ssh之雇员管理系统（8）-增加其他功能

一、增加雇员

前面我们已经讲得有大部分关键技术啦，而现在也就是我们要扩展，写出来自己的水平啦，当然，逻辑和你的经验将是成功的保障。

• 增加雇员的话，我们先将这个页面打通

    <a href="${pageContext.request.contextPath}/employee.do?flag=addEmpUi">添加雇员</a><br/>

这句话中flag是你要调用的那个函数的名称，那我们就开始写这个函数，我们将这些逻辑都写在叫EmployeeAction.java的action类中

    public ActionForward addEmpUi(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        // TODO Auto-generated method stub
        return mapping.findForward("addEmpUi");
    }

这个就是我们调转页面的函数，相信大家都能一目了然啦吧。

那我们这时候就得配置页面跳转的逻辑啦，看struts-config.xml啦，在<action-mapping>中添加这个页面跳转。

        <action path="/employee" name="employeeForm" parameter="flag">
            <forward name="addEmpUi" path="/WEB-INF/addEmpUi.jsp" />
        </action>

别忘啦在applicationContext.xml中配置这个action，以为spring接管啦struts，那他就接管啦struts的action。

    <bean id="departmentService" class="com.wang.service.imp.DepartmentService">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

• 那我们就得触及到spring啦，注入。。。那怎样注入呢？

先把添加雇员的表单的信息取到吧，我们还根据原先的表单EmployeeForm.java来配置吧，这样省事啦，

package com.wang.web.form;

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) {
        this.id = id;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    
}

现在我们表单啦，我们还得再action中添加一个叫addEmp的方法，来接收表单的信息啦，但是当我们接收后，添加到Employee类中，那个部门的字段怎么办，他是这样定义的饿，private Department department;  我们从表单中取到的是部门的id，这里是部门的对象，所以我们就得建一个接口为DepartmentInterfaces.java，看到我们这个方法getDepartmentById，根据id得到部门对象，所以当然是返回Department类型，有一个参数用于接收id

package com.wang.service.interfaces;

import java.io.Serializable;

import com.wang.domain.Department;

public interface DepartmentInterfaces {

    //增加部门的方法
    public void addDepartment(Department d); 
    
    //根据department的id得到部门名称
    public Department getDepartmentById(Serializable id);
}

现在去实现这个接口DepartmentService.java,

package com.wang.service.imp;

import java.io.Serializable;

import org.hibernate.SessionFactory;
import org.springframework.transaction.annotation.Transactional;

import com.wang.domain.Department;
import com.wang.service.interfaces.DepartmentInterfaces;

@Transactional
public class DepartmentService implements DepartmentInterfaces {

    public SessionFactory sessionFactory;
    public SessionFactory getSessionFactory() {
        return sessionFactory;
    }
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }
    
    public void addDepartment(Department d) {
        // TODO Auto-generated method stub
        sessionFactory.getCurrentSession().save(d);
    }
    public Department getDepartmentById(Serializable id) {

        return (Department) sessionFactory.getCurrentSession().get(Department.class, id);
    }
}

现在是关键所在，action类中这样取得注入的bean呢，EmployeeAction.java

package com.wang.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.wang.domain.Department;
import com.wang.domain.Employee;
import com.wang.service.imp.DepartmentService;
import com.wang.service.imp.EmployeeService;
import com.wang.service.interfaces.DepartmentInterfaces;
import com.wang.service.interfaces.EmployeeServiceInter;
import com.wang.web.form.EmployeeForm;

public class EmployeeAction extends DispatchAction {
    
    public DepartmentInterfaces departmentInterfaces;
    public EmployeeServiceInter employeeServiceInter;
    public void setEmployeeServiceInter(EmployeeServiceInter employeeServiceInter) {
        this.employeeServiceInter = employeeServiceInter;
    }

    public void setDepartmentInterfaces(DepartmentInterfaces departmentInterfaces) {
        this.departmentInterfaces = departmentInterfaces;
    }

    public ActionForward addEmpUi(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        // TODO Auto-generated method stub
        return mapping.findForward("addEmpUi");
    }
    
    /**
     * 用于添加雇员的处理函数
     * @param mapping
     * @param form
     * @param request
     * @param response
     * @return
     * @throws Exception
     */
    public ActionForward addEmp(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        EmployeeForm employeeForm = (EmployeeForm)form;
        Employee employee = new Employee();
        employee.setEmail(employeeForm.getEmail());
        employee.setGrade(Integer.parseInt(employeeForm.getGrade()));
        employee.setName(employeeForm.getName());
        employee.setPwd(employeeForm.getPwd());
        employee.setSalary(Float.parseFloat(employeeForm.getSalary()));
        
        //怎样取得department呢
        employee.setDepartment(departmentInterfaces.getDepartmentById(Integer.parseInt(employeeForm.getDepartmentId())));
        employeeServiceInter.addEmployee(employee);
        if(employee!=null){
            return mapping.findForward("opereok");
        }else {
            return mapping.findForward("opererr");
        }
    }
}

最后在applicationContext.xml中配置注入

    <!-- 使用注解的方式配置逻辑对象 -->
    <bean id="employeeService" class="com.wang.service.imp.EmployeeService" />

    <bean id="departmentService" class="com.wang.service.imp.DepartmentService">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

    <!-- 配置action -->
    <bean name="/login" scope="prototype" class="com.wang.web.action.LoginAction">
        <property name="employeeServiceInter" ref="employeeService"></property>
    </bean>

    <bean name="/employee" scope="prototype" class="com.wang.web.action.EmployeeAction">
        <property name="departmentInterfaces" ref="departmentService"></property>
        <property name="employeeServiceInter" ref="employeeService"></property>
    </bean>