11、完成雇员管理系统
完成上面的雇员管理系统的相关功能：
<a href="#">添加雇员</a>
<a href="#">删除雇员</a>
<a href="#">修改雇员</a>
<a href="#">退出系统</a>
首先完成添加雇员功能：
登陆成功后，显示mainframe.jsp：
<body>
<h2>欢迎 ${loginer.name} 所在部门： ${loginer.department.name}请选择你要的操作</h2>
<a href="${pageContext.request.contextPath}/employee.do?flag=addEmpUi">添加雇员</a>
<a href="#">删除雇员</a>
<a href="#">修改雇员</a>
<a href="#">退出系统</a>
</body>
点击添加雇员，调用EmployeeAction的addEmpUi方法，显示雇员添加页面
编写EmployeeAction：package com.cdtax.web.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import com.cdtax.domain.Employee;
import com.cdtax.web.forms.EmployeeForm;
public class EmployeeAction extends DispatchAction
{
public ActionForward addEmpUi(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//打通流程
return mapping.findForward("goAddEmp");
}
//处理添加雇员的请求
public ActionForward addEmp(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//看看这里是否能够得到用户提交的各种数据
EmployeeForm employeeForm = (EmployeeForm)form;
// System.out.println(employeeForm.getDepartmentId() + " |" +
// employeeForm.getEmail() + " |" + employeeForm.getGrade()
// + " |" + employeeForm.getName() + " |" + employeeForm.getPwd()
// + " |" + employeeForm.getSalary());
return null;
}
}
相应的雇员添加页面和对应的form
<%@ 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 'addemp.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>
添加雇员页面 <br>
<form action="${pageContext.request.contextPath}/employee.do?flag=addEmp" method="post">
<table>
<tr><td>name</td><td><input type="text" name="name" /></td></tr>
<tr><td>email</td><td><input type="text" name="email" /></td></tr>
<tr><td>grade</td><td><input type="text" name="grade" /></td></tr>
<tr><td>pwd</td><td><input type="text" name="pwd" /></td></tr>
<tr><td>salary</td><td><input type="text" name="salary" /></td></tr>
<tr><td>department</td>
<td>
<select name="departmentId">
<option value="1">财务部</option>
<option value="2">人事部</option>
</select>
</td>
</tr>
<tr><td><input type="submit" value="添加" /></td>
<td><input type="reset" value="重置" /></td></tr>
</table>
</form>
</body>
</html>
package com.cdtax.web.forms;
import org.apache.struts.action.ActionForm;
public class EmployeeForm extends ActionForm
{
private String id;
private String pwd;
private String email;
private String grade;
private String name;
private String salary;
private String departmentId;
public String getEmail()
{
return email;
}
public void setEmail(String email)
{
this.email = email;
}
public String getGrade()
{
return grade;
}
public void setGrade(String grade)
{
this.grade = grade;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public String getSalary()
{
return salary;
}
public void setSalary(String salary)
{
this.salary = salary;
}
public String getDepartmentId()
{
return departmentId;
}
public void setDepartmentId(String departmentId)
{
this.departmentId = departmentId;
}
public String getId()
{
return id;
}
public void setId(String id)
{
System.out.println("form id" + id);
this.id = id;
}
public String getPwd()
{
return pwd;
}
public void setPwd(String pwd)
{
this.pwd = pwd;
}
}
配置struts-config.xml
<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"> <struts-config> <form-beans> <form-bean name="employeeForm" type="com.cdtax.web.forms.EmployeeForm" /> </form-beans> <action-mappings> <action path="/login" parameter="flag" name="employeeForm"> <forward name="ok" path="/WEB-INF/mainFrame.jsp" /> <forward name="err" path="/WEB-INF/login.jsp" /> </action> <!-- 配置employeeAction --> <action path="/employee" name="employeeForm" parameter="flag"> <forward name="goAddEmp" path="/WEB-INF/addemp.jsp" /> </action> </action-mappings> <!-- 配置代理请求处理 DelegatingRequestProcessor它的用处是 --> <controller> <set-property property="processorClass" value="org.springframework.web.struts.DelegatingRequestProcessor" /> </controller> </struts-config>因为spring接管了struts的action，所以spring配置文件中增加
<bean name="/employee" class="com.cdtax.web.action.EmployeeAction" /> 一句
这里只是将流程走通，没有进行数据库添加操作，EmployeeAction的addEmp方法只是打印出前台提交的数据。
修改EmployeeAction的addEmp方法，进行数据库存取操作
