Common Utils is a pure Java utility project for faster Java development.
- commons-core Common utilities, including codec collection compress concurrent config file event net stream etc...
- commons-demo Useless, please skip.
- commons-framework Currenty only contain the SEDA framework.
- commons-notify The notify framework based on Zookeeper.
- commons-remote A remote server for developers to look inside the JVM and change the status etc...
- commons-seri Utilities for faster usage of Json Smile Kryo protocol_buffer protocol_stuff
- commons-spring Currently useless, only a email sender helper.
- commons-storage Under development.
For now, commons-core(current 3.X), commons-seri(current 3.X), commons-remote(current 3.X), commons-framework(current 1.X) and commons-notify(current 1.X) are ready for use!!!
Search them in -> maven central <- for the newest version.
Other projects are still stabilizing...
The commons-core project contains so many utilities, so we can not list them one by one. We will list some useful ones here:
- BeanUtil - Convert Java Bean from and to byte array, and merge the details of one Java Bean into another Java bean etc...
- MutableOne, One, Pair, Triple - Java Bean container, mostly for store temporary references as function return value.
- Base16Util - Encode data from and to Base16(Hex) string.
- Base64Util - Encode data from and to Base64(MINE encoding, the default and URL safe format) string.
- IntegerUtil - Encode integer from and to 8, 4, 3, 2 bytes.
- KVBase64Util - Encode a pair of key value data into one Base64(URL safe format) string.
- MD5Util - Calculate MD5 signature and check MD5 signature.
- RSAUtil - Use the RSA algorithm to encode, decode, sign and verify data.
- StringUtil - Encode string to and from bytes as ASCII, UTF8, GBK; join and split string; other related utilities.
- AESCoder - Support encode and decode with the AES algorithm.
- Blowfish2Coder, DESCoder, RC2Coder, TripleDESCoder - Support encode and decode with the corresponding algorithm.
- Cache - The in-memory cache implementation, currently we have ConcurrentLRUCache, LRUHashMap, MapAsCache, SegmentLFUCache.
- CircularList - Store values round-robin. After the list is full, we rewind the pointer to the fist element and replace it and so on.
- CollectionUtil - Utility methods to help operate collections, for example: concat, copy, intersection, isEmpty, isSingle ...
- CyclicIntArray - This class encapsulate an int array, one can get the head and tail at any time. When there are more data than the capacity, we override the eldest element.
- Compressor - Compress and decompress object, byte array, string. Currently we have GZiper and ZLiber.
- JacksonUtil - Using Jackson library to serialize object to JSON and vice-versa.
- Blocker - This is a waiting utility for clients to wait for the response and in the mean time hold the thread.
- BlockThread - The start method will only return if the new thread is running.
- ConcurrentUtil - Init ConcurrentMap and shutdownAndAwaitTermination for ExecutorService.
- InvokableExecutorService - Wrap a standard ExecutorService and can invoke any method on any host object inside the thread pool.
- SimpleFuture - A simple future implementation.
- Syncer - The Syncer is a utility to decorate an object into synchronized object for concurrent use in multiple threads environment.
- ThreadUtil - ThreadGroup related functions, sleep, join, wait related functions.
- PropertiesWrapper - Wrap Java standard Properties, provides convenient methods for accessing trimmed string, int, boolean, long and double values.
- ReloadablePropertiesWrapper - Monitor the changes of the properties file, and reload it.
- FrequencyCheck - Controls the invoke frequency in batch.
- TimeControler - This class control the invoke frequency by time and maximum invoke count.
- ConcurrentEventDispatcher - Dispatch events across multiple threads.
- FileUtil - Get(Set) file contents from(to) local disk.
- DirUtil - Directory related operations.
- FileChannelUtil - Read data from file channel and write into file channel.
- FileMonitor - Monitoring the file changes from the file system and notify users.
- DirMonitor - Monitoring the directory changes from the file system and notify users.
- ConsistentHash - The implementation of consistent hash.
- DoubleHash - The DoubleHash is to replace the ConsistentHash in some conditions.
- DownloadUtil - Download file from HTTP, FTP URL.
- NetUtil - Internet related utilities.
- HTTPUtil - This is a simple HTTP utility for GET and POST requests.
- HTTPClient - This HTTP client class is used to help user control cookie and authentication. It is backed by HTTPUtil.
- RESTClient - A convenient tool class to help you invoke the RESTful API.
- FastFieldUtil, FastMethodUtil, FastNewInstance - Using Reflect ASM to operate on Java bean to achieve high speed.
- FieldUtil, MethodUtil, ProxyUtil - Using Java's Reflection API to operate on Java bean.
- TypeUtil - Functions for type casting, type matching.
- LimitRateInputStream - Restrict the input rate.
- StreamUtil - Some common function for input and output streams.
- OrderedRunner - Run all the test cases marked by this runner in alphabetical order.
- AnnotationOrderedRunner - Run all the test cases marked by this runner in the order specified by the annotation value.
- MappingGenerator - Generate the mapping between DB column name and java field name.
- SQLGenerator - Generate SQL by the corresponding Java entity class.
- Tester - Help check the value equals and between the range.
- TidyUtil - The utility to tidy string, generate formatted string table, etc.
- DateTimeUtil - Translate between string and the java.util.Date.
- MathUtil - calculate max, min, sum, avg, Standard Deviation etc.
- Runner - Run a method in a newly created thread.
- SystemUtil - System Environment and JVM related utility class.
- ThrowableUtil - Get the first root cause, translate the throwable into string and vice-versa.
- CommonStatistics - Calculate the commonly used statistics for a given data set and a given percentile.
The commons-seri project contains tools to serialize Java Beans.
- ProtobufUtil - Serialize Java Beans by Google(R) protocol buffer.
- ProtoStuffUtil - Serialize Java Beans by protocol stuff protocol.
- SmileUtil - Use Jackson Smile as the binary format to serialize objects.
- JsonProxy - This is the proxy for read multiple objects from one input stream.
- KryoInstream, KryoOutstream - The encapsulation of the Kryo serialization algorithm.
- SmileProxy - This is the proxy for read multiple objects from one input stream.
The commons-remote project contains a remote server for developers to look inside the JVM and change the status etc...
- BeanServer - This class will export beans to remote telnet, you can get, list and set properties.
- Invokable - Implement this interface then your code can be invoked from Bean Server.
- Monitor - Monitor the system internal status.
Currently only contains the SEDA framework implementation.
The notify framework based on Zookeeper.
- Elector - This Elector is for P2P nodes elect one leader.
- ZKLock - The DistributedLock powered by Zookeeper.
- Notify - Watch the changes of node data and node properties.
- ZKBlockingQueue - The distributed blocking queue implementation powered by Zookeeper.
This project is under the Apache License, version 2.0 http://www.apache.org/licenses/LICENSE-2.0