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JavaWeb项目系列（一）：员工管理系统（SSH框架）

2017-07-25 15:33 218 查看

JavaWeb项目系列（一）：员工管理系统（SSH框架）

这是一个员工管理系统，应用的是SSH框架Spring+SpringMVC+Hibernate的项目，重构了之前用纯servlet版本和struts+jsp版本（项目源码在我的github），本次项目特意写一篇博客说明带大家了解项目的需求和设计

文章结构：
1.
项目介绍（功能业务逻辑，运用的知识，项目数据库）；
2.
项目架构介绍以及部分关键逻辑代码说明；
3.
源码分享。

一、项目介绍（功能业务逻辑，运用的知识，项目数据库）

（1）功能介绍：
- 增删改查员工。
- 增删改查页面显示当前用户信息（session里获取）
- 点击button，倒序，正序显示员工列表
- 在list页面模糊查询（按姓名查询）
- 分页功能
- 部分前端代码

（2）运用的知识：
spring，springmvc，hibernate，mysql

- 基本数据库知识MySQL
- Spring+SpringMVC+Hibernate
- （重点）框架的MVC设计模式的应用
- （重点）分页查询
- 部分前端代码（css的应用）

(3)项目构建
项目分包：MVC架构

controller:控制层，写SpringMvc的action
dao：数据层，Hibernate对数据的操作
entity：实体类和相应的*.hbm.xml(hibernate的类配置文件)
servicesDao：业务Dao，对单笔Dao进行业务封装
utils：工具类

（4）数据库
在Mysql中建一个MyTest数据库，表由Hibernate自动生成，但需要在User表中添加一个用户

（5）项目功能截图

登录界面：

系统主页面：

一、项目架构介绍及配置文件

1、后台包结构：

2、前端包结构：

3、用到的jar包（34个，源码在我的github中）：

4、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_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>员工管理系统</display-name>
<welcome-file-list>

    <welcome-file>login.jsp</welcome-file>
</welcome-file-list>

<filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>utf-8</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
          classpath:applicationContext.xml
          </param-value>
</context-param>
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
    <servlet-name>spring</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>*.action</url-pattern>
</servlet-mapping>

</web-app>

5、applicationContext.xml (Spring主配置文件，内含Hibernate配置)

<?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:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:component-scan base-package="dao,servicesDao"></context:component-scan>




<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">

<property name="driverClass" value="org.gjt.mm.mysql.Driver" />

<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/myTest" />

<property name="user" value="root" />

<property name="password" value="" />

<property name="maxPoolSize" value="4" />

<property name="minPoolSize" value="1" />

<property name="initialPoolSize" value="1" />

<property name="maxIdleTime" value="28000" />
</bean>




<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="hibernateProperties">
<props>

<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>entity/User.hbm.xml</value>
<value>entity/Employee.hbm.xml</value>
</list>
</property>
</bean>

<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>

<tx:advice id="transactionAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="add*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="append*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="insert*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="save*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="update*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="modify*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="edit*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="delete*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="remove*" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="repair" propagation="REQUIRED" rollback-for="Exception" />
<tx:method name="delAndRepair" propagation="REQUIRED" rollback-for="Exception" />

<tx:method name="get*" propagation="SUPPORTS" rollback-for="Exception" />
<tx:method name="select*" propagation="SUPPORTS" rollback-for="Exception" />
<tx:method name="find*" propagation="SUPPORTS" rollback-for="Exception" />
<tx:method name="load*" propagation="SUPPORTS" rollback-for="Exception" />
<tx:method name="search*" propagation="SUPPORTS" rollback-for="Exception" />
<tx:method name="datagrid*" propagation="SUPPORTS" rollback-for="Exception" />
<tx:method name="count" propagation="SUPPORTS" rollback-for="Exception" />
<tx:method name="login*" propagation="SUPPORTS" rollback-for="Exception" />
<tx:method name="*" propagation="SUPPORTS" rollback-for="Exception" />
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="transactionPointcut" expression="execution(* servicesDao..*(..))" />
<aop:advisor pointcut-ref="transactionPointcut"
advice-ref="transactionAdvice" />
</aop:config>
</beans>

6、spring-servlet.xml (SpringMVC配置文件)

<?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:mvc="http://www.springframework.org/schema/mvc"
     xmlns:context="http://www.springframework.org/schema/context"
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">      <context:component-scan base-package="controller"/>
     <mvc:annotation-driven/>
     <bean
          class="org.springframework.web.servlet.view.InternalResourceViewResolver">
          <property name="prefix" value="/" />
          <property name="suffix" value=".jsp" />
     </bean>
     <mvc:default-servlet-handler />
</bean
fef2
s>