从雇员添加页面获取的信息被封装到EmployeeForm中，然后生成一个雇员对象Employee，根据form设置相关值，然后保存，这里涉及到部门信息的取得，因为Employee对象中有一个Department，所以修改DepartmentServiceInter，增加一个根据id获取部门对象的方法：
package com.cdtax.service.interfaces;
import com.cdtax.domain.Department;
public interface DepartmentServiceInter
{
//保存部门的方法
public void addDepartment(Department d);
//根据id获取部门
public Department getDepartmentById(java.io.Serializable id);
}
package com.cdtax.service.impl;
import java.io.Serializable;
import javax.annotation.Resource;
import org.hibernate.SessionFactory;
import org.springframework.transaction.annotation.Transactional;
import com.cdtax.domain.Department;
import com.cdtax.service.interfaces.DepartmentServiceInter;
@Transactional
public class DepartmentService implements DepartmentServiceInter
{
@Resource
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory)
{
this.sessionFactory = sessionFactory;
}
public SessionFactory getSessionFactory()
{
return sessionFactory;
}
public void addDepartment(Department d)
{
sessionFactory.getCurrentSession().save(d);
}
public Department getDepartmentById(Serializable id)
{
return (Department)sessionFactory.getCurrentSession().get(Department.class,id);
}
}
EmployeeAction：
package com.cdtax.web.action;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import com.cdtax.domain.Employee;
import com.cdtax.service.interfaces.DepartmentServiceInter;
import com.cdtax.service.interfaces.EmployeeServiceInter;
import com.cdtax.web.forms.EmployeeForm;
public class EmployeeAction extends DispatchAction
{
@Resource
private DepartmentServiceInter departmentService;
@Resource
private EmployeeServiceInter employeeService;
public void setDepartmentService(DepartmentServiceInter departmentService)
{
this.departmentService = departmentService;
}
public void setEmployeeService(EmployeeServiceInter employeeService)
{
this.employeeService = employeeService;
}
public ActionForward addEmpUi(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//打通流程
return mapping.findForward("goAddEmp");
}
//处理添加雇员的请求
public ActionForward addEmp(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//看看这里是否能够得到用户提交的各种数据
EmployeeForm employeeForm = (EmployeeForm)form;
// System.out.println(employeeForm.getDepartmentId() + " |" +
// employeeForm.getEmail() + " |" + employeeForm.getGrade()
// + " |" + employeeForm.getName() + " |" + employeeForm.getPwd()
// + " |" + employeeForm.getSalary());
//创建一个Employee对象，DAO
Employee employee = new Employee();
employee.setEmail(employeeForm.getEmail());
employee.setGrade(Integer.parseInt(employeeForm.getGrade()));
employee.setHiredate(new java.util.Date());
employee.setName(employeeForm.getName());
employee.setPwd(employeeForm.getPwd());
employee.setSalary(Float.parseFloat(employeeForm.getSalary()));
//该雇员是哪个部门的
employee.setDepartment(departmentService.getDepartmentById(Integer.parseInt(employeeForm.getDepartmentId())));
//保存雇员
try
{
employeeService.addEmployee(employee);
}
catch (Exception e)
{
return mapping.findForward("opererr");
}
return mapping.findForward("operok");
}
}
struts-config.xml
<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"> <struts-config> <form-beans> <form-bean name="employeeForm" type="com.cdtax.web.forms.EmployeeForm" /> </form-beans> <action-mappings> <action path="/login" parameter="flag" name="employeeForm"> <forward name="ok" path="/WEB-INF/mainFrame.jsp" /> <forward name="err" path="/WEB-INF/login.jsp" /> </action> <!-- 配置employeeAction --> <action path="/employee" name="employeeForm" parameter="flag"> <forward name="goAddEmp" path="/WEB-INF/addemp.jsp" /> </action> </action-mappings> <!-- 配置全局跳转 --> <global-forwards> <forward name="opererr" path="/WEB-INF/opererr.jsp"></forward> <forward name="operok" path="/WEB-INF/operok.jsp"></forward> </global-forwards> <!-- 配置代理请求处理 DelegatingRequestProcessor它的用处是 --> <controller> <set-property property="processorClass" value="org.springframework.web.struts.DelegatingRequestProcessor" /> </controller> </struts-config>
目前这个项目的代码复用性不好，我们需要重新整理.
