传智播客-----OA页面的增删改查

今天汤老师给我们讲了oa页面的增删改查！

1，介绍
组织机构
审批流转
信息发布
知识管理
网上交流、即时通讯
实用工具
...

struts1.3.8 + hibernate3.2 + jbpm3.2.2 + junit4
view + service(service + dao)

0，准备环境
  1，目录结构
  2，框架环境
  3，事务控制
1，组织机构
  1，部门
   1，列表
    显示同一层的部门列表
    默认显示最顶级的部门
   2，添加
    显示所有的部门列表，有层次
    添加完后转到新增的部门所在的列表页面
   3，删除
    不能删除含有子部门的部门
  2，员工
   1，添加
    员工属于一个部门
    员工可以有职务
2，审批流转


2，准备环境
  1，创建目录结构
  2，添加框架环境
     1，struts, jstl, jbpm(hibernate)与jdbc驱动, junit的jar与配置文件
     2，解决struts与hibernate的jar包冲突问题
     3，修改数据库连接信息并创建数据库表
  -，显示层与业务层结构
     1，设计
     2，BaseService与BaseAction
      public class DepartmentAction extends BaseAction {

/**
  * 树状显示所有的部门
  */
public ActionForward tree(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
   throws Exception {
  return mapping.findForward("tree");
}

/**
  * 显示同级的部门列表，默认显示最顶级的部门列表 parentId=5
  */
public ActionForward list(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
   throws Exception {
  DepartmentActionForm actionForm = (DepartmentActionForm) form;
  Department parent = departmentService.getDepartment(actionForm.getParentId()); //
  request.setAttribute("parent", parent);

  List<Department> depts = departmentService.findDepartments(parent);
  request.setAttribute("depts", depts);
  return mapping.findForward("list");
}

/**
  * 添加页面
  */
public ActionForward addUI(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
   throws Exception {
  List<Department> depts = departmentService.findAll();
  request.setAttribute("allDepts", depts);
  return mapping.findForward("saveUI");
}

/**
  * 添加
  */
public ActionForward add(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
   throws Exception {
  DepartmentActionForm actionForm = (DepartmentActionForm) form;
  Department parent = departmentService.getDepartment(actionForm.getParentId());

  Department department = new Department();
  department.setName(actionForm.getName());
  department.setParent(parent); // null

  departmentService.addDepartment(department);

  ActionForward af = mapping.findForward("toList");
  return new ActionForward(af.getPath() + "&parentId=" + actionForm.getParentId(), af.getRedirect());
}

/**
  * 修改页面
  */
public ActionForward editUI(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
   throws Exception {

  // 1，准备actionForm
  DepartmentActionForm actionForm = (DepartmentActionForm) form;
  Department department = departmentService.getDepartment(actionForm.getId());
  actionForm.setName(department.getName());
  if (department.getParent() != null) {
   actionForm.setParentId(department.getParent().getId());
  }

  // 2，准备 allDepts
  List<Department> depts = departmentService.findAll();
  request.setAttribute("allDepts", depts);

  return mapping.findForward("saveUI"); // forward
}

/**
  * 修改
  */
public ActionForward edit(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
   throws Exception {
  DepartmentActionForm actionForm = (DepartmentActionForm) form;
  Department parent = departmentService.getDepartment(actionForm.getParentId());

  Department department = departmentService.getDepartment(actionForm.getId());
  department.setName(actionForm.getName());
  department.setParent(parent); // null

  departmentService.updateDepartment(department);

  ActionForward af = mapping.findForward("toList");
  return new ActionForward(af.getPath() + "&parentId=" + actionForm.getParentId(), af.getRedirect());
}

/**
  * 删除
  */
public ActionForward del(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
   throws Exception {
  DepartmentActionForm actionForm = (DepartmentActionForm) form;
  try {
   departmentService.delDepartment(actionForm.getId());
  } catch (NotEmptyException e) {
   ActionErrors errors = new ActionErrors();
   errors.add("del", new ActionMessage(e.getMessage(), false));
   saveErrors(request, errors);