二、项目设计思路及关键代码
1、dao层：
定义了一个接口，一个接口实现方法当做模板，其余的dao需继承模板dao

daoTemplate.java

package dao;

import java.util.List;

public interface daoTemplate<T> {
public int save(T t)throws Exception;
public int delete(T t)throws Exception;
public int delete(Integer id)throws Exception;
public int update(T t)throws Exception;
public List<T> select()throws Exception;
public T get(Integer id)throws Exception;
}

daoTemplateImpl.java

package dao;

import java.lang.reflect.ParameterizedType;
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

//HibernateDaoSupport继承HibernateTemplate(该类中存在一个方法 setSessionFactory(SessionFactory))
//HibernateDaoSupport需要外部注入hibernate的Sessionfactory
//每个pojo类对应的单笔业务Dao都要注入sessionfactory
public class daoTemplateImpl<T> extends HibernateDaoSupport implements daoTemplate<T>{
protected Class claz;

public daoTemplateImpl(){
//实例化claz
ParameterizedType pt =(ParameterizedType) this.getClass().getGenericSuperclass();
this.claz = (Class<T>) pt.getActualTypeArguments()[0];

}

@Autowired
public void setSessionFactory1(SessionFactory sessionFactory) {
// TODO Auto-generated method stub
super.setSessionFactory(sessionFactory);
}

@Override
public int save(T t) throws Exception {

getSession().save(t);
return 1;
}

@Override
public int delete(T t) throws Exception {
getSession().delete(t);
return 1;
}

@Override
public int delete(Integer id) throws Exception {
T temp=(T)getSession().load(claz, id);
return delete(temp);
}

@Override
public int update(T t) throws Exception {
getSession().update(t);
return 1;
}

@Override
public List<T> select() throws Exception {
String hql="from "+claz.getName();
Query query=getSession().createQuery(hql);
return query.list();
}

@Override
public T get(Integer id) throws Exception {
return (T)getSession().get(claz, id);
}

}

登录的代码：

@Repository
public class employeeDao extends daoTemplateImpl<Employee>{
   /**
    * 模糊查询
    * @param condition eg："张三"
    * @return List<Employee>
    */
public List<Employee> getBasic(String condition) {
   String hql="from "+claz.getName()+" where empname like :name ";
   Query query=getSession().createQuery(hql);
   query.setString("name", "%"+condition+"%");
   return query.list();
}
}

模糊查询的代码：

public List<Employee> getBasic(String condition) {
   //注意这里的empname是pojo类（实体类）的属性名
   String hql="from "+claz.getName()+" where empname like :name ";
   Query query=getSession().createQuery(hql);
   query.setString("name", "%"+condition+"%");
   return query.list();
}

注意：每个dao需要加上
[align=left]@Repository注解[/align]

2、servicesDao：
注意：（1）要加上@Service注解
（2）将employeeDao做为属性，加上 @Autowired，并且并且get、set方法
eg：
@Autowired

employeeDao empDao;

package servicesDao;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import dao.employeeDao;
import entity.Employee;

@Service
public class employeeServiceDao {
@Autowired
employeeDao empDao;

public Employee save(Employee e)throws Exception{
empDao.save(e);
return e;
}

public boolean delete(Employee e)throws Exception{
return empDao.delete(e)>0;

}

public boolean update(Employee e)throws Exception{
return empDao.update(e)>0;

}

public List<Employee> query()throws Exception{
return empDao.select();

}
public List<Employee> getBasic(String condition)throws Exception{
return empDao.getBasic(condition);
}

public Employee get(Integer id)throws Exception{
return empDao.get(id);
}

public employeeDao getEmpDao() {
return empDao;
}

public void setEmpDao(employeeDao empDao) {
this.empDao = empDao;
}

}

其实servicesDao也应该写一个模板dao，这里省略了

3、controller层
userController.java：

package controller;

import java.awt.image.BufferedImage;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Map;

import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import entity.User;
import servicesDao.userServiceDao;
import utils.ImageUtil;

@Controller
public class userController {
@Autowired
userServiceDao useDao;
@RequestMapping("/user_login")
public String login(User u,String number,HttpSession session) throws Exception{
String imageCode=(String)session.getAttribute("imageCode");
if(imageCode.equals(number.toUpperCase())){
User user=useDao.login(u);
if(user!=null){
session.setAttribute("user", user);
return "redirect:/emp_list.action";
}

}
return "login";
}
@RequestMapping("/createValidCode")
public OutputStream createImg(HttpServletResponse response,HttpSession session)throws Exception{

// 1.调用工具类，生成验证码及图片
Map<String, BufferedImage> imageMap = ImageUtil.createImage();
// 2.从imageMap中取到验证码，并放入session
String imageCode = imageMap.keySet().iterator().next();
session.setAttribute("imageCode", imageCode.toUpperCase());
// 3.从imageMap中取到图片，转为输入流
BufferedImage image = imageMap.get(imageCode);
OutputStream output=response.getOutputStream();
ImageUtil.WriteOutputStream(image,output);
return output;
}

public userServiceDao getUseDao() {
return useDao;
}

public void setUseDao(userServiceDao useDao) {
this.useDao = useDao;
}

}

employeeController.java:

package controller;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import dao.employeeDao;
import entity.Employee;
import servicesDao.employeeServiceDao;
import utils.StringUtil;