通过在web层和业务层间增加了一套基础接口来提高代码的复用性.如Employee和Department的service都有一个添加和根据id查找的方法，怎样整合呢
搞一个BasicServiceInter接口：基础接口，EmployeeServiceInter和DepartmentServiceInter都继承自基础接口BasicServiceInter，普通的业务实现类实现相应接口
创建基础接口的抽象类BasicService，实现BasicServiceInter接口，同时普通业务处理类继承次抽象类。
创建基础接口：
package com.cdtax.basic;
import java.util.List;
public interface BasicServiceInter
{
//声明一些常用的方法
//1.通过id获取对象
public Object findById(Class clazz,java.io.Serializable id);
//2.查询方法 hql-->hibernate
public List executeQuery(String hql,Object[] parameters);
//3.查询方法 带分页
public List executeQueryByPage(String hql,Object[] parameters,int pageNow,int pageSize);
//4.添加一个对象
public void add(Object obj);
//5.统一的执行hql->删除、修改 hql="update domain对象 where ？"
public List executeUpdate(String hql,Object[] parameters);
}
定义一个实现基础接口的抽象类：
package com.cdtax.basic;
import java.io.Serializable;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.Query;
import org.hibernate.SessionFactory;
import org.springframework.transaction.annotation.Transactional;
@Transactional
public abstract class BasicService implements BasicServiceInter
{
@Resource
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory)
{
this.sessionFactory = sessionFactory;
}
public Object findById(Class clazz, Serializable id)
{
return this.sessionFactory.getCurrentSession().get(clazz, id);
}
//统一的查询方法（hql）
public List executeQuery(String hql, Object[] parameters)
{
Query query = this.sessionFactory.getCurrentSession().createQuery(hql);
//注入？值
if(parameters != null && parameters.length > 0)
{
for(int i = 0; i < parameters.length; i++)
{
query.setParameter(i, parameters[i]);
}
}
return query.list();
}
//分页
public List executeQueryByPage(String hql, Object[] parameters,
int pageNow, int pageSize)
{
Query query = this.sessionFactory.getCurrentSession().createQuery(hql);
if(parameters != null && parameters.length > 0)
{
for(int i = 0; i < parameters.length; i++)
{
query.setParameter(i, parameters[i]);
}
}
return query.setFirstResult((pageNow-1)*pageSize).setMaxResults(pageSize).list();
}
public void add(Object obj)
{
this.sessionFactory.getCurrentSession().save(obj);
}
public List executeUpdate(String hql, Object[] parameters)
{
// TODO Auto-generated method stub
return null;
}
}
修改业务service接口，使其继承BasicServiceInter接口：
package com.cdtax.service.interfaces;
import com.cdtax.basic.BasicServiceInter;
import com.cdtax.domain.Department;
public interface DepartmentServiceInter extends BasicServiceInter
{
//1.如果有比较特殊的方法，可以在这里定义
}
package com.cdtax.service.interfaces;
import java.util.List;
import com.cdtax.basic.BasicServiceInter;
import com.cdtax.domain.Employee;
public interface EmployeeServiceInter extends BasicServiceInter
{
//如果该雇员存在，则返回该雇员的完整信息，否则返回null
public Employee checkEmployee(Employee e);
}
可以看出，业务接口极大简化了。
修改业务实现类，其继承抽象类BasicService并实现相应的业务接口
package com.cdtax.service.impl;
import java.io.Serializable;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.springframework.transaction.annotation.Transactional;
import com.cdtax.basic.BasicService;
import com.cdtax.domain.Department;
import com.cdtax.domain.Employee;
import com.cdtax.service.interfaces.EmployeeServiceInter;
//这里配置@Tansactional用处是让spring的事务管理器接管该service的事务
//如果只想让事务管理器管理某个方法中的事务，那么就将注解加到方法上
public class EmployeeService extends BasicService implements EmployeeServiceInter
{
//验证用户
public Employee checkEmployee(Employee e)
{
String hql="from Employee where id=? and pwd=?";
Object[] parameters = {e.getId(),e.getPwd()};
