实现增删该查的步骤:
一、做ACTION相关的准备:ACTION,jsp,配置.
package cn.itcast.oa.base;
import java.lang.reflect.ParameterizedType;
import javax.annotation.Resource;
import cn.itcast.oa.service.DepartmentService;
import cn.itcast.oa.service.RoleService;
import cn.itcast.oa.service.UserService;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
public abstract class BaseAction<T> extends ActionSupport implements ModelDriven<T>{
@Resource
protected RoleService roleService;
@Resource
protected DepartmentService departmentService;
@Resource
protected UserService userService;
protected T model;
public BaseAction() {
try {
// 得到model的类型信息 getClass得到子类,<span style="font-family: Arial, Helvetica, sans-serif; font-size: 12px;">getGenericSuperclass()得到该子类的父类,也就是该方法</span>
<span style="white-space:pre"> </span>//得到真实的参数类型<span style="font-family: Arial, Helvetica, sans-serif; font-size: 12px;">ParameterizedType </span>
<span style="white-space:pre"> </span>//得到第一个参数的真实参数类型
ParameterizedType pt = (ParameterizedType) this.getClass().getGenericSuperclass();
Class clazz = (Class) pt.getActualTypeArguments()[0];
// 通过反射生成model的实例
model = (T) clazz.newInstance();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public T getModel() {
return model;
}
}
package cn.itcast.oa.base;
import java.util.List;
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);
/**
* 查询实体,如果id为null,则返回null,并不会抛异常。
*
* @param id
* @return
*/
T getById(Long id);
/**
* 查询实体
*
* @param ids
* @return
*/
List<T> getByIds(Long[] ids);
/**
* 查询所有
*
* @return
*/
List<T> findAll();
}
package cn.itcast.oa.base;
import java.lang.reflect.ParameterizedType;
import java.util.Collections;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.transaction.annotation.Transactional;
// @Transactional注解可以被继承,即对子类也有效
@Transactional
@SuppressWarnings("unchecked")
public abstract class BaseDaoImpl<T> implements BaseDao<T> {
@Resource
private SessionFactory sessionFactory;
protected Class<T> clazz; // 这是一个问题!
public BaseDaoImpl() {
// 通过反射得到T的真实类型
ParameterizedType pt = (ParameterizedType) this.getClass().getGenericSuperclass();
this.clazz = (Class) pt.getActualTypeArguments()[0];
System.out.println("clazz = " + clazz.getName());
}
public void save(T entity) {
getSession().save(entity);
}
public void update(T entity) {
getSession().update(entity);
}
public void delete(Long id) {
Object obj = getSession().get(clazz, id);
getSession().delete(obj);
}
public T getById(Long id) {
if (id == null) {
return null;
}
return (T) getSession().get(clazz, id);
}
public List<T> getByIds(Long[] ids) {
if (ids == null || ids.length == 0) {
return Collections.EMPTY_LIST;
}
return getSession().createQuery(//
"FROM " + clazz.getSimpleName() + " WHERE id IN(:ids)")//
.setParameterList("ids", ids)//
.list();
}
public List<T> findAll() {
return getSession().createQuery(//
"FROM " + clazz.getSimpleName())//
.list();
}
/**
* 获取当前可用的Session
*
* @return
*/
protected Session getSession() {
return sessionFactory.getCurrentSession();
}
}
1. 创建实体
bean方法,并且添加get,set方法
package cn.itcast.oa.domain;
import java.util.HashSet;
import java.util.Set;
/**
* 用户
* @author tyg
*
*/
public class User {
<span style="white-space:pre"> </span>private Long id;
<span style="white-space:pre"> </span>private Department department;
<span style="white-space:pre"> </span>private Set<Role> roles = new HashSet<Role>();
<span style="white-space:pre"> </span>private String loginName; // 登录名
<span style="white-space:pre"> </span>private String password; // 密码
<span style="white-space:pre"> </span>private String name; // 真实姓名
<span style="white-space:pre"> </span>private String gender; // 性别
<span style="white-space:pre"> </span>private String phoneNumber; // 电话号码
<span style="white-space:pre"> </span>private String email; // 电子邮件
<span style="white-space:pre"> </span>private String description; // 说明
<span style="white-space:pre"> </span>public Long getId() {
<span style="white-space:pre"> </span>return id;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setId(Long id) {
<span style="white-space:pre"> </span>this.id = id;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public Department getDepartment() {
<span style="white-space:pre"> </span>return department;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setDepartment(Department department) {
<span style="white-space:pre"> </span>this.department = department;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public Set<Role> getRoles() {
<span style="white-space:pre"> </span>return roles;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setRoles(Set<Role> roles) {
<span style="white-space:pre"> </span>this.roles = roles;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public String getLoginName() {
