调用微信接口,模式二

工具类

HttpUtil：

package com.rongzhong.utils.weixin;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;

import org.apache.log4j.Logger;

public class HttpUtil {

    private static final Logger logger = Logger.getLogger(HttpUtil.class);
    private final static int CONNECT_TIMEOUT = 5000; // in milliseconds
    private final static String DEFAULT_ENCODING = "UTF-8";

    public static String postData(String urlStr, String data) {
        return postData(urlStr, data, null);
    }

    public static String postData(String urlStr, String data, String contentType) {
        BufferedReader reader = null;
        try {
            URL url = new URL(urlStr);
            URLConnection conn = url.openConnection();
            conn.setDoOutput(true);
            conn.setConnectTimeout(CONNECT_TIMEOUT);
            conn.setReadTimeout(CONNECT_TIMEOUT);
            if (contentType != null)
                conn.setRequestProperty("content-type", contentType);
            OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream(), DEFAULT_ENCODING);
            if (data == null)
                data = "";
            writer.write(data);
            writer.flush();
            writer.close();

            reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), DEFAULT_ENCODING));
            StringBuilder sb = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line);
                sb.append(" ");
            }
            return sb.toString();
        } catch (IOException e) {
            logger.error("Error connecting to " + urlStr + ": " + e.getMessage());
        } finally {
            try {
                if (reader != null)
                    reader.close();
            } catch (IOException e) {
            }
        }
        return null;
    }

}

===================================================

MD5Util：

package com.rongzhong.utils.weixin;

import java.security.MessageDigest;

public class MD5Util {
    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));

        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString;
    }

    private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d",
            "e", "f" };

}
====================================================================

PayCommonUtil：

package com.rongzhong.utils.weixin;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;

public class PayCommonUtil {

    /**
     * 是否签名正确,规则是:按参数名称a-z排序,遇到空值的参数不参加签名。
     *
     * @return boolean
     */
    public static boolean isTenpaySign(String characterEncoding, SortedMap<Object, Object> packageParams,
            String API_KEY) {
        StringBuffer sb = new StringBuffer();
        Set es = packageParams.entrySet();
        Iterator it = es.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String k = (String) entry.getKey();
            String v = (String) entry.getValue();
            if (!"sign".equals(k) && null != v && !"".equals(v)) {
                sb.append(k + "=" + v + "&");
            }
        }

        sb.append("key=" + API_KEY);

        // 算出摘要
        String mysign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toLowerCase();
        String tenpaySign = ((String) packageParams.get("sign")).toLowerCase();

        // System.out.println(tenpaySign + " " + mysign);
        return tenpaySign.equals(mysign);
    }

    /**
     * @author
     * @date 2016-4-22
     * @Description：sign签名
     * @param characterEncoding
     *            编码格式
     * @param parameters
     *            请求参数
     * @return
     */
    public static String createSign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) {
        StringBuffer sb = new StringBuffer();
        Set es = packageParams.entrySet();
        Iterator it = es.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String k = (String) entry.getKey();
            String v = (String) entry.getValue();
            if (null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) {
                sb.append(k + "=" + v + "&");
            }
        }
        sb.append("key=" + API_KEY);
        String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
        return sign;
    }

    /**
     * @author
     * @date 2016-4-22
     * @Description：将请求参数转换为xml格式的string
     * @param parameters
     *            请求参数
     * @return
     */
    public static String getRequestXml(SortedMap<Object, Object> parameters) {
        StringBuffer sb = new StringBuffer();
        sb.append("<xml>");
        Set es = parameters.entrySet();
        Iterator it = es.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String k = (String) entry.getKey();
            String v = (String) entry.getValue();
            if ("attach".equalsIgnoreCase(k) || "body".equalsIgnoreCase(k) || "sign".equalsIgnoreCase(k)) {
                sb.append("<" + k + ">" + "<![CDATA[" + v + "]]></" + k + ">");
            } else {
                sb.append("<" + k + ">" + v + "</" + k + ">");
            }
        }
        sb.append("</xml>");
        return sb.toString();
    }

    /**
     * 取出一个指定长度大小的随机正整数.
     *
     * @param length
     *            int 设定所取出随机数的长度。length小于11
     * @return int 返回生成的随机数。
     */
    public static int buildRandom(int length) {
        int num = 1;
        double random = Math.random();
        if (random < 0.1) {
            random = random + 0.1;
        }
        for (int i = 0; i < length; i++) {
            num = num * 10;
        }
        return (int) ((random * num));
    }

