Spring08 ssh整合
一.spring和hibernate进行整合
创建web项目，引入所需要的jar包
创建对应的数据库
创建数据库对应的实体类以及映射文件
public class Teacher {
private Integer tId; //编号
private Integer tage; //年龄
private String tName;//姓名
private Date tDate;
@Override
public String toString() {
return "Teacher [tId=" + tId + ", tage=" + tage + ", tName=" + tName
+ ", tDate=" + tDate + "]";
}
public Teacher() {
super();
}
public Teacher(Integer tId, Integer tage, String tName, Date tDate) {
super();
this.tId = tId;
this.tage = tage;
this.tName = tName;
this.tDate = tDate;
}
public Integer gettId() {
return tId;
}
public void settId(Integer tId) {
this.tId = tId;
}
public Integer getTage() {
return tage;
}
public void setTage(Integer tage) {
this.tage = tage;
}
public String gettName() {
return tName;
}
public void settName(String tName) {
this.tName = tName;
}
public Date gettDate() {
return tDate;
}
public void settDate(Date tDate) {
this.tDate = tDate;
}
}
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.bdqn.bean">
<class name="Teacher">
<id name="tId">
<generator class="increment"></generator>
</id>
<property name="tName"/>
<property name="tage"/>
<property name="tDate"/>
</class>
</hibernate-mapping>
创建对应的dao层文件
public interface TeacherDao {
//新增
void addTeacher(Teacher teacher);
//删除
void deleteTeacher(Teacher teacher);
//修改
void updateTeacher(Teacher teacher);
//查询
List<Teacher> findTeachers();
}
/**
* HibernateDaoSupport:是spring为hibernate提供的工具类
* getHibernateTemplate（）是获取模版！
* 什么时候给它赋值的？？？？
* spring容器 通过setHibernateTemplate!
*/
public class TeacherDaoImpl extends HibernateDaoSupport implements TeacherDao {
// 新增
public void addTeacher(Teacher teacher) {
getHibernateTemplate().save(teacher);
}
// 删除
public void deleteTeacher(Teacher teacher){
getHibernateTemplate().delete(teacher);
}
// 修改
public void updateTeacher(Teacher teacher){
getHibernateTemplate().update(teacher);
}
// 查询
public List<Teacher> findTeachers(){
return getHibernateTemplate().find("from Teacher");
}
}
创建对应的service层文件
public interface TeacherService {
// 新增
void addTeacher(Teacher teacher);
// 删除
void deleteTeacher(Teacher teacher);
// 修改
void updateTeacher(Teacher teacher);
// 查询
List<Teacher> findTeachers();
}
public class TeacherServiceImpl implements TeacherService {
private TeacherDao dao;
//新增
public void addTeacher(Teacher teacher) {
dao.addTeacher(teacher);
}
//删除
public void deleteTeacher(Teacher teacher) {
dao.deleteTeacher(teacher);
}
//修改
public void updateTeacher(Teacher teacher) {
dao.updateTeacher(teacher);
}
//查询所有
public List<Teacher> findTeachers() {
return dao.findTeachers();
}
public TeacherDao getDao() {
return dao;
}
public void setDao(TeacherDao dao) {
this.dao = dao;
}
}
创建spring的配置文件以及需要的properties文件
<?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:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.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">
<!-- 配置数据源 dbcp数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${driverClass}" />
<property name="url" value="${jdbcUrl}" />
<property name="username" value="${user}" />
<property name="password" value="${password}"/>
</bean>
<!-- 使用配置文件 加载 数据库需要的4要素 经常使用 -->
<context:property-placeholder location="classpath:jdbc.properties" />
<!--配置sessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<!-- 读取hibernate配置文件<property name="configLocation" value="classpath:hibernate.cfg.xml"/> -->
<!-- 配置数据源 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 配置映射文件 Teacher.hbm.xml -->
<property name="mappingDirectoryLocations" value="cn/bdqn/bean"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</prop>
</props>
</property>
</bean>
<!--配置dao层 -->
<bean id="teacherDao" class="cn.bdqn.dao.impl.TeacherDaoImpl">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<!--配置service层 -->
