apache-commons

问题 I was wondering what are key differences between Guava vs Apache Commons with respect to equals and hashCode builders. equals : Apache Commons: public boolean equals(Object obj) { if (obj == null) { return false; } if (obj == this) { return true; } if (obj.getClass() != getClass()) { return false; } MyClass other = (MyClass) obj; return new EqualsBuilder() .appendSuper(super.equals(obj)) .append(field1, other.field1) .append(field2, other.field2) .isEquals(); } Guava: public boolean equals

问题 I have to take an ArrayList of HashMap and create a CSV using Apache Commons CSV. However, it's not writing the values to the right headers. Is there an easy way to have the library automatically place the values to the right headers using the Enum? I don't want to manually assign it as I will be adding more columns. This is what it's producing: Here is what I have: Header.java public enum Header { FIRST_NAME(), LAST_NAME(), GENDER(); } Main public static void main(String[] args) { List<Map

问题 android studio 3.6 in build.gradle: compileOptions { targetCompatibility JavaVersion.VERSION_1_8 sourceCompatibility JavaVersion.VERSION_1_8 } api 'org.apache.commons:commons-io:1.3.2' in my code import org.apache.commons.io.FileUtils import java.io.* import java.nio.charset.StandardCharsets val file = File(folderPath + File.separator + resultFileName) FileUtils.writeStringToFile( file, fileContents, StandardCharsets.UTF_8.toString() ) but I get error: java.nio.charset.CharsetICU[UTF-8] java

问题 Here's my scenario: some email sending bean gets called with a bunch of parameters needed for mail construction. it creates MultiPartEmail and queues it for sending which is done by separate thread on the background, caller doesn't care if it was sent or not. the delivering thread picks up queued email instance and does email.send() - so off it goes. when delivery fails, the bean will try re-sending the mail every 5 minutes for three times and then give up. Question: I can't figure out how to

问题 I'm supporting a web application / Java servlet that has been failing to start. The issue turns out to be a relatively straight-forward java.lang.NoClassDefFoundError exception, thrown by org.apache.webapp.balancer.RulesParser . The filter class that throws the exception expects the Digester class to exist in the package: org/apache/tomcat/util/digester That package doesn't appear to exist in the application lib, but there is an instance of the class in: org/apache/commons/digester Which is

问题 i am trying to use apache commons collections and predicate as follows: List<Cat> bigList = ....; // master list Collection<Cat> smallList = CollectionUtils.select(bigList, new Predicate() { public boolean evaluate(Object o) { Cat c = (Cat)o; return c.getFavoriteFood().equals("Wiskas") && c.getWhateverElse().equals(Something); } }); and the jars I have in my classpath are: commons-beanutils-1.8.3.jar commons-collections-3.1.jar commons-logging-1.1.jar but in runtime I get the following

问题 Does anyone know of a workaround whereby if you are trying to flush the servlet output stream, apache commons fileupload throws the following exception? FileUploadException: Processing of multipart/form-data request failed. Stream ended unexpectedly Basically I have code that loops through each file uploaded using apache commons fileupload, and then am trying to out.flush() some stats about each file. ie: FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new

问题 I'm using commons-lang3-3.0.1.jar, in order to utilise the StrSubstitutor class. Check this out... The following code is called in from my SyncAdapter, it crashes constructing the StrSubstitutor: public static String makeGetPlansQueryString(Bundle params) { Map<String, String> valuesMap = new HashMap<String, String>(); valuesMap.put(REQUEST_PARAM_APIUSERNAME, API_USERNAME); valuesMap.put(REQUEST_PARAM_APIPASSWORD, API_PASSWORD); //... etc. etc. String xmlTemplate = VendApplication.getContext(

问题 I am trying to parse a CSV file as below String NEW_LINE_SEPARATOR = "\r\n"; CSVFormat csvFileFormat = CSVFormat.DEFAULT.withRecordSeparator(NEW_LINE_SEPARATOR); FileReader fr = new FileReader("201404051539.csv"); CSVParser csvParser = csvFileFormat.withHeader().parse(fr); List<CSVRecord> recordsList = csvParser.getRecords(); Now the file got normal lines ending with CRLF characters however for few lines there is additional LF character appearing in middle. i.e. a,b,c,dCRLF --line1 e,fLF,g,h

问题 I am using Apache Commons ftp client to upload a file to a server. If I have a wi-fi connection to my home router all goes well. If I dont have that wi-fi connection the 3G icon appears in the notification bar but the ftp.connect gives an error 'connection reset by peer'. I've googled around for this but not found anything that helps. Is ftpclient not able to work with 3G? 回答1: A regular FTP file transfer (in active mode) uses two connections - one established by the client and one