一步步调通Openfire3.10.2+Smack4.1.4官方Demo

￡神魔★判官ぃ 2023-10-16 22:22 11阅读 0赞

##### 首先在电脑上安装Openfire服务器（本文安装的版本为Openfire 3.10.2） #####

Openfire下载地址[http://www.igniterealtime.org/downloads/index.jsp][http_www.igniterealtime.org_downloads_index.jsp]  
本文Openfire服务器名称为192.169.20.246  
Smack 4.1.4的官方文档下载地址包括jar包和javadoc（官方给的解释Easy to use Java XMPP client library.）  
[http://www.igniterealtime.org/downloads/download-landing.jsp?file=smack/smack\_4\_1\_4.zip][http_www.igniterealtime.org_downloads_download-landing.jsp_file_smack_smack_4_1_4.zip]

下载Smack之后从文档smack\_4\_1\_4/releasedocs/documentation/index.html给的示例

// Create a connection to the gwcheng-pc server on a specific port.
 XMPPTCPConnectionConfiguration config = XMPPTCPConnectionConfiguration.builder()
 .setUsernameAndPassword("wangzheng", "wz20120404")
 .setServiceName("192.169.20.246")
 .setHost("192.169.20.246")
 .build();
 AbstractXMPPConnection conn2 = new XMPPTCPConnection(config);
 conn2.connect();

建立一个java工程，拷贝smack\_4\_1\_4\\libs\\下的jar包到自己的工程里。

运行上面的代码（代码中”wangzheng”和"wz20120404"是我在openfire中注册的用户名和密码”192.169.20.246”为我的openfire服务器名称 ）  
运行上面的程序，会报如下的错误

Exception in thread "main" java.lang.NoClassDefFoundError: org/xmlpull/v1/XmlPullParserFactory
        Caused by: java.lang.ClassNotFoundException: org.xmlpull.v1.XmlPullParserFactory

这个错误很明显是缺少jar包 xmlpull.jar，此处导入xmlpull-1.1.3.1.jar  
导入之后运行还是会报错

Exception in thread "main" java.lang.ExceptionInInitializerError
        Caused by: java.lang.IllegalStateException: org.xmlpull.v1.XmlPullParserException: caused by: org.xmlpull.v1.XmlPullParserException: resource not found: /META-INF/services/org.xmlpull.v1.XmlPullParserFactory make sure that parser implementing XmlPull API is available
        Caused by: org.xmlpull.v1.XmlPullParserException: caused by: org.xmlpull.v1.XmlPullParserException: resource not found: /META-INF/services/org.xmlpull.v1.XmlPullParserFactory make sure that parser implementing XmlPull API is available

这种错误还是缺少jar包 kxml.jar，此处导入kxml2-2.3.0.jar  
导入之后运行还是会报错

Exception in thread "main" java.lang.NoClassDefFoundError: de/measite/minidns/DNSCache
        Caused by: java.lang.ClassNotFoundException: de.measite.minidns.DNSCache

继续导入jar包 minidns.jar，此处导入minidns-0.1.7.jar  
导入之后运行还是会报错

Exception in thread "main" java.lang.NoClassDefFoundError: org/jxmpp/util/cache/ExpirationCache
        Caused by: java.lang.ClassNotFoundException: org.jxmpp.util.cache.ExpirationCache

继续导入jar包 jxmpp-core-0.5.0-alpha6.jar和 jxmpp-util-cache-0.4.0-alpha1.jar  
导入之后运行还是会报错

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/http/conn/ssl/StrictHostnameVerifier
        Caused by: java.lang.ClassNotFoundException: org.apache.http.conn.ssl.StrictHostnameVerifier

继续导入jar包 httpclient-4.4.1.jar  
导入之后运行还是会报错

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
        Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory

继续导入jar包 commons-logging-1.2.jar  
导入之后运行还是会报错

org.jivesoftware.smack.SmackException: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
            Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
            Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

这个错误造成的原因是：Openfire 服务器（安全设置问题），这个安全证书问题，我会单独抽出来，进行详细的说明。

openfire服务器端解决办法：  
“服务器设置”－－“安全设置”－－－将“客户端安全联接”中由“非必须”，修改为“自定义”，另外把“旧的SSL方式”和“TLS方式”都设置为无效。

![Center][]

至此，我们完成了XMPP服务开发第一步：XMPP服务器连接

package com.openfire.util;
    
    import java.io.IOException;
    
    import org.jivesoftware.smack.AbstractXMPPConnection;
    import org.jivesoftware.smack.SmackException;
    import org.jivesoftware.smack.XMPPException;
    import org.jivesoftware.smack.tcp.XMPPTCPConnection;
    import org.jivesoftware.smack.tcp.XMPPTCPConnectionConfiguration;
    
    public class ConnectionUtil {
    	//简单连接
    	public boolean connect(String username,String password,String serverName){	
    		boolean target=false;
    		XMPPTCPConnectionConfiguration config = XMPPTCPConnectionConfiguration.builder()
    				  .setUsernameAndPassword(username, password)
    				  .setServiceName(serverName)
    				  .setHost(serverName)
    				  .setPort(5222)
    				  .build();
    		AbstractXMPPConnection conn = new XMPPTCPConnection(config);
    		try {
    			conn.connect();
    			target = conn.isConnected();
    			if(target){
    				System.out.println("XMPP 服务器连接成功");
    			}else{
    				System.out.println("XMPP 服务器连接不成功");
    			}
    		} catch (SmackException | IOException | XMPPException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		return target;
    		
    	}
    
    }

package com.openfire.main;
    
    import com.openfire.util.ConnectionUtil;
    
    public class ConnectionTest {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    		ConnectionUtil connection=new ConnectionUtil();
    		connection.connect("wangzheng", "wz20120404", "192.169.20.246");
    	}
    
    }

[http_www.igniterealtime.org_downloads_index.jsp]: http://www.igniterealtime.org/downloads/index.jsp
[http_www.igniterealtime.org_downloads_download-landing.jsp_file_smack_smack_4_1_4.zip]: http://www.igniterealtime.org/downloads/download-landing.jsp?file=smack/smack_4_1_4.zip
[Center]: https://img-blog.csdn.net/20151023014709696?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center