SSH分頁實現-DepartmentAction類的編寫（3）

編寫DepartmentAction類：

@Controller
@Scope("prototype")
public class DepartmentAction extends ActionSupport implements ModelDriven<Department> {

	@Resource
	private DepartmentService departmentService;

	private Long parentId;

	private int pageNum = 1;// 當前頁
	private int pageSize = 2;// 每頁顯示多少條數據

	private Department department = new Department();

	@Override
	public Department getModel() {
		return department;
	}

	/**
	 * 刪除
	 * 
	 * @return
	 * @throws Exception
	 */
	public String delete() throws Exception {
		departmentService.delete(department.getId());
		return "toList";
	}

	/**
	 * 增加頁面
	 * 
	 * @return
	 * @throws Exception
	 */
	public String addUI() throws Exception {
		// 顯示所有部門(準備數據，department列表)
		List<Department> departmentList = departmentService.findAll();
		// 放到Map中
		ActionContext.getContext().put("departmentList", departmentList);
		return "saveDepartmentUI";
	}

	/**
	 * 添加
	 * 
	 * @return
	 * @throws Exception
	 */
	public String add() throws Exception {
		// 根據ID查詢部門信息
		Department parent = departmentService.findById(parentId);
		// 設置上級部門信息
		department.setParent(parent);

		// 添加部門信息
		departmentService.add(department);
		return "toList";
	}

	/**
	 * 修改頁面
	 * 
	 * @return
	 * @throws Exception
	 */
	public String editorUI() throws Exception {
		// 顯示所有部門(準備數據，department列表)
		List<Department> departmentList = departmentService.findAll();
		// 放到Map中
		ActionContext.getContext().put("departmentList", departmentList);

		// 準備回顯數據
		Department departmentResult = departmentService.findById(department.getId());
		ActionContext.getContext().getValueStack().push(departmentResult);

		// 給所屬部門設值回顯(相對應的屬性有值)
		if (departmentResult.getParent() != null) {
			parentId = departmentResult.getParent().getId();
		}
		return "saveDepartmentUI";
	}

	/**
	 * 修改
	 * 
	 * @return
	 * @throws Exception
	 */
	public String editor() throws Exception {
		// 取出原對象
		Department departmentResult = departmentService.findById(department.getId());
		// 更新到原對象信息
		departmentResult.setName(department.getName());
		departmentResult.setDescription(department.getDescription());
		departmentResult.setParent(departmentService.findById(parentId));// 設置上級部門
		// 修改
		departmentService.update(departmentResult);
		return "toList";
	}

	/**
	 * 分頁
	 * 
	 * @return
	 */
	public String showBypage() throws Exception {
		//List<Department> departmentList =departmentService.findAll();
		Department department =null;
		
		PageBean pageBean = departmentService.getPageBeanByDepartment(pageNum,pageSize,department);

		ActionContext.getContext().getValueStack().push(pageBean);
		return "showBypage";

	}

	public Long getParentId() {
		return parentId;
	}

	public void setParentId(Long parentId) {
		this.parentId = parentId;
	}

	public int getPageNum() {
		return pageNum;
	}

	public void setPageNum(int pageNum) {
		this.pageNum = pageNum;
	}

	public int getPageSize() {
		return pageSize;
	}

	public void setPageSize(int pageSize) {
		this.pageSize = pageSize;
	}

}

departmentService類

@Service
@Transactional
@SuppressWarnings("unchecked")
public class DepartmentServiceImpl implements DepartmentService{

	@Resource
	private  DepartmentDao departmentDao ;
	
	@Resource
	private SessionFactory sessionFactory ;
	
	
	@Override
	public List<Department> findAll() {
		// TODO Auto-generated method stub
		return departmentDao.findAll();
	}

	@Override
	public void delete(Long id) {
		departmentDao.delete(id);
	}

	@Override
	public void add(Department department) {
		departmentDao.save(department);
	}

	@Override
	public Department findById(Long id) {
		return departmentDao.getById(id);
	}

	@Override
	public void update(Department department) {
		departmentDao.update(department);
	}

	@Override
	public List<Department> findTopList() {
		return sessionFactory.getCurrentSession().createQuery("" +
				"FROM Department d WHERE d.parent IS NULL" +
				"").list();
	}

	@Override
	public List<Department> findChildList(Long parentId) {
		return sessionFactory.getCurrentSession().createQuery("" +
				"FROM Department d WHERE d.parent.id =?")
				.setParameter(0, parentId)
				.list();
	}

	@Override
	public PageBean getPageBeanByDepartment(int pageNum, int pageSize, Department departmentResult) {

		List list = sessionFactory.getCurrentSession().createQuery("" +
				"FROM Department d order BY d.name ASC")
				.setFirstResult((pageNum-1)*pageSize)
				.setMaxResults(pageSize)
				.list();
		Long count =(Long)sessionFactory.getCurrentSession().createQuery("" +
				"SELECT COUNT(*) FROM Department d ").uniqueResult();
		
		
		return new PageBean(pageNum, pageSize, count.intValue(), list);
	}
}

struts2.xml

<!-- 部門管理 -->
<action name="department_*" class="departmentAction" method="{1}">
	<result name="list"> /WEB-INF/jsp/departmentAction/list.jsp</result>
	<result name="showBypage"> /WEB-INF/jsp/departmentAction/list.jsp</result>
	<result name="saveDepartmentUI"> /WEB-INF/jsp/departmentAction/saveDepartmentUI.jsp</result>
	<result name="toList" type="redirectAction">department_showBypage?parentId=${parentId}</result>
</action>