<span style="white-space:pre"> </span>return loginName;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setLoginName(String loginName) {
<span style="white-space:pre"> </span>this.loginName = loginName;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public String getPassword() {
<span style="white-space:pre"> </span>return password;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setPassword(String password) {
<span style="white-space:pre"> </span>this.password = password;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public String getName() {
<span style="white-space:pre"> </span>return name;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setName(String name) {
<span style="white-space:pre"> </span>this.name = name;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public String getGender() {
<span style="white-space:pre"> </span>return gender;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setGender(String gender) {
<span style="white-space:pre"> </span>this.gender = gender;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public String getPhoneNumber() {
<span style="white-space:pre"> </span>return phoneNumber;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setPhoneNumber(String phoneNumber) {
<span style="white-space:pre"> </span>this.phoneNumber = phoneNumber;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public String getEmail() {
<span style="white-space:pre"> </span>return email;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setEmail(String email) {
<span style="white-space:pre"> </span>this.email = email;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public String getDescription() {
<span style="white-space:pre"> </span>return description;
<span style="white-space:pre"> </span>}
<span style="white-space:pre"> </span>public void setDescription(String description) {
<span style="white-space:pre"> </span>this.description = description;
<span style="white-space:pre"> </span>}
}
Hbm的方法确定
<?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.domain"> <span style="white-space:pre"> </span><class name="User" table="itcast_user"> <span style="white-space:pre"> </span><id name="id"> <generator class="native"/> <span style="white-space:pre"> </span></id> <span style="white-space:pre"> </span><property name="loginName"/> <span style="white-space:pre"> </span><property name="password"/> <span style="white-space:pre"> </span><property name="name"/> <span style="white-space:pre"> </span><property name="gender" /> <span style="white-space:pre"> </span><property name="phoneNumber"/> <span style="white-space:pre"> </span><property name="email"/> <span style="white-space:pre"> </span><property name="description"/> <span style="white-space:pre"> </span> <span style="white-space:pre"> </span><!-- department属性,本类与Department的多对一 --> <span style="white-space:pre"> </span><many-to-one name="department" class="Department" column="departmentId"></many-to-one> <span style="white-space:pre"> </span><!-- roles属性,本类与Role的多对多 --> <span style="white-space:pre"> </span><set name="roles" table="itcast_user_role"> <span style="white-space:pre"> </span><key column="userId"></key> <span style="white-space:pre"> </span><many-to-many class="Role" column="roleId"></many-to-many> <span style="white-space:pre"> </span></set> <span style="white-space:pre"> </span> <span style="white-space:pre"> </span></class> <span style="white-space:pre"> </span> </hibernate-mapping>二、ACTION方法,相应的方法
package cn.itcast.oa.view.action;
import java.util.HashSet;
import java.util.List;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import cn.itcast.oa.base.BaseAction;
import cn.itcast.oa.domain.Department;
import cn.itcast.oa.domain.Role;
import cn.itcast.oa.domain.User;
import cn.itcast.oa.util.DepartmentUtils;
import com.opensymphony.xwork2.ActionContext;
@Controller
@Scope("prototype")
public class UserAction extends BaseAction<User> {
private Long departmentId;
private Long[] roleIds;
/** 列表 */
public String list() throws Exception {
List<User> userList = userService.findAll();
ActionContext.getContext().put("userList", userList);
return "list";
}
/** 删除 */
public String delete() throws Exception {
userService.delete(model.getId());
return "toList";
}
/** 添加页面 */
public String addUI() throws Exception {
// 准备数据:departmentList,显示为树状结构
List<Department> topList = departmentService.findTopList();
List<Department> departmentList = DepartmentUtils.getAllDepartments(topList);
ActionContext.getContext().put("departmentList", departmentList);
// 准备数据:roleList
List<Role> roleList = roleService.findAll();
ActionContext.getContext().put("roleList", roleList);
return "saveUI";
}
/** 添加 */
public String add() throws Exception {
