论坛模块_版块管理_增删改查&实现上下移动

论坛模块_版块管理1_增删改查

设计实体Forum.java

public class Forum {

    private Long id;

    private String name;

    private String Description;

    private int position;    //排序用的位置号

    public Long getId() {

        return id;

    }

    public void setId(Long id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getDescription() {

        return Description;

    }

    public void setDescription(String description) {

        Description = description;

    }

    public int getPosition() {

        return position;

    }

    public void setPosition(int position) {

        this.position = position;

    }

}

映射文件Forum.hbm.xml

<hibernate-mapping package="cn.itcast.oa.domain">

    <class name="Forum" table="itcast_forum">

        <id name="id">

            <generator class="native" />

        </id>

        <property name="name"></property>

        <property name="description"></property>

        <property name="position"></property>

    </class>

</hibernate-mapping>

加到hibernate.hbm.xml中

建表

运行testSessionFactory测试方法

分析功能，实现功能

增删改查6个请求，上移下移2个请求

ForumManageAction.java

@Controller

@Scope("prototype")

public class ForumManageAction extends BaseAction<Forum>{

    /** 列表 */

    public String list() throws Exception {

        return "list";

    }

    /** 删除 */

    public String delete() throws Exception {

        return "toList";

    }

    /** 添加页面 */

    public String addUI() throws Exception {

        return "saveUI";

    }

    /** 添加 */

    public String add() throws Exception {

        return "toList";

    }

    /** 修改页面 */

    public String editUI() throws Exception {

        return "saveUI";

    }

    /** 修改 */

    public String edit() throws Exception {

        return "toList";

    }

    /** 上移 */

    public String moveUp() throws Exception {

        return "toList";

    }

    /** 下移 */

    public String moveDown() throws Exception {

        return "toList";

    }

}

创建所用到的页面

2个，新建，列表

配置

在ForumAction类上标注

struts.xml

<!-- 论坛：版块管理 -->

        <action name="forumManage_*" class="forumManageAction" method="{1}">

            <result name="list">/WEB-INF/jsp/forumManageAction/list.jsp</result>

            <result name="saveUI">/WEB-INF/jsp/forumManageAction/saveUI.jsp</result>

            <result name="toList" type="redirectAction">forumManage_list</result>

        </action>

准备service及实现类

ForumService.java

public interface ForumService extends DaoSupport<Forum>{

}

ForumServiceImpl.java

@Service

@Transactional

public class ForumServiceImpl extends DaoSupportImpl<Forum> implements ForumService{

}

在BaseAction.java中声明

　　@Resource

　　protected ForumService forumService;

填空实现ForumManageAction里面的功能

@Controller

@Scope("prototype")

public class ForumManageAction extends BaseAction<Forum>{

    /** 列表 */

    public String list() throws Exception {

        List<Forum> forumList = forumService.findAll();

        ActionContext.getContext().put("forumList", forumList);

        return "list";

    }

    /** 删除 */

    public String delete() throws Exception {

        forumService.delete(model.getId());

        return "toList";

    }

    /** 添加页面 */

    public String addUI() throws Exception {

        return "saveUI";

    }

    /** 添加 */

    public String add() throws Exception {

        forumService.save(model);

        return "toList";

    }

    /** 修改页面 */

    public String editUI() throws Exception {

        //准备回显的页面

        Forum forum = forumService.getById(model.getId());

        ActionContext.getContext().getValueStack().push(forum);//放在栈顶

        return "saveUI";

    }

    /** 修改 */

    public String edit() throws Exception {

        //从数据库中取出原对象

        Forum forum = forumService.getById(model.getId());

        //设置要修改的属性

        forum.setName(model.getName());

        forum.setDescription(model.getDescription());

        //更新到数据库

        forumService.update(forum);

        return "toList";

    }

    /** 上移 */

    public String moveUp() throws Exception {

        forumService.moveUp(model.getId());

        return "toList";

    }

    /** 下移 */

    public String moveDown() throws Exception {

        forumService.moveDown(model.getId());

        return "toList";

    }

}

新增的两个方法在ForumService接口中声明

public interface ForumService extends DaoSupport<Forum>{

    //上移，最上面的不能上移了

    void moveUp(Long id);

    //下移，最下面的不能下移了

    void moveDown(Long id);

}

ForumServileImpl类中对两个方法进行实现，具体怎么实现下面在做

@Service

@Transactional

public class ForumServiceImpl extends DaoSupportImpl<Forum> implements ForumService{

    public void moveUp(Long id) {

    }

    public void moveDown(Long id) {

    }

}

写页面

第一拷贝源代码

第二include

第三替换路径

第四改具体内容

list.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<html>

<head>

    <title>版块列表</title>

    <%@ include file="/WEB-INF/jsp/public/commons.jspf" %>

</head>

<body>

<div id="Title_bar">

    <div id="Title_bar_Head">

        <div id="Title_Head"></div>

        <div id="Title"><!--页面标题-->

            <img border="0" width="13" height="13" src="${pageContext.request.contextPath}/style/images/title_arrow.gif"/> 版块管理

