java微信分享功能（分享给好友/分享到朋友圈）

加密

package com.mons.wx;import java.security.MessageDigest;public class Sha1 {private static final char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5','6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};private static String getFormattedText(byte[] bytes) {int len = bytes.length;StringBuilder buf = new StringBuilder(len * 2);// 把密文转换成十六进制的字符串形式for (int j = 0; j < len; j++) {buf.append(HEX_DIGITS[(bytes[j] >> 4) & 0x0f]);buf.append(HEX_DIGITS[bytes[j] & 0x0f]);}return buf.toString();}public static String encode(String str) {if (str == null) {return null;}try {MessageDigest messageDigest = MessageDigest.getInstance("SHA1");messageDigest.update(str.getBytes());return getFormattedText(messageDigest.digest());} catch (Exception e) {throw new RuntimeException(e);}}}

随机字符串

package com.mons.wx;import java.util.Random;public class RandomStr {private static char ch[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G','H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b','c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w','x', 'y', 'z', '0', '1' };//最后又重复两个0和1，因为需要凑足数组长度为64private static Random random = new Random();//生成指定长度的随机字符串public static String createRandomString(int length) {if (length > 0) {int index = 0;char[] temp = new char[length];int num = random.nextInt();for (int i = 0; i < length % 5; i++) {temp[index++] = ch[num & 63];//取后面六位，记得对应的二进制是以补码形式存在的。num >>= 6;//63的二进制为:111111// 为什么要右移6位？因为数组里面一共有64个有效字符。为什么要除5取余？因为一个int型要用4个字节表示，也就是32位。}for (int i = 0; i < length / 5; i++) {num = random.nextInt();for (int j = 0; j < 5; j++) {temp[index++] = ch[num & 63];num >>= 6;}}return new String(temp, 0, length);}else if (length == 0) {return "";}else {throw new IllegalArgumentException();}}public static void main(String[] args) {System.out.println(createRandomString(16));}}

