javaweb框架开发篇之Struts常用标签库

2017年03月09日

目录

1 Struts标签库简介

NO. 标签库 描述
1 Bean标签 管理JSP页面中的bean操作
2 Logic标签 完成各种逻辑控制操作
3 HTML标签 显示标签，主要生成HTML标记
4 TILES标签 使用动态模板构造显示页面
5 NESTED标签 使用嵌套标签进行复杂的页面显示

2 Bean标签

2.1 bean:define标签

<%@ page language="java" pageEncoding="UTF-8"%> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<bean:define id="info" scope="page"> Hello World!!!</bean:define> 
	<bean:define id="teacher" value="冯孟昭"/> 
	<h3> 定义内容：${info }</h3> 
	<h3> 老师：${pageScope.teacher }</h3> 
  </body>  
</html:html>

定义一个JavaBean-CopyBean.java

package org.fmz.struts.vo;

public class CopyBean {
	private String msg ;

	public String getMsg() {
		return msg;
	}

	public void setMsg(String msg) {
		this.msg = msg;
	}
}

在JSP页面中定义并且复制此Bean-bean-copy.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<jsp:useBean id="copybean" class="org.fmz.struts.vo.CopyBean" scope="page"/> 
	<jsp:setProperty name="copybean" property="msg" value="Hello FMZ"/> 
	<bean:define id="info" name="copybean" property="msg"/> 
	<h3> 拷贝：${info }</h3> 
  </body> 
</html:html>

2.2 bean:size标签

计算集合的长度-bean_size.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*" %> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<%
		List list = new ArrayList() ;
		list.add("Hello") ;
		list.add("FMZ") ;
		list.add("光临！") ;
		pageContext.setAttribute("info", list) ;
	 %> 
	 <bean:size id="len" name="info" scope="page"/> 
	 <h3> 集合长度：${len }</h3> 
  </body> 
</html:html>

2.3 资源访问标签

设置Cookie-cookie.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*" %> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://str2015-09-20uts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<bean:cookie name="username" id="mycookie" value="FMZ"/> 
	<%
		mycookie.setMaxAge(3000) ;
		response.addCookie(mycookie) ;
		Cookie[] cookies = request.getCookies() ;
		for(int x=0;x<cookies.length;x++){
	%> 
			<h3> <%=cookies[x].getName() %>  -->  <%=cookies[x].getValue() %> </h3> 
	<%
		} 
	 %> 
  </body> 
</html:html>

设置头信息-header.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*" %> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<bean:header name="Accept-Language" id="myheader"/> 
			<h3> Accept-Language头信息内容：${myheader }</h3> 
  </body> 
</html:html>

设置参数-param.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*" %> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base />  	
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<bean:parameter id="myparam" name="msg" value="FMZ"/> 
	<h3> myparam的内容：${myparam}</h3> 
  </body> 
</html:html>

2.4 bean:write标签

使用bean:write输出-bean_write.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*" %> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base />  	
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<bean:define id="info" scope="page"> 
		<h3> Hello FMZ</h3> 
	</bean:define> 
	<bean:write name="info"/> 
  </body> 
</html:html>

2.5 bean:include标签

定义被包含页面-content.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*" %> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base />  	
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<h3> Hello FMZ</h3> 
  </body> 
</html:html>

使用bean:include标签包含页面-include.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*" %> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base />  	
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<bean:include id="inc" page="/content.jsp"/> 	
	${inc }
  </body> 
</html:html>

2.6 bean:resourec标签

定义被包含页面-content.xml

<?xml version="1.0" encoding="utf-8"?> 
<book> 
	<author> 冯孟昭</author> 
	<title> java开发实战经典</title> 
</book>

使用bean:resource包含页面-resource.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*" %> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base />  	
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<bean:resource id="source" name="/content.xml"/> 
	<bean:write name="source"/> 
  </body> 
</html:html>

2.7 国际化与bean:message

Struts本事支持国际化程序的开发，用户只需要根据区域的不同配置不同的语言资源文件(资源文件通过struts-config.xml指定)，此处为ApplicationResource.properties，即可显示不同区域的语言。