@Controller
public class employeeController {
@Autowired
employeeServiceDao employDao;

@RequestMapping("/toAddPage")
public String toAddPage(Employee emp) throws Exception{

return "redirect:/emp_add.action";

}
@RequestMapping("/emp_add")
public String emp_add(Employee emp) throws Exception{
employDao.save(emp);
return "redirect:/emp_list.action";

}

@RequestMapping("/emp_list")
public String dispEmployee(Map models,String sqlname) throws Exception{
if(StringUtil.isNotEmpty(sqlname)){
models.put("employees", employDao.getBasic(sqlname));}
else{
models.put("employees", employDao.query());}
return "empList";
}

@RequestMapping("/emp_del")
public String deleteEmp(Integer id)throws Exception{
if(id!=null){
Employee e=new Employee();
e.setT_id(id);
employDao.delete(e);
}
return "redirect:/emp_list.action";
}

@RequestMapping("/emp_update")
public String updateEmpBofer(Integer id,Map models)throws Exception{
Employee e=employDao.get(id);
models.put("employee",e);
return "updateEmp";
}

@RequestMapping("/emp_updateEmp")
public String updateEmp(Employee emp)throws Exception{
employDao.update(emp);
return "redirect:/emp_list.action";
}
public employeeServiceDao getEmployDao() {
return employDao;
}

public void setEmployDao(employeeServiceDao employDao) {
this.employDao = employDao;
}

}

注意：（1）加@Controller注解
   （2）加
@Autowired
employeeServiceDao employDao;//get、set方法
   （3）@RequestMapping("/toAddPage") 对应访问的地址为/toAddPage.action
   （4）Map models，可将里面的值传到页面中去显示
   （5）public String emp_add(Employee emp) throws Exception 可接收页面中 name为emp的对象
   （6）请求转发：redirect:/emp_list.action

4、工具类

三、前端代码
empList.jsp

<%@ page language="java" import="java.util.*,entity.Employee"
     pageEncoding="utf-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>emplist</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="css/style.css" />
</head>
<body>
     <div id="wrap">
          <div id="top_content">
              <div id="header">
                   <div id="rightheader">
                        <p>
                             当前的用户：
                             ${sessionScope.user.username}<br />
                        </p>
                        <p>
                             <%-- 当前的用户：
                             <%=session.getAttribute("username") %>
                             
                             ${sessionScope.user.username}<br /> --%>
                             <%@include file="head.jsp"%>
                             <br />
                        </p>
                   </div>
                   <div id="topheader">
                        <h1 id="title">
                             
                             <form action="emp_list.action" method="post">
                                  <input type="text" class="inputgri" name="sqlname"
                                      placeholder="请输入你要查询的姓名" /> <input type="submit" class="button"
                                      value="查询" />
                             </form>
                             <table>
                                  <tr>
                                      <td><form action="emp_listAsc.action" method="post">
                                                <input type="submit" class="button" value="薪水升序排序">
                                           </form></td>
                                      <td><form action="emp_list.action" method="post">
                                                <input type="submit" class="button" value="薪水降序排序">
                                           </form></td>
                                  </tr>

                             </table>
                        </h1>
                   </div>
                   <div id="navigation"></div>
              </div>
              <div id="content">
                   <p id="whereami"></p>
                   <h1>Welcome!</h1>
                   <table class="table">
                        <tr class="table_header">
                             <td>ID</td>
                             <td>Name</td>
                             <td>Salary</td>
                             <td>Age</td>
                             <td>Operation</td>
                        </tr>

                        <%
                             List<Employee> employees = (List<Employee>) request
                                       .getAttribute("employees");
                             for (Employee e : employees) {
                        %>

                        <tr class="row1">
                             <td><%=e.getT_id()%></td>
                             <td><%=e.getEmpname()%></td>
                             <td><%=e.getEmpsalary()%></td>
                             <td><%=e.getEmpage()%></td>
                             <td><a href="emp_del.action?id=<%=e.getT_id()%>"
                                  onclick="return confirm('是否要删除<%=e.getEmpname()%>');">删除</a> <a
                                  href="emp_update.action?id=<%=e.getT_id()%>">修改</a></td>
                        </tr>

                        <%
                             }
                        %>
                   </table>
                   <p>
                        <input type="button" class="button" value="添加员工"
                             onclick="location='addEmp.jsp'" />
                   </p>
              </div>
          </div>
          <div id="footer">
              <div id="footer_bg">ABC@126.com</div>
          </div>
     </div>
</body>
</html>

四、github传送门
https://github.com/tangfuping/SSH_emp.git

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