package?action;

import?java.awt.image.BufferedImage;
import?java.io.BufferedOutputStream;
import?java.io.BufferedReader;
import?java.io.IOException;
import?java.io.InputStream;
import?java.io.InputStreamReader;
import?java.util.HashMap;
import?java.util.Iterator;
import?java.util.Map;
import?java.util.Random;
import?java.util.SortedMap;
import?java.util.TreeMap;

import?javax.imageio.ImageIO;
import?javax.servlet.ServletException;
import?javax.servlet.annotation.WebServlet;
import?javax.servlet.http.HttpServlet;
import?javax.servlet.http.HttpServletRequest;
import?javax.servlet.http.HttpServletResponse;

import?util.PayConfig;
import?util.PayUtil;
import?util.RandomUtil;
import?util.SignUtil;
import?util.xmlUtil;
import?util.ZxingUtil;


@WebServlet（“/payment/*“）
public?class?PayServlet?extends?HttpServlet?{
	private?static?final?long?serialVersionUID?=?1L;
	
	protected?void?doGet（HttpServletRequest?request?HttpServletResponse?response）?throws?ServletException?IOException?{
		doPost（request?response）;
	}

	
	protected?void?doPost（HttpServletRequest?request?HttpServletResponse?response）?throws?ServletException?IOException?{
		request.setCharacterEncoding（“UTF-8“）;
		
		String?requestURI=request.getRequestURI（）;//獲取請求路徑
		int?start?=?requestURI.lastIndexOf（“/“）;
		String?reqStr=requestURI.substring（start?+?1）;
		
		if（“pay“.equals（reqStr））{
			doPay（requestresponse）;
		}else?if（“image“.equals（reqStr））{
			doImage（requestresponse）;
		}else?if（“result“.equals（reqStr））{
			try?{
				wxNotify（requestresponse）;
			}?catch?（Exception?e）?{
				System.err.println（“通知出錯了:“+e）;
			}
		}
		
	}


	private?void?doPay（HttpServletRequest?request?HttpServletResponse?response）?{
		
		String?body=“支付測試“;??//商品描述
		String?total_fee=“1“;?//商品價格默認單位為“分”
		String?out_trade_no=RandomUtil.createOrderId（4）;?//商品訂單號
		try?{
			//獲取二維碼字符串
			String?result=PayUtil.getPayURL（?body?out_trade_no??total_fee?）;
			//將字符串轉換為二維碼
			BufferedImage?image?=?ZxingUtil.createImage（result?300?300）;
			
			//將二維碼放到session里
			request.getSession（）.setAttribute（“image“?image）;
			//將訂單號放到session里
			request.getSession（）.setAttribute（“out_trade_no“?out_trade_no）;
			
			//跳轉頁面
			response.sendRedirect（“../ercode.jsp“）;
			
		}?catch?（Exception?e）?{
			e.printStackTrace（）;
		}
		
	}
	
	private?void?doImage（HttpServletRequest?request?HttpServletResponse?response）?throws?IOException?{
		System.out.println（“進來了...“）;
		?BufferedImage?image?=?（BufferedImage）?request.getSession（）.getAttribute（“image“）;
	????????if?（image?!=?null）?{
	????????????ImageIO.write（image“JPEG“response.getOutputStream（））;
	????????}
	}
	
	
	?/**
?????*?解析微信返回的支付結果
?????*?@param?request
?????*?@param?response
?????*?@throws?Exception
?????*/
????public?void?wxNotify（HttpServletRequest?requestHttpServletResponse?response）?throws?Exception{
????????//讀取參數
????????InputStream?inputStream?;
????????StringB