定义中文资源文件-ApplicationResource_zh_CN.properties

# Resources for parameter 'org.fmz.struts.ApplicationResources'
# Project StrutsBean
hello.info =<h3> {0}\u60A8\u597D\uFF0C\u6B22\u8FCE{1}\u5149\u4E34\uFF01</h3>

转码操作通过doc启动native2ascii即可

定义中文资源文件-ApplicationResource_en_US.properties

# Resources for parameter 'org.fmz.struts.ApplicationResources'
# Project StrutsBean
hello.info =<h3> {0} hello,welcome{1}\uFF01</h3>

使用bean:message读取资源文件-message.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*" %> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base />  	
    
    <title> bean_define.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 
  </head> 
  
  <body> 
	<bean:message key="hello.info" arg0="FMZ" arg1="CLL"/> 
  </body> 
</html:html>

通过浏览器的语言设置，重启浏览器后即可完成国际化的转变。

3 Logic标签

Logic标签的主要作用是进行各种逻辑处理，如执行分支语句、迭代、比较操作等，所有的logic标签都定义在struts-logic.tld文件中

3.1 logic:present & logic:notPresent标签

判断属性是否存在-present.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 

<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> present.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 

  </head> 
  
  <body> 
	<%
		request.setAttribute("author", "fmz") ;
	 %> 
	 <logic:present name="author" scope="request"> 
		<h3> author属性存在，内容是：${author }</h3> 
	 </logic:present> 
	 <logic:notPresent name="url" scope="request"> 
		<h3> url属性不存在！</h3> 
	 </logic:notPresent> 
  </body> 
</html:html>

3.2 logic:empty & logic:notEmpty标签

判断内容是否为空-empty.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*"%> 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> present.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 

  </head> 
  
  <body> 
	<% 
		List<String>  list = new ArrayList<String> () ;
		request.setAttribute("author",list) ;  		
	 %> 
	 <logic:empty name="author" scope="request"> 
		<h3> 属性的内容为空，长度为0！</h3> 
	 </logic:empty> 
	 <logic:empty name="url" scope="request"> 
		<h3> url属性不存在！</h3> 
	 </logic:empty> 
  </body> 
</html:html>

3.3 关系运算标签

关系运算标签的使用-rel.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*"%> 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> present.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 

  </head> 
  
  <body> 
	<% 
		request.setAttribute("author","fmz") ;
		request.setAttribute("num",30) ;
	 %> 
	 <logic:equal name="author" value="fmz" scope="request"> 
		<h3> 满足等于条件！</h3> 
	 </logic:equal> 
	 <logic:notEqual name="url" value="fmz" scope="request"> 
		<h3> 不满足等于条件！</h3> 
	 </logic:notEqual> 
  </body> 
</html:html>

3.4 logic:iterate标签

输出集合对象-iterate.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*"%> 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> present.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 

  </head> 
  
  <body> 
	<% 
		String allArr[] = {"fmz","cll","wlm"} ;
		request.setAttribute("allArr",allArr) ;
	 %> 
	<h3> 输入对象数组：</h3> 
	<logic:iterate id="arr" name="allArr" scope="request"> 
		<h3> 名字：${arr }</h3>  
	</logic:iterate> 
	<%
		List<String>  allList = new ArrayList<String> () ;
		allList.add("fmz") ;
		allList.add("cll") ;
		allList.add("wlm") ;
		request.setAttribute("allList",allList) ;
	 %> 
	 <h3> 输入List集合：</h3> 
	<logic:iterate id="arr" name="allList" scope="request"> 
		<h3> 名字：${arr }</h3>  
	</logic:iterate> 
	<%
		Map<String,String>  allMap = new HashMap<String,String> () ;
		allMap.put("name1","fmz") ;
		allMap.put("name2","cll") ;
		allMap.put("name3","wlm") ;
		request.setAttribute("allMap",allMap) ;
	 %> 
	  <h3> 输入Map集合：</h3> 
	<logic:iterate id="map" name="allMap" scope="request"> 
		<h3> 名字${map.key } -->  ${map.value }</h3>  
	</logic:iterate> 
  </body> 
</html:html>

