struts2+spring2.5+hibernate3集成的简单实例

来源：互联网发布：临沂知豆租赁编辑：程序博客网时间：2024/05/10 21:13

本文通过一个向数据库添加和删除的实例来演示3个框架的集成过程。

1.首先编写view层文件index.jsp：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Welcome</title><script type="text/javascript"></script></head> <body> This is my JSP page. <br> <form id="userInfoForm" name="userInfoForm" method="post" onsubmit="return false;"> 用户名: <input name="username" type="text" /> 密码: <input name="password" type="password"> <input name="add" type="button" onclick="btnSubmit(this);" value="增加" /> <input name="res" type="reset" value="重置" /> <input name="delete" type="button" onclick="btnSubmit(this);" value="删除" /> </form> </body></html>

2.在web.xml中配置index.jsp以及配置struts2以响应.do提交和spring的监听类：

<?xml version="1.0" encoding="UTF-8"?><web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"><display-name>SSH</display-name><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><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>*.do</url-pattern> </filter-mapping><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

3.配置applicationContext.xml来实际定位到一个action类:

<?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="LoginAction" class="com.app.web.action.LoginAction " singleton="false"></bean><bean id="LogoutAction" class="com.app.web.action.LogoutAction " singleton="false"></bean></beans>

4.编写action类来测试我们进行的配置是否正确：

package com.app.web.action;public class LoginAction {private String username = ""; private String password = "";public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String execute() {System.out.println("loginaction");return "success";}}

package com.app.web.action;import com.app.web.bean.UserInfo;public class LogoutAction {private String username = ""; private String password = "";public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String execute() {System.out.println("logout");return "success";}}

此时struts2和spring已经完成集成了。

5.进入Hibernate配置阶段，编写要与数据库表映射的Bean类：

package com.app.web.bean;import java.io.Serializable;public class UserInfo implements Serializable{/** * */private static final long serialVersionUID = 2394904699860474046L;private Integer id;private String username;private String password;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}

6.编写Hibernate的映射xml文件，对Bean和数据库表进行映射(UserInfo.hbm.xml)：<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping> <class name="com.app.web.bean.UserInfo" table="userinfo"><id name="id" column="id" type="integer"><generator class="increment"/></id><property name="username" type="string"/><property name="password" type="string"/> </class></hibernate-mapping>

7.编写DAO类来操作数据Bean：

package com.app.DAO;import org.hibernate.Query;import org.hibernate.Session;import org.hibernate.Transaction;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import com.app.web.bean.UserInfo;public class UserInfoDAO extends HibernateDaoSupport {public void save(UserInfo um) {Session ss = getSessionFactory().openSession();Transaction tx = ss.beginTransaction();ss.save(um);tx.commit();ss = null;}public void delete(UserInfo um) {System.out.println("start");Session ss = getSessionFactory().openSession();Transaction tx = ss.beginTransaction();String sql = "delete from UserInfo where username = '"+ um.getUsername() + "'" + "and password='" + um.getPassword() + "'";System.out.println(sql);Query query = ss.createQuery(sql);int result = query.executeUpdate();tx.commit();ss = null;System.out.println("end" + result);}}

此时Hibernate部分进完成了。

8.编写业务逻辑类来操作DAO：

package com.app.service;import com.app.DAO.UserInfoDAO;import com.app.web.bean.UserInfo;public class LoginService {private UserInfoDAO userinfoDAO; public UserInfoDAO getUserinfoDAO() { return userinfoDAO; } public void setUserinfoDAO(UserInfoDAO userinfoDAO) { this.userinfoDAO = userinfoDAO; } public void saveinfo(UserInfo userinfo) { userinfoDAO.save(userinfo); }}

package com.app.service;import com.app.DAO.UserInfoDAO;import com.app.web.bean.UserInfo;public class LogoutService {private UserInfoDAO userinfoDAO;public UserInfoDAO getUserinfoDAO() {return userinfoDAO;}public void setUserinfoDAO(UserInfoDAO userinfoDAO) {this.userinfoDAO = userinfoDAO;}public void deleteInfo(UserInfo userInfo) {userinfoDAO.delete(userInfo);}}

