SSH简单项目
这是我学习SSH整合时的一个测试项目，代码比较简单
整个项目实现从数据库中取数据，在页面上显示。项目的结构如下：
（1）数据库设计
数据库使用的是student数据库中的一个数据库表grade，表的内容如下：
（2）建立一个web项目—>导包。
（3）新建配置文件，新建每一层的类。代码如下：
配置文件：applicationContext.xml
<?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:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd 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-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"> <context:component-scan base-package="dao.impl,service.impl,controller"></context:component-scan> <!-- 连接数据库的配置 --> <bean id="dataSource" class="org.apache.tomcat.dbcp.dbcp.BasicDataSource"> <property name="url" value="jdbc:mysql://localhost:3306/student"></property> <property name="driverClassName" value="com.mysql.jdbc.Driver"></property> <property name="username" value="root"></property> <property name="password" value="123"></property> <property name="maxActive" value="100"></property> <property name="maxWait" value="10000"></property> </bean> <!-- 连接数据库的配置 --> <!-- 配置sessionFactory --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="mappingResources"> <list> <value>entity/Grade.hbm.xml</value> </list> </property> </bean> <!-- 配置sessionFactory --> <!-- 配置GradeDaoImpl的bean --> <!-- <bean id="gradeDao" class="dao.impl.GradeDaoImpl"> <property name="sessionFactory" ref="sessionFactory"></property> 配置dao.Impl的依赖，它依赖于sessionFactory,配置注解后就不需要配置这个了 </bean> <bean id="gradeService" class="service.impl.GradeServiceImpl"> <property name="gradeDao" ref="gradeDao"></property> </bean> 配置GradeDaoImpl的bean 定义事务管理器 <bean name="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" > <property name="sessionFactory" ref="sessionFactory"></property> </bean> 定义事务管理器 配置事务增强 <tx:advice id="txAdvice" transaction-manager="txManager"> 声明事务的规则——具体看我的另一篇博客SSH的整合 <tx:attributes> <tx:method name="find*" read-only="true" propagation="SUPPORTS"/> <tx:method name="query*" read-only="true" propagation="SUPPORTS"/> <tx:method name="get*" read-only="true" propagation="SUPPORTS"/> <tx:method name="add*" propagation="REQUIRED"/> <tx:method name="del*" propagation="REQUIRED"/> <tx:method name="update*" propagation="REQUIRED"/> <tx:method name="*" propagation="REQUIRED"/> </tx:attributes> </tx:advice> 配置事务增强 定义切面 <aop:config> 定义切入点 <aop:pointcut expression="execution(* service.impl.*.*(..))" id="pointCut"/> <!-- execution(* 包名.类名.方法名(..)) -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="pointCut"/> </aop:config> --> </beans>
entity层：Grade.java
package entity; public class Grade { private int gradeId; private String gradeName; public int getGradeId() { return gradeId; } public void setGradeId(int gradeId) { this.gradeId = gradeId; } public String getGradeName() { return gradeName; } public void setGradeName(String gradeName) { this.gradeName = gradeName; } }
entity层：Grade.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">
<!-- Generated 2017-12-18 15:42:30 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="entity.Grade" table="GRADE">
<id name="gradeId" type="int">
<column name="GRADEID" />
<generator class="assigned" />
</id>
<property name="gradeName" type="java.lang.String">
<column name="GRADENAME" />
</property>
</class>
</hibernate-mapping>
dao层：GradeDao.java
package dao; import java.util.List; import entity.Grade; public interface GradeDao { /** * 查询所有年级的方法 * @return */ List<Grade> query_Grade(); }
dao.Impl：GradeDaoImpl.java
package dao.impl; import java.util.List; import org.hibernate.SessionFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Repository; import dao.GradeDao; import entity.Grade; @Repository public class GradeDaoImpl implements GradeDao { @Autowired private SessionFactory sessionFactory; public List<Grade> query_Grade() { return sessionFactory.openSession().createQuery("from Grade").list(); } }
service：GradeService.java
package service; import java.util.List; import entity.Grade; public interface GradeService { /** * 查询所有年级 * @return */ List<Grade> All_Grade(); }
service.impl：GradeServiceImpl.java
package service.impl; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import service.GradeService; import dao.GradeDao; import entity.Grade; @Service public class GradeServiceImpl implements GradeService { @Autowired private GradeDao gradeDao; public List<Grade> All_Grade() { return gradeDao.query_Grade(); } }
test：GradeTest.java（这是一个中间的测试类，可以不要）
package test; import java.util.List; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import service.GradeService; import dao.GradeDao; import entity.Grade; public class GradeTest { public static void main(String[] args) { System.out.println(111); ApplicationContext act = new ClassPathXmlApplicationContext("applicationContext.xml"); GradeService gradeDao = (GradeService) act.getBean("gradeService"); List<Grade> list = gradeDao.All_Grade(); System.out.println(list.size()); } }
controller层：MyAction.java
package controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import com.opensymphony.xwork2.ActionSupport; import service.GradeService; import entity.Grade; @Controller public class MyAction extends ActionSupport { @Autowired //自动装配，配置这个注解后，就不用在application设置依赖，spring会自动帮你配置依赖关系，但需要在web.xml中配置，具体看web.xml private GradeService gradeService; private List<Grade> list; public GradeService getGradeService() { return gradeService; } public void setGradeService(GradeService gradeService) { this.gradeService = gradeService; } public String show(){ System.out.println(111); list=gradeService.All_Grade(); for (Grade grade : list) { System.out.println(grade.getGradeName()); } return "success"; } public List<Grade> getList() { return list; } public void setList(List<Grade> list) { this.list = list; } }
界面显示：NewFile.jsp
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <!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>Insert title here</title> <script type="text/javascript"></script> </head> <body> <c:forEach items="${list}" var="l"> <p>${l.gradeId}  ${l.gradeName}</p> </c:forEach> </body> </html>
struts配置文件：struts.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <package name="default" namespace="/" extends="struts-default"> <action name="show" class="controller.MyAction" method="show"> <result name="success">/NewFile.jsp</result> </action> </package> </struts>
web.xml配置文件
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name>SSH_Framework</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <listener> <!-- 配置监听器 --> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <!-- 配置一组键值对，与<listener>对应，当服务器启动时，服务器会读取web.xml配置，当读到<listener></listener>和<context-param></context-param>这两个节点的时候，容器会将这两个节点set到ServletContext(上下文对象)中，这样我们在程序中就能通过这个上下文对象去取得我们这个配置值。 --> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <filter> <!-- 配置一个过滤器 --> <filter-name>struts</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> <!-- struts给出的一个过滤器，或自动把匹配到的地址信息交由struts的配置文件处理 --> </filter> <filter-mapping> <!-- 配置过滤映射，当页面的访问地址为.action结尾时，调用交由filter-name为struts的过滤器处理 --> <filter-name>struts</filter-name> <url-pattern>*.action</url-pattern> </filter-mapping> </web-app>
