java实现在线支付-支付宝详解编程语言

/**     
     * 根据订单生成支付宝接口URL.     
     * @param httpRequest     
     * @param order 订单实例     
     * @return     
     * @throws Exception     
     */      
    public static String makeOrderAlipayUrl(HttpServletRequest httpRequest,Order order) throws Exception {       
        HashMap hm = new HashMap();       
        hm.put("_input_charset",httpRequest.getCharacterEncoding());//采用相同的编码方式       
        hm.put("body","您在www.xxx.com上的订单");//填写在跳到支付宝页面上显示的付款内容信息       
        hm.put("discount","-5");//填写折扣信息 -5表示抵扣5元       
        hm.put("logistics_fee","10");//物流费用       
        hm.put("logistics_payment","BUYER_PAY");//物流费用支付人 BUYER_PAY=买家支付物流费用       
        hm.put("logistics_type","EXPRESS");//物流方式       
        hm.put("notify_url","http://www.xxx.com/notifyurl.jsp");//客户付款后,支付宝调用的页面       
        hm.put("out_trade_no",order.getId());//外部交易号,最好具有唯一性,在获取支付宝发来的付款信息时使用.       
        hm.put("partner",partnerId);//partnerId(合作伙伴ID)       
        hm.put("agent",partnerId);//partnerId(合作伙伴ID)       
        hm.put("payment_type","1");//支付类型 1=商品购买,2=服务购买,...       
        hm.put("price","105.30");//订单金额信息       
        hm.put("quantity","1");//订单商品数量,一般都是写1,它是按照整个订单包来计算       
        hm.put("return_url","http://www.xxx.com/ReturnUrl.jsp");//客户付款成功后,显示给客户的页面       
        hm.put("seller_email","[email protected]");//你的支付宝账户email       
        hm.put("service","create_direct_pay_by_user");//create_direct_pay_by_user=直接付款,trade_create_by_buyer 担保付款        
        hm.put("subject","www.xxx.com的订单");//填写在跳到支付宝页面上显示的付款标题信息       
        String payGateway = "https://www.alipay.com/cooperate/gateway.do?";//跳转到支付宝的url头       
        return makeUrl(hm,securityCode,httpRequest.getCharacterEncoding(),payGateway);//securityCode(安全码)        
    }       
    /**     
     * 根据传入的参数生成alipay的支付URL     
     * @param hm 参数值     
     * @param securityCode 安全码     
     * @param charset 编码     
     * @param payGateway 支付宝gateway     
     * @return     
     */      
    public static String makeUrl(HashMap hm,String securityCode,String charset,String payGateway) throws Exception{       
        List keys = new ArrayList(hm.keySet());       
        Collections.sort(keys);//支付宝要求参数必须按字母排序       
        StringBuffer content = new StringBuffer();       
        for (int i = 0; i < keys.size(); i++) {       
            content.append((String) keys.get(i));       
            content.append("=");       
            content.append((String) hm.get((String) keys.get(i)));       
            if (i != keys.size() - 1) {       
                content.append("&");       
            }       
        }       
        content.append(securityCode);       
        String sign = md5(content.toString(),charset);       
        content.delete(0,content.length());       
        content.append(payGateway);       
        for (int i = 0; i < keys.size(); i++) {       
            content.append(keys.get(i));       
            content.append("=");       
            content.append(URLEncoder.encode((String) hm.get(keys.get(i)), charset));       
            content.append("&");       
        }       
        content.append("&sign_type=MD5");       
        keys.clear();       
        keys = null;       
        return content.toString();       
    }       
    /**     
     * 生成md5编码字符串.     
     * @param str 源字符串     
     * @param charset 编码方式     
     * @return     
     *     
     */      
    public static String md5(String str,String charset) {       
        if (str == null)       
            return null;       
        char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',       
                'a', 'b', 'c', 'd', 'e', 'f' };       
        MessageDigest md5MessageDigest = null;       
        byte[] md5Bytes = null;       
        char md5Chars[] = null;       
        byte[] strBytes = null;       
        try {       
            strBytes = str.getBytes(charset);       
            md5MessageDigest = MessageDigest.getInstance("MD5");       
            md5MessageDigest.update(strBytes);       
            md5Bytes = md5MessageDigest.digest();       
            int j = md5Bytes.length;       
            md5Chars = new char[j * 2];       
            int k = 0;       
            for (int i = 0; i < j; i++) {       
                byte md5Byte = md5Bytes;       
                md5Chars[k++] = hexDigits[md5Byte >>> 4 & 0xf];       
                md5Chars[k++] = hexDigits[md5Byte & 0xf];       
            }       
            return new String(md5Chars);       
        } catch (NoSuchAlgorithmException e) {       
            //Log.output(e.toString(), Log.STD_ERR);       
            return null;       
        } catch (UnsupportedEncodingException e) {       
            //Log.output(e.toString(), Log.STD_ERR);       
            return null;       
        } finally {       
            md5MessageDigest = null;       
            strBytes = null;       
            md5Bytes = null;       
        }       
    }   

<%@ page contentType="text/html;charset=UTF-8"%><%@ page import="com.soft4j.AlipayMgr"%><%       
    String ret = AlipayMgr.insert(request);       
    if(ret==null){       
        out.print("success");//成功接收支付宝发来的付款信息       
    }else{       
        out.print("fail");//出错       
    }       
%> 

/*     
 * Created on 2005-6-12     
 * Author stephen     
 * Email zhoujianqiang AT gmail DOT com     
 * CopyRight(C)2005-2008 , All rights reserved.     
 */      
package com.soft4j;       
import java.sql.Connection;       
import java.sql.SQLException;       
import java.util.Enumeration;       
import java.util.Vector;       
import javax.servlet.http.HttpServletRequest;       
/**     
 * 支付宝付款通知接口.     
 *      
 * @author stephen     
 * @version 1.0.0     
 */      
public final class NotifyUrlMgr {       
    public static String insert(HttpServletRequest httpRequest) {       
        //定义变量和进行必要的初始化工作       
        Enumeration parameterNames = null;       
        String parameterName = null;       
        String parameterValue = null;       
        int count = 0;       
        Vector[] params = null;       
        Vector vParameterName = new Vector();       
        Vector vParameterValue = new Vector();       
        try {       
            String orderId = httpRequest.getParameter("out_trade_no");//订单号       
            if(orderId==null||"".equals(orderId)) orderId="-1";       
            parameterNames = httpRequest.getParameterNames();       
            boolean isPrint = false;       
            while (parameterNames.hasMoreElements()) {//循环收取支付宝发来的所有参数信息       
                parameterName = (String) parameterNames.nextElement();       
                parameterValue = httpRequest.getParameter(parameterName);       
                if(parameterValue==null) parameterValue="";       
                vParameterName.add(parameterName);       
                vParameterValue.add(parameterValue);       
                count++;       
            }       
            //这里添加对收到信息的处理:一般是将这些信息存入数据库,然后对客户的订单进行处理.       
            return null;       
        } catch (Exception e) {       
            return e.toString();       
        } finally {        
        }       
    }       
}