9.在Spring的applicationContext.xml中注入Hibernate的DAO类，业务逻辑类以及启动Hibernate需要的SessionFactory，TransactionManager以及TransactionProxy Bean：

<?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="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:jdbc.properties</value> </list></property> </bean><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"><property name="driverClassName" value="${jdbc.driverClassName}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="initialSize" value="2" /> <property name="maxActive" value="20" /></bean><bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="dataSource"> <ref bean="dataSource" /> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.generate_statistics">true</prop> <prop key="hibernate.connection.release_mode">auto</prop> <prop key="hibernate.autoReconnect">true</prop> </props> </property> <property name="mappingDirectoryLocations"> <list> <value> classpath:com/app/web/bean </value> </list> </property> </bean> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory"> <ref bean="sessionFactory"/> </property> </bean> <bean id="userDAOProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"><property name="transactionManager"><ref bean="transactionManager" /> </property><property name="target"><list><ref local="loginService" /><ref local="logoutService" /></list></property><property name="transactionAttributes"><props><prop key="save*">PROPAGATION_REQUIRED</prop><prop key="delete*">PROPAGATION_REQUIRED</prop><prop key="get*">PROPAGATION_REQUIRED,readOnly</prop><prop key="is*">PROPAGATION_REQUIRED,readOnly</prop></props></property> </bean><bean id="userinfoDAO" class="com.app.DAO.UserInfoDAO"><property name="sessionFactory"><ref local="sessionFactory"/></property> </bean><bean id="loginService" class="com.app.service.LoginService"><property name="userinfoDAO"><ref bean="userinfoDAO" /></property></bean><bean id="logoutService" class="com.app.service.LogoutService"><property name="userinfoDAO"><ref bean="userinfoDAO" /></property></bean><bean id="LoginAction" class="com.app.web.action.LoginAction " singleton="false"><property name="loginService"><ref bean="loginService" /></property></bean><bean id="LogoutAction" class="com.app.web.action.LogoutAction " singleton="false"><property name="logoutService"><ref bean="logoutService" /></property></bean></beans>

10：编写数据源属性文件(jdbc.properties)：

# Properties file with JDBC-related settings.# Applied by PropertyPlaceholderConfigurer from "applicationContext-resources.xml".# Targeted at system administrators, to avoid touching the context XML files.# jdbc.driverClassName=com.mysql.jdbc.Driverjdbc.url=jdbc:mysql://localhost:15000/testjdbc.username=rootjdbc.password=passwd00

11：修正action类，在该类中通过设定一个业务逻辑类来完成添加或删除操作：

package com.app.web.action;import com.app.service.LoginService;import com.app.web.bean.UserInfo;public class LoginAction {private LoginService loginService;private String username = ""; private String password = "";public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public LoginService getLoginService() {return loginService;}public void setLoginService(LoginService loginService) {this.loginService = loginService;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String execute() {UserInfo userInfo = new UserInfo();userInfo.setUsername(username);userInfo.setPassword(password);loginService.saveinfo(userInfo);return "success";}}

package com.app.web.action;import com.app.service.LogoutService;import com.app.web.bean.UserInfo;public class LogoutAction {private LogoutService logoutService;private String username = ""; private String password = "";public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public LogoutService getLogoutService() {return logoutService;}public void setLogoutService(LogoutService logoutService) {this.logoutService = logoutService;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String execute() {UserInfo userInfo = new UserInfo();userInfo.setUsername(username);userInfo.setPassword(password);logoutService.deleteInfo(userInfo);return "success";}}

此时Spring和Hibernate就完成的集成。3个框架也完成了集成。启动tomcat进行测试吧。好的开始！

编写过程中遇到的几个问题：

(1)struts.xml配置package节点时，没有指定extends="struts-default"，启动服务时报错，无法进行form提交去访问资源；

(2)要想响应.do，还必须在struts.xml中追加<constant name="struts.action.extension" value="do" />节点，默认是.action；

(3)在进行DAO类中删除记录的编写时，没有导入antlr-2.7.6.jar包，导致java.lang.reflect.InvocationTargetException；

(4)在进行DAO类中删除记录的编写时,使用的表名是数据库中的名字，而Hibernate是根据类名进行查询的，所以会not map 错误。