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}&nbsp&nbsp${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>