List list = this.executeQuery(hql, parameters);
if(list.size() == 0)
{
return null;
}
else
{
return (Employee)list.get(0);
}
}
}
package com.cdtax.service.impl;
import java.io.Serializable;
import javax.annotation.Resource;
import org.hibernate.SessionFactory;
import org.springframework.transaction.annotation.Transactional;
import com.cdtax.basic.BasicService;
import com.cdtax.domain.Department;
import com.cdtax.service.interfaces.DepartmentServiceInter;
@Transactional
public class DepartmentService extends BasicService implements DepartmentServiceInter
{
}
修改Action
package com.cdtax.web.action;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import com.cdtax.domain.Department;
import com.cdtax.domain.Employee;
import com.cdtax.service.interfaces.DepartmentServiceInter;
import com.cdtax.service.interfaces.EmployeeServiceInter;
import com.cdtax.web.forms.EmployeeForm;
public class EmployeeAction extends DispatchAction
{
@Resource
private DepartmentServiceInter departmentService;
@Resource
private EmployeeServiceInter employeeService;
public void setDepartmentService(DepartmentServiceInter departmentService)
{
this.departmentService = departmentService;
}
public void setEmployeeService(EmployeeServiceInter employeeService)
{
this.employeeService = employeeService;
}
public ActionForward addEmpUi(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//打通流程
return mapping.findForward("goAddEmp");
}
//处理添加雇员的请求
public ActionForward addEmp(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//看看这里是否能够得到用户提交的各种数据
EmployeeForm employeeForm = (EmployeeForm)form;
// System.out.println(employeeForm.getDepartmentId() + " |" +
// employeeForm.getEmail() + " |" + employeeForm.getGrade()
// + " |" + employeeForm.getName() + " |" + employeeForm.getPwd()
// + " |" + employeeForm.getSalary());
//创建一个Employee对象，DAO
Employee employee = new Employee();
employee.setEmail(employeeForm.getEmail());
employee.setGrade(Integer.parseInt(employeeForm.getGrade()));
employee.setHiredate(new java.util.Date());
employee.setName(employeeForm.getName());
employee.setPwd(employeeForm.getPwd());
employee.setSalary(Float.parseFloat(employeeForm.getSalary()));
//该雇员是哪个部门的
employee.setDepartment((Department)departmentService.findById(Department.class, Integer.parseInt(employeeForm.getDepartmentId())));
//保存雇员
try
{
employeeService.add(employee);
}
catch (Exception e)
{
return mapping.findForward("opererr");
}
return mapping.findForward("operok");
}
}
部署执行，上面修改的只是针对登陆验证，成功
下一步做雇员信息的显示，从mainframe.jsp发出请求。
<body>
<h2>欢迎 ${loginer.name} 所在部门： ${loginer.department.name}请选择你要的操作</h2>
<a href="${pageContext.request.contextPath}/employee.do?flag=addEmpUi">添加雇员</a>
<a href="${pageContext.request.contextPath}/employee.do?flag=goListEmp">显示雇员</a>
<a href="#">修改雇员</a>
<a href="#">退出系统</a>
</body>修改EmployeeAction：
增加如下方法
public ActionForward goListEmp(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//打通流程
return mapping.findForward("goListEmp");
}
修改struts-config.xml
<!-- 配置employeeAction --> <action path="/employee" name="employeeForm" parameter="flag"> <forward name="goAddEmp" path="/WEB-INF/addemp.jsp" /> <forward name="goListEmp" path="/WEB-INF/listEmp.jsp"></forward> </action>
编写lsitEmp.jsp页面：
<%@ 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 'listEmp.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>
<h1>雇员信息</h1>
</body>
</html>
这是打通流程。
然后修改EmployeeServiceInter和EmployeeService，增加一个查询所有雇员的方法：
package com.cdtax.service.interfaces;
import java.util.List;