    /**
     * 获取当前时间 yyyyMMddHHmmss
     *
     * @return String
     */
    public static String getCurrTime() {
        Date now = new Date();
        SimpleDateFormat outFormat = new SimpleDateFormat("yyyyMMddHHmmss");
        String s = outFormat.format(now);
        return s;
    }

}
========================================================

package com.rongzhong.utils.weixin;

import java.net.InetAddress;
import java.net.UnknownHostException;

public class PayConfigUtil {
    //以下相关参数需要根据自己实际情况进行配置
    public static String APP_ID = "";// appid
    public static String APP_SECRET = "";// appsecret
    public static String MCH_ID = "";// 你的商业号
    public static String API_KEY = "";// API key
    public String CREATE_IP="";// APP和网页支付提交用户端ip，Native支付填调用微信支付API的机器IP。
    public static String UFDODER_URL = "";//微信统一下单接口
    public static String NOTIFY_URL = "";//回调地址(微信里配置)
    public PayConfigUtil() throws UnknownHostException{
        InetAddress ip = InetAddress.getLocalHost();
        this.CREATE_IP=ip.getHostAddress();
    }
}

========================================================

XMLUtil：

package com.rongzhong.utils.weixin;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;

public class XMLUtil {

     /**
     * 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。
     * @param strxml
     * @return
     * @throws JDOMException
     * @throws IOException
     */  
    public static Map doXMLParse(String strxml) throws JDOMException, IOException {  
        strxml = strxml.replaceFirst("encoding=".*"", "encoding="UTF-8"");  
 
        if(null == strxml || "".equals(strxml)) {  
            return null;  
        }  
          
        Map m = new HashMap();  
          
        InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));  
        SAXBuilder builder = new SAXBuilder();  
        Document doc = builder.build(in);  
        Element root = doc.getRootElement();  
        List list = root.getChildren();  
        Iterator it = list.iterator();  
        while(it.hasNext()) {  
            Element e = (Element) it.next();  
            String k = e.getName();  
            String v = "";  
            List children = e.getChildren();  
            if(children.isEmpty()) {  
                v = e.getTextNormalize();  
            } else {  
                v = XMLUtil.getChildrenText(children);  
            }  
              
            m.put(k, v);  
        }  
          
        //关闭流  
        in.close();  
          
        return m;  
    }  
      
    /**
     * 获取子结点的xml
     * @param children
     * @return String
     */  
    public static String getChildrenText(List children) {  
        StringBuffer sb = new StringBuffer();  
        if(!children.isEmpty()) {  
            Iterator it = children.iterator();  
            while(it.hasNext()) {  
                Element e = (Element) it.next();  
                String name = e.getName();  
                String value = e.getTextNormalize();  
                List list = e.getChildren();  
                sb.append("<" + name + ">");  
                if(!list.isEmpty()) {  
                    sb.append(XMLUtil.getChildrenText(list));  
                }  
                sb.append(value);  
                sb.append("</" + name + ">");  
            }  
        }  
          
        return sb.toString();  
    }  
      
    
}
========================================================

展示在页面：

生成二维码在页面

package com.rongzhong.service.draw;

import java.awt.image.BufferedImage;
import java.io.IOException;

import com.google.zxing.WriterException;

public interface QRCodeService {

    public BufferedImage createQRCode(final String url) throws WriterException, IOException;
    
}

package com.rongzhong.service.impl.drawImpl;

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

import org.springframework.stereotype.Service;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.rongzhong.service.draw.QRCodeService;

@Service
public class QRCodeServiceImpl implements QRCodeService {

    public BufferedImage createQRCode(String url) throws WriterException, IOException {
        
        BufferedImage image = null;  
        //二维码图片输出流  
        OutputStream out = null;  
        MultiFormatWriter multiFormatWriter = new MultiFormatWriter();  
        Map hints = new HashMap();  
        // 设置编码方式  
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");  
        // 设置QR二维码的纠错级别（H为最高级别）具体级别信息  
        /*hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);*/  
        BitMatrix bitMatrix = multiFormatWriter.encode(url, BarcodeFormat.QR_CODE, 400, 400,hints);  
        bitMatrix = updateBit(bitMatrix,10);  
        image = MatrixToImageWriter.toBufferedImage(bitMatrix);  
        return image;  
    }
    