发送请求

package com.itsoft.customer.controller;import cn.hutool.json.JSONUtil;import com.mons.interceptor.ResponseResult;import com.mons.wx.RandomStr;import com.mons.wx.Sha1;import com.itsoft.framework.core.data.DataMap;import com.itsoft.framework.core.data.Result;import io.swagger.annotations.Api;import io.swagger.annotations.ApiOperation;import mons.lang.StringUtils;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.StatusLine;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.HttpResponseException;import org.apache.http.client.ResponseHandler;import org.apache.http.client.methods.HttpGet;import org.apache.http.conn.ssl.SSLConnectionSocketFactory;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClientBuilder;import org.apache.http.impl.client.HttpClients;import org.apache.http.util.EntityUtils;import org.json.JSONException;import org.json.JSONObject;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.bind.annotation.RestController;import .ssl.SSLContext;import .ssl.TrustManager;import .ssl.X509TrustManager;import java.io.IOException;import .URI;import java.security.cert.CertificateException;import java.security.cert.X509Certificate;import java.util.HashMap;import java.util.Map;@RestController@RequestMapping(value = "/frontendGetWx", produces = "application/json;charset=UTF-8")@ResponseResult@Api(value = "(getWx)getWx 微信权限", tags = "(getWx)getWx 微信权限")public class ShareController extends CommonController{/*** 微信公众号的appid*/private String appid="wx";/*** 微信公众号的appSecret*/private String secret="db";/*** 获取微信分享配置的请求 方法只写了主要方法，需要根据自己的要求 完善代码* @param url 前台传过来的当前页面的请求地址* @return*/@ApiOperation(notes = "获取微信分享配置的请求 方法只写了主要方法，需要根据自己的要求 完善代码", value = "获取微信分享配置的请求 方法只写了主要方法，需要根据自己的要求 完善代码")@RequestMapping(value = "/getWxConfig",method = RequestMethod.POST)public Result share(String url){long timestamp = System.currentTimeMillis() / 1000;String noncestr = RandomStr.createRandomString(16);String ticket =getJsapiTicket();String str = "jsapi_ticket=" + ticket + "&noncestr=" + noncestr + "&timestamp=" + timestamp + "&url=" + url;logger.info("===============签名str：{}============" , str);String signature = Sha1.encode(str);//这只是简单写法，没有做错误判断Map map=new HashMap();map.put("appId",appid);map.put("timestamp",timestamp);map.put("nonceStr",noncestr);map.put("signature",signature);//这里使用了hutool工具将map转为String// String json = JSONUtil.toJsonStr(map);return Result.success(map);}/*** 官方文档：https://developers./doc/offiaccount/OA_Web_Apps/JS-SDK.html#62** 获取jsapi_ticket*** 生成签名之前必须先了解一下jsapi_ticket，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。* 由于获取jsapi_ticket的api调用次数非常有限，频繁刷新jsapi_ticket会导致api调用受限，影响自身业务，开发者必须在自己的服务全局缓存jsapi_ticket 。** 参考以下文档获取access_token（有效期7200秒，开发者必须在自己的服务全局缓存access_token）：* https://developers./doc/offiaccount/Basic_Information/Get_access_token.html** 用第一步拿到的access_token 采用http GET方式请求获得jsapi_ticket（有效期7200秒，开发者必须在自己的服务全局缓存jsapi_ticket）：* https://api./cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi** @return*/public String getJsapiTicket() {String tokenUrl = "https://api./cgi-bin/token?grant_type=client_credential";tokenUrl = tokenUrl + "&appid=" + appid + "&secret=" + secret;JSONObject tokenJson=new JSONObject();tokenJson=getUrlResponse(tokenUrl);logger.info("===============tokenJson：{}============" , tokenJson.toString());String token="";try {token=tokenJson.getString("access_token");} catch (JSONException e) {e.printStackTrace();logger.info("===============报错了{}============" , e);System.out.println("报错了");return null;}String jsapiTicketUrl="https://api./cgi-bin/ticket/getticket?access_token=ACCESS_TOKEN&type=jsapi";JSONObject jsapiTickeJson=new JSONObject();System.out.println("getJsapiTicket：获取token："+token);if(StringUtils.isNotBlank(token)){jsapiTicketUrl = jsapiTicketUrl.replace("ACCESS_TOKEN",token);jsapiTickeJson=getUrlResponse(jsapiTicketUrl);// System.out.println("tokenJson:"+jsapiTickeJson.toString());logger.info("===============tokenJson：{}============" ,jsapiTickeJson.toString());try {return (String) jsapiTickeJson.get("ticket");} catch (JSONException e) {e.printStackTrace();return null;}}else{return null;}}private JSONObject getUrlResponse(String url){CharsetHandler handler = new CharsetHandler("UTF-8");try {HttpGet httpget = new HttpGet(new URI(url));HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();//HttpClientCloseableHttpClient client = httpClientBuilder.build();client = (CloseableHttpClient) wrapClient(client);return new JSONObject(client.execute(httpget, handler));} catch (Exception e) {e.printStackTrace();return null;}}private static HttpClient wrapClient(HttpClient base) {try {SSLContext ctx = SSLContext.getInstance("TLSv1");X509TrustManager tm = new X509TrustManager() {public void checkClientTrusted(X509Certificate[] xcs,String string) throws CertificateException {}public void checkServerTrusted(X509Certificate[] xcs,String string) throws CertificateException {}public X509Certificate[] getAcceptedIssuers() {return null;}};ctx.init(null, new TrustManager[] {tm }, null);SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(ctx, new String[] {"TLSv1" }, null,SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();return httpclient;} catch (Exception ex) {return null;}}private class CharsetHandler implements ResponseHandler<String> {private String charset;public CharsetHandler(String charset) {this.charset = charset;}public String handleResponse(HttpResponse response)throws ClientProtocolException, IOException {StatusLine statusLine = response.getStatusLine();if (statusLine.getStatusCode() >= 300) {throw new HttpResponseException(statusLine.getStatusCode(),statusLine.getReasonPhrase());}HttpEntity entity = response.getEntity();if (entity != null) {if (!StringUtils.isBlank(charset)) {return EntityUtils.toString(entity, charset);} else {return EntityUtils.toString(entity);}} else {return null;}}}}