import com.cdtax.basic.BasicServiceInter;
import com.cdtax.domain.Employee;
public interface EmployeeServiceInter extends BasicServiceInter
{
//显示所有雇员
public List showEmployeeList();
//如果该雇员存在，则返回该雇员的完整信息，否则返回null
public Employee checkEmployee(Employee e);
}
package com.cdtax.service.impl;
import java.io.Serializable;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.springframework.transaction.annotation.Transactional;
import com.cdtax.basic.BasicService;
import com.cdtax.domain.Department;
import com.cdtax.domain.Employee;
import com.cdtax.service.interfaces.EmployeeServiceInter;
//这里配置@Tansactional用处是让spring的事务管理器接管该service的事务
//如果只想让事务管理器管理某个方法中的事务，那么就将注解加到方法上
public class EmployeeService extends BasicService implements EmployeeServiceInter
{
//显示所有雇员
public List showEmployeeList()
{
String hql = "from Employee";
return this.executeQuery(hql, null);
}
//验证用户
public Employee checkEmployee(Employee e)
{
String hql="from Employee where id=? and pwd=?";
Object[] parameters = {e.getId(),e.getPwd()};
List list = this.executeQuery(hql, parameters);
if(list.size() == 0)
{
return null;
}
else
{
return (Employee)list.get(0);
}
}
}
修改EmployeeAction的goListEmp方法：
public ActionForward goListEmp(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//将查询的结果保存到request中返回到前台页面
request.setAttribute("emplist", employeeService.showEmployeeList());
//打通流程
return mapping.findForward("goListEmp");
}
其实，在这里request.setAttribute("emplist", employeeService.showEmployeeList());这一句可以使用查询语句，如这样：
request.setAttribute("emplist", employeeService.executeQuery("from Employee", null));就不需要修改上面的EmployeeServiceInter和EmployeeService，之所以这样做，是为了分层的明晰性，Action中不处理业务逻辑。
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
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 'listEmp.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>
<h1>雇员信息</h1>
<table>
<tr><td>id</td><td>name</td><td>email</td><td>grade</td><td>salary</td><td>修改</td><td>删除</td></tr>
<c:forEach items="${emplist }" var="emp">
<tr><td>${emp.id }</td><td>${emp.name }</td>
<td>${emp.email }</td><td>${emp.grade }</td>
<td>${emp.salary }</td><td><a href="">修改用户</a></td>
<td><a href="">删除用户</a></td></tr>
</c:forEach>
</table>
</body>
</html>
下面考虑分页：
在基础接口中增加方法：
package com.cdtax.basic;
import java.util.List;
public interface BasicServiceInter
{
//声明一些常用的方法
//1.通过id获取对象
public Object findById(Class clazz,java.io.Serializable id);
//2.查询方法 hql-->hibernate
public List executeQuery(String hql,Object[] parameters);
//3.查询方法 带分页
public List executeQueryByPage(String hql,Object[] parameters,int pageNow,int pageSize);
//4.添加一个对象
public void add(Object obj);
//5.统一的执行hql->删除、修改 hql="update domain对象 where ？"
public List executeUpdate(String hql,Object[] parameters);
//6、返回一个对象的操作
public Object uniqueQuery(String hql,Object[] parameters);
//7、得到hql，返回pageCount
public int queryPageCount(String hql,Object[] parameters,int pageSize);
}
修改基础抽象类
package com.cdtax.basic;
import java.io.Serializable;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.Query;
import org.hibernate.SessionFactory;
import org.springframework.transaction.annotation.Transactional;
@Transactional
public abstract class BasicService implements BasicServiceInter
{
@Resource
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory)
{
this.sessionFactory = sessionFactory;
}
public Object findById(Class clazz, Serializable id)
{
return this.sessionFactory.getCurrentSession().get(clazz, id);
}
//统一的查询方法（hql）
