java微信扫码支付Native（模式二）
官方开发文档模式二的地址：https://pay.weixin.qq.com/wiki/doc/api/native.php?chapter=6_5
pom文件的依赖：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.wky</groupId>
<artifactId>wechat</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>wechat</name>
<description>Demo project for Spring Boot</description> <properties>
<java.version>1.8</java.version>
</properties> <dependencies> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency> <!--微信扫码支付所需要的依赖-->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>net.sf.ezmorph</groupId>
<artifactId>ezmorph</artifactId>
<version>1.0.6</version>
</dependency>
<!--jsp-->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency> <dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.2.3</version>
<classifier>jdk15</classifier><!-- 指定jdk版本 -->
</dependency>
<dependency>
<groupId>com.github.wxpay</groupId>
<artifactId>wxpay-sdk</artifactId>
<version>0.0.3</version>
</dependency>
<!-- fastjson-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.24</version>
</dependency> <!-- gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.2</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.thoughtworks.xstream</groupId>
<artifactId>xstream</artifactId>
<version>1.4.4</version>
</dependency>
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.0</version>
</dependency> <dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>org.jdom</groupId>
<artifactId>jdom</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>com.orhanobut</groupId>
<artifactId>logger</artifactId>
<version>1.14</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.25</version>
<scope>test</scope>
</dependency>
<!--屏蔽自带的tomcat-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.4</version>
</dependency> </dependencies> <build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build> </project>
PayCommonUtil.java 微信支付常用方法
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;
}
}
XMLUtil.java 将支付参数转换为xml格式
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.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.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();
}
}
HttpUtil.java 用http连接提交支付信息参数
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.commons.logging.Log;
import org.apache.commons.logging.LogFactory; public class HttpUtil
{
private static final Log logger = LogFactory.getLog("org.apache.catalina.tribes.MESSAGES" ); 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));
System.out.println(reader.toString());
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line);
sb.append("\r\n");
}
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.java md5加密
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" };
}
GetWeixinUrlUtil.java 获取订单生成的二维码URL
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap; public class GetWeixinUrlUtil
{
//获取二维码url
public static String weixin_pay(String ip, VcWeixinPay vcWeixinPay) throws Exception {
// 账号信息
String appid = PayConfigUtil.APP_ID; // appid
String mch_id = PayConfigUtil.MCH_ID; // 商户号
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;
int order_price = 1; // 商品价格 注意：价格的单位是分
String body = "商品名称"; // 商品名称
String out_trade_no = PayCommonUtil.getCurrTime() + PayCommonUtil.buildRandom(4); // 商户订单号
// 获取发起电脑 ip
String spbill_create_ip = ip;
// 回调接口
String notify_url = PayConfigUtil.NOTIFY_URL;
String trade_type = "NATIVE"; //交易类型
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", String.valueOf(order_price));
packageParams.put("spbill_create_ip", spbill_create_ip);
packageParams.put("notify_url", notify_url);
packageParams.put("trade_type", trade_type);
//生成签名
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 urlCode = (String) map.get("code_url"); return urlCode;
} // 特殊字符处理
public static String UrlEncode(String src) throws UnsupportedEncodingException {
return URLEncoder.encode(src, "UTF-8").replace("+", "%20");
}
}
PayConfigUtil.java 微信支付参数
import javax.servlet.http.HttpServletRequest; public class PayConfigUtil
{
public static final String APP_ID = "";//微信开发平台应用ID(公众号ID)
public static final String MCH_ID = "";//商户号(商户号ID)
public static final String API_KEY = "";//API key(商户号里面的)
public static final String CREATE_IP = "";//发起支付的ip
public static final String NOTIFY_URL = "";//回调地址
public static final String UFDODER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder";//微信统一下单接口
public static final String APP_SECRET = "";//应用对应的凭证(在公众号里面) //获取ip
public static String getIP(HttpServletRequest request)
{
String ip = request.getRemoteAddr();
return ip;
}
支付回调方法
public void weixin_notify(HttpServletRequest request,HttpServletResponse response) throws Exception
{
System.out.println("调用回调方法");
//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.info(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");
String cash_fee_s = (String) packageParams.get("cash_fee");
String cash_fee = String.valueOf(Integer.parseInt(cash_fee_s) / 100);
String time_end = MctsUtils.numberDateToDate((String) packageParams.get("time_end"));
String transaction_id = (String) packageParams.get("transaction_id"); //////////执行自己的业务逻辑（报存订单信息到数据库）////////////////
System.out.println("支付成功 ,处理业务成功");
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> ";
//------------------------------
//处理业务完毕
//------------------------------
//向微信服务器发送确认信息，若不发送，微信服务器会间隔不同的时间调用回调方法
BufferedOutputStream out = new BufferedOutputStream(
response.getOutputStream());
out.write(resXml.getBytes());
out.flush();
out.close();
System.out.println("通知微信.异步确认成功");
} 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> "; BufferedOutputStream out = new BufferedOutputStream(
response.getOutputStream());
out.write(resXml.getBytes());
out.flush();
out.close();
System.out.println("执行回调函数失败");
}
} else{
logger.info("通知签名验证失败");
}
}
@RequestMapping(value="/image",method = RequestMethod.GET)
public void payWexin(@RequestParam String ip, HttpServletResponse response)throws Exception{
String url=GetWeixinUrlUtil.weixin_pay(ip);
GetWeixinUrlUtil.encodeQrcode(url,response);
根据GetWeixinUrlUtil.java获取到微信支付订单信息的二维码url，下载一个解析二维码的js插件（jquery.qrcode.min.js），把获取到二维码url在前端页面用jquery.qrcode.min.js解析，就能显示二维码了。
前端页面简略代码：
<script type="text/javascript" src="js/jquery.qrcode.min.js"></script>
<script language="javascript">
$(function(){
var codeUrl = ${erWeiMa};//erWeiMa是后端传的二维码url
$("#code").qrcode({
render: "canvas", //table方式
width: 240, //宽度
height:240, //高度
text: codeUrl //任意内容
});
});
</script> <div id="code" style="width: 240px;height: 240px;margin: 0px auto;"></div>
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