SSH 简单使用示范
BaseDao:
package cn.itcast.oa.base;
import java.util.List;
/**
* baseDao 公共借口
* @author Administrator
*
* @param <T>
*/
public interface BaseDao<T> {
/**
* 保存实体
* @param entity
*/
void save(T entity);
/**
* 删除实体
* @param id
*/
void delete(Long id);
/**
* 更新实体
* @param entity
*/
void update(T entity);
/**
* 根据id查找
* @param id
* @return
*/
T getById(Long id);
/**
* 根据ID查询
* @param ids
* @return
*/
List<T> findByIds(Long[] ids);
/**
* 查询所有的集合
* @return
*/
List<T> findAll();
} |
BaseDaoImpl
package cn.itcast.oa.base;
import java.lang.reflect.ParameterizedType;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.*;
/**
* DAO公告实现类
*
* @author Administrator
*
* @param <E>
*/
@SuppressWarnings("unchecked")
public class BaseDaoImpl<E> implements BaseDao<E> {
@Resource
private SessionFactory sessionFactory;
private Class<E> clazz ;
//构造方法
public BaseDaoImpl(){
//使用反射得到类型
ParameterizedType pt = (ParameterizedType) this.getClass().getGenericSuperclass();//获取当前new对象的泛型对象父类
this.clazz =(Class<E>) pt.getActualTypeArguments()[0] ;//获取第一个类型的真实类型
}
/**
* 获得当前的可用session
* @return
*/
protected Session getSession() {
return sessionFactory.getCurrentSession();
}
@Override
public void save(E entity) {
getSession().save(entity);
}
@Override
public void delete(Long id) {
Object obj = getById(id);
if (obj != null) {
getSession().delete(obj);
}
}
@Override
public void update(E entity) {
getSession().update(entity);
}
@Override
public E getById(Long id) {
if (id ==null) {
return null;
}else {
return (E) getSession().get(clazz, id);
}
}
@Override
public List<E> findByIds(Long[] ids) {
return getSession().createQuery(//
"FROM " + clazz.getSimpleName()+"WHERE id IN(:ids)")//
.setParameterList("ids", ids)
.list();
}
@Override
public List<E> findAll() {
return getSession().createQuery(//
"FROM " + clazz.getSimpleName())//
.list();
}
} |
DepartmentAction类
package cn.itcast.oa.view;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import cn.itcast.oa.domain.Department;
import cn.itcast.oa.domain.PageBean;
import cn.itcast.oa.domain.Role;
import cn.itcast.oa.service.DepartmentService;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
@Controller
@Scope("prototype")
public class DepartmentAction extends ActionSupport implements ModelDriven<Department> {
@Resource
private DepartmentService departmentService;
private Long parentId;
private int pageNum = 1;// 当前页
private int pageSize = 2;// 每页显示多少条数据
private Department department = new Department();
@Override
public Department getModel() {
return department;
}
/**
* 列表
*
* @return
* @throws Exception
*/
public String list() throws Exception {
List<Department> departmentList = null;
if (parentId == null) {
departmentList = departmentService.findTopList();
} else {
departmentList = departmentService.findChildList(parentId);
Department parent = departmentService.findById(parentId);
}
// List<Department> departmentList = departmentService.findAll();
ActionContext.getContext().put("departmentList", departmentList);
return "list";
}
/**
* 删除
*
* @return
* @throws Exception
*/
public String delete() throws Exception {
departmentService.delete(department.getId());
return "toList";
}
/**
* 增加页面
*
* @return
* @throws Exception
*/
public String addUI() throws Exception {
// 显示所有部门(准备数据，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 {
// 根据ID查询部门信息
Department parent = departmentService.findById(parentId);
// 设置上级部门信息
department.setParent(parent);
// 添加部门信息
departmentService.add(department);
return "toList";
}
/**
* 修改页面
*
* @return
* @throws Exception
*/
public String editorUI() throws Exception {
// 显示所有部门(准备数据，department列表)
List<Department> departmentList = departmentService.findAll();
// 放到Map中
ActionContext.getContext().put("departmentList", departmentList);
// 准备回显数据
Department departmentResult = departmentService.findById(department.getId());
ActionContext.getContext().getValueStack().push(departmentResult);
// 给所属部门设值回显(相对应的属性有值)
if (departmentResult.getParent() != null) {
parentId = departmentResult.getParent().getId();
}
return "saveDepartmentUI";
}
/**
* 修改
*
* @return
* @throws Exception
*/
public String editor() throws Exception {
// 取出原对象