public List executeQuery(String hql, Object[] parameters)
{
Query query = this.sessionFactory.getCurrentSession().createQuery(hql);
//注入？值
if(parameters != null && parameters.length > 0)
{
for(int i = 0; i < parameters.length; i++)
{
query.setParameter(i, parameters[i]);
}
}
return query.list();
}
//分页
public List executeQueryByPage(String hql, Object[] parameters,
int pageNow, int pageSize)
{
Query query = this.sessionFactory.getCurrentSession().createQuery(hql);
if(parameters != null && parameters.length > 0)
{
for(int i = 0; i < parameters.length; i++)
{
query.setParameter(i, parameters[i]);
}
}
return query.setFirstResult((pageNow-1)*pageSize).setMaxResults(pageSize).list();
}
public void add(Object obj)
{
this.sessionFactory.getCurrentSession().save(obj);
}
public List executeUpdate(String hql, Object[] parameters)
{
// TODO Auto-generated method stub
return null;
}
public Object uniqueQuery(String hql, Object[] parameters)
{
Query query = this.sessionFactory.getCurrentSession().createQuery(hql);
//给？赋值
if(parameters != null && parameters.length > 0)
{
for(int i = 0;i < parameters.length;i++)
{
query.setParameter(i, parameters[i]);
}
}
return query.uniqueResult();
}
public int queryPageCount(String hql, Object[] parameters, int pageSize)
{
Object obj = this.uniqueQuery(hql, parameters);
int rowCount = Integer.parseInt(obj.toString());
return (rowCount-1)/pageSize + 1;
}
}
修改EmployeeServiceInter
package com.cdtax.service.interfaces;
import java.util.List;
import com.cdtax.basic.BasicServiceInter;
import com.cdtax.domain.Employee;
public interface EmployeeServiceInter extends BasicServiceInter
{
//显示所有雇员
public List showEmployeeList(int pageSize,int pageNow);
//如果该雇员存在，则返回该雇员的完整信息，否则返回null
public Employee checkEmployee(Employee e);
public int getPageCount(int pageSize);
}修改EmployeeService
package com.cdtax.service.impl;
import java.io.Serializable;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.springframework.transaction.annotation.Transactional;
import com.cdtax.basic.BasicService;
import com.cdtax.domain.Department;
import com.cdtax.domain.Employee;
import com.cdtax.service.interfaces.EmployeeServiceInter;
//这里配置@Tansactional用处是让spring的事务管理器接管该service的事务
//如果只想让事务管理器管理某个方法中的事务，那么就将注解加到方法上
public class EmployeeService extends BasicService implements EmployeeServiceInter
{
//显示所有雇员
public List showEmployeeList(int pageSize,int pageNow)
{
String hql = "from Employee order by id";
return this.executeQueryByPage(hql, null, pageNow, pageSize);
}
public int getPageCount(int pageSize)
{
String hql = "Select count(*) from Employee";
return this.queryPageCount(hql, null, pageSize);
}
//验证用户
public Employee checkEmployee(Employee e)
{
String hql="from Employee where id=? and pwd=?";
Object[] parameters = {e.getId(),e.getPwd()};
List list = this.executeQuery(hql, parameters);
if(list.size() == 0)
{
return null;
}
else
{
return (Employee)list.get(0);
}
}
}
修改EmployeeAction的goListEmp方法
public ActionForward goListEmp(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
String s_pageNow = request.getParameter("pageNow");
int pageNow = 1;
if(s_pageNow != null)
{
pageNow = Integer.parseInt(s_pageNow);
}
//将查询的结果保存到request中返回到前台页面
request.setAttribute("emplist", employeeService.showEmployeeList(3,pageNow));
int pageCount = employeeService.getPageCount(3);
request.setAttribute("pageCount", pageCount);
//打通流程
return mapping.findForward("goListEmp");
}修改显示：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
