java - LDAP 身份验证问题 : java. lang.IncompleteClassChangeError

Question

我有一个类，允许我使用 LDAP 进行身份验证。当我在只有一个类的项目中运行此代码时(出于测试原因)，我没有遇到问题，并且它返回一个 boolean 值，正如预期的那样，但是当我在我正在工作的项目中运行它时，我得到了出现以下错误:

java.lang.IncompatibleClassChangeError: Class org.apache.mina.filter.codec.ProtocolCodecFilter does not implement the requested interface org.apache.mina.core.filterchain.IoFilter

这是允许我进行身份验证的方法:

public static void autenticarUsuario(String usuar, String password) throws LdapException, CursorException{       

    Dn user = Dn.EMPTY_DN;
    try{
        BasicConfigurator.configure();
    LdapConnectionConfig config = new LdapConnectionConfig();
    config.setLdapHost(SERVER_IP);
    config.setLdapPort(PORT);
    config.setName("uid=ldapsearch,ou=System,ou=Users,dc=fiec,dc=espol,dc=edu,dc=ec");
    config.setCredentials(CREDENTIALS);        
    conn = new LdapNetworkConnection(config);
    }catch(Exception e){            
    }
    String s1 = usuar;
    String s2 = password;

    //System.out.println("Nombre: "+s1+"  Contra: "+s2);
    try {
        conn.bind();
        System.out.println(conn.isAuthenticated());            
        // Create the SearchRequest object
        SearchRequest req = new SearchRequestImpl();
        req.setScope( SearchScope.SUBTREE );
        req.addAttributes( "*" );
        req.setTimeLimit( 0 );
        req.setBase( new Dn( "ou=Users,dc=fiec,dc=espol,dc=edu,dc=ec" ) );
        req.setFilter( "(uid="+ s1 +")" );

        // Process the request
        SearchCursor searchCursor = conn.search( req );

        while ( searchCursor.next() )
        {
            Response r = searchCursor.get();
            if(r instanceof SearchResultEntry){
                Entry re = ((SearchResultEntry) r).getEntry();
                user = re.getDn();
            }
        }

        conn.bind(user, s2);
        //return(conn.isAuthenticated());
        inLDAP = conn.isAuthenticated();             
    } catch (InvalidConnectionException ex) {
        //System.out.println(ex);
    }        
    catch (LdapException e) {       
        e.printStackTrace();
    } catch (CursorException e) {           
        e.printStackTrace();        
     }
    inLDAP = false; 
}

我正在处理的项目是一个JAVAFX应用程序，但是这个方法是在一个不是从应用程序扩展的类中调用的(只是用于验证用户凭据的java代码)。

这是堆栈跟踪:

Exception in thread "pool-1-thread-1" java.lang.IncompatibleClassChangeError: Class org.apache.mina.filter.codec.ProtocolCodecFilter does not implement the requested interface org.apache.mina.core.filterchain.IoFilter
at org.apache.mina.core.filterchain.DefaultIoFilterChain.register(DefaultIoFilterChain.java:267)
at org.apache.mina.core.filterchain.DefaultIoFilterChain.addLast(DefaultIoFilterChain.java:174)
at org.apache.mina.core.filterchain.DefaultIoFilterChainBuilder.buildFilterChain(DefaultIoFilterChainBuilder.java:436)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.addNow(AbstractPollingIoProcessor.java:528)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.handleNewSessions(AbstractPollingIoProcessor.java:501)
at org.apache.mina.core.polling.AbstractPollingIoProcessor.access$400(AbstractPollingIoProcessor.java:67)
at org.apache.mina.core.polling.AbstractPollingIoProcessor$Processor.run(AbstractPollingIoProcessor.java:1116)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source) 

这些是我正在使用的库:

import org.apache.directory.api.ldap.model.cursor.CursorException;
import org.apache.directory.api.ldap.model.cursor.SearchCursor;
import org.apache.directory.api.ldap.model.entry.Entry;
import org.apache.directory.api.ldap.model.exception.LdapException;
import org.apache.directory.api.ldap.model.message.Response;
import org.apache.directory.api.ldap.model.message.SearchRequest;
import org.apache.directory.api.ldap.model.message.SearchRequestImpl;
import org.apache.directory.api.ldap.model.message.SearchResultEntry;
import org.apache.directory.api.ldap.model.message.SearchScope;
import org.apache.directory.api.ldap.model.name.Dn;
import org.apache.directory.ldap.client.api.LdapConnection;
import org.apache.directory.ldap.client.api.LdapConnectionConfig;
import org.apache.mina.*;
import org.apache.directory.ldap.client.api.LdapNetworkConnection;
import org.apache.directory.ldap.client.api.exception.InvalidConnectionException;
import org.apache.log4j.BasicConfigurator;

我不知道为什么会发生这种情况，如果您能提前提供帮助，我将不胜感激

Answer 1

是版本问题。在 Mina 1.0 和 Mina 2.0 之间，他们将 IoFilter 接口(interface)(除其他外)从 org.apache.mina.filterchain 移至 org.apache.mina.core .filterchain。我认为您正在尝试将为 Mina 2.0 编译的代码与 Mina 1.0 实现一起使用。

解决方案:检查您的构建和运行时类路径以及依赖项，以找出这是如何发生的......并修复不一致的问题。