亚洲精品麻豆av,亚洲成av人片不卡无码,久久久国产精品亚洲一区

電子商務(wù)系統(tǒng)的一些代碼

（一）、經(jīng)常用的過濾器

package com.ascent.util;
2

import java.io.IOException;
4

import javax.servlet.Filter;
5

import javax.servlet.FilterChain;
6

import javax.servlet.FilterConfig;
7

import javax.servlet.ServletException;
8

import javax.servlet.ServletRequest;
9

import javax.servlet.ServletResponse;
10

import javax.servlet.UnavailableException;
11

/**
13

* Example filter that sets the character encoding to be used in parsing the
14

* incoming request
15

*/
16

public class SetCharacterEncodingFilter implements Filter {
17

/**
19

* Take this filter out of service.
20

*/
21

public void destroy() {
22

}
23

/**
24

* Select and set (if specified) the character encoding to be used to
25

* interpret request parameters for this request.
26

*/
27

public void doFilter(ServletRequest request, ServletResponse response,
28

FilterChain chain)throws IOException, ServletException {
29

request.setCharacterEncoding("gb2312");
31

// 傳遞控制到下一個過濾器
33

chain.doFilter(request, response);
34

}
35

public void init(FilterConfig filterConfig) throws ServletException {
37

}
38

}
39

（二）、購物車類代碼

package com.ascent.util;

import java.util.HashMap;

import com.ascent.po.Product;

public class ShopCart {

private HashMap<String, Product> hashMap;

public HashMap<String, Product> getHashMap() {

return hashMap;

}

public void setHashMap(HashMap<String, Product> hashMap) {

this.hashMap = hashMap;

}

@SuppressWarnings("unchecked")

public ShopCart(){

hashMap = new HashMap();

}

/**

* 檢查hashmap中是否有了該pid對應(yīng)的對象方法

* @param pid

* @return true：有 false：無

public boolean checkPid(String pid){

if(hashMap.containsKey(pid)){

return true;

}else{

return false;

}

/**

* 在上面方法返回false情況下添加product

* @param pid

* @param product

public void addProduct(String pid,Product product){

hashMap.put(pid, product);

}

/**

* 根據(jù)id刪除hashmap中的product

* @param pid

public void delProduct(String pid){

hashMap.remove(pid);

}

/**

* 修改hashmap中pid對應(yīng)product的質(zhì)量quantity

* @param pid

* @param quantity

public void updateQuantity(String pid,String quantity){

hashMap.get(pid).setQuantity(quantity);

}

/**

* 清除購物車

public void emptyCart(){

this.getHashMap().clear();

}

（三）、分頁算法

//分頁類

package com.ascent.util;

import java.util.*;

/**

* @author Administrator

* @version 負(fù)責(zé)頁面控制的 JavaBean

public class PageBean {

public int currentPage; // 當(dāng)前頁數(shù)

public int totalPage; // 總頁數(shù)

public int totalRows; // 總行數(shù)

public int rowsPage = 5; // 每頁顯示多少行

public ArrayList data; // 封裝頁面顯示的數(shù)據(jù)

public PageBean(){}

public void countTotalPage(){ // 計算總頁數(shù)

if(totalRows%rowsPage==0){

this.totalPage = totalRows/rowsPage;

}

else{

this.totalPage = totalRows/rowsPage + 1;

}

public ArrayList getData(){

return data;

}

public PageBean(int totalRows){

this.totalRows = totalRows;

this.countTotalPage();

}

// 分頁算法

public String guestPageShow() throws Exception {

this.pageReturn();

return "guestproductsshow";

}

@SuppressWarnings("unchecked")

private void pageReturn() {

String jump_page = this.getJumpPage();

if (jump_page == null) {

jump_page = "1";

}

PageBean page = this.listData(jump_page);

ActionContext.getContext().getSession().put("product_page_list", page);

this.setDataList(page.getData());

}

public PageBean listData(String number) {

PageBean page = new PageBean(productService.getTotalRows());

int num = Integer.parseInt(number);

String sql = "from Product p where delFlag=0 order by p.pid";

page.data = productService.getData(sql, page.rowsPage * (num - 1),

page.rowsPage);

page.currentPage = num;

return page;

}

// 分頁算法

//實現(xiàn)

PageBean page=this.listData("1");

ActionContext.getContext().getSession().put("productuser_page_list", page);

this.setDataList(page.getData());

//jsp方面

PageBean pBean = (PageBean)session.getAttribute("productuser_page_list");

if(pBean.totalPage!=1){

<%@ include file="page.jsp" %>

</form>

<%} %>

//page.jsp

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>

function Jumping(){

document.pageForm.submit();

}

function gotoPage(pagenum){

//alert(pagenum);

//alert(document.pageForm.jumpPage.value);

document.pageForm.jumpPage.value = pagenum;

document.pageForm.submit();

}

</script>

<table>

<tr>

<td>

<%if(pBean.currentPage==1){out.print("首頁　上一頁");}else{%>

}

<%if(pBean.currentPage==pBean.totalPage){out.print("下一頁　尾頁");}else{%>

<%} %>

</td>

<td>

轉(zhuǎn)到第<select name="jumpPage" onchange="Jumping()">

<%for(int i=1;i<=pBean.totalPage;i++){

if(i==pBean.currentPage){

}

else

{

}

</select>頁

</td>

</tr>

</table>

這個ssh項目的配置文件

posted on 2009-03-13 17:16 jimphei 閱讀(230) 評論(1) 編輯收藏

jimphei學(xué)習(xí)工作室

常用鏈接

留言簿(2)

隨筆檔案

搜索

最新評論

閱讀排行榜

評論排行榜

評論


只有注冊用戶登錄后才能發(fā)表評論。




網(wǎng)站導(dǎo)航: 博客園 IT新聞 Chat2DB C++博客博問管理