实现MySQL书架的后台操作流程

以下的文章主要说明的是MySQL书架的后台，其中主要包括的有其功能的具体描述，MySQL数据库的总体设计，MySQL数据库的实际操作，以下的文章就是对这些相关内容的主要描述。望你浏览之后会有所收获。 设计模式之迭代器 Iterator ，写了一个list类SortedArrayLi

以下的文章主要说明的是MySQL书架的后台，其中主要包括的有其功能的具体描述，MySQL数据库的总体设计，MySQL数据库的实际操作，以下的文章就是对这些相关内容的主要描述。望你浏览之后会有所收获。

设计模式之迭代器 Iterator ，写了一个list类SortedArrayList不知该叫什么名字，谁有在墙上挂一个MySQL书架的经验？

功能描述：

这只是项目中的小模块，项目中有几个栏目小说 期刊 综合，每个栏目都有书籍，在sns中，当登录用户，看到某本书的时候，可以点击放入我的书架，选择放入那个书架，每个书架可以放20本书，每个用户最多可以建10个书架。对放到书架上的书，可以在我的排序中自动拖动，而在其他的更新排序中按实际时间显示，用户不可以改变顺序，

数据库设计：

数据库主要用来保存放到MySQL书架中书籍的一些信息，封面 描述 地址 等，还有重要的 书架类别字段（用一个二维数组实现），每个书架有20个位置可以放书，可以设置一个字段，放书的时候是书的id ，没放书的就用0来表示，可以用一个二维数组，数组的key 用来放书架的类别，值用来放此类别中的信息，

数据库的操作：

数据库操作说明项目都是一样的CURL基本的操作，具体到本项目中，就是先添加，每个用户有一个默认数据，就是第一个数组，用户可以改变书架的名字就是数组的键值，对于每一个数组的操作，当加入此书架时，移动位置时 ，下架时，当向书架中添加书籍时还要判断此书架是否已经放满没有位置了，还有就是同一本书不能在一个书架中放入两次以上。

对于整个字段，就是在添加书架类别的时候，新建一个数组，初始里面的数组，就是初始一个空书架。当添加书架的时候判断书架是否以超过最大数目（可以在前面页面根据等级控制用户可以创建书架的个数）；create table bookshelf (uid int(11) ,shelf text);//创建书架表bookshelf

Sql代码

$arr = array('默认数据'=>'0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0');//插入默认书架的数据，一个数字，key 为书架名字，value为数据上的位置默认为空，
 

