fitler commons

1 IntroductionCommons Configuration The Software class library provides a common configuration interface that enables Java the application reads the configuration file from a variety of sources. the Commons Configuration provides a simple type of access and a multi-semantic config parameter demonstrated by the following code: Double double = config.getdouble ("number"); Integer integer = Config.getinteger ("number"); Configuration pa

Need to do a httpclient upload, and then snapped online for information1. First used in the system before the Commons-httpclient upload, find the information after a meal change, and then testPostmethod filepost = new Postmethod (URL); Filepost.setparameter ("System", "Vinuxpost"); try {part part[] = Uploadrequesthelper.getpart (request); Filepost.setrequestentity (New Multipartrequestentity (part, Filepost.getparams ())); HttpClient client = new Http

How can we let log4j play its role? The answer is simple, just meet the "log4j jar package" in classpath. As has been said before, Commons-logging will automatically discover and apply log4j. So as long as it exists, it works. (Does it not exist?) Naturally does not work, commons-logging will choose other log implementation classes separately. ） Note: The configuration file log4j.properties is necessary fo

In this example, we use Commons-email to send messages and encapsulate them, support HTML content and attachments, and Commons email is a mail client component under Apache's Commons sub-project, which is based on javamail and greatly simplifies the sending and receiving of messages.The tool class supports multiple senders, multiple cc people, multiple bcc, multi

First, the conceptcommons-logging: Apache provides the earliest log façade interface. Avoid direct coupling to specific log schemes. Similar to the JDBC API interface, the specific JDBC driver implementation is implemented by the respective database providers. It is decoupled through the unified interface, but it also implements some simple log schemes internally.log4j: A classic journaling solution. Inside the log system abstraction encapsulated into logger, appender, pattern and other implemen

Del format is similar to CSV, my test file here Test.del is a set of data from the DB2 database.The MAVEN coordinates of the Apache Commons CSV are: org.apache.commons commons-csv 1.5Test procedure:Package test;import Java.io.File;import Java.io.FileInputStream;import java.io.IOException;import Java.io.InputStream;import Java.io.InputStreamReader;import Java.io.Reader;import java.util.ArrayList;imp

The Apache Commons-fileupload.jar is placed under the web-inf\lib of the application and can be used. The following example describes how to use its file upload feature. The FileUpload version used is 1.2 and the environment is eclipse3.3+myeclipse6.0. FileUpload is based on Commons io, so make sure that the Commons IO jar package (used

Introduction to Apache Commons StringUtilsHot 4 already 1529 read 2012-05-06 21:27 tags: Apache apache commons stringutils Introduction org.apache.commons.lang.StringUtils StringUtils is a tool class in the Apache Commons Lang Library (Http://commons.apache.org/lang), which provides a number of useful ways to handle strings, and this article does not int

Content-disposition:form-data; Name= "username" Zhangsan-----------------------------7dfa01d1908a4 content-disposition:form-data; Name= "Userpass" 1234-----------------------------7dfa01d1908a4 Content-disposition:form-data; Name= "filename1"; Filename= "C:\Users\ASUS\Desktop\upload.txt" Content-type:text/plain This is a-a-content! -----------------------------7dfa01d1908a4 Content-disposition:form-data; Name= "filename1"; Filename= "C:\Users\ASUS\Desktop\upload2.txt" Content-type:text/plain th

First, the principle of File upload analysis 　　　　1, file upload the necessary prerequisite A, form's method must be post B, the Enctype property of the form must be of type Multipart/form-data. Enctype Default value: application/x-www-form-urlencoded Function: Inform the server of the MIME type of the request body Application/x-www-form-urlencoded:username=abcpassword=123 Servletrequest.getparameter (String name), which is a method that reads the type specifically Multipart/form-data:

Apache The Apache Commons is a very useful toolkit for solving a variety of practical common problems, and here is a summary table with details to visit http://jakarta.apache.org/commons/index.html Beanutilscommons-beanutils provides packaging for Java reflection and introspection APIs BETWIXTBETWIXT provides services that map JavaBean to XML documents and the opposite mappings. Chainchain provides a "re

To tell you the truth, JCL (Jakarta Commons Logging) and log4j really got me. Not all do log, how in the JCL source package, there is a log4j package. Who's with whom? To see the JCL User's guide, to understand some. Hehe. 1, Commons-loggin introduction Jakarta Commons Logging (JCL) provides a log (logging) interface (interface), taking into account both lig

For java. lang. NoClassDefFoundError: org/apache/commons/collections/FastHashMap During Java EE development, when data in the configuration file or user form submitted data is encapsulated in the corresponding attributes of the corresponding JavaBean object: in actual development, use the third method toolkit BeanUtils (the commons-beanutils-xxx.jar depends on the comm