Cookbook-Struts1.3.8案例分析－Simple Form using ActionForm

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l Simple Form using ActionForm

入口Action配置

</action>

<action path="/processSimple"

type="examples.simple.ProcessSimpleAction" name="simpleForm"

scope="request" input="/jsp/simple/Simple.jsp" cancellable="true"

validate="true">

<forward name="success"

path="/jsp/simple/SimpleResults.jsp" />

</action>

SuccessAction继承自Action类

Execute方法非常简单，转向success标识的页面simple.jsp

public ActionForward execute(

ActionMapping mapping,

ActionForm form,

HttpServletRequest request,

HttpServletResponse response)

throws Exception {

return mapping.findForward("success");

}

Form Jsp页面里用到的标签

<html:base/> 类似html的<base/>标签

<html:html xhtml="true" lang="true"> 类似与<html>标签

<html:link page="/jsp/simple/source.jsp">

XXX

</html:link> 类似<a href=?>XXX</a>

<html:errors/> 显示错误

<html:form action="/processSimple"> form，并定义一个Action

<html:text property="name" size="40" maxlength="50"/> 文本输入框

<html:password property="secret" size="40" maxlength="50"/> 密码输入框

<html:select property="color">

<html:option value="red">Red</html:option>

<html:option value="green">Green</html:option>

<html:option value="blue">Blue</html:option>

</html:select> 静态的下拉框

<html:radio property="rating" value="1">Actually, I hate it.</html:radio>

<html:radio property="rating" value="2">Not so much.</html:radio>静态单选按钮

<html:textarea property="message" cols="40" rows="6"/> 大文本框

<html:hidden property="hidden" value="Sssh! It's a secret. Nobody knows I'm here."/> 隐藏域

<html:submit>

<bean:message key="button.submit" />来自资源文件的文字

</html:submit>提交按钮

<html:cancel/>取消按钮

ActionForm类的定义

publicclass SimpleActionForm extends ActionForm 继承自ActionForm

public ActionErrors validate(

ActionMapping mapping,

HttpServletRequest request) {

ActionErrors errors = new ActionErrors(); 创建ActionErrors

// Name must be entered

if ((name == null) || (name.length() < 1)) {

errors.add("name", new ActionMessage("errors.name.required"));

} 添加ActionError

// Secret Phrase must be entered

if ((secret == null) || (secret.length() < 1)) {

errors.add("secret", new ActionMessage("errors.secret.required"));

}

return (errors);

}

publicvoid reset(ActionMapping mapping, HttpServletRequest request) {

this.name = null;

this.secret = null;

this.color = null;

this.confirm = false;

this.rating = null;

this.message = null;

this.hidden = null;

} 重置ActionForm的属性

Result JSP里用到的标签

<bean:write name="simpleForm" property="name" /> 输出actionform的属性值

<logic:equal name="simpleForm" property="confirm" value="true"> 逻辑判断属性值是否是true

<logic:notEqual name="simpleForm" property="confirm" value="true"> 逻辑判断属性值不是true

<bean:write name="simpleForm" property="message" filter="false"/> filter=false表示可以输出<>等符号

posted on 2008-07-08 02:21 MingIsMe 阅读(117) 评论(0) 编辑收藏所属分类: 16 案例分析

Samuel Learning

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Cookbook-Struts1.3.8案例分析－Simple Form using ActionForm