⭐基于bootstap-Jquery-JSP-Servlet-mysql⭐博客项目——后台资源管理demo1
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前面完成了后台的用户管理，而资源管理的实现的原理和用户管理是差不多的，资源管理又分为用户资源管理和资源类别管理，这一篇主要介绍用户资源管理的实现
表的设计
资源管理需要两个表，一个是管理用户资源的表resource,另一个是管理资源类别的表category
显然，管理用户资源的表需要两个外键，其中一个外键resource_uid对应用户账号user_id,另一个对应资源类别category_id
这样当删除用户时，用户所拥有的资源也会被删除，同理，当删除资源类别时，属于这种资源类别的用户资源也会被删除
管理用户资源表resource如下
| 字段名称 | 类型 | 约束 | 描述 |
|---|---|---|---|
| resource_id | int(10) | NOT NULL AUTO_INCREMENT | 资源编号 |
| resource_cid | int(10) | NOT NULL FOREIGN KEY (resource_cid) REFERENCES category (category_id) ON DELETE CASCADE ON UPDATE CASCADE | 外键对应资源类别编号category |
| resource_uid | varchar(20) | NOT NULL FOREIGN KEY (resource_uid) REFERENCES user (user_id) ON DELETE CASCADE ON UPDATE CASCADE | 外键对应用户账号user_id |
| resource_name | varchar(20) | NOT NULL | 资源名称 |
| resource_image | varchar(500) | DEFAULT NULL | 图片路径 |
| resource_url | varchar(250) | NOT NULL | 资源下载地址路径 |
| resource_desc | varchar(250) | DEFAULT NULL | 资源描述 |
| resource_level | varchar(10) | NOT NULL DEFAULT ‘初级’ | 资源等级,默认为初级 |
| resource_time | datetime | NOT NULL | 资源上传时间 |
| resource_good | int(10) | NOT NULL DEFAULT ‘0’ | 是否为优秀资源，默认为一般资源 |
资源类别表category如下
| 字段名称 | 类型 | 约束 | 描述 |
|---|---|---|---|
| category_id | int(10) | NOT NULL AUTO_INCREMENT | 资源类别编号 |
| category_name | varchar(20) | NOT NULL | 资源类别名称 |
| category_desc | varchar(250) | DEFAULT NULL | 资源类别描述 |
表的创建
resource表的创建
在mysql命令行使用如下sql语句创建resource表
USE web_resource;
DROP TABLE IF EXISTS `resource`;
CREATE TABLE `resource` (
`resource_id` int(10) NOT NULL AUTO_INCREMENT,
`resource_cid` int(10) NOT NULL,
`resource_uid` varchar(20) NOT NULL,
`resource_name` varchar(20) NOT NULL,
`resource_image` varchar(500) DEFAULT NULL,
`resource_url` varchar(250) NOT NULL,
`resource_desc` varchar(250) DEFAULT NULL,
`resource_level` varchar(10) NOT NULL DEFAULT '初级',
`resource_time` datetime NOT NULL,
`resource_good` int(10) NOT NULL DEFAULT '0',
PRIMARY KEY (`resource_id`),
KEY `resource_cid` (`resource_cid`),
KEY `resource_uid` (`resource_uid`),
CONSTRAINT `resource_ibfk_1` FOREIGN KEY (`resource_cid`) REFERENCES `category` (`category_id`) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT `resource_ibfk_2` FOREIGN KEY (`resource_uid`) REFERENCES `user` (`user_id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8;
category表的创建
在mysql命令行使用如下sql语句创建category表
USE web_resource;
DROP TABLE IF EXISTS `category`;
CREATE TABLE `category` (
`category_id` int(10) NOT NULL AUTO_INCREMENT,
`category_name` varchar(20) NOT NULL,
`category_desc` varchar(250) DEFAULT NULL,
PRIMARY KEY (`category_id`,`category_name`),
KEY `category_id` (`category_id`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8;
创建实体类
在entity包下，创建用户资源实体resource,如下
package com.zhuo.entity;
public class Resource
private int resourceId;
private int resourceCid;
private String resourceUid;
private String resourceName;
private String resourceImage;
private String resourceUrl;
private String resourceDesc;
private String resourceLevel;
private String resourceTime;
private int resourceGood;
public Resource()
super();
public Resource(int resourceId, int resourceCid, String resourceUid, String resourceName, String resourceImage,
String resourceUrl, String resourceDesc, String resourceLevel, String resourceTime, int resourceGood)
super();
this.resourceId = resourceId;
this.resourceCid = resourceCid;
