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

微信接口说明参考地址

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小牛知识库。