Apache's common logging is a high-level log framework that does not implement real log writing capabilities, but relies on other log systems such as log4j or Java. util. logging. You can use the configuration file to set whether to use log4j or Java. util. logging.
Java. utl. Logging is used by default. If you want to use log4j, You need to configure it in three steps,1. Create a log4j configuration file, such as log4j. proiperties:Log4j. rootlogger = debug, A1Log4j. appender. A1 = org.
When a file item is encapsulated as a fileitem object, if the file size exceeds the critical value, it will be written to a temporary file.
Cleanup method 1
When these temporary files are no longer used (if the corresponding Java. io. file is recyclable, which is better) will be automatically deleted. this will be. apache. commons. io. A harvest thread started by an instance of filecleaningtracker is si
Java executes the external program (Apache Commons Exec), apachecommons
Use runtime.getruntime(cmd.exe c to call an external program. The current thread remains waiting in Tomcat. To solve this problem, the new thread was used to receive output information from external programs. For more information, see the blog http://blog.csdn.net/accountwcx/article/details/46785437.
Later, I found open-source Java on
Document directory
1. commons-io
2. commons-cli
3. commons-Lang
4. commons-Configuration
Recently I wrote a program and found that the Apache commons (http://commons.apache.org/) Library is really good, can simplify a lot
Apache Commons Transaction is designed to provide a lightweight, standardized, and efficient toolkit for multithreaded programming of Java transactions, enabling multilevel locks, transaction sets, and transaction-level file access.The transaction processing system is very familiar to the database users, but if the transaction processing system is transferred from the database to the file system, it is esti
I. Preface
Java code farmers do not know Apache, so they will never miss it. There are many open-source projects under the company, all of which are sky-breaking. Today, let's talk about commons. Click this link to go to the Apache commons homepage, including logging, pool, net, ongl, El, Io, DBCP, email, collection, L
1. New Java project csvexample in Eclipse.
2. Add a CSV file:Create a new CSV file under the "\CSVEXAMPLE\SRC" directory, or copy the CSV file elsewhere to this directory.The contents are as follows:
3. Download the source and extract the Apache Commons CSV:https://commons.apache.org/proper/commons-csv/download_csv.cgiBinaries or source, whichever is OK. I've go
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 t
[DAO] The DAO data layer code based on apache. commons. dbcp, commonsdbcp**************************************** ********************************* *** Original article: blog.csdn.net/clark_xu Xu changliang's column**************************************** ********************************
DAO code is mainly based on the dept (Department List) emp (employee information list) of scott, the default oracle user.
Concept DescriptionApache Commons CLI IntroductionDespite the rapid development of various human-computer interaction technologies, the most traditional command-line pattern is still widely used in various fields: from compiling code to system administration, the command line is favored by its simplicity and efficiency. Various tools and systems provide a detailed user manual, and some provide examples of how to develop it two times. However, there ar
Exception error:
Caused by: Org. apache. commons. DBCP. sqlnestedexception: cannot create poolableconnectionfactory (the database is already in use by another process: Org. HSQLDB. persist. niolockfile @ 4a60a3da: Java. lang. exception: the process cannot access the file because another program has locked part of the file. : D:/Zhao/code/OTAs-ds-workspace/OTAs-ds-server/output/funambol/tools/hypersonic/data
Apache Commons Compress Multiple Denial of Service Vulnerabilities (CVE-2018-1324)Apache Commons Compress Multiple Denial of Service Vulnerabilities (CVE-2018-1324)
Release date:Updated on:Affected Systems:
Apache Group Commons
Apache Commons DbUtils User ManualApache Commons DbUtils user manual I. IntroductionDBUtils is a lightweight JDBC package. Its core feature is to encapsulate the result set on the basis of JDBC, the query result set can be directly encapsulated into a JavaBean to simplify the confusion and repetition of JDBC code.JDBC code development has many difficulties:1) the
OverviewDuring the operation of the project, some operations on the system resource consumption is large, such as the establishment of database connections, the establishment of REDIS connections, and so on, we want to create multiple connection objects at one time, and in the future when we need to use the created connection directly, to improve performance. The pool technology uses pool technology to improve application service performance by initializing some of the more resource-intensive ob
This article introduces how to use the Commons-fileupload.jar,apache Commons-fileupload.jar to realize the uploading function of the file by the example, the concrete contents are as follows
The Apache Commons-fileupload.jar is placed under the web-inf\lib of the applicatio
The most recent development in the project needs to use the Send mail function, when the background timing task after processing to notify the caller. Java Mail API is more cumbersome to use, so here is the Apache Commons email, official website address: http://commons.apache.org/proper/commons-email/,Commons Email The
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