<bean id="teacherService" class="cn.bdqn.service.impl.TeacherServiceImpl">
<property name="dao" ref="teacherDao"></property>
</bean>
<!-- 配置action层 -->
<!-- ==========================事务======================================= -->
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<tx:advice id="txAdvice" transaction-manager="transactionManager"> <!-- 设置事务的通知 -->
<tx:attributes>
<!-- 对连接点上的方法进行事务属性的配置 -->
<tx:method name="add*" isolation="DEFAULT" propagation="REQUIRED"/>
<tx:method name="delete*" isolation="DEFAULT" propagation="REQUIRED"/>
<tx:method name="update*" isolation="DEFAULT" propagation="REQUIRED"/>
<tx:method name="find*" read-only="true" isolation="DEFAULT" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<aop:config>
<!-- 指定切入点 -->
<aop:pointcut expression="execution(* *..service.*.*(..))" id="myPoint"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="myPoint"/>
</aop:config>
</beans>
创建对应的测试类
public class TeacherTest {
//新增
@Test
public void testAdd(){
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
TeacherService service= (TeacherService) context.getBean("teacherService");
service.addTeacher(new Teacher(1, 50, "xxxx", new Date()));
}
//删除
@Test
public void testDel(){
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
TeacherService service= (TeacherService) context.getBean("teacherService");
Teacher teacher=new Teacher();
teacher.settId(3);
service.deleteTeacher(teacher);
}
//修改
@Test
public void testUpdate(){
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
TeacherService service= (TeacherService) context.getBean("teacherService");
Teacher teacher=new Teacher();
teacher.settId(2);
teacher.setTage(50);
service.updateTeacher(teacher);
}
//查询所有
@Test
public void testFind(){
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
TeacherService service= (TeacherService) context.getBean("teacherService");
List<Teacher> teachers = service.findTeachers();
for (Teacher teacher : teachers) {
System.out.println(teacher);
}
}
}
与hibernate整合 不使用 hibernate模版 这种方式 推荐使用
底层代码
/**
*
*/
package cn.bdqn.dao.impl;
import java.util.List;
import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import cn.bdqn.bean.Teacher;
import cn.bdqn.dao.TeacherDao;
/**
* HibernateDaoSupport:是spring为hibernate提供的工具类
* getHibernateTemplate（）是获取模版！
* 什么时候给它赋值的？？？？
* spring容器 通过setHibernateTemplate!
*
*
*
* 我们发现 在底层 其实 还是默认调用了 getCurrentSession
* 所以我们 直接创建我们自己的SessionFactory
*
*/
public class TeacherDaoImpl implements TeacherDao {
private SessionFactory sessionFactory;
// 新增
public void addTeacher(Teacher teacher) {
sessionFactory.getCurrentSession().save(teacher);
}
// 删除
public void deleteTeacher(Teacher teacher){
sessionFactory.getCurrentSession().delete(teacher);
}
// 修改
public void updateTeacher(Teacher teacher){
sessionFactory.getCurrentSession().update(teacher);
}
// 查询
public List<Teacher> findTeachers(){
return sessionFactory.getCurrentSession().find("from Teacher");
}
public SessionFactory getSessionFactory() {
return sessionFactory;
}
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
}
/* getCurrentSession 和 OpenSession的区别 01.getCurrentSession创建的session会绑定到当前的线程！OpenSession不会 每次都是创建一个新的session 02.getCurrentSession创建的session 在事务回滚或者提交的时候，都会自动或关闭 OpenSession不会 在sessionFactory创建的时候。hibernate会根据配置创建响应的CurrenSessionContext 在getCurrentSession的时候，实际被执行的是CurrenSessionContext.currentSession() 如果CurrenSessionContext.currentSession()为空，则调用sessionFactory的OpenSession！ */
底层代码片段
在applicationContext.xml文件中增加currentSession的配置
<!--配置sessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<!-- 读取hibernate配置文件<property name="configLocation" value="classpath:hibernate.cfg.xml"/> -->