this.resourceUid = resourceUid;
this.resourceName = resourceName;
this.resourceImage = resourceImage;
this.resourceUrl = resourceUrl;
this.resourceDesc = resourceDesc;
this.resourceLevel = resourceLevel;
this.resourceTime = resourceTime;
this.resourceGood = resourceGood;
public int getResourceId()
return resourceId;
public void setResourceId(int resourceId)
this.resourceId = resourceId;
public int getResourceCid()
return resourceCid;
public void setResourceCid(int resourceCid)
this.resourceCid = resourceCid;
public String getResourceUid()
return resourceUid;
public void setResourceUid(String resourceUid)
this.resourceUid = resourceUid;
public String getResourceName()
return resourceName;
public void setResourceName(String resourceName)
this.resourceName = resourceName;
public String getResourceImage()
return resourceImage;
public void setResourceImage(String resourceImage)
this.resourceImage = resourceImage;
public String getResourceUrl()
return resourceUrl;
public void setResourceUrl(String resourceUrl)
this.resourceUrl = resourceUrl;
public String getResourceDesc()
return resourceDesc;
public void setResourceDesc(String resourceDesc)
this.resourceDesc = resourceDesc;
public String getResourceLevel()
return resourceLevel;
public void setResourceLevel(String resourceLevel)
this.resourceLevel = resourceLevel;
public String getResourceTime()
return resourceTime;
public void setResourceTime(String resourceTime)
this.resourceTime = resourceTime;
public int getResourceGood()
return resourceGood;
public void setResourceGood(int resourceGood)
this.resourceGood = resourceGood;
@Override
public String toString()
return "Resource [resourceId=" + resourceId + ", resourceCid=" + resourceCid + ", resourceUid=" + resourceUid
+ ", resourceName=" + resourceName + ", resourceImage=" + resourceImage + ", resourceUrl=" + resourceUrl
+ ", resourceDesc=" + resourceDesc + ", resourceLevel=" + resourceLevel + ", resourceTime="
+ resourceTime + ", resourceGood=" + resourceGood + "]";
在entity包下，创建资源类别实体category，如下
package com.zhuo.entity;
public class Category
private int categoryId;
private String categoryName;
private String categoryDesc;
public Category()
super();
public Category(int categoryId, String categoryName, String categoryDesc)
super();
this.categoryId = categoryId;
this.categoryName = categoryName;
this.categoryDesc = categoryDesc;
public int getCategoryId()
return categoryId;
public void setCategoryId(int categoryId)
this.categoryId = categoryId;
public String getCategoryName()
return categoryName;
public void setCategoryName(String categoryName)
this.categoryName = categoryName;
public String getCategoryDesc()
return categoryDesc;
public void setCategoryDesc(String categoryDesc)
this.categoryDesc = categoryDesc;
@Override
public String toString()
return "Category [categoryId=" + categoryId + ", categoryName=" + categoryName + ", categoryDesc="
+ categoryDesc + "]";
资源管理实现
用户资源管理
获取所有用户资源信息并分页
在controller中创建resource包，并在resource包下创建DoResourceSelect.java，代码如下
@WebServlet("/manage/admin_do_resource_select")
public class DoResourceSelect extends HttpServlet
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
// 当前页
int currentPage = 1;
// 每页显示条数
int count = 5;
// array[0]=资源总数，array[1]=总页数，后面会被覆盖
int array[] = 0, 0 ;
// 获取用户指定的页面
String cp = request.getParameter("currentPage");
// 接收用户搜索的关键字
String keyword = request.getParameter("keywords");
/* 用户如果有指定当前页，则把字符串转化为int型 */
