这篇文章主要通过实例代码为大家详细介绍了如何在Java 环境下使用 HTTP 协议收发 MQ 消息，需要的朋友可以参考下
1. 准备环境
在工程 POM 文件添加 HTTP Java 客户端的依赖。
org.eclipse.jettyjetty-client9.3.4.RC1com.aliyun.openservicesons-client1.1.11
2. 运行代码配置（user.properties）
您需要设置配置文件(user.properties)的相关内容，具体请参考申请 MQ 资源 。
#您在控制台创建的Topic Topic=xxx #公测url URL=http://publictest-rest.ons.aliyun.com #阿里云身份验证码 Ak=xxx #阿里云身份验证密钥 Sk=xxx #MQ控制台创建的Producer ID ProducerID=xxx #MQ控制台创建的Consumer ID ConsumerID=xxx
说明：URL 中的 Key，Tag以及 POST Content-Type 没有任何的限制，只要确保Key 和 Tag 相同唯一即可，可以放在 user.properties 里面。
3. HTTP 发送消息示例代码
您可以按以下说明设置相应参数并测试 HTTP 消息发送功能。 package com.aliyun.openservice.ons.http.demo; import java.nio.charset.Charset; import java.util.Date; import java.util.Properties; import org.eclipse.jetty.client.HttpClient; import org.eclipse.jetty.client.api.ContentProvider; import org.eclipse.jetty.client.api.ContentResponse; import org.eclipse.jetty.client.api.Request; import org.eclipse.jetty.client.util.StringContentProvider; import com.aliyun.openservices.ons.api.impl.authority.AuthUtil; public class HttpProducer { public static String SIGNATURE="Signature"; public static String NUM="num"; public static String CONSUMERID="ConsumerID"; public static String PRODUCERID="ProducerID"; public static String TIMEOUT="timeout"; public static String TOPIC="Topic"; public static String AK="AccessKey"; public static String BODY="body"; public static String MSGHANDLE="msgHandle"; public static String TIME="time"; public static void main(String[] args) throws Exception { HttpClient httpClient=new HttpClient(); httpClient.setMaxConnectionsPerDestination(1); httpClient.start(); Properties properties=new Properties(); properties.load(HttpProducer.class.getClassLoader().getResourceAsstream("user.properties")); String topic=properties.getProperty("Topic"); //请在user.properties配置您的Topic String url=properties.getProperty("URL");//公测集群配置为http://publictest-rest.ons.aliyun.com/ String ak=properties.getProperty("Ak");//请在user.properties配置您的Ak String sk=properties.getProperty("Sk");//请在user.properties配置您的Sk String pid=properties.getProperty("ProducerID");//请在user.properties配置您的Producer ID String date=String.valueOf(new Date().getTime()); String sign=null; String body="hello ons http"; String NEWLINE="n"; String signString; for (int i = 0; i
4. HTTP接收消息示例代码
请按以下说明设置相应参数并测试 HTTP 消息接收功能。
package com.aliyun.openservice.ons.http.demo; import java.nio.charset.Charset; import java.util.Date; import java.util.List; import java.util.Properties; import org.eclipse.jetty.client.HttpClient; import org.eclipse.jetty.client.api.ContentProvider; import org.eclipse.jetty.client.api.ContentResponse; import org.eclipse.jetty.client.api.Request; import org.eclipse.jetty.client.util.StringContentProvider; import org.eclipse.jetty.http.HttpMethod; import com.alibaba.fastjson.JSON; import com.aliyun.openservice.ons.mqtt.demo.MqttProducer; import com.aliyun.openservices.ons.api.impl.authority.AuthUtil; public class HttpConsumer { public static String SIGNATURE="Signature"; public static String NUM="num"; public static String CONSUMERID="ConsumerID"; public static String PRODUCERID="ProducerID"; public static String TIMEOUT="timeout"; public static String TOPIC="Topic"; public static String AK="AccessKey"; public static String BODY="body"; public static String MSGHANDLE="msgHandle"; public static String TIME="time"; public static void main(String[] args) throws Exception { HttpClient httpClient=new HttpClient(); httpClient.setMaxConnectionsPerDestination(1); httpClient.start(); Properties properties=new Properties(); properties.load(HttpConsumer.class.getClassLoader().getResourceAsstream("user.properties")); String topic=properties.getProperty("Topic"); //请在user.properties配置您的topic String url=properties.getProperty("URL");//公测集群配置为http://publictest-rest.ons.aliyun.com/ String ak=properties.getProperty("Ak");//请在user.properties配置您的Ak String