        </div>

        <div id="Title_End"></div>

    </div>

</div>

<div id="MainArea">

    <table cellspacing="0" cellpadding="0" class="TableStyle">

        <!-- 表头-->

        <thead>

            <tr align="CENTER" valign="MIDDLE" id="TableTitle">

                <td width="250px">版块名称</td>

                <td width="300px">版块说明</td>

                <td>相关操作</td>

            </tr>

        </thead>

        <!--显示数据列表-->

        <tbody id="TableData" class="dataContainer" datakey="forumList">

        <s:iterator value="#forumList">

            <tr class="TableDetail1 template">

                <td>${name}&nbsp;</td>

                <td>${description}&nbsp;</td>

                <td>

                    <s:a action="forumManage_delete?id=%{id}" onclick="return delConfirm()">删除</s:a>

                    <s:a action="forumManage_editUI?id=%{id}" >修改</s:a>

                    <s:a action="forumManage_moveUp?id=%{id}" >上移</s:a>

                    <s:a action="forumManage_moveDown?id=%{id}" >下移</s:a>

                </td>

            </tr>

        </s:iterator>

        </tbody>

    </table>

    <!-- 其他功能超链接 -->

    <div id="TableTail">

        <div id="TableTail_inside">

            <s:a action="forumManage_addUI"><img src="${pageContext.request.contextPath}/style/images/createNew.png" /></s:a>

        </div>

    </div>

</div>

<div class="Description">

    说明：<br />

    1，显示的列表按其sortOrder值升序排列。<br />

    2，可以通过上移与下移功能调整顺序。最上面的不能上移，最下面的不能下移。<br />

</div>

</body>

</html>

saveUI.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<html>

<head>

    <title>版块设置</title>

    <%@ include file="/WEB-INF/jsp/public/commons.jspf" %>

</head>

<body>

<!-- 标题显示 -->

<div id="Title_bar">

    <div id="Title_bar_Head">

        <div id="Title_Head"></div>

        <div id="Title"><!--页面标题-->

            <img border="0" width="13" height="13" src="${pageContext.request.contextPath}/style/images/title_arrow.gif"/> 版块设置

        </div>

        <div id="Title_End"></div>

    </div>

</div>

<!--显示表单内容-->

<div id="MainArea">

    <s:form action="forumManage_%{id == null ? 'add' : 'edit'}">

    <s:hidden name="id"></s:hidden>

        <div class="ItemBlock_Title1"><!-- 信息说明<DIV CLASS="ItemBlock_Title1">

            <IMG BORDER="0" WIDTH="4" HEIGHT="7" SRC="${pageContext.request.contextPath}/style/blue/images/item_point.gif" /> 版块信息 </DIV>  -->

        </div>

        <!-- 表单内容显示 -->

        <div class="ItemBlockBorder">

            <div class="ItemBlock">

                <table cellpadding="0" cellspacing="0" class="mainForm">

                    <tr>

                        <td width="100">版块名称</td>

                        <td><s:textfield name="name" cssClass="InputStyle" /> *</td>

                    </tr>

                    <tr>

                        <td>版块说明</td>

                        <td><s:textarea name="description" cssClass="TextareaStyle"></s:textarea></td>

                    </tr>

                </table>

            </div>

        </div>

        <!-- 表单操作 -->

        <div id="InputDetailBar">

            <input type="image" src="${pageContext.request.contextPath}/style/images/save.png"/>

            <a href="javascript:history.go(-1);"><img src="${pageContext.request.contextPath}/style/images/goBack.png"/></a>

        </div>

    </s:form>

</div>

<div class="Description">

    说明：<br />

    1，新添加的版块默认显示在最下面。<br />

</div>

</body>

</html>

测试

访问http://localhost:8080/ItcastOA/登录

论坛模块_版块管理2_实现上下移动1

之前设计实体时设计了一个position字段

1，查询时要按position的值排序。

2，添加时要指定position的值，要唯一。

3，上下移动就是与上面或下面的那个Forum交换position的值。

SELECT * FROM itcast_forum order by position;

select * from itcast_forum where position=(//查询位置2的信息

select max(position) from itcast_forum where position<3//找到小于位置3的最大那个位置，也就是2

);

select * from itcast_forum where position<7 order by position desc limit 0,1;

对应写法

Forum other = (Forum) getSession().createQuery(//我上面那个Forum

                "FROM Forum f WHERE f.position<? ORDER BY f.position DESC")//

                .setParameter(0, forum.getPosition())//

                .setFirstResult(0)//

                .setMaxResults(1)//

                .uniqueResult();

