jsp 显示不了刚查询出来的结果

Alaska_Lee 2015-07-30 11:45:40



<%@ page language="java" contentType="text/html; charset=UTF-8" isELIgnored="false"%>

<%-- <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>     --%>

<jsp:directive.page import="com.smoothlybelt.dao.ProductDao"/>

<jsp:directive.page import="com.smoothlybelt.been.Product"/>

<jsp:directive.page import="java.util.List"/>

<jsp:directive.page import="java.util.Iterator"/>

    

<% 

	List<Product> productList = ProductDao.listProducts();

    Iterator<Product> it = productList.iterator();

	while(it.hasNext()){

		Product p = it.next();

		System.out.println(p.getProductId());

		System.out.println(p.getStoreId());

		System.out.println(p.getSalesTotalVolume());

		System.out.println(p.getProductEvalute());

	}



	request.setCharacterEncoding("utf-8"); 

	response.setContentType("text/html;charset=utf-8");

	request.setAttribute("productList", productList);

	

%>



<html text-algin="center">



<form action="" method = get>

	<table bgcolor = #cccccc cellspacing=1 cellpadding=5 width=100%  >

		<tr bgcolor=#dddddd>

			

			<th>产品ID</th>

			<th>商店ID</th>

			<th>产品价格</th>

			<th>产品状态</th>

			<th>发布时间</th>

			<th>产品总销量</th>

			<th>最小免费金额</th>

		</tr> 

		<c:forEach items="${productList} " var="product">

			<tr bgcolor=#dddddd height=50>

			<td>${product.productId}</td>

			<td>${product.storeId}</td>

			<td>${product.productPrise}</td>

			<td>${product.productState}</td>

			<td>${product.publishTime}</td>

			<td>${product.salesTotalVolume}</td>

			<td>${product.minFreeCost}</td>

			</tr>

		</c:forEach>

	</table>

</form>



</html>

本人刚学java web，按书上写了个例子。
productList中可以明确是有结果的，while循环里面的结果也是可以打出来的，但是为什么最终页面表格里面显示不出数据？

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Alaska_Lee 2015-08-11

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在9楼的基础上终于找到原因了 <c:forEach items="${productList} " var="product"> 这句话{}后面留了一个空格. 诶郁闷呢死了

菜鸟营新兵 2015-08-03

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#9楼好像说对了

qq137510669 2015-08-03

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你最上面的<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>被注释掉了，<c:foreach>标签是从这里取的，现在取不到了，当然就什么也不显示了。

Alaska_Lee 2015-08-01

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引用 3 楼 wi496481 的回复:

你要取的值在这里面 productList 怎么跑到Product这去取了？？

我是要遍历productList的每一项，当然要到Product里面取了

Alaska_Lee 2015-08-01

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引用 5 楼 u012791859 的回复:

<c:foreach> items属性没取到值吧

这个写法不对吗？书上是这么写的啊！

Alaska_Lee 2015-08-01

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引用 4 楼 u014431852 的回复:

product里面有没有get和set方法？

set get都有的

package com.smoothlybelt.been;

import java.sql.Time;

public class Product {
	private String productId;
	private String storeId;
	private Time publishTime;
	private int productType;
	private double minFreeCost;
	private int discountType;
	private String discount;
	private int productEvalute;
	private double productPrise;
	private int salesTotalVolume;
	private int salesMonthlyVolume;
	private int productState;
	public String getProductId() {
		return productId;
	}
	public void setProductId(String productId) {
		this.productId = productId;
	}
	public String getStoreId() {
		return storeId;
	}
	public void setStoreId(String storeId) {
		this.storeId = storeId;
	}
	public Time getPublishTime() {
		return publishTime;
	}
	public void setPublishTime(Time publishTime) {
		this.publishTime = publishTime;
	}
	public int getProductType() {
		return productType;
	}
	public void setProductType(int productType) {
		this.productType = productType;
	}
	public double getMinFreeCost() {
		return minFreeCost;
	}
	public void setMinFreeCost(double minFreeCost) {
		this.minFreeCost = minFreeCost;
	}
	public int getDiscountType() {
		return discountType;
	}
	public void setDiscountType(int discountType) {
		this.discountType = discountType;
	}
	public String getDiscount() {
		return discount;
	}
	public void setDiscount(String discount) {
		this.discount = discount;
	}
	public int getProductEvalute() {
		return productEvalute;
	}
	public void setProductEvalute(int productEvalute) {
		this.productEvalute = productEvalute;
	}
	public double getProductPrise() {
		return productPrise;
	}
	public void setProductPrise(double productPrise) {
		this.productPrise = productPrise;
	}
	public int getSalesTotalVolume() {
		return salesTotalVolume;
	}
	public void setSalesTotalVolume(int salesTotalVolume) {
		this.salesTotalVolume = salesTotalVolume;
	}
	public int getSalesMonthlyVolume() {
		return salesMonthlyVolume;
	}
	public void setSalesMonthlyVolume(int salesMonthlyVolume) {
		this.salesMonthlyVolume = salesMonthlyVolume;
	}
	public int getProductState() {
		return productState;
	}
	public void setProductState(int productState) {
		this.productState = productState;
	}
}

Alaska_Lee 2015-07-31