问题
Do you know how can I turn Warnings, Notes, Errors in HtmlUnit off?
回答1:
Put this somewhere around the start of your code; it will shut its dirty mouth:
LogFactory.getFactory().setAttribute("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.NoOpLog");
java.util.logging.Logger.getLogger("com.gargoylesoftware.htmlunit").setLevel(Level.OFF);
java.util.logging.Logger.getLogger("org.apache.commons.httpclient").setLevel(Level.OFF);
webClient = new WebClient(bv);
webClient.setCssEnabled(false);
webClient.setIncorrectnessListener(new IncorrectnessListener() {
@Override
public void notify(String arg0, Object arg1) {
// TODO Auto-generated method stub
}
});
webClient.setCssErrorHandler(new ErrorHandler() {
@Override
public void warning(CSSParseException exception) throws CSSException {
// TODO Auto-generated method stub
}
@Override
public void fatalError(CSSParseException exception) throws CSSException {
// TODO Auto-generated method stub
}
@Override
public void error(CSSParseException exception) throws CSSException {
// TODO Auto-generated method stub
}
});
webClient.setJavaScriptErrorListener(new JavaScriptErrorListener() {
@Override
public void timeoutError(HtmlPage arg0, long arg1, long arg2) {
// TODO Auto-generated method stub
}
@Override
public void scriptException(HtmlPage arg0, ScriptException arg1) {
// TODO Auto-generated method stub
}
@Override
public void malformedScriptURL(HtmlPage arg0, String arg1, MalformedURLException arg2) {
// TODO Auto-generated method stub
}
@Override
public void loadScriptError(HtmlPage arg0, URL arg1, Exception arg2) {
// TODO Auto-generated method stub
}
});
webClient.setHTMLParserListener(new HTMLParserListener() {
@Override
public void warning(String arg0, URL arg1, int arg2, int arg3, String arg4) {
// TODO Auto-generated method stub
}
@Override
public void error(String arg0, URL arg1, int arg2, int arg3, String arg4) {
// TODO Auto-generated method stub
}
});
webClient.setThrowExceptionOnFailingStatusCode(false);
webClient.setThrowExceptionOnScriptError(false);
回答2:
The code in Arsen Zahray's answer helped in removing almost all the logs generated by HtmlUnit.
But one edit helps to remove them all. Use:
java.util.logging.Logger.getLogger("com.gargoylesoftware").setLevel(Level.OFF);
instead of:
java.util.logging.Logger.getLogger("com.gargoylesoftware.htmlunit").setLevel(Level.OFF);
回答3:
To remove all output from the latest version of HtmlUnit you just have to add these lines in a static block or in your main class:
java.util.logging.Logger.getLogger("com.gargoylesoftware").setLevel(Level.OFF);
System.setProperty("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.NoOpLog");
It is NOT needed to override any method as some other answers state.
回答4:
Here you can get info on how to manipulate logging of HtmlUnit.
This is what I added to my log4j.properties in order to disable verbose debugging messages from HtmlUnit components:
# Set specific logger levels.
log4j.logger.org.mortbay.log=fatal
log4j.logger.org.apache.http=fatal
log4j.logger.org.apache.http.headers=fatal
log4j.logger.org.apache.http.wire=fatal
# For HttpClient 3, which is used by FirefoxDriver
log4j.logger.httpclient.wire=fatal
log4j.logger.org.apache.commons=fatal
log4j.logger.com.gargoylesoftware.htmlunit=fatal
log4j.logger.com.gargoylesoftware.htmlunit.WebTestCase=fatal
# Change this to TRACE when enabling the debugger.
log4j.logger.com.gargoylesoftware.htmlunit.javascript.DebugFrameImpl=fatal
回答5:
Try the following code to turn the logging level down to off:
java.util.logging.Logger.getLogger("com.gargoylesoftware").setLevel(Level.OFF);
回答6:
I am using the code below and it works perfectly:
LogFactory.getFactory().setAttribute("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.NoOpLog");
java.util.logging.Logger.getLogger("com.gargoylesoftware.htmlunit").setLevel(Level.OFF);
java.util.logging.Logger.getLogger("org.apache.commons.httpclient").setLevel(Level.OFF);
回答7:
Just add this string to your log4.properties:
log4j.logger.com.gargoylesoftware.htmlunit=fatal
回答8:
Turn the loggers off. But that is not a good solution, since you might want to have some uncommon issues in the logs.