if (cp != null)
currentPage = Integer.parseInt(cp);
// 创建资源service层接口的实现类
ResourceServiceImpl resourceServiceImpl = new ResourceServiceImpl();
/*
* 调用业务逻辑方法获取资源记录总数并算出总页数 即(array[0]=资源总数，array[1]=总页数(资源总数/每页显示条数)
*/
try
array = resourceServiceImpl.getResourcePageTotal(count, keyword);
catch (SQLException e)
e.printStackTrace();
// 调用业务逻辑方法获取所有资源信息
ArrayList<Resource> listResource = null;
try
listResource = resourceServiceImpl.getAllResource(currentPage, count, keyword);
catch (SQLException e)
e.printStackTrace();
/*
* 遍历所有资源，遍历过程中利用资源id 调用业务逻辑方法获取资源用户信息，并添加到list集合中
*/
ArrayList<User> listUser = new ArrayList<User>();
for (int i = 0; i < listResource.size(); i++)
User user = new User();
try
user = resourceServiceImpl.getResourceUser(listResource.get(i).getResourceUid());
catch (SQLException e)
e.printStackTrace();
listUser.add(user);
/*
* 遍历所有资源，遍历过程中利用资源id 调用业务逻辑方法获取资源类别信息，并添加到list集合中
*/
ArrayList<Category> listCategory = new ArrayList<Category>();
for (int i = 0; i < listResource.size(); i++)
Category category = new Category();
try
category = resourceServiceImpl.getResourceCategory(listResource.get(i).getResourceCid());
catch (SQLException e)
e.printStackTrace();
listCategory.add(category);
// 放到请求对象域里
request.setAttribute("resourceList", listResource);
request.setAttribute("userList", listUser);
request.setAttribute("categoryList", listCategory);
request.setAttribute("totalStudent", array[0]);
request.setAttribute("totalPage", array[1]);
request.setAttribute("currentPage", currentPage);
/* 若用户是通过搜索的，把关键词放在请求域中 */
if (keyword != null)
request.setAttribute("searchParams", "&keywords=" + keyword);
// 请求转发到资源管理页面
request.getRequestDispatcher("/WEB-INF/manage/admin_resource.jsp").forward(request, response);
在service层中创建ResourceService接口，并在接口中添加如下业务逻辑抽象方法，如下
// 获取所有资源记录总数及页数
public int[] getResourcePageTotal(int count, String keyword) throws SQLException;
// 获取所有资源信息
public ArrayList<Resource> getAllResource(int currentPage, int count, String keyword) throws SQLException;
// 获取资源的用户信息
public User getResourceUser(String resourceUid) throws SQLException;
// 获取资源的类别信息
public Category getResourceCategory(int categoryId) throws SQLException;
在service层中创建接口的实现类ResourceServiceImpl.java，并在实现类中重写接口方法，如下
/* 创建资源dao层接口的实现类,并赋给接口对象变量
* 实现上转型，也就面向接口编程，而不关心它的实现类是谁 */
ResourceDao resourceDao = new ResourceDaoImpl();
/*
* 创建用户dao层接口的实现类,并赋给接口对象变量。
* 实现上转型，也就面向接口编程，而不关心它的实现类是谁
*/
UserDao userDao = new UserDaoImpl();
@Override
public int[] getResourcePageTotal(int count, String keyword) throws SQLException
// 检索所有资源总数并算出总页数
int[] array = resourceDao.selectResourceTotal(count, keyword);
return array;
@Override
public ArrayList<Resource> getAllResource(int currentPage, int count, String keyword) throws SQLException
// 检索所有资源信息
ArrayList<Resource> listResource = resourceDao.selectAllResource(currentPage, count, keyword);
return listResource;
@Override
public User getResourceUser(String resourceUid) throws SQLException
// 检索用户信息
User user = userDao.selectUser(resourceUid, "");
return user;
@Override
public Category getResourceCategory(int catagotyId) throws SQLException
// 检索资源的资源类别
Category category = resourceDao.selectResourceCategory(catagotyId);
return category;
这里需要说一下获取资源用户信息的业务功能，它调用了检索用户信息dao层方法。
在前面的用户管理中已经在dao层的UserDao编写了检索用户的方法，在这里就可以直接用了，而不需要重复在dao层的ResourceDao编写检索用户信息的方法了
但是呢，UserDaoImpl是需要一个身份标识的参数的，这里只需传入空值
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