Java 2 Book

Last year in the investigation of a lot of java applications, see some of the phenomenon is the programmer to run on their own environment to read the program rarely lead to troubleshooting problems will be more frustrating, so think of writing this series of articles, procedures To provide functionality to end-users, the code is only one part of it, and it needs to be relied on for jvm, os, server hardware, networking, load balancing, etc. In this series of articles, Several parts, more is only a science role, because os I use are linux, this series ...

Managing gigabytes for Java 4.0 publishes a Java search engine is a highly 17813.html "> customizable, High-performance, Full-text, large document collection of Java search engines." It provides State-of-the-art functions (such as bm25/bm25f) and new research algorithms. Although mg4j (managing gigabytes for Java) is not one like Lucene, Egothor and Xapia ...

This paper is an excerpt from the book "The Authoritative Guide to Hadoop", published by Tsinghua University Press, which is the author of Tom White, the School of Data Science and engineering, East China Normal University. This book begins with the origins of Hadoop, and integrates theory and practice to introduce Hadoop as an ideal tool for high-performance processing of massive datasets. The book consists of 16 chapters, 3 appendices, covering topics including: Haddoop;mapreduce;hadoop Distributed file system; Hadoop I/O, MapReduce application Open ...

This paper is an excerpt from the book "The Authoritative Guide to Hadoop", published by Tsinghua University Press, which is the author of Tom White, the School of Data Science and engineering, East China Normal University. This book begins with the origins of Hadoop, and integrates theory and practice to introduce Hadoop as an ideal tool for high-performance processing of massive datasets. The book consists of 16 chapters, 3 appendices, covering topics including: Haddoop;mapreduce;hadoop Distributed file system; Hadoop I/O, MapReduce application Open ...

This article also demonstrates how to use the above three methods in your project and the scenarios that are appropriate for each method. Web Services is a http://www.aliyun.com/zixun/aggregation/14107.html "> Service-Oriented architecture that provides services through standard WEB protocols to ensure that application services on different platforms can interoperate. Web Services (Web service) is a service based on XML and HTTP communication ...

In Java Web Development, it is often necessary to export a large amount of data to http://www.aliyun.com/zixun/aggregation/16544.html ">excel, using POI, JXL directly generate Excel, 　　It is easy to cause memory overflow. 　　1, there is a way, is to write data in CSV format file. 　　1 CSV file can be opened directly with Excel. 2 Write CSV file efficiency and write TXT file efficiency ...

Jooq is a Java class library that efficiently incorporates complex SQL, type safety, source code generation, activity logging, stored procedures, and advanced http://www.aliyun.com/zixun/aggregation/18278.html > Data types. The Jooq 2.0.0 version is a problem-solving version, and the issue of access to the user's needs has been resolved. Sample code: Create.select (first_name, last_name,...

Jooq is a Java class library capable of efficiently merging complex SQL, type safety, source code generation, activity records, stored procedures, and advanced http://www.aliyun.com/zixun/aggregation/18278.html > Data types. Jooq 2.0.4 This release introduces a number of improvements to source code generation. Improved integration of Oracle table and Varray types. Model Code: Create.select (First_n ...)

Jooq 1.6.7 coincides with this release to launch a new website. In addition to the new convenience method, the main addition of a Jooq-codegen maven plug-in. Sample code: Create.select (first_name, last_name, Create.count ()) &http://www.aliyun.com/zixun/aggregation/37954.html ">nbsp; &...

To use Hadoop, data consolidation is critical and hbase is widely used. In general, you need to transfer data from existing types of databases or data files to HBase for different scenario patterns. The common approach is to use the Put method in the HBase API, to use the HBase Bulk Load tool, and to use a custom mapreduce job. The book "HBase Administration Cookbook" has a detailed description of these three ways, by Imp ...