JSTL开发实例详解

现在做一个web项目，需要实现以下功能

选着不同的选项，显示不同的内容。

那么显然需要用到JSTL里的选择标签。

下面是实现方案：

前端的数据是后端服务给的，比如，grade字段是true则表明已经评分，id==null则表明没有提交。

<!--  作业列表 -->
            <div id="homeworkDetail">
                <div class="tabHomework">
                    <input type="radio" name="homework" value="1" checked="checked" /><label for="" class="checked">全部</label>
                    <input type="radio" name="homework" value="2" /> <label for="">未提交</label>
                    <input type="radio" name="homework" value="3" /> <label for="">未评分</label>
                    <input type="radio" name="homework" value="4" /> <label for="">已评分</label>

                </div>
                <!-- 全部列表 -->
                <ul class="homeWorkUL" id="all">
                    <c:forEach var="mymap" items="${map}">
                        <c:forEach var="submitMap" items="${mymap.value}" varStatus="abc">
                            <li><a href="mainView/courseHomework/courseHomeworkDetailLook.jsp?AssignmentSubmit=${submitMap.value}">
                                    <ul class="subHomeWorkUL">
                                        <li id="realName">${submitMap.value.realName}</li>
                                        <li id="userName">${submitMap.key}</li>
                                        <li id="Grade">
                                <c:choose>
                                    <c:when test="${submitMap.value.id == null}">未提交</c:when>
                                    <c:when test="${submitMap.value.rejected}">被打回</c:when>
                                    <c:when test="${submitMap.value.graded}">${submitMap.value.gradePoint}</c:when>
                                    <c:otherwise>   <strong>未评分</strong>  </c:otherwise>
                                </c:choose>
                                </li>   </ul>
                            </a>
                            </li>
                        </c:forEach>
                    </c:forEach>
                </ul>

                <!-- 未提交 -->
                <ul class="homeWorkUL" id="noSubmit">
                    <c:forEach var="mymap" items="${map}">
                        <c:forEach var="submitMap" items="${mymap.value}" varStatus="abc">
                            <c:choose>
                                <c:when test="${submitMap.value.id == null}">
                                    <li><a href="mainView/courseHomework/courseHomeworkDetailLook.jsp">
                                            <ul class="subHomeWorkUL">
                                                <li id="realName">${submitMap.value.realName}</li>
                                                <li id="userName">${submitMap.key}</li>
                                                <li id="state">未提交</li>
                                            </ul>
                                    </a></li>
                                </c:when>
                                <c:otherwise></c:otherwise>
                            </c:choose>
                        </c:forEach>
                    </c:forEach>
                </ul>

                <!-- 未评分 -->
                <ul class="homeWorkUL" id="noEvaluate">
                    <c:forEach var="mymap" items="${map}">
                        <c:forEach var="submitMap" items="${mymap.value}" varStatus="abc">
                            <c:choose>
                                <c:when test="${submitMap.value.id!=null && submitMap.value.graded eq false}">
                                    <li>
                                    <a href="mainView/courseHomework/courseHomeworkDetailLook.jsp">
                                            <ul class="subHomeWorkUL">
                                                <li id="realName">${submitMap.value.realName}</li>
                                                <li id="userName">${submitMap.key}</li>
                                                <li id="state">未评分</li>
                                            </ul>
                                    </a></li>
                                 </c:when>
                                <c:otherwise></c:otherwise>
                            </c:choose>
                        </c:forEach>
                    </c:forEach>
                </ul>

                <!--  已评分 -->
                <ul class="homeWorkUL" id="evaluate">
                    <c:forEach var="mymap" items="${map}">
                        <c:forEach var="submitMap" items="${mymap.value}" varStatus="abc">
                            <c:choose>
                                <c:when test="${submitMap.value.graded}">
                                <li>
                                <a href="mainView/courseHomework/courseHomeworkDetailLook.jsp">
                                     <ul class="subHomeWorkUL">
                                                <li id="realName">${submitMap.value.realName}</li>
                                                <li id="userName">${submitMap.key}</li>
                                                <li id="Grade">${submitMap.value.gradePoint}</li>
                                      </ul>
                                    </a>
                                </li>
                                </c:when>
                                <c:otherwise></c:otherwise>
                            </c:choose>
                        </c:forEach>
                    </c:forEach>
                </ul>
            </div>
        </div>
    </div>

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