ForumServiceImpl.java

@Service

@Transactional

@SuppressWarnings("unchecked")

public class ForumServiceImpl extends DaoSupportImpl<Forum> implements ForumService{

    @Override

    //查询是给它加上排序功能

    public List<Forum> findAll() {

        return getSession().createQuery(//

                "FROM Forum f ORDER BY f.position")//

                .list();

    }

    @Override

    public void save(Forum forum) {

        //保存

        super.save(forum);

        //设置position的值

        forum.setPosition(forum.getId().intValue());//转为int型

    }

    //上移和下移都是通过改变position的值实现的

    public void moveUp(Long id) {

        //找出相关的Forum

        Forum forum = getById(id);//当前要移动的Forum

        Forum other = (Forum) getSession().createQuery(//我上面那个Forum

                "FROM Forum f WHERE f.position<? ORDER BY f.position DESC")//

                .setParameter(0, forum.getPosition())//

                .setFirstResult(0)//

                .setMaxResults(1)//

                .uniqueResult();

        //最上面的不能上移

        if(other == null) {

            return;

        }

        //交换posution的值

        int temp = forum.getPosition();

        forum.setPosition(other.getPosition());

        other.setPosition(temp);

        //更新到数据库中，可以不写，因为对象现在是持久化状态

        getSession().update(forum);

        getSession().update(other);

    }

    public void moveDown(Long id) {

        //找出相关的Forum

        Forum forum = getById(id);//当前要移动的Forum

        Forum other = (Forum) getSession().createQuery(//我下面那个Forum

                "FROM Forum f WHERE f.position>? ORDER BY f.position ASC")//

                .setParameter(0, forum.getPosition())//

                .setFirstResult(0)//

                .setMaxResults(1)//

                .uniqueResult();

        //最下面的不能上移

        if(other == null) {

            return;

        }

        //交换posution的值

        int temp = forum.getPosition();

        forum.setPosition(other.getPosition());

        other.setPosition(temp);

        //更新到数据库中，可以不写，因为对象现在是持久化状态

        getSession().update(forum);

        getSession().update(other);

    }

}

最上面上移和最下面下移变灰色不能点

list.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<html>

<head>

    <title>版块列表</title>

    <%@ include file="/WEB-INF/jsp/public/commons.jspf" %>

    <style type="text/css">

        .disabled{

            color:gray;

            cursor:pointer;

        }

    </style>

</head>

<body>

<div id="Title_bar">

    <div id="Title_bar_Head">

        <div id="Title_Head"></div>

        <div id="Title"><!--页面标题-->

            <img border="0" width="13" height="13" src="${pageContext.request.contextPath}/style/images/title_arrow.gif"/> 版块管理

        </div>

        <div id="Title_End"></div>

    </div>

</div>

<div id="MainArea">

    <table cellspacing="0" cellpadding="0" class="TableStyle">

        <!-- 表头-->

        <thead>

            <tr align="CENTER" valign="MIDDLE" id="TableTitle">

                <td width="250px">版块名称</td>

                <td width="300px">版块说明</td>

                <td>相关操作</td>

            </tr>

        </thead>

        <!--显示数据列表-->

        <tbody id="TableData" class="dataContainer" datakey="forumList">

        <s:iterator value="#forumList" status="status">

            <tr class="TableDetail1 template">

                <td>${name}&nbsp;</td>

                <td>${description}&nbsp;</td>

                <td>

                    <s:a action="forumManage_delete?id=%{id}" onclick="return delConfirm()">删除</s:a>

                    <s:a action="forumManage_editUI?id=%{id}" >修改</s:a>

                    <!-- 最上面的不能上移 -->

                    <s:if test="#status.first">

                        <span class="disabled"></span>

                    </s:if>

                    <s:else>

                        <s:a action="forumManage_moveUp?id=%{id}" >上移</s:a>

                    </s:else>

                    <!-- 最下面的不能下移 -->

                    <s:if test="#status.last">

                        <span class="disable"></span>

                    </s:if>

                    <s:else>

                        <s:a action="forumManage_moveDown?id=%{id}" >下移</s:a>

                    </s:else>

                </td>

            </tr>

        </s:iterator>

        </tbody>

    </table>

    <!-- 其他功能超链接 -->

    <div id="TableTail">

        <div id="TableTail_inside">

            <s:a action="forumManage_addUI"><img src="${pageContext.request.contextPath}/style/images/createNew.png" /></s:a>

        </div>

    </div>

</div>

<div class="Description">

    说明：<br />

    1，显示的列表按其sortOrder值升序排列。<br />

    2，可以通过上移与下移功能调整顺序。最上面的不能上移，最下面的不能下移。<br />

</div>

</body>

</html>