线程“main”中的异常java.lang.NoClassDefFoundError：org / apache / commons / codec / DecoderException

我尝试通过Solrj查询Solr

这是我的代码

public class ReadFromSolr {

public static void main(String[] args) throws MalformedURLException,SolrserverException 
{
     String url = "http://localhost:8983/solr";
      try{
     Solrserver server = new CommonsHttpSolrserver(url);
     ModifiableSolrParams params = new ModifiableSolrParams();
       params.set("qt","/select");
        params.set("q","name");

            QueryResponse response = server.query(params);

            System.out.println("response = " + response);

      }

         catch (MalformedURLException ex) {
            ex.printstacktrace();
        } 
      catch (SolrserverException ex) {
            ex.printstacktrace();
        } 


}

}

它给了我一个例外

PS.我的peoject中有以下罐子：

** apache – commons-logging,
* httpclient -4.2,
httpcore 4.2.1,
slf4j – api 1.6.2,
apache – solr – solrj -1.4.0 ***

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/codec/DecoderException
        at org.apache.commons.httpclient.HttpMethodBase.<init>(HttpMethodBase.java:220)
        at org.apache.commons.httpclient.methods.getmethod.<init>(getmethod.java:89)
        at org.apache.solr.client.solrj.impl.CommonsHttpSolrserver.request(CommonsHttpSolrserver.java:288)
        at org.apache.solr.client.solrj.impl.CommonsHttpSolrserver.request(CommonsHttpSolrserver.java:243)
        at org.apache.solr.client.solrj.request.QueryRequest.process(QueryRequest.java:89)
        at org.apache.solr.client.solrj.solrserver.query(Solrserver.java:118)
        at com.gismo.ReadFromSolr.main(ReadFromSolr.java:27)
    Caused by: java.lang.classNotFoundException: org.apache.commons.codec.DecoderException
        at java.net.urlclassloader$1.run(UnkNown Source)
        at java.net.urlclassloader$1.run(UnkNown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.urlclassloader.findClass(UnkNown Source)
        at java.lang.classLoader.loadClass(UnkNown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(UnkNown Source)
        at java.lang.classLoader.loadClass(UnkNown Source)

解决方法

类路径上需要 commons-codec.jar.

原文地址：https://www.jb51.cc/java/125399.html