3.5 充定向标签-logic:redirect标签

修改struts-config.xml，增加全局跳转，修改global-farward元素

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"> 

<struts-config> 
  <form-beans /> 
  <global-exceptions /> 
  <global-forwards> 
	<forward name="hello" path="/hello.jsp"/> 
  </global-forwards> 
  <action-mappings /> 
  <message-resources parameter="org.fmz.struts.ApplicationResources" /> 
</struts-config>

跳转后的页面-hello.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*"%> 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> present.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 

  </head> 
  
  <body> 
	<logic:redirect forward="hello"/> 
  </body> 
</html:html>

使用logic:redirect标签进行跳转-redirect.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*"%> 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> present.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 

  </head> 
  
  <body> 
	<logic:redirect forward="hello"/> 
  </body> 
</html:html>

4 Html标签

Html标签主要用于页面显示。

4.1 实例：编写基本表单

定义输入表单-input_simple.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*"%> 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> present.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 

  </head> 
  
  <body> 
	<% 
		request.setCharacterEncoding("utf-8") ;
	 %> 
	 <html:form action="simple.do" method="post"> 
		姓名：<html:text property="name"/> <br> 
		密码：<html:password property="password"/> <br> 
		性别：<html:radio property="sex" value="male"/> 男
		<html:radio property="sex" value="female"/> 女<br> 
		简介：<html:textarea property="note" cols="30" rows="3"/> <br> 
		<html:hidden property="id" value="30"/> 
		<html:submit value="提交"/> 
		<html:reset value="重置"/> 
	 </html:form> 
  </body> 
</html:html>

定义ActionForm-SimpleForm.java

/*
 - Generated by MyEclipse Struts
 - Template path: templates/java/JavaClass.vtl
 */
package org.fmz.struts.form;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;

/*- 
 - MyEclipse Struts
 - Creation date: 09-26-2015
 - 
 - XDoclet definition:
 - @struts.form name="simpleForm"
 */
public class SimpleForm extends ActionForm {
	/*
	 - Generated fields
	 */

	/*- id property */
	private int id;

	/*- sex property */
	private String sex;

	/*- name property */
	private String name;

	/*- password property */
	private String password;

	/*- note property */
	private String note;

	/*
	 - Generated Methods
	 */

	/*- 
	 - Method validate
	 - @param mapping
	 - @param request
	 - @return ActionErrors
	 */
	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
		// TODO Auto-generated method stub
		return null;
	}

	/*- 
	 - Method reset
	 - @param mapping
	 - @param request
	 */
	public void reset(ActionMapping mapping, HttpServletRequest request) {
		// TODO Auto-generated method stub
		this.sex = "男" ;
	}

	/*- 
	 - Returns the id.
	 - @return int
	 */
	public int getId() {
		return id;
	}

	/*- 
	 - Set the id.
	 - @param id The id to set
	 */
	public void setId(int id) {
		this.id = id;
	}

	/*- 
	 - Returns the sex.
	 - @return String
	 */
	public String getSex() {
		return sex;
	}

	/*- 
	 - Set the sex.
	 - @param sex The sex to set
	 */
	public void setSex(String sex) {
		this.sex = sex;
	}

	/*- 
	 - Returns the name.
	 - @return String
	 */
	public String getName() {
		return name;
	}

	/*- 
	 - Set the name.
	 - @param name The name to set
	 */
	public void setName(String name) {
		this.name = name;
	}

	/*- 
	 - Returns the password.
	 - @return String
	 */
	public String getPassword() {
		return password;
	}

	/*- 
	 - Set the password.
	 - @param password The password to set
	 */
	public void setPassword(String password) {
		this.password = password;
	}

	/*- 
	 - Returns the note.
	 - @return String
	 */
	public String getNote() {
		return note;
	}

	/*- 
	 - Set the note.
	 - @param note The note to set
	 */
	public void setNote(String note) {
		this.note = note;
	}
}

