struts三个常用标签

 

beanwrite

<h1>测试BeanWrite</h1>

       <hr>

       <li>普通字符串</li><br>

       hello(jsp脚本):<%=request.getAttribute("hello") %><br>

       hello(标签):<bean:write name="hello"/><br>

       <p>

       <li>html文本</li><br>

       bj(default):<bean:write name="bj"/><br>

       bj(filter="true"):<bean:write name="bj" filter="true"/><br>

       bj(filter="false"):<bean:write name="bj" filter="false"/><br>

       <p>

       <li>格式化日期</li><br>

       today(default):<bean:write name="today"/><br>

       today(format="yyyy-MM-dd HH:mm:ss"):<bean:write name="today" format="yyyy-MM-dd HH:mm:ss"/>

       <p>

       <li>格式化数字</li><br>

       n(default):<bean:write name="n"/><br>

       n(format="###,###.####"):<bean:write name="n" format="###,###.####"/><br>

       n(format="###,###.####"):<bean:write name="n" format="###,###.0000"/><br>

       <p>

       <li>结构</li><br>

       姓名：<input type="text" value="<bean:write name="user" property="username"/>"><br>

       年龄：<input type="text" value="<bean:write name="user" property="age"/>"><br>

       所属组：<input type="text" value="<bean:write name="user" property="group.name"/>"><br>

 

empty

 

<h1>测试empty,notEmpty,present,notPresent</h1>

       <hr>

       <logic:empty name="attr1">

              attr1为空<br>

       </logic:empty>

       <logic:notEmpty name="attr1">

              attr1不为空<br>

       </logic:notEmpty>

       <logic:present name="attr1">

              attr1存在<br>

       </logic:present>

       <logic:notPresent name="attr1">

              attr1不存在<br>

       </logic:notPresent>

      

       <p>

       <logic:empty name="attr2">

              attr2为空<br>

       </logic:empty>

       <logic:notEmpty name="attr2">

              attr2不为空<br>

       </logic:notEmpty>

       <logic:present name="attr2">

              attr2存在<br>

       </logic:present>

       <logic:notPresent name="attr2">

              attr2不存在<br>

       </logic:notPresent>

      

       <p>

       <logic:empty name="attr3">

              attr3为空<br>

       </logic:empty>

       <logic:notEmpty name="attr3">

              attr3不为空<br>

       </logic:notEmpty>

       <logic:present name="attr3">

              attr3存在<br>

       </logic:present>

       <logic:notPresent name="attr3">

              attr3不存在<br>

       </logic:notPresent>

 

Iterate

 

<h1>测试Iterate</h1>

       <hr>

       <li>jsp脚本</li><br>

       <table border="1">

              <tr>

                     <td>姓名</td>

                     <td>年龄</td>

                     <td>所属组</td>

              </tr>

              <%

                     List userList = (List)request.getAttribute("userlist");

                     if (userList == null || userList.size() == 0) {

              %>

                     <tr>

                            <td colspan="3">没有符合条件的数据!</td>

                     </tr>

              <%

                     }else {

                            for (Iterator iter=userList.iterator(); iter.hasNext(); ) {

                                   User user = (User)iter.next();

              %>

                     <tr>

                            <td><%=user.getUsername() %></td>

                            <td><%=user.getAge() %></td>

                            <td><%=user.getGroup().getName() %></td>

                     </tr>

              <%

                            }

                     }

              %>

       </table>

      

       <p>

       <li>标签</li><br>

       <table border="1">

              <tr>

                     <td>姓名</td>

                     <td>年龄</td>

                     <td>所属组</td>

              </tr>

              <logic:empty name="userlist">

                     <tr>

                            <td colspan="3">没有符合条件的数据!</td>

                     </tr>

              </logic:empty>

              <logic:notEmpty name="userlist">

                     <logic:iterate id="u" name="userlist">

                            <tr>

                                   <td>

                                          <bean:write name="u" property="username"/>

                                   </td>

                                   <td>

                                          <bean:write name="u" property="age"/>

                                   </td>

                                   <td>

                                          <bean:write name="u" property="group.name"/>

                                   </td>

                            </tr>

                     </logic:iterate>

              </logic:notEmpty>

       </table>