     /**  
     * 自定义白边边框宽度  
     *  
     * @param matrix  
     * @param margin  
     * @return  
     */  
    private static BitMatrix updateBit(final BitMatrix matrix, final int margin) {  
        int tempM = margin * 2;  
        //获取二维码图案的属性  
        int[] rec = matrix.getEnclosingRectangle();  
        int resWidth = rec[2] + tempM;  
        int resHeight = rec[3] + tempM;  
        // 按照自定义边框生成新的BitMatrix  
        BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);  
        resMatrix.clear();  
        //循环，将二维码图案绘制到新的bitMatrix中  
        for (int i = margin; i < resWidth - margin; i++) {  
            for (int j = margin; j < resHeight - margin; j++) {  
                if (matrix.get(i - margin + rec[0], j - margin + rec[1])) {  
                    resMatrix.set(i, j);  
                }  
            }  
        }  
        return resMatrix;  
    }

}
========================================================

package com.rongzhong.controller;

import java.awt.image.BufferedImage;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.rongzhong.service.draw.QRCodeService;
import com.rongzhong.utils.weixin.HttpUtil;
import com.rongzhong.utils.weixin.PayCommonUtil;
import com.rongzhong.utils.weixin.PayConfigUtil;
import com.rongzhong.utils.weixin.XMLUtil;

@Controller
@RequestMapping
public class WxPayController {
    
    private static final Logger logger = Logger.getLogger(WxPayController.class);
    
    @Autowired
    private QRCodeService qrCodeService;
    
    @RequestMapping("/WXQRcode")
    public void getQRCode(Model m,HttpServletRequest request,HttpServletResponse response){
        //二维码图片输出流  
        OutputStream out = null;  
        try{  
            response.setContentType("image/jpeg;charset=UTF-8");  
            BufferedImage image = qrCodeService.createQRCode(WxPayController.weixin_pay_URL());  
            //实例化输出流对象  
            out = response.getOutputStream();  
            //画图  
            ImageIO.write(image, "png", response.getOutputStream());  
            out.flush();  
            out.close();  
        }catch (Exception e){  
            logger.error("生成二维码出现异常"+e);  
        }finally {  
            try{  
                if (null != response.getOutputStream()) {  
                    response.getOutputStream().close();  
                }  
                if (null != out) {  
                    out.close();  
                }  
            }catch(Exception e){  
                e.printStackTrace();  
            }  
        }  
    }
    
    
    /**
     * 生成二维码的链接
     * @return
     * @throws Exception
     */
    public static String weixin_pay_URL() throws Exception {  
        // 账号信息  
        String appid = PayConfigUtil.APP_ID;  // appid  
        //String appsecret = PayConfigUtil.APP_SECRET; // appsecret  
        String mch_id = PayConfigUtil.MCH_ID; // 商业号  
        String key = PayConfigUtil.API_KEY; // key  
 
        String currTime = PayCommonUtil.getCurrTime();  
        String strTime = currTime.substring(8, currTime.length());  
        String strRandom = PayCommonUtil.buildRandom(4) + "";  
        String nonce_str = strTime + strRandom;  
          
        String order_price = ""; // 价格   注意：价格的单位是分  
        String body = "";   // 商品名称  
        String out_trade_no = ""; // 订单号  
          
        // 获取发起电脑 ip  
        PayConfigUtil payConfig=new PayConfigUtil();
        String spbill_create_ip = payConfig.CREATE_IP;  
        // 回调接口   
        String notify_url = PayConfigUtil.NOTIFY_URL;  
        String trade_type = "NATIVE";  
          
        SortedMap<Object,Object> packageParams = new TreeMap<Object,Object>();  
        packageParams.put("appid", appid);  
        packageParams.put("mch_id", mch_id);  
        packageParams.put("nonce_str", nonce_str);  
        packageParams.put("body", body);  
        packageParams.put("out_trade_no", out_trade_no);  
        packageParams.put("total_fee", order_price);  
        packageParams.put("spbill_create_ip", spbill_create_ip);  
        packageParams.put("notify_url", notify_url);  
        packageParams.put("trade_type", trade_type);  
 
