Online Examination System (1) - System development environment to build

table of Contents

1. Project architecture

         1.1 Create a new project Exam

1.2 import the relevant profile and jar package

2. Build Kit

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1. Project architecture

1.1 Create a new project Exam

Project type Dynamic Web Project, which Dynamic Web Version 2.5;

 

1.2 import the relevant profile and jar package

There are configuration files (in the src directory):

hibernate.cfg.xml：

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <!--数据库连接设置 -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url"><![CDATA[jdbc:mysql://localhost:3306/db_exam?useUnicode=true&characterEncoding=utf8]]></property>
        <property name="connection.username">root</property>
        <property name="connection.password">123456</property>

       
        <!-- 方言 -->
        <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>

        <!-- 把session绑定到当前线程中 -->
        <property name="current_session_context_class">thread</property>

        <!-- 控制台显示SQL -->
        <property name="show_sql">true</property>

        <!-- 自动表更新 -->
        <property name="hbm2ddl.auto">update</property>
        
       
    </session-factory>

</hibernate-configuration>

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="studentInfo" namespace="/" extends="struts-default">
		
		
		
	</package>
	

     
</struts>

Web.xml struts which must also modify the configuration file; 

web.xml：

<?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_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>Exam</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>
  
  <filter>
        <filter-name>StrutsPrepareAndExecuteFilter</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
	   <filter-name>StrutsPrepareAndExecuteFilter</filter-name>
	   <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

Related jar package there (on the Web Content in the lib folder below):

These are the core of struts and hibernate jar package, as well as mysql driver package, and so on; 

 

2. Build Kit

 Establish Kit com.java.util ;

And the establishment of HibernateUtil tools:

package com.java.util;

import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

public class HibernateUtil {

	//获取SessionFactory的方法
	private static SessionFactory buildSessionFactory(){
		//实例化配置文件
		Configuration configuration=new Configuration().configure();
		//实例化服务注册
		ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
		//获取session工厂
		return configuration.buildSessionFactory(serviceRegistry);
	}
	
	//设置静态字段
	private static final SessionFactory sessionFactory=buildSessionFactory();
	
	//获取当前的单例SessionFactory，提供对外的接口
	public static SessionFactory getSessionFactory(){
		return sessionFactory;
	}
	
	//测试是否成功
	public static void main(String[] args) {
		HibernateUtil.getSessionFactory();
	}
}

Here we want to advance db_exam built a database in the database;

We can test run it:

This represents HibernateUtil run successfully, environment to build success.