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Windows安装Zookeeper zookeeper有单机、伪集群、集群三种部署方式，可根据自己对可靠性的需求选择合适的部署方式。下边是单机部署的介绍。1.下载安装进入下载目录，选择自己要下载的版本，这里以zookeeper-3.4.9为例下载地址：http://archive.apache.org/dist/zookeeper/ 2.配置2.1解压解压后的目录如下点击conf,把zoo_sample.cfg修改成zoo.cfg,必须是叫这个名称。 2.2修改zoo.cfg 2.3启动zookeeper服务在bin文件下的zkServer.cmd. 双击看到2181表示启动成功检查是否启动成功，cmd窗口运行jps至此Zookeeper单机版布置完成，搭建dubbo时先启动Zookeeper -
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HTML设置File文件选择格式 <input type="file" accept="application/msword" >1.accept=”application/msexcel” 2.accept=”application/msword” 3.accept=”application/pdf” 4.accept=”application/poscript” 5.accept=”application/rtf” 6.accept=”application/x-zip-compressed” 7.accept=”audio/basic” 8.accept=”audio/x-aiff” 9.accept=”audio/x-mpeg” 10.accept=”audio/x-pn/realaudio” 11.accept=”audio/x-waw” 12.accept=”image/gif” 13.accept=”image/jpeg” 14.accept=”image/tiff” 15.accept=”image/x-ms-bmp” 16.accept=”image/x-photo-cd” 17.accept=”image/x-png” 18.accept=”image/x-portablebitmap” 19.accept=”image/x-portable-greymap” 20.accept=”image/x-portable-pixmap”21.accept=”image/x-rgb” 22.accept=”text/html” 23.accept=”text/plain” 24.accept=”video/quicktime” 25.accept=”video/x-mpeg2” 26.accept=”video/x-msvideo”如果限制上传的文件为图片格式，则可以直接写成：accept = ‘image/*’；
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ERROR: '对实体 "web_id" 的引用必须以 ';' 分隔符结尾。' 加载界面提示：ERROR: '对实体 "web_id" 的引用必须以 ';' 分隔符结尾。'解决方式：在变量前加上“amp;”即可。错误示例：<script src="https://****.com?id=1277655852&web_id=1277655852" language="JavaScript"></script>修改后：<script src="https://****.com?id=1277655852&web_id=1277655852" language="JavaScript"></script>
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xml转换json工具类 导入依赖 <dependency> <groupId>dom4j</groupId> <artifactId>dom4j</artifactId> <version>1.6.1</version> </dependency>工具类 import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONObject; import org.dom4j.*; import java.io.File; import java.io.FileInputStream; import java.nio.ByteBuffer; import java.nio.channels.FileChannel; import java.util.List; import java.util.logging.Logger; /** * xml转换json工具类 * @Author: LiuYong * @Date:2019/12/11 10:00 * @Description: TODO xml转换json工具类 */ public class XmlToJsonUtils { private static Logger logger = Logger.getLogger(XmlToJsonUtils.class.getName()); public static void main(String[] args) throws Exception { String xml ="<xml>\n" + "<appid>wx2421b1c4370ec43b</appid>\n" + "<attach><![CDATA[att1]]></attach>\n" + "<body><![CDATA[JSAPI支付测试]]></body>\n" + "<device_info>1000</device_info>\n" + "<mch_id>10000100</mch_id>\n" + "<nonce_str>b927722419c52622651a871d1d9ed8b2</nonce_str>\n" + "<notify_url>http://wxpay.weixin.qq.com/pub_v2/pay/notify.php</notify_url>\n" + "<out_trade_no>1405713376</out_trade_no>\n" + "<spbill_create_ip>127.0.0.1</spbill_create_ip>\n" + "<total_fee>1</total_fee>\n" + "<trade_type>JSAPI</trade_type>\n" + "<sign><![CDATA[3CA89B5870F944736C657979192E1CF4]]></sign>\n" + "</xml>"; String s = xmlToJson(xml); System.out.println(s); JSONObject jsonObject = xml2Json(xml); System.out.println(jsonObject); } /** * xml字符串转json字符串 * @Author LiuYong * @Date 2019/12/11 10:06 * @Description TODO * @param xml * @return String **/ public static String xmlToJson(String xml) { Document doc; try { doc = DocumentHelper.parseText(xml); JSONObject json = new JSONObject(); dom4j2Json(doc.getRootElement(), json); return json.toJSONString(); } catch (DocumentException e) { logger.info("数据解析失败"); } return null; } /** * 根据xml文件路径转换json字符串 * @Author LiuYong * @Date 2019/12/11 10:06 * @Description TODO * @param path * @return String **/ public static String readFile(String path) throws Exception { File file = new File(path); FileInputStream fis = new FileInputStream(file); FileChannel fc = fis.getChannel(); ByteBuffer bb = ByteBuffer.allocate(new Long(file.length()).intValue()); /**fc向buffer中读入数据*/ fc.read(bb); bb.flip(); String str = new String(bb.array(), "UTF8"); fc.close(); fis.close(); return str; } /** * xml转json * * @param xmlStr * @return * @throws DocumentException */ public static JSONObject xml2Json(String xmlStr) throws DocumentException { Document doc = DocumentHelper.parseText(xmlStr); JSONObject json = new JSONObject(); dom4j2Json(doc.getRootElement(), json); return json; } /** * xml转json * @Author LiuYong * @Date 2019/12/11 10:07 * @Description TODO * @param element * @param json 外部接收json对象 **/ public static void dom4j2Json(Element element, JSONObject json) { /**如果是属性*/ for (Object o : element.attributes()) { Attribute attr = (Attribute) o; if (!isEmpty(attr.getValue())) { json.put("@" + attr.getName(), attr.getValue()); } } List<Element> chdEl = element.elements(); /**如果没有子元素,只有一个值*/ if (chdEl.isEmpty() && !isEmpty(element.getText())) { json.put(element.getName(), element.getText()); } /**有子元素*/ for (Element e : chdEl) { /**子元素存在子元素*/ if (!e.elements().isEmpty()) { JSONObject chdjson = new JSONObject(); dom4j2Json(e, chdjson); Object o = json.get(e.getName()); if (o != null) { JSONArray jsona = null; /**如果此元素已存在,则转为jsonArray*/ if (o instanceof JSONObject) { JSONObject jsono = (JSONObject) o; json.remove(e.getName()); jsona = new JSONArray(); jsona.add(jsono); jsona.add(chdjson); } if (o instanceof JSONArray) { jsona = (JSONArray) o; jsona.add(chdjson); } json.put(e.getName(), jsona); } else { if (!chdjson.isEmpty()) { json.put(e.getName(), chdjson); } } } else { /**子元素没有子元素*/ for (Object o : element.attributes()) { Attribute attr = (Attribute) o; if (!isEmpty(attr.getValue())) { json.put("@" + attr.getName(), attr.getValue()); } } if (!e.getText().isEmpty()) { json.put(e.getName(), e.getText()); } } } } /** * 是否为null * @Author LiuYong * @Date 2019/12/11 10:28 * @Description TODO * @param * @return **/ public static boolean isEmpty(String str) { if (str == null || str.trim().isEmpty() || str.equals("null")) { return true; } return false; } }
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mqtt websocket web消息推送（房间消息发送） 部分html<!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title></title> <script src="js/mqttws31.js" type="text/javascript" /> <script> var hostname = 'ip', port = 9001, //websocket 端口 clientId = 'client-2020', timeout = 5, keepAlive = 50, cleanSession = false, ssl = false, userName = 'test',//mqtt 账户 password = 'test',//mqtt 密码 topic = 'test/test';//主题 client = new Paho.MQTT.Client(hostname, port, clientId); //建立客户端实例 var options = { invocationContext: { host : hostname, port: port, path: client.path, clientId: clientId }, timeout: timeout, keepAliveInterval: keepAlive, cleanSession: cleanSession, useSSL: ssl, userName: userName, password: password, onSuccess: onConnect, onFailure: function(e){ console.log(e); } }; client.connect(options); //连接服务器并注册连接成功处理事件 function onConnect() { console.log("onConnected"); client.subscribe(topic); } client.onConnectionLost = onConnectionLost; //注册连接断开处理事件 client.onMessageArrived = onMessageArrived; //注册消息接收处理事件 function onConnectionLost(responseObject) { console.log(responseObject); if (responseObject.errorCode !== 0) { console.log("onConnectionLost:"+responseObject.errorMessage); console.log("连接已断开"); } } function onMessageArrived(message) { console.log("收到消息:"+message.payloadString); } function send(){ var s = document.getElementById("msg").value; if(s){ s = "{time:"+new Date().Format("yyyy-MM-dd hh:mm:ss")+", content:"+(s)+", from: web console}"; message = new Paho.MQTT.Message(s); message.destinationName = topic; client.send(message); document.getElementById("msg").value = ""; } } var count = 0; function start(){ window.tester = window.setInterval(function(){ if(client.isConnected){ var s = "{time:"+new Date().Format("yyyy-MM-dd hh:mm:ss")+", content:"+(count++)+", from: web console}"; message = new Paho.MQTT.Message(s); message.destinationName = topic; client.send(message); } }, 1000); } function stop(){ window.clearInterval(window.tester); } Date.prototype.Format = function (fmt) { //author: meizz var o = { "M+": this.getMonth() + 1, //月份 "d+": this.getDate(), //日 "h+": this.getHours(), //小时 "m+": this.getMinutes(), //分 "s+": this.getSeconds(), //秒 "q+": Math.floor((this.getMonth() + 3) / 3), //季度 "S": this.getMilliseconds() //毫秒 }; if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length)); for (var k in o) if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length))); return fmt; } </script> </head> <body> <input type="text" id="msg"/> <input type="button" value="Send" onclick="send()"/> <input type="button" value="Start" onclick="start()"/> <input type="button" value="Stop" onclick="stop()"/> </body> </html> 注意事项 1、如果使用wss需要配置nginxssl改为trueport 改为 443 2、如果使用ws则不需要配置nginxssl改为falseport改为mqtt服务ws开放的端口源码：https://github.com/Uncle-LiuY/demo-websocket项目首页：http://192.168.0.82:8888/room
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uniapp拉起抖音视频 aweme/detail/6833328698612043011?refer=web&gd_label=click_wap_download_banner&appParam=&needlaunchlog=1plus.runtime.openURL("snssdk1128://aweme/detail/6833328698612043011?refer=web&gd_label=click_wap_download_banner&appParam=&needlaunchlog=1",function(res){ console.log(res) }) 推荐博客：https://www.jianshu.com/p/2271ca5881e1
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java.lang.NoSuchMethodError: org.springframework.boot.builder.SpringApplicationBuilder.
([Ljava 搭建spring cloud,启动时报错：java.lang.NoSuchMethodError: org.springframework.boot.builder.SpringApplicationBuilder.<init>([Ljava/lang/Object;)V这个是版本兼容原因 <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.1.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent>改： <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.9.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent>
