一、環境搭建

wget http://download.zeromq.org/zeromq-2.1.7.tar.gz tar -xzf zeromq-2.1.7.tar.gz cd zeromq-2.1.7 ./configure make sudo make installgit clone https://github.com/nathanmarz/jzmq.git cd jzmq ./autogen.sh ./configure make sudo make install如果沒有安裝libtool、libuuid-devel則需要先安裝，否則安裝失敗 yum install libtool yum install libuuid-devel

常見問題：

出現java.lang.UnsatisfiedLinkError: /usr/local/lib/libjzmq.so.0.0.0: libzmq.so.1: cannot open shared object file: No such file or directory異常?
原因是未找到zmq動態鏈接庫。?
解決方法1：export LD_LIBRARY_PATH=/usr/local/lib?
解決方法2：編輯/etc/ld.so.conf文件，增加一行：/usr/local/lib。再執行sudo ldconfig命令?

Exception in thread "main" java.lang.UnsatisfiedLinkError: no jzmq in java.library.path?
未設置native library?
在eclipse設置native library為/usr/local/lib?
或在jvm增加參數?
-Djava.library.path=/usr/local/lib?
或在啟動腳本中增加?
java -Djava.library.path=/usr/local/lib

二、使用jzmq進行編程

????1.創建maven項目，pom.xml的內容參見pom.xml

? ? ? 注意：jzmq的版本不能太高，建議使用2.1.0，目前storm也是使用這個版本的jzmq-2.1.0.jar

? ? ? 否則報：?java.lang.UnsatisfiedLinkError: org.zeromq.ZMQ$Socket.nativeInit()V

????2.編寫Publisher.java,Subscriber.java,參見源代碼

? ? Publisher.java ?

package com.catt.mqtest.pubsub;import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.zeromq.ZMQ; import org.zeromq.ZMQ.Context; import org.zeromq.ZMQ.Socket;public class Publisher {// 等待10個訂閱者private static final int SUBSCRIBERS_EXPECTED = 10;// 定義一個全局的記錄器，通過LoggerFactory獲取private final static Logger log = LoggerFactory.getLogger(Publisher.class);public static void main(String[] args) throws InterruptedException{Context context = ZMQ.context(1);Socket publisher = context.socket(ZMQ.PUB);publisher.bind("tcp://*:5557");try {// zmq發送速度太快，在訂閱者尚未與發布者建立聯系時，已經開始了數據發布Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}publisher.send("send start......".getBytes(), 0);for (int i = 0; i < 10; i++) {publisher.send(("Hello world "+i).getBytes(), ZMQ.NOBLOCK);}publisher.send("send end......".getBytes(), 0);publisher.close();context.term();} }

Subscriber.java

package com.catt.mqtest.pubsub;import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.zeromq.ZMQ; import org.zeromq.ZMQ.Context; import org.zeromq.ZMQ.Socket;public class Subscriber {// 定義一個全局的記錄器，通過LoggerFactory獲取private final static Logger log = LoggerFactory.getLogger(Subscriber.class);public static void main(String[] args) {Context context = ZMQ.context(1);Socket subscriber = context.socket(ZMQ.SUB);subscriber.connect("tcp://192.168.230.128:5557");subscriber.subscribe("".getBytes());int total = 0;while (true) {byte[] stringValue = subscriber.recv(0);String string = new String(stringValue);if (string.equals("send end......")) {break;}total++;System.out.println("Received " + total + " updates. :" + string);}subscriber.close();context.term();} }

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.catt</groupId><artifactId>mqtest</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>mqtest</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>org.zeromq</groupId><artifactId>jzmq</artifactId><version>2.1.0</version></dependency><dependency><groupId>ch.qos.logback</groupId><artifactId>logback-classic</artifactId><version>1.1.1</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.10</version><scope>test</scope></dependency></dependencies> </project>

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