logic:iterate标签怎么用?

sailor11 2004-09-01 09:25:39
用iterate标签时,报下面的错,不知道是什么原因

<jsp:useBean id="cart" class="onLineBookStore.Cart" scope="session"/>
<c:set var="cart_v" value="${cart.items}"/>

<logic:iterate id="book" name="cart_v">
<tr bgcolor=""#008800"" >
<td>
<bean:write name="book" property="bookName"/>
</td>
</tr>
</logic:iterate>




HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: org/apache/commons/beanutils/PropertyUtils
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.cart_jsp._jspService(cart_jsp.java:142)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:298)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)


root cause

java.lang.NoClassDefFoundError: org/apache/commons/beanutils/PropertyUtils
org.apache.struts.util.RequestUtils.lookup(RequestUtils.java:952)
org.apache.struts.taglib.bean.WriteTag.doStartTag(WriteTag.java:286)
org.apache.jsp.cart_jsp._jspx_meth_bean_write_0(cart_jsp.java:176)
org.apache.jsp.cart_jsp._jspService(cart_jsp.java:117)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:298)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)


note The full stack trace of the root cause is available in the Apache Tomcat/5.0.24 logs.


--------------------------------------------------------------------------------

Apache Tomcat/5.0.24
...全文
163 6 打赏 收藏 转发到动态 举报
AI 作业
写回复
用AI写文章
6 条回复
切换为时间正序
请发表友善的回复…
发表回复
zawx 2004-09-02
  • 打赏
  • 举报
回复
这里的type指的是id的类型,抛出的异常说明类未找到。
<c:set value= ; var= ; scope= ; target= ; property= />
value 要存储的值
var 欲存入的变量名称
scope var变量的jsp范围
target 目标对象,javabean或者java.util.map对象
property指定target对象的属性

看来type并没有在这里设置
sailor11 2004-09-01
  • 打赏
  • 举报
回复
可以在<c:set>标签里设置type吗
sailor11 2004-09-01
  • 打赏
  • 举报
回复
<logic:iterate id="author" name="authorForm" property="authorBeans" type="edu.hust.sse.AuthorBean" indexId="idx">
这里定义的type是 id类型还是name的类型,我还是抛出了java.lang.NoClassDefFoundError
zawx 2004-09-01
  • 打赏
  • 举报
回复
idx 是定义了个序号,每行显示时,这个值+1
sailor11 2004-09-01
  • 打赏
  • 举报
回复
多谢,不过,这句没看懂,
<td><%= (idx.intValue() + 1) %></td>

indexId属性指的是什么
zawx 2004-09-01
  • 打赏
  • 举报
回复
给你一个例子:
<logic:iterate id="author" name="authorForm" property="authorBeans" type="edu.hust.sse.AuthorBean" indexId="idx">
<tr align="center" bgcolor="#F6F3F3">
<td><%= (idx.intValue() + 1) %></td>
<td bgcolor="#F6F3F3"><bean:write name="author" property="PKId"/></td>
<td><bean:write name="author" property="name"/></td>
</tr>
</logic:iterate>

我想你的问题,在于没有设置Type,无法“cart_v”的类型,不知道对不对,你可以试一下
我就是靠这个文档实现logic:iterate的循环的
struts 标签 logic:iterate使用 logic:iterate

第一页 是struts官方的说明,
第二页 是个例子
第三页 是我实现的arrayList放入标签的方法。
这是页面文件
<%@ page language="java"
import="java.util.*,cn.edu.bit.zgc2d.accountQuery.*" pageEncoding="GBK"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean"
prefix="bean"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html"
prefix="html"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic"
prefix="logic"%>









<%@ include file="../menu.txt"%>









账务查询


基本信息查询。














基本信息查询。







<logic:iterate id="item" name="list" indexId="index">





logic:iterate>

帐号

帐户别名

是否为主帐户

">







这是action
public class InformationAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
InformationForm informationForm = (InformationForm) form;// TODO Auto-generated method stub
//业务开始
Connection conn = null; Statement st = null; ResultSet rs = null;
try {
db db = new db();
// 打开数据库
conn = db.conn();
// 创建st
st = conn.createStatement();
// 组织sql并执行
HttpSession session_account = request.getSession();
String account = (String) session_account.getAttribute("account");
String sql = "select * from account where main_account=" + account
+ "order by is_main_account desc";
rs = st.executeQuery(sql);
// 组建arrayList列表
ArrayList list = new ArrayList();
while (rs.next()) {
accountBean bean = new accountBean();
bean.setArea(rs.getString("area")); bean.setKind(rs.getInt("kind")); bean.setAccount(rs.getString("account")); bean.setMain_account(rs.getString("main_account")); bean.setType(rs.getInt("type")); bean.setOther_name(rs.getString("other_name")); bean.setPassword(rs.getString("password")); bean.setIs_main_account(rs.getInt("is_main_account")); bean.setMoney(rs.getString("money")); bean.setId(rs.getInt("id"));
list.add(bean);
}
HttpSession session = request.getSession();
session.setAttribute("list", list);
return mapping.findForward("success");
} catch (Exception e) { e.printStackTrace(); }
//业务结束
return null;
}
}//自己将需要的包导入
bean文件
package cn.edu.bit.zgc2d.accountQuery;

public class accountBean {
private String area;
private int kind;
private String account;
private String main_account;
private int type;
private String other_name;
private String password;
private int is_main_account;
private String money;
private int id;
public String getArea() {
return area;
}
public void setArea(String area) {
this.area = area;
}
public int getKind() {
return kind;
}
public void setKind(int kind) {
this.kind = kind;
}
public String getAccount() {
return account;
}
public void setAccount(String account) {
this.account = account;
}
public String getMain_account() {
return main_account;
}
public void setMain_account(String main_account) {
this.main_account = main_account;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
public String getOther_name() {
return other_name;
}
public void setOther_name(String other_name) {
this.other_name = other_name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public int getIs_main_account() {
return is_main_account;
}
public void setIs_main_account(int is_main_account) {
this.is_main_account = is_main_account;
}
public String getMoney() {
return money;
}
public void setMoney(String money) {
this.money = money;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
}

81,122

社区成员

发帖
与我相关
我的任务
社区描述
Java Web 开发
社区管理员
  • Web 开发社区
加入社区
  • 近7日
  • 近30日
  • 至今
社区公告
暂无公告

试试用AI创作助手写篇文章吧