Struts_BeanWrite标签

最新推荐文章于 2023-12-11 20:09:42 发布

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#struts #bean #string #user #filter #input

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本文介绍了Struts框架中BeanWrite标签的使用方法，包括显示普通字符串、HTML文本、日期和数字格式化等内容，并通过实例展示了如何利用该标签输出结构化的对象属性。

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show.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%> <%@ taglib prefix="bean" uri="/WEB-INF/struts-bean.tld"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>beanWrite标签</title> </head> <body> <h1> 测试beanwrite </h1> <li> 普通字符串 </li> <br> (hello)jsp脚本:<%=request.getAttribute("hello")%><br> (hello)struts标签: <bean:write name="hello" /> <p> <li> html文本 </li> <br> 默认 bj: <bean:write name="bj" /> <br> bj (filter="true"): <bean:write name="bj" filter="true" /> <br> bj (filter="false"): <bean:write name="bj" filter="false" /> <p> <li> 格式化日期 </li> <br> today : <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> 数字格式化 </li> <br> num : <bean:write name="num" /> <br> num format="####,####.####" : <bean:write name="num" format="####,####.####" /> <br> num format="####,####.0000" : <bean:write name="num" format="####,####.0000" /> <br><p> <li> 结构对象 </li> <br> 小组: <input type="text" value="<bean:write name="user" property="group.groupname"/>" /> <br> 名字: <input type="text" value="<bean:write name="user" property="username"/>" /> <br> 年龄: <input type="text" value="<bean:write name="user" property="age"/>" /> <br> </body> </html>

web.action

package web.action; import java.util.Date; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import entity.Group; import entity.User; /** * BeanWrite标签 */ public class BeanWriteAction extends Action { public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { // 普通文本 request.setAttribute("hello", "Hello World!"); // html 代码 request.setAttribute("bj", "<font color='red'>北京欢迎您!</font>"); // 日期 request.setAttribute("today", new Date()); // 数字的格式化 request.setAttribute("num", 12345.678); // 结构 Group group = new Group(); group.setGroupname("第一小组"); User user = new User(); user.setUsername("张三"); user.setAge(18); user.setGroup(group); request.setAttribute("user", user); return new ActionForward("/show.jsp"); } }

entity

package entity; public class Group { private String groupname; public String getGroupname() { return groupname; } public void setGroupname(String groupname) { this.groupname = groupname; } }

package entity; public class User { private String username; private int age; private Group group; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public Group getGroup() { return group; } public void setGroup(Group group) { this.group = group; } }

配置文件

struts-config.xml

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"> <struts-config> <data-sources /> <form-beans /> <global-exceptions /> <global-forwards /> <action-mappings > <action path="/beanwrite" type="web.action.BeanWriteAction"></action> </action-mappings> <message-resources parameter="web.ApplicationResources" /> </struts-config>

效果图