java文件，使用userDao的方法來(lái)進(jìn)行用戶驗(yàn)證
package com.test.struts.action;
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import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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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;
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import com.test.UserDAO;
public class LoginAction extends Action {
?private UserDAO userDAO;
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?public UserDAO getUserDAO() {
??return userDAO;
?}
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?public void setUserDAO(UserDAO userDAO) {
??this.userDAO = userDAO;
?}
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?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
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現(xiàn)在剩下最后的spring配置了
<?xml?version="1.0"?encoding="UTF-8"?>
<!DOCTYPE?beans?PUBLIC?"-//SPRING//DTD?BEAN//EN"?"http://www.springframework.org/dtd/spring-beans.dtd">
<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(xiàn)在可以進(jìn)行測(cè)試了！
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在編寫(xiě)代碼有配置內(nèi)容時(shí)一定要注意 hibernate 和 hibernate3 ，這兩個(gè)包的名字就只差一個(gè)字，千萬(wàn)不要有錯(cuò)，否則找錯(cuò)誤可是很難的。