定义Action-SimpleAction.java

/*
 - Generated by MyEclipse Struts
 - Template path: templates/java/JavaClass.vtl
 */
package org.fmz.struts.action;

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 org.fmz.struts.form.SimpleForm;

/*- 
 - MyEclipse Struts
 - Creation date: 09-26-2015
 - 
 - XDoclet definition:
 - @struts.action path="/simple" name="simpleForm" input="/input_simple.jsp" scope="request" validate="true"
 */
public class SimpleAction extends Action {
	/*
	 - Generated Methods
	 */

	/*- 
	 - Method execute
	 - @param mapping
	 - @param form
	 - @param request
	 - @param response
	 - @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		try{
			request.setCharacterEncoding("utf-8") ;
		}catch(Exception e){
			e.printStackTrace() ;
		}
		SimpleForm simpleForm = (SimpleForm) form;// TODO Auto-generated method stub
		System.out.println("编号："+simpleForm.getId()) ;
		System.out.println("姓名："+simpleForm.getName()) ;
		System.out.println("性别："+simpleForm.getSex()) ;
		System.out.println("密码："+simpleForm.getPassword()) ;
		System.out.println("简介："+simpleForm.getNote()) ;
		return null;
	}
}

4.2 复选框标签

定义表单-input_box.jsp

<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*"%> 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> present.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 

  </head> 
  
  <body> 
	<% 
		request.setCharacterEncoding("utf-8") ;
	 %> 
	 <html:form action="box.do" method="post"> 
		<html:checkbox property="inst" value="sing"/> 唱歌
		<html:checkbox property="inst" value="dance"/> 跳舞
		<html:checkbox property="inst" value="read"/> 读书
		<html:checkbox property="inst" value="write"/> 写作
		<html:checkbox property="inst" value="swim"/> 游泳<br> 
		<html:submit value="提交"/> 
		<html:reset value="重置"/> 
	 </html:form> 
  </body> 
</html:html>

定义ActionForm-BoxForm.java

/*
 - Generated by MyEclipse Struts
 - Template path: templates/java/JavaClass.vtl
 */
package org.fmz.struts.form;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;

/*- 
 - MyEclipse Struts
 - Creation date: 09-26-2015
 - 
 - XDoclet definition:
 - @struts.form name="boxForm"
 */
public class BoxForm extends ActionForm {
	
	private String[] inst = {"编程","编程","编程","编程","编程"} ;
	
	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
		// TODO Auto-generated method stub
		return null;
	}

	/*- 
	 - Method reset
	 - @param mapping
	 - @param request
	 */
	public void reset(ActionMapping mapping, HttpServletRequest request) {
		// TODO Auto-generated method stub
	}

	public String[] getInst() {
		return inst;
	}

	public void setInst(String[] inst) {
		this.inst = inst;
	}
}

定义Action-BoxAction.java

/*
 - Generated by MyEclipse Struts
 - Template path: templates/java/JavaClass.vtl
 */
package org.fmz.struts.action;

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 org.fmz.struts.form.BoxForm;

/*- 
 - MyEclipse Struts
 - Creation date: 09-26-2015
 - 
 - XDoclet definition:
 - @struts.action path="/box" name="boxForm" input="/input_box.jsp" scope="request" validate="true"
 */
public class BoxAction extends Action {
	/*
	 - Generated Methods
	 */

	/*- 
	 - Method execute
	 - @param mapping
	 - @param form
	 - @param request
	 - @param response
	 - @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		try{
			request.setCharacterEncoding("utf-8") ;
		}catch(Exception e){
			e.printStackTrace() ;
		}
		BoxForm boxForm = (BoxForm) form;// TODO Auto-generated method stub
		String[] inst = boxForm.getInst() ;
		System.out.println("兴趣：") ;
		for(int i=0;i<inst.length;i++){
			System.out.print(inst[i]+"\t") ;
		}
		return null;
	}
}

4.3 下拉列表框

定义vo类-city.java

package org.fmz.struts.vo;

public class City {
	private String name ;
	private int id ;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
}

