JAVA实现微信支付

1.微信支付官方文档微信官网链接
2.可以看到这些支付方式。

3.在此介绍公众号支付和app支付。后面的开发基本看下文档就没什么问题了。
4.开发之前需要准备前期公众。
5.首先需要申请公众号并且开通支付等设置一些配置东西，这里就不废话了。
6.代码如下：
一、公众号网页支付（H5调起支付）

package com.common.action;import java.io.BufferedOutputStream;import java.math.BigDecimal;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.SortedMap;import java.util.TreeMap;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import org.apache.struts2.ServletActionContext;import org.apache.struts2.convention.annotation.Namespace;import org.apache.struts2.convention.annotation.ParentPackage;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier;import com.common.util.PoUtil;import com.common.util.RequestUtil;import com.common.util.ResponseResultUtil;import com.common.util.ResultBeanUtil;import com.common.util.TokenUtil;import com.common.util.wx.WeixinPayUtil;import com.common.util.wx.XMLUtil;import com.frame.base.dto.Query;import com.frame.enums.DeletedStatus;import com.frame.enums.PlatformType;import com.opensymphony.xwork2.ActionSupport;import com.sfc.service.interfaces.ISfcFormOrderServiceCustom;@ParentPackage("struts-framework")@Namespace("/wxPayTools")@SuppressWarnings("all")public class WxPayToolsAction extends ActionSupport{    private static final long serialVersionUID = 4809391090975348475L;    private static final Log logger = LogFactory.getLog(WxPayToolsAction.class);    protected HttpServletRequest request = ServletActionContext.getRequest();    protected HttpServletResponse response = ServletActionContext.getResponse();    @Autowired    @Qualifier("tSysWxPayConfigCustomService")    private ITSysWxPayConfigServiceCustom tSysWxPayConfigCustomService;    @Autowired    @Qualifier("terminalUserService")    private ITerminalUserService terminalUserService;    /**     * 获取action类名     * @return     */    private String getActionName(){        return this.getClass().getSimpleName();    }    /**     * 微信公众号支付     */    public void wxPay(){        String methodName = "wxPay";        String message = "";        try{            String ecid = RequestUtil.getParameter(request, "ecid");        String orderNum = RequestUtil.getParameter(request, "orderNum");        String orderMoney = RequestUtil.getParameter(request, "orderMoney");        String userId = RequestUtil.getParameter(request, "userId");        String notifyUrl = RequestUtil.getParameter(request, "notifyUrl");        String body = RequestUtil.getParameter(request, "body");        String detail = RequestUtil.getParameter(request, "detail");        TSysWxPayConfigCustom wxPayConfigCustom =    tSysWxPayConfigCustomService.getTSysWxPayConfigCustom(ecid);        if(wxPayConfigCustom == null){            ResponseUtils.renderJsonObject(response, ResponseResultUtil.returnFailResult(ResultBeanUtil.MSG_FAIL, "查询配置信息为空");                return;        }        // 获取 prepayId        String prepayId= "";        Map<String, Object> mrsInfo = new HashMap<String, Object>();        SortedMap<String, String> wxInfo = new TreeMap<>();        wxInfo.put("orderNum",orderNum);        wxInfo.put("orderMoney",orderMoney);        wxInfo.put("body",body);        wxInfo.put("detail",detail);        Map<String, String> data = new HashMap<String,String>();        //微信公众号手机网页支付        TerminalUser terminalUser = terminalUserService.findObjById(userId);        if(terminalUser == null){            message =  "查询数据为空terminalUser="+terminalUser ;                ResponseUtils.renderJsonObject(response, ResponseResultUtil.returnFailResult(ResultBeanUtil.MSG_FAIL, message));                return;            }            String openId = terminalUser.getOpenId();            if(StringUtil.isEmptyOrNullStr(openId)){                ResponseUtils.renderJsonObject(response, ResponseResultUtil.returnFailResult(ResultBeanUtil.MSG_FAIL, "用户openid为空openId="+openId));                return;            }            wxInfo.put("openId", openId);            // 根据prepayId签名             prepayId = WeixinPayUtil.getWxJsPrepayId(request, response, wxInfo, wxPayConfigCustom,notifyUrl);             data = weixiPayUtil.createWxJsSignByPrepayId(request, response, prepayId, wxPayConfigCustom);             if (StringUtil.isEmptyOrNullStr(prepayId) || "-1".equals(prepayId)) {                message = methodName + " 方法 微信支付 ,微信公众号手机网页支付获取预支付 prepayId " + prepayId + " 有误！";                logger.error(message);                ResponseUtils.renderJsonObject(response,ResponseResultUtil.returnExceptionResult(ResultBeanUtil.MSG_EXCEPTION, message));                return;            }             mrsInfo.put("wxJsApi", data);             ResponseUtils.renderJsonObject(response, ResponseResultUtil.returnSuccResult(mrsInfo));        }catch(Exception e){            logger.error(getActionName() + "类的" + methodName + " 方法异常了exception=" + e.getMessage(), e);            e.printStackTrace();            