        String sign = PayCommonUtil.createSign("UTF-8", packageParams,key);  
        packageParams.put("sign", sign);  
          
        String requestXML = PayCommonUtil.getRequestXml(packageParams);  
        System.out.println(requestXML);  
   
        String resXml = HttpUtil.postData(PayConfigUtil.UFDODER_URL, requestXML);  
 
          
        Map map = XMLUtil.doXMLParse(resXml);  
        //String return_code = (String) map.get("return_code");  
        //String prepay_id = (String) map.get("prepay_id");  
        String urlCode = (String) map.get("code_url");  
        if(StringUtils.isEmpty(urlCode)){
            urlCode="";  
        }
        return urlCode;  
   }
    
    public static void main(String[] args) throws Exception {
        WxPayController wc=new WxPayController();
        System.out.println("weixin_generate_url:"+wc.weixin_pay_URL());
    }
    

    // 特殊字符处理  
    public static String UrlEncode(String src)  throws UnsupportedEncodingException {  
        return URLEncoder.encode(src, "UTF-8").replace("+", "%20");  
    }
    
    /**
     * 响应回调
     * @param request
     * @param response
     * @throws Exception
     */
    @RequestMapping("/WXQRcodeMessage")
    public void weixin_notify(HttpServletRequest request,HttpServletResponse response) throws Exception{  
        
        //读取参数  
        InputStream inputStream ;  
        StringBuffer sb = new StringBuffer();  
        inputStream = request.getInputStream();  
        String s ;  
        BufferedReader in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));  
        while ((s = in.readLine()) != null){  
            sb.append(s);  
        }  
        in.close();  
        inputStream.close();  
 
        //解析xml成map  
        Map<String, String> m = new HashMap<String, String>();  
        m = XMLUtil.doXMLParse(sb.toString());  
          
        //过滤空 设置 TreeMap  
        SortedMap<Object,Object> packageParams = new TreeMap<Object,Object>();        
        Iterator it = m.keySet().iterator();  
        while (it.hasNext()) {  
            String parameter = (String) it.next();  
            String parameterValue = m.get(parameter);  
              
            String v = "";  
            if(null != parameterValue) {  
                v = parameterValue.trim();  
            }  
            packageParams.put(parameter, v);  
        }  
          
        // 账号信息  
        String key = PayConfigUtil.API_KEY; // key  
 
        logger.error(packageParams);  
        //判断签名是否正确  
        if(PayCommonUtil.isTenpaySign("UTF-8", packageParams,key)) {  
            //------------------------------  
            //处理业务开始  
            //------------------------------  
            String resXml = "";  
            if("SUCCESS".equals((String)packageParams.get("result_code"))){  
                // 这里是支付成功  
                //////////执行自己的业务逻辑////////////////  
                String mch_id = (String)packageParams.get("mch_id");  
                String openid = (String)packageParams.get("openid");  
                String is_subscribe = (String)packageParams.get("is_subscribe");  
                String out_trade_no = (String)packageParams.get("out_trade_no");  
                  
                String total_fee = (String)packageParams.get("total_fee");  
                  
                logger.info("mch_id:"+mch_id);  
                logger.info("openid:"+openid);  
                logger.info("is_subscribe:"+is_subscribe);  
                logger.info("out_trade_no:"+out_trade_no);  
                logger.info("total_fee:"+total_fee);  
                  
                //////////执行自己的业务逻辑////////////////  
                  
                logger.info("支付成功");  
                //通知微信.异步确认成功.必写.不然会一直通知后台.八次之后就认为交易失败了.  
                resXml = "<xml>" + "<return_code><![CDATA[SUCCESS]]></return_code>"  
                        + "<return_msg><![CDATA[OK]]></return_msg>" + "</xml> ";  
                  
            } else {  
                logger.info("支付失败,错误信息：" + packageParams.get("err_code"));  
                resXml = "<xml>" + "<return_code><![CDATA[FAIL]]></return_code>"  
                        + "<return_msg><![CDATA[报文为空]]></return_msg>" + "</xml> ";  
            }  
            //------------------------------  
            //处理业务完毕  
            //------------------------------  
            BufferedOutputStream out = new BufferedOutputStream(  
                    response.getOutputStream());  
            out.write(resXml.getBytes());  
            out.flush();  
            out.close();  
        } else{  
            logger.info("通知签名验证失败");  
        }  
          
    }  
    
}