struts标签

配置：
* 在struts-config.xml文件中加入
<message-resources parameter="MessageResources" />
* 拷贝MessageResources.properties文件到src下
使用：
* 采用taglib指令引入
<%@ taglib prefix="bean" uri="http://struts.apache.org/tags-bean"%>
<%@ taglib prefix="logic" uri="http://struts.apache.org/tags-logic"%>

<bean:write>标签

//普通属性
request.setAttribute("hello", "Hello World");

hello(标签):<bean:write name="hello"/>

//html文本
request.setAttribute("bj", "<font color='red'>北京欢迎您</font>");

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

//日期
request.setAttribute("today", new Date());

today：<bean:write name="today" format="yyyy-MM-dd HH:mm:ss"/>
//数字
request.setAttribute("n", 123456.987);

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

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

//结构
Group group = new Group();
group.setName("尚学堂");
User user = new User();
user.setUsername("张三");
user.setAge(18);
user.setGroup(group);
request.setAttribute("user", user);

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

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

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

<logic:empty >与<logic:iterate>标签

Group group = new Group();
group.setName("尚学堂");

List userList = new ArrayList();
for (int i=0; i<10; i++) {
User user = new User();
user.setUsername("user_" + i);
user.setAge(18+i);
user.setGroup(group);
userList.add(user);
}
request.setAttribute("userlist", userList);

<logic:empty name="userlist">
没有符合条件的数据!

</logic:empty>

<logic:notEmpty name="userlist">
<logic:iterate id="u" name="userlist">
<bean:write name="u" property="username"/>
<bean:write name="u" property="age"/>
<bean:write name="u" property="group.name"/>
</logic:iterate>
</logic:notEmpty>