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1、java微信开发之上传下载多媒体文件_ 这篇文章主要为大家具体介绍了java微信开发之简洁实现上传下载多媒体文件的相关资料，感爱好的小伙伴们可以参考一下 回复图片、音频、视频消息都是需要media_id的，这个是需要将多媒体文件上传到微信服务器才有的。 上传下载多媒体文件的方法还是写到WeixinUtil.java中。 代码如下: import java.io.BufferedOutputStream; import java.io.BufferedReader; import java.io.DataInputStream; import java.io.DataOutputStream;
2、import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import .HttpURLConnection; import .MalformedURLException; import .URL; import java.security.Key
3、ManagementException; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.security.SecureRandom; import java.util.Calendar; import java.util.Date; import java.util.HashMap; import java.util.Map; import .ssl.HttpsURLConnection; import .ssl.SSLContex
4、t; import .ssl.SSLSocketFactory; import .ssl.TrustManager; import net.sf.json.JSONObject; import mons.lang.StringUtils; import org.apache.log4j.Logger; import pany.project.model.menu.AccessToken; import pany.project.model.menu.Menu; public class WeixinUtil private static Logger log = Logger.getLogge
5、r(WeixinUtil.class); public final static String APPID = wxb927d4280e6db674; public final static String APP_SECRET = 21441e9f3226eee81e14380a768b6d1e; / 猎取access_token的接口地址（GET） 限200（次/天） public final static String access_token_url = https:/ / 创建菜单 public final static String create_menu_url = https:/
6、 / 存放：1.token，2：猎取token的时间,3.过期时间 public final static MapString,Object accessTokenMap = new HashMapString,Object(); /* * 发起https恳求并猎取结果 * * param requestUrl 恳求地址 * param requestMethod 恳求方式（GET、POST） * param outputStr 提交的数据 * return JSONObject(通过JSONObject.get(key)的方式猎取json对象的属性值) */ public static JS
7、ONObject handleRequest(String requestUrl,String requestMethod,String outputStr) JSONObject jsonObject = null; try URL url = new URL(requestUrl); HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); SSLContext ctx = SSLContext.getInstance(SSL, SunJSSE); TrustManager tm = new MyX509Tru
8、stManager(); ctx.init(null, tm, new SecureRandom(); SSLSocketFactory sf = ctx.getSocketFactory(); conn.setSSLSocketFactory(sf); conn.setDoInput(true); conn.setDoOutput(true); conn.setRequestMethod(requestMethod); conn.setUseCaches(false); if (GET.equalsIgnoreCase(requestMethod) conn.connect(); if (S
9、tringUtils.isNotEmpty(outputStr) OutputStream out = conn.getOutputStream(); out.write(outputStr.getBytes(utf-8); out.close(); InputStream in = conn.getInputStream(); BufferedReader br = new BufferedReader(new InputStreamReader(in,utf-8); StringBuffer buffer = new StringBuffer(); String line = null;
10、while (line = br.readLine() != null) buffer.append(line); in.close(); conn.disconnect(); jsonObject = JSONObject.fromObject(buffer.toString(); catch (MalformedURLException e) e.printStackTrace(); log.error(URL错误！); catch (IOException e) e.printStackTrace(); catch (NoSuchAlgorithmException e) e.print
11、StackTrace(); catch (NoSuchProviderException e) e.printStackTrace(); catch (KeyManagementException e) e.printStackTrace(); return jsonObject; /* * 猎取access_token * * author qincd * date Nov 6, 2021 9:56:43 AM */ public static AccessToken getAccessToken(String appid,String appSecret) AccessToken at =
12、 new AccessToken(); / 每次猎取access_token时，先从accessTokenMap猎取，假如过期了就重新从微信猎取 / 没有过期挺直返回 / 从微信猎取的token的有效期为2个小时 if (!accessTokenMap.isEmpty() Date getTokenTime = (Date) accessTokenMap.get(getTokenTime); Calendar c = Calendar.getInstance(); c.setTime(getTokenTime); c.add(Calendar.HOUR_OF_DAY, 2); getToken
13、Time = c.getTime(); if (getTokenTime.after(new Date() log.info(缓存中发觉token未过期，挺直从缓存中猎取access_token); / token未过期，挺直从缓存猎取返回 String token = (String) accessTokenMap.get(token); Integer expire = (Integer) accessTokenMap.get(expire); at.setToken(token); at.setExpiresIn(expire); return at; String requestUrl = access_token_url.replace(APPID, appid).replace(APPSECRET, appSecret); JSONObject object = handleRequest(requestUrl, GET, null); String access_token = object.getString(access_toke