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 'listEmp.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>
<h1>雇员信息</h1>
<table>
<tr><td>id</td><td>name</td><td>email</td><td>grade</td><td>salary</td><td>修改</td><td>删除</td></tr>
<c:forEach items="${emplist }" var="emp">
<tr><td>${emp.id }</td><td>${emp.name }</td>
<td>${emp.email }</td><td>${emp.grade }</td>
<td>${emp.salary }</td><td><a href="">修改用户</a></td>
<td><a href="">删除用户</a></td></tr>
</c:forEach>
</table>
<c:forEach var="i" begin="1" end="${pageCount }">
<a href="${pageContext.request.contextPath}/employee.do?flag=goListEmp&pageNow=${i }">${i }</a>
</c:forEach>
</body>
</html>
做删除用户模块：
listEmp.jsp：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'listEmp.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" language="javascript" src="/myssh/js/jquery-1.8.0.js"></script>
<script type="text/javascript" language="javascript" src="/myssh/js/my.js"></script>
</head>
<body>
<h1>雇员信息</h1>
<table>
<tr><td>id</td><td>name</td><td>email</td><td>grade</td><td>salary</td><td>修改</td><td>删除</td></tr>
<c:forEach items="${emplist }" var="emp">
<tr><td>${emp.id }</td><td>${emp.name }</td>
<td>${emp.email }</td><td>${emp.grade }</td>
<td>${emp.salary }</td><td><a href="">修改用户</a></td>
<td><a class="delid" href="${pageContext.request.contextPath}/employee.do?flag=delEmp&id=${emp.id }">删除用户</a></td></tr>
</c:forEach>
</table>
<c:forEach var="i" begin="1" end="${pageCount }">
<a href="${pageContext.request.contextPath}/employee.do?flag=goListEmp&pageNow=${i }">${i }</a>
</c:forEach>
</body>
</html>
这里引入了jquery，在删除的时候弹出一个提示框，询问是否确认删除。
my.js
$(document).ready(function(){
$(".delid").click(function(){
window.confirm("你确定删除吗？");
});
});修改EmployeeAction，增加delEmp方法
public ActionForward delEmp(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//获取雇员id
String id = request.getParameter("id");
System.out.println("删除id=" + id);
try
{
employeeService.delById(Employee.class,Integer.parseInt(id));
}
catch(Exception e)
{
return mapping.findForward("opererr");
}
//打通流程
return mapping.findForward("operok");
}
这里又增加一个根据id删除的方法：
package com.cdtax.basic;
import java.util.List;
public interface BasicServiceInter
{
//声明一些常用的方法
//1.通过id获取对象
public Object findById(Class clazz,java.io.Serializable id);
//2.查询方法 hql-->hibernate
public List executeQuery(String hql,Object[] parameters);
//3.查询方法 带分页
public List executeQueryByPage(String hql,Object[] parameters,int pageNow,int pageSize);
//4.添加一个对象
public void add(Object obj);
//5.统一的执行hql->删除、修改 hql="update domain对象 where ？"
public List executeUpdate(String hql,Object[] parameters);
//6、返回一个对象的操作
public Object uniqueQuery(String hql,Object[] parameters);
//7、得到hql，返回pageCount
public int queryPageCount(String hql,Object[] parameters,int pageSize);
//8、根据id号删除对象
public void delById(Class clazz,java.io.Serializable id);
}
BasicService抽象类中增加方法
public void delById(Class clazz,Serializable id)
{
Session session = this.sessionFactory.getCurrentSession();
session.delete(this.findById(clazz, id));
}
添加雇员成功后的界面中的返回主界面模块operok.jsp：
<body>
<h1>恭喜你，操作成功</h1> <br>
<a href="#">返回继续添加</a><br/>
<a href="${pageContext.request.contextPath}/login.do?flag=goMainFrame">返回主界面</a>
<!-- 注意/WEB-INF文件夹是不能通过浏览器直接访问的
<a href="/WEB-INF/mainFrame.jsp">返回主界面</a>
-->
</body>
LoginAction中增加goMainFrame方法，跳转到主页面需要再次确认用户信息是否存在，不存在要跳到登陆页面。
public ActionForward goMainFrame(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception
{
