java - Error using HtmlUnit 2.18 for crawl webpages -

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i have following code:

webclient webclient = new webclient(browserversion.getdefault()); htmlpage page; list<htmlanchor> anchor=new arraylist<htmlanchor>();  try {     system.out.println("querying");     page = webclient.getpage("https://www.amazon.com/gp/goldbox");     anchor = page.getanchors();     for(htmlanchor s:anchor)     {       system.out.println(s.getattribute("href"));     }     system.out.println("success"); }

querying

exception in thread "main" java.lang.nosuchfielderror: instance     @ org.apache.http.impl.io.defaulthttprequestwriterfactory.<init>(defaulthttprequestwriterfactory.java:52)     @ org.apache.http.impl.io.defaulthttprequestwriterfactory.<init>(defaulthttprequestwriterfactory.java:56)     @ org.apache.http.impl.io.defaulthttprequestwriterfactory.<clinit>(defaulthttprequestwriterfactory.java:46)     @ org.apache.http.impl.conn.managedhttpclientconnectionfactory.<init>(managedhttpclientconnectionfactory.java:82)     @ org.apache.http.impl.conn.managedhttpclientconnectionfactory.<init>(managedhttpclientconnectionfactory.java:95)     @ org.apache.http.impl.conn.managedhttpclientconnectionfactory.<init>(managedhttpclientconnectionfactory.java:104)     @ org.apache.http.impl.conn.managedhttpclientconnectionfactory.<clinit>(managedhttpclientconnectionfactory.java:62)     @ org.apache.http.impl.conn.poolinghttpclientconnectionmanager$internalconnectionfactory.<init>(poolinghttpclientconnectionmanager.java:572)     @ org.apache.http.impl.conn.poolinghttpclientconnectionmanager.<init>(poolinghttpclientconnectionmanager.java:174)     @ org.apache.http.impl.conn.poolinghttpclientconnectionmanager.<init>(poolinghttpclientconnectionmanager.java:158)     @ org.apache.http.impl.conn.poolinghttpclientconnectionmanager.<init>(poolinghttpclientconnectionmanager.java:149)     @ org.apache.http.impl.conn.poolinghttpclientconnectionmanager.<init>(poolinghttpclientconnectionmanager.java:125)     @ com.gargoylesoftware.htmlunit.httpwebconnection.createconnectionmanager(httpwebconnection.java:972)     @ com.gargoylesoftware.htmlunit.httpwebconnection.getresponse(httpwebconnection.java:161)     @ com.gargoylesoftware.htmlunit.webclient.loadwebresponsefromwebconnection(webclient.java:1321)     @ com.gargoylesoftware.htmlunit.webclient.loadwebresponse(webclient.java:1238)     @ com.gargoylesoftware.htmlunit.webclient.getpage(webclient.java:346)     @ com.gargoylesoftware.htmlunit.webclient.getpage(webclient.java:415)     @ com.gargoylesoftware.htmlunit.webclient.getpage(webclient.java:400)     @ crawler.htmlunitcrawl.main(htmlunitcrawl.java:29)

what might mistake?

you have conflicting classpath, code works fine clean installation.

please remove httpcomponents .jars, , use provided htmlunit.

also, can see version used by:

    class<?> klass = defaulthttprequestwriterfactory.class;     string location = klass.getprotectiondomain().getcodesource().getlocation().tostring();     system.out.println(location);

which should give location of httpcore-4.4.1.jar in case.


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