<!-- 配置数据源 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 配置映射文件 Teacher.hbm.xml -->
<property name="mappingDirectoryLocations" value="classpath:cn/bdqn/bean"/>
<property name="hibernateProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
<!-- 当前的事务线程内 使用session -->
<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate3.SpringSessionContext</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</prop>
</props>
</property>
</bean>
二.spring与struts的整合
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="AddServlet" method="post">
用户名：<input type="text" name="name" />
年龄：<input type="text" name="age" />
<button type="submit">注册</button>
</form>
</body>
</html>
public class AddServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8"); //解决乱码问题
String age = request.getParameter("age");
String name = request.getParameter("name");
Teacher teacher = new Teacher();
teacher.settAge(Integer.parseInt(age));
teacher.settName(name);
/*
* 创建Spring容器 这种方式 性能低下！ 每次访问servlet都会创建一个容器对象 放在当前新增servlet的init方法中 修改
* 删除 查询 等。。。。。 这样一来 有几个servlet就会有几个spring容器！
* ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
*
* 怎么能保证 在整个应用程序中 只有一个容器对象！ ServletContextListener 整个应用程序的监听器
*/
WebApplicationContext context = (WebApplicationContext) this
.getServletContext()
.getAttribute(
WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
System.out.println(context);
// 从容器获取service
TeacherService service = (TeacherService) context
.getBean("teacherService");
// 调用新增的方法
service.addTeacher(teacher);
// 转发到成功界面
request.getRequestDispatcher("success.jsp").forward(request, response);
}
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name></display-name>
<!-- 配置全局监听器 确保 容器 对象 只被实例化一次！ -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 默认xml名称 必须是 applicationContext.xml 必须在 WEB-INF的根目录下
现在我们 设置applicationContext.xml文件的路径 我们也可以更改 xml文件的名称 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<servlet>
<servlet-name>AddServlet</servlet-name>
<servlet-class>cn.bdqn.servlet.AddServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>AddServlet</servlet-name>
<url-pattern>/AddServlet</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
相应的底层代码
源代码
开始正式的与struts2进行整合
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="default" namespace="/" extends="struts-default">
<!-- 每次请求AddServlet 都会实例化一个 对象 需要让spring容器去管理 -->
<action name="AddServlet" class="teacherAction" method="add">
<result>/success.jsp</result>
</action>
</package>
</struts>
public class AddAction extends ActionSupport {
private String name;
private Integer age;
/*
* 默认采用了 byName 方式 注入 但是前提 TeacherService的属性名称必须和容器中的service名称一致
* 可以查看default.properties文件 查看
* 我们现在写的方式不是byName
*/
private TeacherService service;
public String add(){
System.out.println("进入add");
Teacher teacher=new Teacher();
teacher.settAge(age);
teacher.settName(name);
service.addTeacher(teacher);
return SUCCESS;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public TeacherService getService() {
return service;
}
public void setService(TeacherService service) {
this.service = service;
}
}
<!-- 配置action层 bean默认是单例！ action是多例 scope配置成多例 -->
<bean id="teacherAction" class="cn.bdqn.action.AddAction" scope="prototype">
<property name="service" ref="teacherService"></property>
</bean>
在 dao层以及service层创建对应的 根据ID获取Teacher的信息！
使用get方式 不会报错！
但是使用load方式获取数据的话，就会出现No Session!
因为在前台真正获取数据的时候，事务已经提交了，session也关闭了！
这时候 我们需要配置 OpenSessionInView模式！来保证用户获取数据的时候还有session！
只需要在web.xml文件中配置如下节点：
<!-- 设置openSessionInView 必须在struts2的核心控制器 之前 不然会起作用 -->
<filter>
<filter-name>open</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>open</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--配置struts2的核心控制器 -->
<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>