<ol class="dp-xml">
<li class="alt"><span><span>$</span><span class="attribute">text</span><span> = </span><span class="attribute-value">serialize</span><span>($arr);//序列化该数组   </span></span></li>
<li><span>insert into bookshelf (uid shelf) values( "$text" ,'$uid');//插入初始化数据   </span></li>
<li class="alt"><span>//添加书架，书架'shelf1' 名字要唯一   </span></li>
<li>
<span>$</span><span class="attribute">shelfs</span><span>=</span><span class="attribute-value">select</span><span> shelf from bookshelf where </span><span class="attribute">uid</span><span> = </span><span class="attribute-value">'$uid'</span><span>;//查询出uid 的书架   </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">a</span><span> = </span><span class="attribute-value">unserialize</span><span>($shelfs);//反序列化MySQL书架得到数组，   </span>
</li>
<li>
<span>for(int </span><span class="attribute">i</span><span>=</span><span class="attribute-value">0</span><span>;i</span><span class="tag"><span class="tag-name">count</span><span>($a);i++){//判断此书架是否存在   </span></span>
</li>
<li class="alt"><span>if($(a)[0]==shelf1){   </span></li>
<li><span>return "此书架以存在";   </span></li>
<li class="alt"><span>}   </span></li>
<li><span>return true;   </span></li>
<li class="alt"><span>}   </span></li>
<li>
<span>$</span><span class="attribute">p</span><span> = </span><span class="attribute-value">array</span><span>('shelf1'=</span><span class="tag">></span><span>'0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0');   </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">p</span><span> = </span><span class="attribute-value">serialize</span><span>($p);//插入新书架   </span>
</li>
<li>
<span>insert into bookshelf shelf values ('$p') where </span><span class="attribute">uid</span><span> = </span><span class="attribute-value">'$uid'</span><span>;   </span>
</li>
<li class="alt"><span>//添加书籍 book1 'bid1'到书架shelf1   </span></li>
<li>
<span>$</span><span class="attribute">shelfs1</span><span> = </span><span class="attribute-value">select</span><span> shelf from bookshelf where </span><span class="attribute">uid</span><span> = </span><span class="attribute-value">'$uid'</span><span>;//   </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">b</span><span> = </span><span class="attribute-value">unserialize</span><span>($shelfs1);//   </span>
</li>
<li>
<span>for(int </span><span class="attribute">i</span><span>=</span><span class="attribute-value">0</span><span>;i</span><span class="tag"><span class="tag-name">count</span><span>($b);i++){   </span></span>
</li>
<li class="alt"><span>if($b[i][0]=='$shelf1'){//得到要插入的MySQL书架   </span></li>
<li>
<span>$</span><span class="attribute">pk</span><span> = </span><span class="attribute-value">explode</span><span>('-','$b[i][1]);   </span>
</li>
<li class="alt">
<span>for(int </span><span class="attribute">num</span><span>=</span><span class="attribute-value">1</span><span>;num</span><span class="tag"><span class="tag-name">count</span><span>($pk[1]);num++){;/书架是否放满   </span></span>
</li>
<li><span>if($pk[1][i]==0){   </span></li>
<li class="alt">
<span>for(int </span><span class="attribute">k</span><span>=</span><span class="attribute-value">1</span><span>;k</span><span class="tag"><span class="tag-name">count</span><span>($pk);k++){//判断书架中是否有要插入的书   </span></span>
</li>
<li><span>if($pk[i][1]=='$bid1'){   </span></li>
<li class="alt"><span>return '此书架已有此时';   </span></li>
<li><span>}else{//书架中没有此书可以插入 默认插入到后面   </span></li>
<li class="alt"><span>if($pk[i][1]==0){   </span></li>
<li><span>$pk[i][1]==$bid1;//插入数组   </span></li>
<li class="alt"><span>return implode("-",$pk[i]);//返回字符串   </span></li>
<li><span>}   </span></li>
<li class="alt"><span>}else   </span></li>
<li><span>return "此书架以放满";   </span></li>
<li class="alt"><span>}   </span></li>
<li><span>//读取书架 用于在加入书架时显示的列表 书籍数量 存入一个数组中   </span></li>
<li class="alt">
<span>$</span><span class="attribute">arr</span><span> = </span><span class="attribute-value">new</span><span> array();   </span>
</li>
<li>
<span>$</span><span class="attribute">shlefs</span><span> = </span><span class="attribute-value">select</span><span> shelf from bookshelf where </span><span class="attribute">uid</span><span> =</span><span class="attribute-value">'$uid'</span><span>;//   </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">ss</span><span> = </span><span class="attribute-value">unsersize</span><span>($shelfs);//反序列化MySQL书架信息   </span>
</li>
<li>
<span>for(int </span><span class="attribute">nn</span><span>=</span><span class="attribute-value">1</span><span>;nn</span><span class="tag"><span class="tag-name">count</span><span>($ss);nn++){//把书架名字做key   </span></span>
</li>
<li class="alt">
<span>$</span><span class="attribute">key</span><span> =$ss[i][0];   </span>
</li>
<li>
<span>$</span><span class="attribute">value</span><span>=</span><span class="attribute-value">0</span><span>;   </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">n</span><span> = </span><span class="attribute-value">explode</span><span>("-",$ss[i][1]);   </span>
</li>
<li>
<span>for(int </span><span class="attribute">mm</span><span>=</span><span class="attribute-value">1</span><span>;mm</span><span class="tag"><span class="tag-name">count</span><span>($n);mm++){//得到此书架中的书数量   </span></span>
</li>
<li class="alt"><span>if($n[1] !=0){   </span></li>
<li><span>$value++;   </span></li>
<li class="alt"><span>}   </span></li>
<li><span>$arr[0]=$key;   </span></li>
<li class="alt"><span>$arr[1]=$value;   </span></li>
<li><span>}   </span></li>
<li class="alt"><span>//移动书籍 把bid2 从5位置移动到8位置   </span></li>
<li>
<span>$</span><span class="attribute">startpos</span><span> = </span><span class="attribute-value">2</span><span>;   </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">endpos</span><span> = </span><span class="attribute-value">8</span><span>;   </span>
</li>
<li>
<span>if($startpos</span><span class="tag"><span class="tag-name">0</span><span> || $startpos</span><span class="tag">></span><span>20 || $endpos</span><span class="tag"><span class="tag-name">0</span><span> || $endpos</span><span class="tag">></span><span>20 || $</span><span class="attribute">startpos</span><span>==$endpos)exit;   </span></span></span>
</li>
<li class="alt">
<span>$</span><span class="attribute">shelf</span><span> = $_db-</span><span class="tag">></span><span>fetch_first("select * from `sns_shelf` where `uid`={$uid}");   </span>
</li>
<li>
<span>$shelf select shelf from bookshelf wher </span><span class="attribute">uid</span><span> =</span><span class="attribute-value">'$uid'</span><span>;   </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">shelfs</span><span>=</span><span class="attribute-value">unserisize</span><span>($shelf);//   </span>
</li>
<li><span>feach($shelfs as $key ,$value){   </span></li>
<li class="alt">
<span>$</span><span class="attribute">array</span><span> = </span><span class="attribute-value">explode</span><span>("-",$value);   </span>
</li>
<li><span>if($array[1] == 'bid2'){找到bid2所在的MySQL书架   </span></li>
<li class="alt"><span>if($sarry[1][$startpos]==0)exit;//如果开始位置没有书不交换   </span></li>
<li>
<span>$</span><span class="attribute">temp</span><span> = $sarry[1][$endpos];//交换位置   </span>
</li>
<li class="alt"><span>$sarry[1][$endpos]=$sarry[1][$startpos];   </span></li>
<li><span>$sarry[1][$startpos]=$temp;   </span></li>
<li class="alt">
<span>$</span><span class="attribute">val</span><span> = </span><span class="attribute-value">implode</span><span>("-",$value[1]);   </span>
</li>
<li><span>$shelfs[1] = $val;   </span></li>
<li class="alt"><span>serialize($shelfsl);//序列化shelf   </span></li>
<li>
<span>update bookshelf set </span><span class="attribute">shelf</span><span> = </span><span class="attribute-value">shelfs</span><span> where </span><span class="attribute">uid</span><span> = </span><span class="attribute-value">'$uid'</span><span>;  </span>
</li>
<li class="alt"><span>更新   </span></li>
<li><span>}   </span></li>
<li class="alt"><span>}   </span></li>
</ol>

下架书籍