displaytag如何实现获取到每行的id字段的值。

1、displaytag如何实现获取到每行的id字段的值。

　　使用封装好的框架，有时候，对于一个知识点不熟悉，可能会浪费你大把的时间，我使用displaytag主要是使用它的分页技术，但是客户提出的需求，是获取到每行的id，然后选择一个用户名称（用户id），将他们关联操作，其实业务很简单，但是获取到你想要的这一行，一开始确实难为着我了，后来才发现，很简单。

代码如下所示：

 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
 <%@ taglib prefix="display" uri="http://displaytag.sf.net"%>
 <%
     //获取绝对路径路径
     String path = request.getContextPath();
     String basePath = request.getScheme() + "://"
                 + request.getServerName() + ":" + request.getServerPort()
                 + path + "/";
 %>
 <!DOCTYPE html>
 <html>
 <head>
 <base href="<%=basePath %>" />
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
 <title>图书管理-图书查询</title>
 <link href="resource/css/bootstrap.min.css" rel="stylesheet" />
 <link rel="stylesheet" href="resource/table/bootstrap-table.min.css">
 <link type="text/css" rel="stylesheet" href="resource/select2/css/select2.min.css">
 <script type="text/javascript" src="resource/js/jquery.min.js"></script>
 <script type="text/javascript" src="resource/js/bootstrap.min.js"></script>
 <script src="resource/table/bootstrap-table.min.js"></script>
 <script type="text/javascript" src="resource/select2/js/select2.js"></script>

 <style type="text/css">

 tr th{text-align:center;}
 tr td{text-align:center;}
 </style>
 <script type="text/javascript">
     $(document).ready(function(){
         $("#clickIt").click(function(){
             alert("sorry,此类图书数量为0,不可借阅......");
         });
     });

     //启动之前，先查询出地方前置库信息，然后将地方前置库的信息传递到实例数据表中
     $(function(){
         var url = "system/book/userAjax";
         $.ajax({
             type : 'POST',
             url : url,
             dataType : 'json',
             //traditional : true,
             //async : false,
             success : function(data) {
                 //console.log(data.list);
                 var result = data.list;
                 for(var i=;i<result.length;i++){
                     //console.log(result[i].userAccount);
                     $("#userNameCategory").append("<option value='"+ result[i].userId +"'>" + result[i].userAccount + "</option>");
                 }
             }
         })
     });

     function borrowBooksFunction(bookIds){
         //关键点在于获取到图书的编号
         console.log(bookIds);
         //关键点，管理员通过借阅这本书给学生，将这本书的bookId给某个学生
         $("#setBookId").val(bookIds);
     }

 </script>
 </head>
 <body>
     <div>
         <ul class="breadcrumb" style="margin: 0px;">
             <li>系统管理</li>
             <li>图书管理</li>
             <li>图书查询</li>
         </ul>
     </div>
     <form action="${basePath }system/book/select" method="post" class="form-inline">
         <div class="row alert alert-info" style="margin: 0px; padding: 5px;">
             <div class="form-group">
                 <label>条件:</label>
                 <select name="condition" class="form-control">
                     <option value="bookName" ${condition == 'bookName'?'selected':'' }>图书名称</option>
                     <option value="bookAuthor" ${condition == 'bookAuthor'?'selected':'' }>图书作者</option>
                     <option value="bookType" ${condition == 'bookType'?'selected':'' }>图书类别</option>
                 </select>
                 <input type="text" name="content" value="${result }" class="form-control" placeholder="请输入查询条件" />
             </div>
             <input type="submit" class="btn btn-danger" value="查询">
             <a href="system/book/insert" class="btn btn-success">
                 添加图书
             </a>
         </div>
         <div class="row" style="padding: 15px;">
             <display:table name="${list }" id="bookIds" pagesize="" requestURI="system/book/select" class="table table-hover table-striped table-bordered">
                 <display:column property="bookId" title="图书编号"></display:column>
                 <display:column property="bookName" title="图书名称"></display:column>
                 <display:column property="bookAuthor" title="图书作者"></display:column>
                 <display:column property="bookPrice" title="图书价格"></display:column>
                 <display:column property="bookType" title="图书类型"></display:column>
                 <display:column property="bookPublish" title="图书出版社"></display:column>
                 <display:column property="bookSum" title="图书总数"></display:column>
                 <!-- 如果是管理员，具有借书，还书，修改，删除功能的权限 -->
                 <c:if test="${userMark == '管理员' }">
                     <display:column paramId="bookId" paramProperty="bookId" title="借书">
                         <!-- 按钮触发模态框 -->
                         <a href="" id="borrowBooks" onclick="borrowBooksFunction(<c:out value='${bookIds.bookId}'></c:out>)" data-toggle="modal" data-target="#myModal"> 借书
                         </a>
                     </display:column>
                     <display:column href="system/book/update" paramId="bookId" paramProperty="bookId" title="修改" value="修改"></display:column>
                     <display:column href="system/book/delete" paramId="bookId" paramProperty="bookId" title="删除" value="删除"></display:column>
                 </c:if>

             </display:table>
         </div>
     </form>

     <form action="${basePath }system/book/adminBorrow" method="post" class="form-horizontal setWidth">
         <!-- 模态框（Modal） -->
         <div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
             <div class="modal-dialog">
                 <div class="modal-content">
                     <div class="modal-header">
                         <button type="button" class="close" data-dismiss="modal" aria-hidden="true">
                             &times;
                         </button>
                         <h4 class="modal-title" id="myModalLabel">
                             用户信息
                         </h4>
                     </div>
                     <div class="modal-body">
                         <input type="hidden" name="bookId" id="setBookId" value=""/>
                         <select class="form-control width175" id="userNameCategory" name="userId">
                             <option value=''>-- 请选择 --</option>
                         </select>
                     </div>
                     <div class="modal-footer">
                         <button type="button" class="btn btn-default" data-dismiss="modal">关闭
                         </button>
                         <!-- <button type="button" class="btn btn-primary">
                             提交
                         </button> -->
                         <input type="submit" class="btn btn-success" value="提交" />
                     </div>
                 </div><!-- /.modal-content -->
             </div><!-- /.modal -->
         </div>
     </form>

 </body>
 </html>

效果如下所示：

2、关键点操作如下所示：

然后如下所示：

然后完成你想要实现的效果：

打完收工

待续......