apache commons codec

Use APACHE-commons-fileupload to write a JSP file to be uploaded You need to download the fileupload and beanutils packages. The Code is as follows. String mkdir (string path ){ String MSG = NULL;Java. Io. File dir; // Create a file objectDir = new java. Io. File (PATH );If (DIR = NULL ){MSG = "error cause: Return MSG;}If (dir. isfile ()){MSG = "error cause: Return MSG;}If (! Dir. exists

Because the FTP operation is needed in the recent work, and there is no existing FTP code on hand. Went online to find a bit, found that everyone using Apache Commons-net Library in the ftpclient.However, the feeling is not very convenient to use. And found a lot of packages on the Internet. I think it's not very useful. So I wrote one of my own. Most of the examples on the web are directly manipulating fil

(P.getcolumndimension ());//2//Invert p, using LudecompositionRealmatrix Pinverse =newludecomposition (P). Getsolver (). Getinverse (); System. out. println (Pinverse); The result of the operation is as follows: min:0.27333Max:1.33mean:0.46269083333333333Product:2.3429343978460972E-5sum:5.552289999999999Variance:0.08757300031742428 thePercentile value:0.5674000000000001geometric mean:0.4112886050879374skewness:2.670095445623868kurtosis:7.718241303328169Sumofsquares:3.5322966905000004standarddev

Beanlisthandler to implement converting all rows of resultset to the list of person JavaBeans resultsethandler3.3 CustomRowprocessoreach of the provided The Resultsethandler implementation receives a rowprocessor to do the actual conversion of the row-to-object. The default processor is implemented using Basicrowprocessor, but you can implement a custom version of the plugin. Perhaps the most common customization is to implement the Tobean () method to handle custom database data type issues. 3

(command);Executing the bodyDefaultexecutorexec = new Defaultexecutor ();Exec.setexitvalues (NULL);Using a watchdog to set timeoutsExecutewatchdogwatchdog = new Executewatchdog (60000);Exec.setwatchdog (watchdog);Pumpstreamhandlerstreamhandler = new Pumpstreamhandler (Outputstream,errorstream);Exec.setstreamhandler (Streamhandler);Exec.execute (commandline);//executionStringout = outputstream.tostring ("GBK");Stringerror = errorstream.tostring ("GBK");System.out.println (out);SYSTEM.ERR.PRINTLN

Collectionutils provides many ways to manipulate collections , and the common methods are as follows importorg.apache.commons.collections.collectionutils;importjava.util.arraylist;import java.util.list;publicclasscollectionutilstest{public Staticvoidmain (String[]args) {List Apache Commons Collections Collectionutils Tool class simple to use

Org. apache. commons. fileupload. FileUploadBase $ InvalidContentTypeException, apachecommons 1. Error cause org.apache.commons.fileupload.FileUploadBase$InvalidContentTypeException: the request doesn't contain a multipart/form-data or multipart/mixed stream, content type header is nullat org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl. 2. Error cause 3. Solution

When non-built-in objects such as java. SQL. Date are used, this exception occurs if the object is null. The simplest method is to ensure that non-built-in objects are not null. As the demand changes in the project business, there is no guarantee that the built-in objects are not null. Therefore, it is necessary to solve this exception to achieve a general effect. The following is a solution to this exception: /** Time to market */Private java. SQL. Date timeToMarket; // If timeToMarket is null

, Certificateexception, Unrecoverablekeyexception, keymanagementexception {SSLC Ontext Sslcontext; Try { //KeyStore used to store client certificatesKeyStore KeyStore = keystore.getinstance ("PKCS12"); FileInputStream instream=NewFileInputStream (NewFile ("D:\\TEST.P12")); Try{keystore.load (instream,"passwd". ToCharArray ()); } finally{instream.close (); } //load the client certificate and set the HTTPS security protocol to TLSv1.2Sslcontext = Sslcontext

With Apache Commons-net-3.0.1.jar and Log4j-1.2.15.jar, this is a jar bag. packagecom.bjut.edu.cn.ftp; importjava.io.bufferedinputstream; importjava.io.bufferedoutputstream; importjava.io.file; import java.io.fileinputstream; importjava.io.filenotfoundexception; import java.io.fileoutputstream; importjava.io.ioexception; import java.util.timezone; importorg.apache.commons.net.ftp.ftpclient; import org.ap