java调用微信接口实现网页分享小功能

本文实例为大家分享了java调用微信接口实现网页分享小功能的具体代码，供大家参考，具体内容如下

// 获取access_token  *注意* 经过实际开发测试，微信分享不支持跨域请求，因此获取access_token的请求必须从服务器发起，否则无法获取到access_token所以以下都是服务端操作

微信接口说明

参考文章：java微信分享接口开发详解

一、微信util类

public class shareconstants {
 //微信获取ticket的接口
 public static final string ticket_url_test = "https://api.weixin.qq.com/cgi-bin/ticket/getticket" ;
 public static final string type = "jsapi" ;
 //微信获取token的接口
 public static final string get_token_url = "https://api.weixin.qq.com/cgi-bin/token";
 public static final string grant_type = "client_credential" ;
 
}

public class weixinutil {
 
 private static logger logger = loggerfactory.getlogger(weixinutil.class) ;
 
 public static boolean signaturecheck(string token,string timestamp,string nonce,string signature) throws exception{
 
 list<string > list = new arraylist<string>(3){
  public string tostring(){
  return this.get(0)+this.get(1)+this.get(2) ;
  }
 } ;
 
 list.add(token) ;
 list.add(timestamp) ;
 list.add(nonce) ;
 
 collections.sort(list) ;
 messagedigest md = messagedigest.getinstance("sha-1") ;
 byte[] digest = md.digest(list.tostring().getbytes()) ;
 string teststr = weixinutil.bytearraytohexstring(digest) ;
 logger.info("token:{},timestamp:{},nonce:{},teststr:{}");
 if(teststr.equalsignorecase(signature.touppercase())){
  return true;
 }else{
  return false ;
 }
 }
 
 public static string signature(string jsapiticket,string noncestr,long timestamp,string url) throws exception{
 
 string str = string.format("jsapi_ticket=%s&noncestr=%s&timestamp=%d&url=%s",
  jsapiticket,noncestr,timestamp,url) ;
 logger.info("signature url:{}",str);
 messagedigest md = messagedigest.getinstance("sha-1") ;
 byte[] digest = md.digest(str.getbytes()) ;
 
 string sigstr = weixinutil.bytearraytohexstring(digest) ;
 return sigstr ;
 }
 
 public static string bytearraytohexstring(byte[] array){
 string strdigest = "" ;
 for(int i = 0 ;i<array.length;i++){
  strdigest+=bytetohexstring(array[i]) ;
 }
 return strdigest ;
 }
 
 public static string bytetohexstring(byte ib){
 char[] digit = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'} ;
 char [] ob = new char[2] ;
 ob[0] = digit[(ib >>> 4) & 0x0f] ;
 ob[1] = digit[ib &0x0f] ;
 string s = new string(ob) ;
 return s ;
 }
 
 
 public static string getweixinsharetoken(string appid,string secret) throws exception{
 map<string,string> maps = new hashmap<string,string>() ;
 maps.put("grant_type", shareconstants.grant_type) ;
 maps.put("appid",appid) ;
 maps.put("secret",secret) ;
 try{
  string result = httpinvokeutil.httpget(shareconstants.get_token_url,maps) ;
  jsonobject jsonobject = jsonobject.parseobject(result) ;
  string access_token = (string) jsonobject.get("access_token") ;
  integer expires_in = (integer) jsonobject.get("expires_in") ;
  logger.debug("gettoken access_token:{},expires_in:{}",access_token,expires_in);
  if(access_token !=null && expires_in!=null && expires_in==7200)
  return access_token ;
  else
  return null ;
 }catch (exception ex){
  logger.error("ex:stack:{}",ex.getstacktrace().tostring());
  throw new exception("get token failed");
 }
 }
 
 public static string getjsapiticket(string token) throws exception{
 map<string,string> maps = new hashmap<string,string>() ;
 maps.put("access_token",token);
 maps.put("type",shareconstants.type);
 try{
  string result = httpinvokeutil.httpget(shareconstants.ticket_url_test,maps) ;
  jsonobject jsonobject = jsonobject.parseobject(result) ;
  integer errcode = (integer) jsonobject.get("errcode") ;
  if(errcode==null || (errcode!=null &&errcode!=0)){
  logger.error("get jsapiticket is failed, errcode:{}",errcode);
  return null ;
  }else{
  string ticket = (string) jsonobject.get("ticket") ;
  return ticket ;
  }
 }catch (exception ex){
  logger.error("ex.stack:{}",ex.getstacktrace().tostring());
  throw new exception("getjsapi ticket is failed") ;
 }
 }
 
}

注意上面httpinvokeutil.httpget()是httpclint这个可以自己去写，只要能发请求就行，

二、controller层

//currurl ==前端想要分享的网页地址
 @requestmapping(value = "/getwconfig", method = requestmethod.get)
 @responsebody
 //@requiredlogin
 public frameresp getwconfig(@param("currurl") string currurl) throws userexception, exception {
 if (currurl == null) {
  return builderrorresp(errorcodeconst.error_param_error);
 }
 logger.info("get the encode currurl {}", currurl);
 
 string urltmp = urldecoder.decode(currurl, "utf-8");
 
 logger.info("decode currurl {}", currurl);
 
 long timestamp = new date().gettime() / 1000;
 string url = urltmp.split("#")[0];
 
 wconfigresp wconfigresp = new wconfigresp();
 
 //修改为本地加载分享
 //shareconfig.getappid()==自己的appid
 //shareconfig.getuxinappsecret()==自己的appsecret
 string token = weixinutil.getweixinsharetoken(shareconfig.getappid(), shareconfig.getuxinappsecret());
 string ticket = weixinutil.getjsapiticket(token);
 if (ticket == null) {
  logger.error("get jsapiticketsec is failed");
  throw new exception("get jsapi is failed");
 }
 wconfigresp.setappid(shareconfig.getappid());
 wconfigresp.settimestamp(timestamp);
 wconfigresp.setnoncestr(randomstringutils.random(10, true, true));
 
 logger.info("appid:{},ticket:{},timestamp:{},noncestr:{},url:{}", shareconfig.getappid(), ticket, timestamp, wconfigresp.getnoncestr(), url);
 
 string signature = weixinutil.signature(ticket, wconfigresp.getnoncestr(), wconfigresp.gettimestamp(), url);
 if (signature != null) {
  wconfigresp.setsignature(signature);
  return buildsuccessresp(wconfigresp);
 } else {
  logger.error("getwcconfig is failed");
  throw new exception("error getwconfig");
 }
}

三、自定义的返回值类-wconfigresp

@data
public class wconfigresp extends basemodel{
 private string appid ;
 private long timestamp ;
 private string noncestr;
 private string signature ;
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。