// 1,新建对象并设置属性(也可以使用model)
Department department = departmentService.getById(departmentId);
model.setDepartment(department);
List<Role> roleList = roleService.getByIds(roleIds);
model.setRoles(new HashSet<Role>(roleList));
String passwdMD5 = DigestUtils.md5Hex("1234");
model.setPassword(passwdMD5); // 默认密码为1234,应使用MD5摘要
// 2,保存到数据库
userService.save(model);
return "toList";
}
/** 修改页面 */
public String editUI() throws Exception {
// 准备数据:departmentList,显示为树状结构
List<Department> topList = departmentService.findTopList();
List<Department> departmentList = DepartmentUtils.getAllDepartments(topList);
ActionContext.getContext().put("departmentList", departmentList);
// 准备数据:roleList
List<Role> roleList = roleService.findAll();
ActionContext.getContext().put("roleList", roleList);
// 准备回显的数据
User user = userService.getById(model.getId());
ActionContext.getContext().getValueStack().push(user);
if (user.getDepartment() != null) {
departmentId = user.getDepartment().getId();
}
if (user.getRoles().size() > 0) {
roleIds = new Long[user.getRoles().size()];
int index = 0;
for (Role role : user.getRoles()) {
roleIds[index++] = role.getId();
}
}
return "saveUI";
}
/** 修改 */
public String edit() throws Exception {
// 1,从数据库中取出原对象
User user = userService.getById(model.getId());
// 2,设置要修改的属性
// >> 普通属性
user.setLoginName(model.getLoginName());
user.setName(model.getName());
user.setGender(model.getGender());
user.setPhoneNumber(model.getPhoneNumber());
user.setEmail(model.getEmail());
user.setDescription(model.getDescription());
// >> 所属部门
Department department = departmentService.getById(departmentId);
user.setDepartment(department);
// >> 关联的岗位
List<Role> roleList = roleService.getByIds(roleIds);
user.setRoles(new HashSet<Role>(roleList));
// 3,更新到数据库
userService.update(user);
return "toList";
}
/** 初始化密码为“1234” */
public String initPassword() throws Exception {
// 1,从数据库中取出原对象
User user = userService.getById(model.getId());
// 2,设置要修改的属性(要使用MD5摘要)
String passwdMD5 = DigestUtils.md5Hex("1234");
user.setPassword(passwdMD5);
// 3,更新到数据库
userService.update(user);
return "toList";
}
// -------
public Long getDepartmentId() {
return departmentId;
}
public void setDepartmentId(Long departmentId) {
this.departmentId = departmentId;
}
public Long[] getRoleIds() {
return roleIds;
}
public void setRoleIds(Long[] roleIds) {
this.roleIds = roleIds;
}
}
<?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" />
<!-- 配置扩展名为action -->
<constant name="struts.action.extension" value="action" />
<!-- 配置主题 -->
<constant name="struts.ui.theme" value="simple" />
<package name="default" namespace="/" extends="struts-default">
<!-- 测试用的action,当与Spring整合后,class属性写的就是Spring中bean的名称 -->
<action name="test" class="testAction">
<result name="success">/test.jsp</result>
</action>
<!-- 岗位管理 -->
<action name="roleAction_*" class="roleAction" method="{1}">
<result name="list">/WEB-INF/jsp/roleAction/list.jsp</result>
<result name="addUI">/WEB-INF/jsp/roleAction/addUI.jsp</result>
<result name="editUI">/WEB-INF/jsp/roleAction/editUI.jsp</result>
<result name="toList" type="redirectAction">roleAction_list</result>
</action>
<!-- 部门管理 -->
<action name="departmentAction_*" class="departmentAction" method="{1}">
<result name="list">/WEB-INF/jsp/departmentAction/list.jsp</result>
<result name="saveUI">/WEB-INF/jsp/departmentAction/saveUI.jsp</result>
<result name="toList" type="redirectAction">departmentAction_list?parentId=${parentId}</result>
</action>
<strong><!-- 用户管理 -->
<action name="userAction_*" class="userAction" method="{1}">
<result name="list">/WEB-INF/jsp/userAction/list.jsp</result>
<result name="saveUI">/WEB-INF/jsp/userAction/saveUI.jsp</result>
<result name="toList" type="redirectAction">userAction_list</result>
</action></strong>
</package>
</struts>
package cn.itcast.oa.service;
import cn.itcast.oa.base.BaseDao;
import cn.itcast.oa.domain.User;
public interface UserService extends BaseDao<User> {
}
package cn.itcast.oa.service.impl;
import org.springframework.stereotype.Service;
import cn.itcast.oa.base.BaseDaoImpl;
import cn.itcast.oa.domain.User;
import cn.itcast.oa.service.UserService;
@Service
public class UserServiceImpl extends BaseDaoImpl<User> implements UserService{
}
package cn.itcast.oa.base;
import java.lang.reflect.ParameterizedType;
import java.util.Collections;
import java.util.List;
import javax.annotation.Resource;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.transaction.annotation.Transactional;
// @Transactional注解可以被继承,即对子类也有效
@Transactional
@SuppressWarnings("unchecked")
public abstract class BaseDaoImpl<T> implements BaseDao<T> {
@Resource
private SessionFactory sessionFactory;
protected Class<T> clazz; // 这是一个问题!