I know HtmlUnit produces a lot of unimportant exceptions, warnings, etc. You can suppress of few of those using:
client.getOptions().setThrowExceptionOnFailingStatusCode(false);
client.getOptions().setThrowExceptionOnScriptError(false);
client.getOptions().setPrintContentOnFailingStatusCode(false);
回答9:
Have a look at the docs.
There is a sample log4 file used by the test suite, you can find it here, you can disable everything if you wish.
回答10:
This worked for me:
@Test
public void homePage() throws Exception {
final WebClient webClient = new WebClient();
webClient.setThrowExceptionOnScriptError(false);
final HtmlPage page = webClient.getPage("http://localhost:8080/web/guest/home");
回答11:
Now in HtmlUnit 2.9, WebClient.setCssErrorHandler(new SilentCssErrorHandler()) can conveniently ignore the warnings and errors. For example:
@Override
protected WebClient modifyWebClient(WebClient client) {
// currently does nothing, but may be changed in future versions
WebClient modifiedClient = super.modifyWebClient(client);
modifiedClient.getOptions().setThrowExceptionOnScriptError(false);
modifiedClient.setCssErrorHandler(new SilentCssErrorHandler());
return modifiedClient;
}
回答12:
Try adding this to your code:
LogFactory.getFactory().setAttribute("org.apache.commons.logging.Log", "org.apache.commons.logging.impl.NoOpLog");
Basically, this makes the logger log to NoOpLog, which doesn't write the log information anywhere.
回答13:
One option which worked well for me is to change the HtmlUnit logger to log to a different file just so that I have those errors in case I need to refer it some time and it also doesn't clutter up my main logs.
Below is the log4j change I made to log4j.properties:
log4j.logger.com.gargoylesoftware.htmlunit=ERROR, HTMLUNIT
log4j.additivity.com.gargoylesoftware.htmlunit=false
log4j.appender.HTMLUNIT = org.apache.log4j.RollingFileAppender
log4j.appender.HTMLUNIT.layout=org.apache.log4j.PatternLayout
log4j.appender.HTMLUNIT.layout.ConversionPattern=%m%n
log4j.appender.HTMLUNIT.File=logs/HtmlUnitLog4j.log
log4j.appender.HTMLUNIT.MaxFileSize=5MB
log4j.appender.HTMLUNIT.MaxBackupIndex=5
回答14:
If you don't need JavaScript support, it is the easiest way to disable it:
WebClient client = new WebClient(BrowserVersion.BEST_SUPPORTED);
client.getOptions().setThrowExceptionOnFailingStatusCode(false);
client.getOptions().setPrintContentOnFailingStatusCode(false);
client.getOptions().setThrowExceptionOnScriptError(false);
client.getOptions().setJavaScriptEnabled(false);
client.setCssErrorHandler(new SilentCssErrorHandler());
client.setHTMLParserListener(new HTMLParserListener() {
@Override
public void error(String message, URL url, String html, int line, int column, String key) {
}
@Override
public void warning(String message, URL url, String html, int line, int column, String key) {
}
});
You also disable exceptions and log on failing status codes, JavaScript, CSS errors and HTML parse errors.
If you need JavaScript support you can use a custom implementation for JavaScript errors:
client.setJavaScriptErrorListener(new JavaScriptErrorListener() {
@Override
public void timeoutError(HtmlPage arg0, long arg1, long arg2) {
}
@Override
public void scriptException(HtmlPage arg0, ScriptException arg1) {
}
@Override
public void malformedScriptURL(HtmlPage arg0, String arg1, MalformedURLException arg2) {
}
@Override
public void loadScriptError(HtmlPage arg0, URL arg1, Exception arg2) {
}
});
If you don't need you also can just disable it:
client.getOptions().setCssEnabled(false);
So there is no need to configure any other Logger.
来源：https://stackoverflow.com/questions/3600557/turning-htmlunit-warnings-off