微信接口调用之签名生成工具

package com.hetao.common.util; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileInputStream; import java.io.FileWriter; import java.io.InputStreamReader; import java.util.Random; import org.json.JSONObject; import com.google.gson.JsonObject; public class JSSDKUtil { private final static String APPID=""; private final static String SECRET=""; public static String getSignPackage(String _url) { String jsapiTicket=JSSDKUtil.getJsApiTicket(); String url=_url; String timestamp=String.valueOf(System.currentTimeMillis()).substring(0, 10); String nonceStr=JSSDKUtil.createNonceStr(); String result="jsapi_ticket="+jsapiTicket+"&noncestr="+nonceStr+"&timestamp="+timestamp+"&url="+url; String signature=null; try { signature= SHA1Util.getSha1(result); } catch (Exception e) { e.printStackTrace(); } JsonObject object= new JsonObject(); object.addProperty("appId", JSSDKUtil.APPID); object.addProperty("nonceStr", nonceStr); object.addProperty("timestamp", timestamp); object.addProperty("url", url); object.addProperty("signature", signature); object.addProperty("rawString", result); return object.toString(); } public static String createNonceStr() { int length = 16; String charString = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; StringBuffer sb = new StringBuffer(); Random random = new Random(); for (int i = 0; i < length; i++) { int a = random.nextInt(charString.length() - 1); sb = sb.append(charString.substring(a, a + 1)); } return sb.toString(); } // jsapi_ticket是公众号用于调用微信JS接口的临时票据 // 正常情况下，jsapi_ticket的有效期为7200秒，通过access_token来获取。 public static String getJsApiTicket() { //利用绝对路径来定位文件地址,文件存放于SRC目录之下 String path=Thread.currentThread().getContextClassLoader().getResource("").toString().substring(5); String content = JSSDKUtil.readContent(path+"jsapi_ticket.json"); JSONObject dataJson = null; String expire_time=null; String jsapi_ticket=null; try { dataJson = new JSONObject(content); expire_time = dataJson.getString("expire_time"); if (Integer.parseInt(expire_time)<Integer.parseInt(String.valueOf(System.currentTimeMillis()).substring(0,10))) { String accessToken=JSSDKUtil.getAccessToken(); String url ="https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token="+accessToken; JSONObject resJson=new JSONObject(HttpRequestUtil.sendGet(url, null)); String ticket =resJson.getString("ticket"); if(ticket!=null){ expire_time=String.valueOf(Integer.parseInt(String.valueOf(System.currentTimeMillis()).substring(0,10))+7000); jsapi_ticket=ticket; JsonObject object= new JsonObject(); object.addProperty("jsapi_ticket", jsapi_ticket); object.addProperty("expire_time", expire_time); System.out.println(path+"这时jsapi_ticket的路径"); JSSDKUtil.writeContent(path+"jsapi_ticket.json", object.toString()); } }else{ jsapi_ticket=dataJson.getString("jsapi_ticket"); } } catch (Exception e) { e.printStackTrace(); } return jsapi_ticket; } public static String getAccessToken() { String path=Thread.currentThread().getContextClassLoader().getResource("").toString().substring(5); String content = JSSDKUtil.readContent(path + "access_token.json"); JSONObject dataJson = null; String expire_time=null; String access_token =null; try { dataJson = new JSONObject(content); expire_time = dataJson.getString("expire_time"); if (Integer.parseInt(expire_time)<Integer.parseInt(String.valueOf(System.currentTimeMillis()).substring(0,10))) { String url ="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+JSSDKUtil.APPID+"&secret="+JSSDKUtil.SECRET; JSONObject resJson=new JSONObject(HttpRequestUtil.sendGet(url, null)); access_token =resJson.getString("access_token"); if(access_token!=null){ expire_time=String.valueOf(Integer.parseInt(String.valueOf(System.currentTimeMillis()).substring(0,10))+7000); //构建JSON格式数据，写入文本文件中 JsonObject object= new JsonObject(); object.addProperty("access_token", access_token); object.addProperty("expire_time", expire_time); System.out.println(path+"这时access_token的路径"); JSSDKUtil.writeContent(path+"access_token.json", object.toString()); } }else { access_token=dataJson.getString("access_token"); } } catch (Exception e) { e.printStackTrace(); } return access_token; } // 读取文本文件 public static String readContent(String path) { StringBuffer content = new StringBuffer(); try { File file = new File(path); if (file.isFile() && file.exists()) { InputStreamReader read = new InputStreamReader(new FileInputStream(file)); BufferedReader br = new BufferedReader(read); String temp = null; while ((temp = br.readLine()) != null) { content = content.append(temp); } read.close(); } } catch (Exception e) { e.printStackTrace(); } return content.toString(); } // 写入文本文件 public static void writeContent(String path, String content) { try { File file = new File(path); if (!file.exists()) { file.createNewFile(); } FileWriter fw = new FileWriter(file); BufferedWriter bw = new BufferedWriter(fw); bw.write(content); bw.flush(); bw.close(); fw.close(); } catch (Exception e) { e.printStackTrace(); } } }