if(request.getSession().getAttribute("loginer") != null)
{
return mapping.findForward("ok");
}
return mapping.findForward("err");
}
修改雇员信息：
修改listEmp.jsp
<body>
<h1>雇员信息</h1>
<table>
<tr><td>id</td><td>name</td><td>email</td><td>grade</td><td>salary</td><td>修改</td><td>删除</td></tr>
<c:forEach items="${emplist }" var="emp">
<tr><td>${emp.id }</td><td>${emp.name }</td>
<td>${emp.email }</td><td>${emp.grade }</td>
<td>${emp.salary }</td><td><a href="${pageContext.request.contextPath}/employee.do?flag=goUdEmpUi&id=${emp.id }">修改用户</a></td>
<td><a class="delid" href="${pageContext.request.contextPath}/employee.do?flag=delEmp&id=${emp.id }">删除用户</a></td></tr>
</c:forEach>
</table>
<c:forEach var="i" begin="1" end="${pageCount }">
<a href="${pageContext.request.contextPath}/employee.do?flag=goListEmp&pageNow=${i }">${i }</a>
</c:forEach>
</body>
根据用户Id调用goUdEmpUi方法，跳转到雇员修改页面updEmpUi.jsp
在EmployeeAction中增加方法goUdEmpUi
public ActionForward goUdEmpUi(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//获取雇员id
String id = request.getParameter("id");
//获取雇员
Employee e = (Employee) employeeService.findById(Employee.class, Integer.parseInt(id));
//显示雇员信息，在下一个页面显示
request.setAttribute("emp", e);
return mapping.findForward("goUpdEmpUi");
}updEmpUi.jsp：
<%@ 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 'updEmpUi.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="${pageContext.request.contextPath}/employee.do?flag=updEmp" method="post">
<table>
<tr><td>id</td><td><input type="text" name="id" readonly="readonly" value="${emp.id }" /></td></tr>
<tr><td>name</td><td><input type="text" name="name" value="${emp.name }" /></td></tr>
<tr><td>email</td><td><input type="text" name="email" value="${emp.email }" /></td></tr>
<tr><td>grade</td><td><input type="text" name="grade" value="${emp.grade }" /></td></tr>
<tr><td>pwd</td><td><input type="text" name="pwd" value="${emp.pwd }"/></td></tr>
<tr><td>salary</td><td><input type="text" name="salary" value="${emp.salary }"/></td></tr>
<tr><td>department</td>
<td>
<!-- 这里的部门信息，应该从数据库提取，而不应该写死 -->
<select name="departmentId">
<option value="1">财务部</option>
</select>
</td>
</tr>
<tr><td><input type="submit" value="修改" /></td>
<td><input type="reset" value="重置" /></td></tr>
</table>
</form>
</body>
</html>
id不能修改，使用readonly属性
提交修改的方法，在EmployeeAction中增加方法updEmp，对修改信息进行提交
public ActionForward updEmp(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception
{
//获取表单
EmployeeForm ef = (EmployeeForm)form;
//ef->domain
Employee employee = new Employee();
employee.setId(Integer.parseInt(ef.getId()));
employee.setEmail(ef.getEmail());
employee.setGrade(Integer.parseInt(ef.getGrade()));
employee.setPwd(ef.getPwd());
employee.setName(ef.getName());
employee.setSalary(Float.parseFloat(ef.getSalary()));
employee.setDepartment((Department)departmentService.findById(Department.class,Integer.parseInt(ef.getDepartmentId())));
try
{
employeeService.update(employee);
}
catch(Exception e)
{
return mapping.findForward("opererr");
}
return mapping.findForward("operok");
}
struts-config.xml中增加一条跳转
<action path="/employee" name="employeeForm" parameter="flag"> <forward name="goAddEmp" path="/WEB-INF/addemp.jsp" /> <forward name="goListEmp" path="/WEB-INF/listEmp.jsp"></forward> <forward name="goUpdEmpUi" path="/WEB-INF/updEmpUi.jsp"></forward> </action>基础接口中增加方法
//9、通过object修改 public void update(Object obj);基础抽象实现类
public void update(Object obj)
{
this.sessionFactory.getCurrentSession().update(obj);
}
整个项目完成。整体流程图
