html页面选择微信支付后，超链接请求后台wxPayment()方法，例如链接请求：

location.href="../wxPayment?userName="+userName+"&phone="+phone+"&orderAmount="+orderAmount;

后台接收并处理如下：

第一步：public void wxPayment() {

HttpServletRequest request = getRequest();

HttpServletResponse response = getResponse();

String userName = getPara("userName");

String phone = getPara("phone");

String orderAmount = getPara("orderAmount");

try {

response.setContentType("text/html");

response.setCharacterEncoding("UTF-8");

request.setCharacterEncoding("UTF-8");

String redirect_uri=URLEncoder.encode(/*你的网页授权域名*/, "UTF-8");

String url =

"?" +

"appid=" + /*你的APPID*/ +

"&redirect_uri=" + redirect_uri +

"?userName=" + URLEncoder.encode(userName) +

"%26phone=" + phone +

"%26orderAmount=" + orderAmount +

"&response_type=code" +

"&scope=snsapi_base" +

"&state=STATE" +

"#wechat_redirect";

response.sendRedirect(url.toString());

} catch (Exception e) {

log.error("微信支付出现异常", e);

}

｝

此处需要注意：

网页授权域名必须在微信公众平台设置过，代码中必须加上你要跳转且获取参数的方法名，例如：网页授权域名/wxPay第一个参数必须是？挂载，后面的参数必须用%26进行转义，否则微信识别不了针对有汉字的参数，必须进行编码URLEncoder.encode(参数)，否则微信识别不了

第二步：网页授权域名后面的方法，请求回调跳转的接口

public void wxPay() {

HttpServletRequest request = getRequest();

HttpServletResponse response = getResponse();

try {

response.setContentType("text/html");

request.setCharacterEncoding("UTF-8");

response.setCharacterEncoding("UTF-8");

String code = request.getParameter("code");

String userName = request.getParameter("userName");

String phone = request.getParameter("phone");

String orderAmount = request.getParameter("orderAmount");

} catch (Exception e) {

log.error("微信支付出现异常", e);

}

}

这样一来，除了code，就可以获取到其他的订单参数啦，接下来就根据code获取openId进行下单处理吧!我们下次分享