微信JS-SDK扫一扫_DEMO

package com.ricky.utils.weixin; import java.util.UUID; import java.util.Map; import java.util.HashMap; import java.util.Formatter; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.io.UnsupportedEncodingException; import net.sf.json.JSONObject; public class WxJSUtil { public static void main(String[] args) { JSONObject json1=getTokenTool("wxcc42f613dbf7299f", "e59e10c74c70b1c042b5ecaf454052ac"); String access_token=json1.getString("access_token"); System.out.println(json1.toString()); JSONObject json2=getTicketTool(access_token); String ticket=json2.getString("ticket"); System.out.println(json2.toString()); System.out.println("access_token:"+access_token); System.out.println("ticket:"+ticket); }; public static Map<String, String> sign(String url) { String appId="wxcc42f613dbf7299f"; String appSecret="e59e10c74c70b1c042b5ecaf454052ac"; String access_token=getTokenTool(appId, appSecret).getString("access_token"); JSONObject ticketJson=getTicketTool(access_token); System.out.println(ticketJson.toString()); String jsapi_ticket = ticketJson.getString("ticket"); Map<String, String> ret = new HashMap<String, String>(); //这里的jsapi_ticket是获取的jsapi_ticket。 String nonce_str = create_nonce_str(); String timestamp = create_timestamp(); String string1; String signature = ""; //注意这里参数名必须全部小写，且必须有序 string1 = "jsapi_ticket=" + jsapi_ticket + "&noncestr=" + nonce_str + "&timestamp=" + timestamp + "&url=" + url; try { MessageDigest crypt = MessageDigest.getInstance("SHA-1"); crypt.reset(); crypt.update(string1.getBytes("UTF-8")); signature = byteToHex(crypt.digest()); System.out.println("crypt="+crypt.toString()); System.out.println("string1="+string1); System.out.println("signature="+signature); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } ret.put("url", url); ret.put("jsapi_ticket", jsapi_ticket); ret.put("nonceStr", nonce_str); ret.put("timestamp", timestamp); ret.put("signature", signature); return ret; } private static String byteToHex(final byte[] hash) { Formatter formatter = new Formatter(); for (byte b : hash) { formatter.format("%02x", b); } String result = formatter.toString(); formatter.close(); return result; } private static String create_nonce_str() { return UUID.randomUUID().toString(); } private static String create_timestamp() { return Long.toString(System.currentTimeMillis() / 1000); } public static JSONObject getTicketTool(String access_token){ String url="https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="+access_token+"&type=jsapi"; // System.out.println(HttpRequestUtil.httpRequest(url, "GET", "")); return HttpRequestUtil.httpRequest(url, "GET", ""); } public static JSONObject getTokenTool(String appId,String appSecret){ String url="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+appId+"&secret="+appSecret; // System.out.println(HttpRequestUtil.httpRequest(url, "GET", "")); return HttpRequestUtil.httpRequest(url, "GET", ""); } }