   ActionForward af = mapping.findForward("toList");
   // 出错后，应转发到列表页面
   return new ActionForward(af.getPath() + "&parentId=" + actionForm.getParentId(), false);
  }

  ActionForward af = mapping.findForward("toList");
  return new ActionForward(af.getPath() + "&parentId=" + actionForm.getParentId(), af.getRedirect());
}
}
  3，事务与JbpmContext管理
     1，设计
       1，自己用的Session与JbpmContext中的Session要是同一个
       2，如果请求没有用到JbpmContext（如转到页面），就不要创建他
     2，JbpmContextManager
     3，JbpmContextFilter
     4，BaseService 中的 getJbpmContext() 与 getSession()
 
public class JbpmContextManager {
private static final ThreadLocal<JbpmContext> threadLocal = new ThreadLocal<JbpmContext>();
private static JbpmConfiguration jbpmConfiguration = JbpmConfiguration.getInstance();

/**
  * 获取与当前线程对应的JbpmContext
  *
  * @param create
  *            当前线程没有对应的JbpmContext时，是否创建一个新的JbpmContext，并且对应起来
  */
public static JbpmContext getCurrentJbpmContext(boolean create) {
  JbpmContext jbpmContext = threadLocal.get();
  if (jbpmContext == null && create) {
   System.out.println("创建 JbpmContext ...");
   jbpmContext = jbpmConfiguration.createJbpmContext();
   threadLocal.set(jbpmContext);
  }
  return jbpmContext;
}

/**
  * 关闭当前线程对应的JbpmContext，并且移除关联
  */
public static void closeCurrentJbpmContext() {
  JbpmContext jbpmContext = threadLocal.get();
  if (jbpmContext != null) {
   jbpmContext.close();
   threadLocal.remove();
  }
}
}

  4，解决提交表单内容的中文乱码的问题
public class JbpmContextFilter implements Filter {

public void destroy() {
}

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
   ServletException {
  try {
   request.setCharacterEncoding("utf-8");
   chain.doFilter(request, response);
  } catch (Exception e) {
   JbpmContext jbpmContext = JbpmContextManager.getCurrentJbpmContext(false);
   if (jbpmContext != null) {
    jbpmContext.setRollbackOnly();
   }
   throw new ServletException(e);
  } finally {
   JbpmContextManager.closeCurrentJbpmContext();
  }
}

public void init(FilterConfig filterConfig) throws ServletException {
}

}

3，组织机构管理
   1，介绍需求（页面效果）
   2，设计实体，写映射文件
1.<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="cn.itcast.oa.entities">
<class name="Department" table="itcast_department">
  <id name="id">
   <generator class="native" />
  </id>
  <property name="name" />
 
  <many-to-one name="parent" column="parentId"></many-to-one>
 
  <set name="children">
   <key column="parentId"></key>
   <one-to-many class="Department" />
  </set>
</class>
</hibernate-mapping>

2.<hibernate-mapping package="cn.itcast.oa.entities">
    <class name="Employee" table="itcast_employee">
        <id name="id">
            <generator class="native"/>
        </id>
        <property name="loginName"/>
        <property name="password"/>
       
        <property name="name"/>
        <many-to-one name="department" column="departmentId"></many-to-one>
        <set name="roles" table="itcast_employee_role">
         <key column="employeeId"></key>
         <many-to-many class="Role" column="roleId"></many-to-many>
        </set>
       
        <property name="sex"/>
        <property name="birthday" type="date"/>
        <property name="phoneNumber"/>
        <property name="email"/>
        <property name="description"/>
    </class>
</hibernate-mapping>

3.<hibernate-mapping package="cn.itcast.oa.entities">
    <class name="Role" table="itcast_role">
        <id name="id">
            <generator class="native"/>
        </id>
        <property name="name"/>
        <property name="description"/>
    </class>
</hibernate-mapping>
   3，部门的树形显示
      1，显示所有部门的名称
      2，显示所有部门时用全角空格分出层次
      3，xTree的使用
      4，在页面中使用xTree显示树状部门列表
      5，在页面中显示模式（与非模式）对话框
      6，在模式对话框中选择一个部门，就会更新员工所属部门的信息