ResponseUtils.renderJsonObject(response, ResponseResultUtil.returnExceptionResult(                    ResultBeanUtil.MSG_EXCEPTION, getActionName() + "类的" + methodName + " 方法异常了!"));        }    }   }package com.common.util.wx;import java.io.ByteArrayOutputStream;import java.io.InputStream;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.SortedMap;import java.util.TreeMap;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts2.ServletActionContext;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.xcx.util.Sign;/** * 微信支付工具类 * @ClassName: WeixiPayUtil  * @Description: 微信支付工具 * @author Administrator * @date 2017年4月28日 下午12:02:12  * */public class WeixinPayUtil {    private static Logger logger = LoggerFactory.getLogger(WeixinPayUtil.class);    public static final String RETURN_CODE_SUCC = "SUCCESS";    public static final String RETURN_CODE_FAIL = "FAIL";    public static final String JSAPI_PREPAY_ID = "jsapi_prepayId_";    public static final String APP_PREPAY_ID = "app_prepayId_";    protected static HttpServletRequest request = ServletActionContext.getRequest();    protected static HttpServletResponse response = ServletActionContext.getResponse();    public static SortedMap<String,String> getOrderInfoMap(Map<String, Object> mrsInfo,  List<Map<String, Object>> productList){        SortedMap<String,String> orderInfo = new TreeMap<String, String>();        orderInfo.put("userId", mrsInfo.get("userId").toString());        orderInfo.put("orderNum", mrsInfo.get("orderNum").toString());        orderInfo.put("orderMoney", mrsInfo.get("allMoney").toString());        String subject = "",body="";        int bookCount = 0;        if(productList!=null && productList.size()>0){            for (Map<String, Object> shopOrderDetail : productList) {                subject = subject + shopOrderDetail.get("productName") + " , ";                bookCount = bookCount + StrUtil.getIntValue(shopOrderDetail.get("productCount").toString());            }        }        if(subject.contains(",")){            if(subject.length()>25){                subject = subject.substring(0,25)+"......";            }             subject = subject.substring(0,subject.length()-3);// 去掉最后一个,号或者最后一个.号        }        body = "订单："+mrsInfo.get("orderNum")+" 共包含"+bookCount+"件商品。";        orderInfo.put("body", body);        orderInfo.put("detail", subject);        return orderInfo;    }    /**     * 获取JSAPI预支付ID     * @param request     * @param response     * @param orderInfo 包括字段orderNum，orderMoney(单位:分)，myNotifyUrl(自定义回调地址时,可空)，openId，detail(可空)，body     * @param wxPayConfigCustom     * @param selfNotifyUrl 自定义通知链接     * @return     */    public static String getWxJsPrepayId(HttpServletRequest request, HttpServletResponse response, Map<String,String> orderInfo, TSysWxPayConfigCustom wxPayConfigCustom, String selfNotifyUrl){        String methodName = "getWxJsPrepayId";        // 微信配置信息        String wxappId = wxPayConfigCustom.getPublicAppId();            // 公众号的唯一标识        String wxappSecret = wxPayConfigCustom.getPublicSecret();       // 微信公众平台应用APPSECRET        // 订单信息        String out_trade_no = orderInfo.get("orderNum");//订单号        logger.info("out_trade_no="+out_trade_no);        String prepayId = getJsapiPrepayIdRedis(out_trade_no);        if(!StringUtil.isEmpty(prepayId)){            return prepayId;        }        String orderMoney = orderInfo.get("orderMoney");        logger.info("orderMoney="+orderMoney);        // 调用公共支付接口传的自定义业务回调通知地址        String myNotifyUrl = orderInfo.get("myNotifyUrl");          // 金额转化为分为单位        float sessionmoney = Float.parseFloat(orderMoney);        String finalmoney = String.format("%.2f", sessionmoney);        String total_fee = Integer.parseInt(finalmoney.replace(".", "")) + "";        String detail = orderInfo.get("detail");        String openId = orderInfo.get("openId");        logger.info("openId="+openId);        // 商品描述        String body = orderInfo.get("body");        logger.info("body="+body);        if(StringUtil.isEmptyAnyOf(out_trade_no, orderMoney, body, openId)){            logger.info(getClassName()+"类 "+ methodName +"方法，orderNum,orderMoney,body,openId参数必须都不为空！");            return "-1";        }        // 商户相关资料         String wxpartner = wxPayConfigCustom.getPublicMchId();        String wxpartnerkey = wxPayConfigCustom.getPublicKey();        // 商户号        String mch_id = wxpartner;        // 随机数         String nonce_str = Sha1Util.getNonceStr();        //附加数据        String attach = getAttachKey(out_trade_no, myNotifyUrl);        // 订单生成的机器 IP        String spbill_create_ip = request.getRemoteAddr();        // 这里notify_url是 支付完成后微信发给该链接信息，可以判断会员是否支付成功，改变订单状态等。        