Department departmentResult = departmentService.findById(department.getId());
// 更新到原对象信息
departmentResult.setName(department.getName());
departmentResult.setDescription(department.getDescription());
departmentResult.setParent(departmentService.findById(parentId));// 设置上级部门
// 修改
departmentService.update(departmentResult);
return "toList";
}
/**
* 分页
*
* @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
package cn.itcast.oa.service;
import java.util.List;
import javax.annotation.Resource;
import cn.itcast.oa.dao.DepartmentDao;
import cn.itcast.oa.domain.Department;
import cn.itcast.oa.domain.PageBean;
public interface DepartmentService {
/**
* 查询所有
* @return
*/
List<Department> findAll();
/**
* 删除
* @param id
*/
void delete(Long id);
/**
* 添加
* @param role
*/
void add(Department department);
/**
* 根据ID查找
* @param id
* @return
*/
Department findById(Long id);
/**
* 修改
* @param role
*/
void update(Department department);
/**
* 查找顶级部门
* @return
*/
List<Department> findTopList();
/**
* 查找子部门
* @param parentId
* @return
*/
List<Department> findChildList(Long parentId);
/**
* 根据条件封装pageBean
* @param pageNum
* @param pageSize
* @param departmentResult
* @return
*/
PageBean getPageBeanByDepartment(int pageNum, int pageSize, Department departmentResult);
} |
DepartmentServiceImpl
package cn.itcast.oa.service.impl;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.SessionFactory;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.sun.org.apache.bcel.internal.generic.GETSTATIC;
import cn.itcast.oa.dao.DepartmentDao;
import cn.itcast.oa.domain.Department;
import cn.itcast.oa.domain.PageBean;
import cn.itcast.oa.service.DepartmentService;
@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);
}
} |
DepartmentDao
package cn.itcast.oa.dao;
import java.util.List;
import cn.itcast.oa.base.BaseDao;
import cn.itcast.oa.domain.Department;
public interface DepartmentDao extends BaseDao<Department> {
}
DepartmentDaoImpl
package cn.itcast.oa.dao.impl;
import org.springframework.stereotype.Repository;
import cn.itcast.oa.base.BaseDaoImpl;
import cn.itcast.oa.dao.DepartmentDao;
import cn.itcast.oa.domain.Department;
@Repository
public class DepartmentDaoImpl extends BaseDaoImpl<Department> implements DepartmentDao {
}
Department.java
package cn.itcast.oa.domain;
import java.util.HashSet;
import java.util.Set;
/**
* 部门
*
* @author tyg
*
*/
public class Department {
private Long id;
private Set<User> users = new HashSet<User>();
private Department parent;
private Set<Department> children = new HashSet<Department>();
private String name;
private String description;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Set<User> getUsers() {
return users;
}
public void setUsers(Set<User> users) {
this.users = users;
}
public Department getParent() {
return parent;
}
public void setParent(Department parent) {
this.parent = parent;
}
public Set<Department> getChildren() {
return children;
}
public void setChildren(Set<Department> children) {
this.children = children;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}
Department.hbm.xml
<?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="cn.itcast.oa.domain"> <class name="Department" table="t_department"> <id name="id"> <generator class="native" /> </id> <property name="name" /> <property name="description" /> <!-- users属性 ,本类与User 一对多 --> <set name="users"> <key column="departmentId"></key> <one-to-many class="User" /> </set> <!-- parent属性 ,本类与Department（上级）多对一 --> <many-to-one name="parent" class="Department" column="parentId" lazy="false"></many-to-one> <!-- children属性 ,本类与Department（下级）一对多 级联删除--> <set name="children" cascade="delete" lazy="false"> <key column="parentId"></key> <one-to-many class="Department" /> </set> </class> </hibernate-mapping>
struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<!-- 配置为开发模式 -->
<constant name="struts.devMode" value="true" />
<!-- 把扩展名配置为action -->
<constant name="struts.action.extension" value="action" />
<!-- 把主题设置为simple -->
<constant name="struts.ui.theme" value="simple" />
<package name="default" namespace="/" extends="struts-default">
<!-- 部门管理 -->
<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>
</package>
</struts>