编写表单文件-input_select.jsp

<%@ page import="org.apache.struts.util.LabelValueBean"%> 
<%@ page language="java" pageEncoding="UTF-8"%> 
<%@ page import="java.util.*,org.fmz.struts.vo.*"%> 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %> 
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %> 
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> 


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html:html lang="true"> 
  <head> 
    <html:base /> 
    
    <title> present.jsp</title> 

	<meta http-equiv="pragma" content="no-cache"> 
	<meta http-equiv="cache-control" content="no-cache"> 
	<meta http-equiv="expires" content="0">     
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
	<meta http-equiv="description" content="This is my page"> 

  </head> 
  
  <body> 
	<% 
		request.setAttribute("author","fmz") ;
	 %> 
	 <%
		List all = new ArrayList() ;
		City city = new City() ;
		city.setId(1) ;
		city.setName("南阳") ;
		all.add(city) ;
		city = new City() ;
		city.setId(2) ;
		city.setName("成都") ;
		all.add(city) ;
		request.setAttribute("allCity",all) ;
	  %> 
	  <%
		all = new ArrayList() ;
		all.add(new LabelValueBean("管理员","admin")) ;
		all.add(new LabelValueBean("游客","guest")) ;
		request.setAttribute("allUser",all) ;
	  %> 
	  <html:form action="select.do" method="post"> 
		水果：<html:select property="fruit"> 
			<html:option value="xg"> 西瓜</html:option> 
			<html:option value="pg"> 苹果</html:option> 
		</html:select> 
		城市：<html:select property="city"> 
			<html:options collection="allCity" labelProperty="name" property="id"/> 
		</html:select> 
		用户：<html:select property="user"> 
			<html:optionsCollection name="allUser" label="label" value="value"/> 
		</html:select> <br> 
		<html:submit value="提交"/> 
		<html:reset value="重置"/> 
	  </html:form> 
  </body> 
</html:html>

定义ActionForm-SelectForm.java

/*
 - Generated by MyEclipse Struts
 - Template path: templates/java/JavaClass.vtl
 */
package org.fmz.struts.form;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;

/*- 
 - MyEclipse Struts
 - Creation date: 09-26-2015
 - 
 - XDoclet definition:
 - @struts.form name="selectForm"
 */
public class SelectForm extends ActionForm {
	private String fruit ;
	private String city ;
	private String user ;
	/*
	 - Generated Methods
	 */

	/*- 
	 - Method validate
	 - @param mapping
	 - @param request
	 - @return ActionErrors
	 */
	public ActionErrors validate(ActionMapping mapping,
			HttpServletRequest request) {
		// TODO Auto-generated method stub
		return null;
	}

	/*- 
	 - Method reset
	 - @param mapping
	 - @param request
	 */
	public void reset(ActionMapping mapping, HttpServletRequest request) {
		// TODO Auto-generated method stub
	}

	public String getFruit() {
		return fruit;
	}

	public void setFruit(String fruit) {
		this.fruit = fruit;
	}

	public String getCity() {
		return city;
	}

	public void setCity(String city) {
		this.city = city;
	}

	public String getUser() {
		return user;
	}

	public void setUser(String user) {
		this.user = user;
	}
}

定义Action文件-SelectAction.java

/*
 - Generated by MyEclipse Struts
 - Template path: templates/java/JavaClass.vtl
 */
package org.fmz.struts.action;

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 org.fmz.struts.form.SelectForm;

/*- 
 - MyEclipse Struts
 - Creation date: 09-26-2015
 - 
 - XDoclet definition:
 - @struts.action path="/select" name="selectForm" input="/input_select.jsp" scope="request" validate="true"
 */
public class SelectAction extends Action {
	/*
	 - Generated Methods
	 */

	/*- 
	 - Method execute
	 - @param mapping
	 - @param form
	 - @param request
	 - @param response
	 - @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		SelectForm selectForm = (SelectForm) form;// TODO Auto-generated method stub
		System.out.println("水果："+selectForm.getFruit()) ;
		System.out.println("城市："+selectForm.getCity()) ;
		System.out.println("用户："+selectForm.getUser()) ;
		return null;
	}
}
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