String url = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath();        String notify_url = url;        if (StringUtil.isEmpty(selfNotifyUrl)) {            notify_url += WeixinConfig.notify_url;//支付调起的链接/weiXinPay/wei_xin_pay!payNotify.action        } else {            notify_url += selfNotifyUrl;        }         String trade_type = WeixinConfig.trade_type_jsapi;//填写JSAPI        SortedMap<String, String> packageParams = new TreeMap<String, String>();        packageParams.put("appid", wxappId);        packageParams.put("mch_id", mch_id);          packageParams.put("nonce_str", nonce_str);          packageParams.put("body", body);          if (StringUtil.isNotEmpty(detail)) {            packageParams.put("detail", detail);        }        packageParams.put("attach", attach);          packageParams.put("out_trade_no", out_trade_no);          packageParams.put("total_fee", total_fee);          packageParams.put("spbill_create_ip", spbill_create_ip);          packageParams.put("notify_url", notify_url);          packageParams.put("trade_type", trade_type);          packageParams.put("openid", openId);          RequestHandler reqHandler = new RequestHandler(request, response);        reqHandler.init(wxappId, wxappSecret, wxpartnerkey);        String sign = reqHandler.createSign(packageParams);        String xml="<xml>"+                "<appid>"+wxappId+"</appid>"+                "<mch_id>"+mch_id+"</mch_id>"+                "<nonce_str>"+nonce_str+"</nonce_str>"+                "<sign>"+sign+"</sign>"+                "<body><![CDATA["+body+"]]></body>";        if(StringUtil.isNotEmpty(detail)){            xml += "<detail><![CDATA["+detail+"]]></detail>";        }        xml += "<attach>"+attach+"</attach>"+            "<out_trade_no>"+out_trade_no+"</out_trade_no>"+            "<total_fee>"+total_fee+"</total_fee>"+            "<spbill_create_ip>"+spbill_create_ip+"</spbill_create_ip>"+            "<notify_url>"+notify_url+"</notify_url>"+            "<trade_type>"+trade_type+"</trade_type>"+            "<openid>"+openId+"</openid>"+            "</xml>";        logger.info(getClassName()+"类 "+ methodName +"方法，xml="+ xml);        String createOrderURL = WeixinConfig.prepay_url;        try {            prepayId = GetWxOrderno.getPayNo(createOrderURL, xml);            setJsapiPrepayIdRedis(out_trade_no, prepayId);            logger.info(getClassName()+"类 "+ methodName +"方法，生成 prepayId="+prepayId+"||orderNum="+out_trade_no);        } catch (Exception e) {            logger.error(getClassName()+"类 "+ methodName +"方法，生成 prepayId 出错了", e);            e.printStackTrace();        }        return prepayId;    }package com.shopn.util;import java.io.IOException;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.SortedMap;import java.util.TreeMap;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.params.HttpProtocolParams;import org.apache.http.util.EntityUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.common.model.TSysWxPayConfigCustom;import net.sf.json.JSONObject;public class weixiPayUtil {    private static Logger logger = LoggerFactory.getLogger(weixiPayUtil.class);//封装H5请求的参数public static Map<String,String> createWxJsSignByPrepayId(HttpServletRequest request, HttpServletResponse response, String prepayId,TSysWxPayConfigCustom wxPayConfigCustom){        String wxappid = WeixinpayConfig.wxappid;        String wxappsecret = WeixinpayConfig.wxappsecret;        String partnerkey = WeixinpayConfig.wxpartnerkey;        if(wxPayConfigCustom!=null){            if(!StringUtil.isEmptyOrNullStr(wxPayConfigCustom.getPublicAppId())){                wxappid = wxPayConfigCustom.getPublicAppId();                wxappsecret = wxPayConfigCustom.getPublicSecret();                partnerkey = wxPayConfigCustom.getPublicKey();            }        }        String noncestr = Sha1Util.getNonceStr();        String timeStamp = Sha1Util.getTimeStamp();        String signType = WeixinpayConfig.sign_type_md5;        String packageStr = "prepay_id="+prepayId;        SortedMap<String,String> params = new TreeMap<String,String>();        params.put("appId", wxappid);        params.put("timeStamp",timeStamp);        params.put("nonceStr", noncestr);        params.put("package", packageStr);        params.put("signType", signType);        //生成支付签名,这个签名 给 微信支付的调用使用        RequestHandler reqHandler = new RequestHandler(request, response);        reqHandler.init(wxappid, wxappsecret, partnerkey);        String paySign = reqHandler.createSign(params);         Map<String,String> map = new HashMap<String, String>();        map.put("appId", wxappid);        map.put("nonceStr", noncestr);        map.put("timeStamp", timeStamp);        map.put("signType", signType);        map.put("packageStr", packageStr);        map.put("paySign", paySign);        logger.info("createWxJsSignByPrepayId方法中生成 finalSign "+paySign);        return map;    }}}

生成微信公众号H5发起的支付参数，然后通前端H5调起支付就可以了。H5发起支付微信公众号链接

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