图书管理系统首页--jstl应用

灰太狼 2022-04-10 04:15 182阅读 0赞

**导入标签库：**

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
    <%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>

<body>
      	 <p> <input type = "hidden" id = "add" value="新增" />
      	 <c:if test="${power == 'delete' }">
      	 	<input type = "button" id = "deleteAll" value="批量删除" />
      	 </c:if>
     	 
     </p>
      <p> 
      	<form action="ToBookListServlet.do" method="post">
      		书名：<input type = "text" id = "qbookName" name="qbookName" value="${pageBean.query.qbookName }" >  
      		图书类型：<select id="qtypeId" name="qtypeId">
      					<option value="0" selected="selected" >--全部--</option>
      					<c:forEach var="type" items="${typeList }">
      						<option value="${type.typeId }" <c:if test="${type.typeId == pageBean.query.qtypeId }">selected="selected"</c:if>>${type.typeName }</option>
      					</c:forEach>
      			    </select>

**jstl格式化日期:**

出版日期区间：从<input type = "date" id = "startDate" name="startDate" value="<fmt:formatDate value='${pageBean.query.startDate }' pattern='yyyy-MM-dd'/>" />
      		到<input type = "date" id = "endDate" name="endDate" value="<fmt:formatDate value='${pageBean.query.endDate }' pattern='yyyy-MM-dd'/>"/>  
      		<input type = "submit" value="查询" />
      	</form>
      </p>
        <table id = "bookList">
        	<tr>
        		<c:if test="${power =='delete' }">
        			<td><input type="checkbox" name="selectAll"  onclick="selectAll(this)"/>全选</td>
        		</c:if>
        		<td>编号</td>
    			<td>书名</td>
    			<td>类型</td>
    			<td>作者</td>
    			<td>出版社</td>
    			<td>出版日期</td>
    			<td>库存</td>
    			<c:if test="${power =='delete' or power == 'modify'}">
        			<td>操作</td>
        		</c:if> 
    			
        	</tr>
        	<c:forEach var="book" items="${bookList }">
        		<tr>
       				<c:if test="${power =='delete' }">
       					<td><input type="checkbox" name="cbox"	value="${book.bookId }"  /></td>
       				</c:if>
    	    		<td>${book.bookId }</td>
    				<td>${book.bookName }</td>
    				<td>${book.bookType.typeName }</td>
    				<td>${book.author }</td>
    				<td>${book.publish }</td>
    				<td><fmt:formatDate value="${book.pubDate }" pattern="yyyy-MM-dd"/></td>
    				<td>${book.stock }</td>
    				
    					<c:if test="${power =='delete' }">
    						<td>
    	    					<input type="button" name="del_btn" value="删除" onclick="deleteBook('${book.bookId }')"/>
    	    				</td>
        				</c:if>
        				<c:if test="${power =='modify' }">
    	    				<td>
    	    					<input type="button" name="mod_btn" value="修改" onclick="modify('${book.bookId }')"/>
    	    				</td>
        				</c:if>
    					
    				
    			</tr>
        	</c:forEach>
        </table>

**动态拼接url：**

<c:url var="carUrl" value="ToBookListServlet.do">
        	<c:param name="qbookName" value="${pageBean.query.qbookName }"></c:param>
        	<c:param name="qtypeId" value="${pageBean.query.qtypeId }"></c:param>

**param的value：**

<c:param name="startDate" >
        		<fmt:formatDate value="${pageBean.query.startDate }" pattern="yyyy-MM-dd"/>
        	</c:param>
        	<c:param name="endDate" >
        		<fmt:formatDate value="${pageBean.query.endDate }" pattern="yyyy-MM-dd"/>
        	</c:param>
        	<c:if test="${power =='delete' }">
    			<c:param name="power" value="delete"></c:param>
        	</c:if>
        	<c:if test="${power =='modify' }">
    			<c:param name="power" value="modify"></c:param>
        	</c:if>
        </c:url>
        <p>

**jstl的多分支:choose**

<c:choose>
        	<c:when test="${pageBean.totalPage != 0}">
        		<a href="${carUrl }&page=1">首页</a>  
        	
        		<c:choose>
        			<c:when test='${pageBean.page!=1 }'><a href="${carUrl }&page=${pageBean.page - 1}">上一页</a></c:when>
        			<c:otherwise><a>上一页</a>  </c:otherwise>
        		</c:choose>
        		<c:choose>
        			<c:when test='${pageBean.page < pageBean.totalPage }'><a href="${carUrl }&page=${pageBean.page + 1}">下一页</a></c:when>
        			<c:otherwise><a>下一页</a>  </c:otherwise>
        		</c:choose>
        		<a href="${carUrl }&page=${pageBean.totalPage}">尾页</a>  
        		<span id="pager">${pageBean.page } / ${pageBean.totalPage}</span>
        	</c:when>
        	<c:otherwise>
        		暂无数据
        	</c:otherwise>
        	</c:choose>
        </p>
      
      </body>