sk=properties.getProperty("Sk");//请在user.properties配置您的Sk String cid=properties.getProperty("ConsumerID");//请在user.properties配置您的Consumer ID String date=String.valueOf(new Date().getTime()); String sign=null; String NEWLINE="n"; String signString; System.out.println(NEWLINE+NEWLINE); while (true) { try { date=String.valueOf(new Date().getTime()); Request req=httpClient.POST(url+"message/?topic="+topic+"&time="+date+"&num="+32); req.method(HttpMethod.GET); ContentResponse response; signString=topic+NEWLINE+cid+NEWLINE+date; sign=AuthUtil.calSignature(signString.getBytes(Charset.forName("UTF-8")), sk); req.header(SIGNATURE, sign); req.header(AK, ak); req.header(CONSUMERID, cid); long start=System.currentTimeMillis(); response=req.send(); System.out.println("get cost:"+(System.currentTimeMillis()-start)/1000 +" "+response.getStatus()+" "+response.getContentAsstring()); List list = null; if (response.getContentAsstring()!=null&&!response.getContentAsstring().isEmpty()) { list=JSON.parseArray(response.getContentAsstring(), SimpleMessage.class); } if (list==null||list.size()==0) { Thread.sleep(100); continue; } System.out.println("size is :"+list.size()); for (SimpleMessage simpleMessage : list) { date=String.valueOf(new Date().getTime()); System.out.println("receive msg:"+simpleMessage.getBody()+" born time "+simpleMessage.getBornTime()); req=httpClient.POST(url+"message/?msgHandle="+simpleMessage.getMsgHandle()+"&topic="+topic+"&time="+date); req.method(HttpMethod.DELETE); signString=topic+NEWLINE+cid+NEWLINE+simpleMessage.getMsgHandle()+NEWLINE+date; sign=AuthUtil.calSignature(signString.getBytes(Charset.forName("UTF-8")), sk); req.header(SIGNATURE, sign); req.header(AK, ak); req.header(CONSUMERID, cid); response=req.send(); System.out.println("delete msg:"+response.toString()); } Thread.sleep(100); } catch (Exception e) { e.printstacktrace(); } } } }
5. HTTP示例程序工具类
(1)消息封装类: SimpleMessage.java
package com.aliyun.openservice.ons.http.demo; public class SimpleMessage { private String body; private String msgid; private String bornTime; private String msgHandle; private int reconsumeTimes; private String tag; public void setTag(String tag) { this.tag = tag; } public String getTag() { return tag; } public int getReconsumeTimes() { return reconsumeTimes; } public void setReconsumeTimes(int reconsumeTimes) { this.reconsumeTimes = reconsumeTimes; } public void setMsgHandle(String msgHandle) { this.msgHandle = msgHandle; } public String getMsgHandle() { return msgHandle; } public String getBody() { return body; } public void setBody(String body) { this.body = body; } public String getMsgid() { return msgid; } public void setMsgid(String msgid) { this.msgid = msgid; } public String getBornTime() { return bornTime; } public void setBornTime(String bornTime) { this.bornTime = bornTime; } }
(2)字符串签名类: MD5.java
package com.aliyun.openservice.ons.http.demo; import java.io.UnsupportedEncodingException; import java.nio.charset.Charset; import java.security.MessageDigest; import java.sql.sqlException; import java.util.Date; import java.util.HashMap; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.locks.reentrantlock; import org.slf4j.LoggerFactory; public class MD5 { private static final org.slf4j.Logger log = LoggerFactory.getLogger(MD5.class); private static char[] digits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; private static Map rDigits = new HashMap(16); static { for (int i = 0; i >> 4]; out[j++] = digits[0x0F & bt[i]]; } if (log.isDebugEnabled()) { log.debug("[hash]" + new String(out)); } return new String(out); } public byte[] string2bytes(String str) { if (null == str) { throw new NullPointerException("Argument is not allowed empty"); } if (str.length() != 32) { throw new IllegalArgumentException("String length must equals 32"); } byte[] data = new byte[16]; char[] chs = str.tochararray(); for (int i = 0; i
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