public BaseDaoImpl() {
// 通过反射得到T的真实类型
ParameterizedType pt = (ParameterizedType) this.getClass().getGenericSuperclass();
this.clazz = (Class) pt.getActualTypeArguments()[0];
System.out.println("clazz = " + clazz.getName());
}
public void save(T entity) {
getSession().save(entity);
}
public void update(T entity) {
getSession().update(entity);
}
public void delete(Long id) {
Object obj = getSession().get(clazz, id);
getSession().delete(obj);
}
public T getById(Long id) {
if (id == null) {
return null;
}
return (T) getSession().get(clazz, id);
}
public List<T> getByIds(Long[] ids) {
if (ids == null || ids.length == 0) {
return Collections.EMPTY_LIST;
}
return getSession().createQuery(//
"FROM " + clazz.getSimpleName() + " WHERE id IN(:ids)")//
.setParameterList("ids", ids)//
.list();
}
public List<T> findAll() {
return getSession().createQuery(//
"FROM " + clazz.getSimpleName())//
.list();
}
/**
* 获取当前可用的Session
*
* @return
*/
protected Session getSession() {
return sessionFactory.getCurrentSession();
}
}
package cn.itcast.oa.view.action;
import java.util.HashSet;
import java.util.List;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import cn.itcast.oa.base.BaseAction;
import cn.itcast.oa.domain.Department;
import cn.itcast.oa.domain.Role;
import cn.itcast.oa.domain.User;
import cn.itcast.oa.util.DepartmentUtils;
import com.opensymphony.xwork2.ActionContext;
@Controller
@Scope("prototype")
public class UserAction extends BaseAction<User> {
private Long departmentId;
private Long[] roleIds;
/** 列表 */
public String list() throws Exception {
List<User> userList = userService.findAll();
ActionContext.getContext().put("userList", userList);
return "list";
}
/** 删除 */
public String delete() throws Exception {
userService.delete(model.getId());
return "toList";
}
/** 添加页面 */
public String addUI() throws Exception {
// 准备数据:departmentList,显示为树状结构
List<Department> topList = departmentService.findTopList();
List<Department> departmentList = DepartmentUtils.getAllDepartments(topList);
ActionContext.getContext().put("departmentList", departmentList);
// 准备数据:roleList
List<Role> roleList = roleService.findAll();
ActionContext.getContext().put("roleList", roleList);
return "saveUI";
}
/** 添加 */
public String add() throws Exception {
// 1,新建对象并设置属性(也可以使用model)
Department department = departmentService.getById(departmentId);
model.setDepartment(department);
List<Role> roleList = roleService.getByIds(roleIds);
model.setRoles(new HashSet<Role>(roleList));
String passwdMD5 = DigestUtils.md5Hex("1234");
model.setPassword(passwdMD5); // 默认密码为1234,应使用MD5摘要
// 2,保存到数据库
userService.save(model);
return "toList";
}
/** 修改页面 */
public String editUI() throws Exception {
// 准备数据:departmentList,显示为树状结构
List<Department> topList = departmentService.findTopList();
List<Department> departmentList = DepartmentUtils.getAllDepartments(topList);
ActionContext.getContext().put("departmentList", departmentList);
// 准备数据:roleList
List<Role> roleList = roleService.findAll();
ActionContext.getContext().put("roleList", roleList);
// 准备回显的数据
User user = userService.getById(model.getId());
ActionContext.getContext().getValueStack().push(user);
if (user.getDepartment() != null) {
departmentId = user.getDepartment().getId();
}
if (user.getRoles().size() > 0) {
roleIds = new Long[user.getRoles().size()];
int index = 0;
for (Role role : user.getRoles()) {
roleIds[index++] = role.getId();
}
}
return "saveUI";
}
/** 修改 */
public String edit() throws Exception {
// 1,从数据库中取出原对象
User user = userService.getById(model.getId());
// 2,设置要修改的属性
// >> 普通属性
user.setLoginName(model.getLoginName());
user.setName(model.getName());
user.setGender(model.getGender());
user.setPhoneNumber(model.getPhoneNumber());
user.setEmail(model.getEmail());
user.setDescription(model.getDescription());
// >> 所属部门
Department department = departmentService.getById(departmentId);
user.setDepartment(department);
// >> 关联的岗位
List<Role> roleList = roleService.getByIds(roleIds);
user.setRoles(new HashSet<Role>(roleList));
// 3,更新到数据库
userService.update(user);
return "toList";
}
/** 初始化密码为“1234” */
public String initPassword() throws Exception {
// 1,从数据库中取出原对象
User user = userService.getById(model.getId());
// 2,设置要修改的属性(要使用MD5摘要)
String passwdMD5 = DigestUtils.md5Hex("1234");
user.setPassword(passwdMD5);
// 3,更新到数据库
userService.update(user);
return "toList";
}
// -------
public Long getDepartmentId() {
return departmentId;
}
public void setDepartmentId(Long departmentId) {
this.departmentId = departmentId;
}
public Long[] getRoleIds() {
return roleIds;
}
public void setRoleIds(Long[] roleIds) {
this.roleIds = roleIds;
}
}
添加ACTION方法,新增Service业务的方法,添加JSP方法,添加DAO方法。
原文地址:http://blog.csdn.net/zaq2995160/article/details/46273805