您的位置：首页 > 编程语言 > Java开发

小案例：struts1.3利用nested标签使用POJO

2014-02-18 15:20 405 查看

其中的关键就是这个POJO是你自己去new一个，struts是不会帮你创建的！参考http://luohua.iteye.com/blog/39976

表单页

<%@ page language="java" contentType="text/html; charset=GBK"
pageEncoding="GBK"%>
<%@ 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-nested" prefix="nested" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
</head>
<body>
<span style="color:red"><html:errors property="emptycontent"/></span>
<html:form action="/jwid/struts1x/14.5/usebean.do" method="post">
INFO:<html:text property="info"/><br>
<nested:nest property="person">
姓名：<nested:text property="name"/><br>
年龄：<nested:text property="age"/><br>
</nested:nest>
<html:submit value="提交"/><html:reset value="重置"/>
</html:form>
</body>
</html>

ActionForm

public class UseBeanForm extends ActionForm {

private Person person = new Person(); // You must initialize this bean by yourself!!!
private String info;
public String getInfo() {
return info;
}
public Person getPerson() {
return person;
}
public void setInfo(String info) {
this.info = info;
}
public void setPerson(Person person) {
this.person = person;
}

@Override
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
ActionErrors errors = new ActionErrors();
if (info == null || info.trim().length() == 0) {
errors.add("emptycontent", new ActionMessage("jwid.c14.section14dot5.emptyconent"));
}
if (person == null || person.getName().trim().length() == 0 || person.getAge() <= 0) {
errors.add("emptycontent", new ActionMessage("jwid.c14.section14dot5.emptyconent"));
}
return errors;
}

}

Action

public class UseBeanAction extends Action {

@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
UseBeanForm useBeanForm = (UseBeanForm)form;
String info = useBeanForm.getInfo();
if (info.length() > 5) {
return mapping.findForward("infoMore");
} else {
return mapping.findForward("infoLess");
}
}

}

结果页1 info_less.jsp

<%@ page language="java" contentType="text/html; charset=GBK"
pageEncoding="GBK"%>
<%@ 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" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
</head>
<body>
info.length <= 5<br>
${requestScope.info }<br>
${requestScope.person.name }<br>
${requestScope.person.age }
</body>
</html>

结果页2 info_more.jsp

<%@ page language="java" contentType="text/html; charset=GBK"
pageEncoding="GBK"%>
<%@ 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" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
</head>
<body>
info.length > 5<br>
${requestScope.info }<br>
${requestScope.person.name }<br>
${requestScope.person.age }
</body>
</html>

struts-config.xml

<form-bean name="useBeanForm"
type="jwid.c14.section14dot5.UseBeanForm" />

<action attribute="useBeanForm" name="useBeanForm" scope="request"
path="/jwid/struts1x/14.5/usebean" input="/jwid/struts1x/14.5/use_bean.jsp"
type="jwid.c14.section14dot5.UseBeanAction">
<forward name="infoMore" path="/jwid/struts1x/14.5/info_more.jsp"/>
<forward name="infoLess" path="/jwid/struts1x/14.5/info_less.jsp"/>
</action>

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航