Introduction:
Perl was originally developed for string manipulation and unix scripting in 1987, since then it has evolved and now its mainstream programming language which is used for a wide range of tasks including system administration, web development, network programming and GUI development. The best thing about Perl is that it's easy to use, efficient and complete. It supports both procedural and object-oriented programming (OOP), it has powerful built-in support for text processing as well and it also has impressive collections of third-party modules. Perl comes per-installed on unix systems, if its not or you are using windows system then download its installer and make sure that perl can be found in your system classpath. In this tutorial I have provided enough example code with...
Logging in java Part-2
In the Part-1 I discussed about different logging frameworks in java. In this part I'll discuss about setting up slf4j and logback in your project.
Maven dependencies:
slf4j-api: Contains interfaces for LoggerFactoryBinder, MDCAdaptor and MarkerFactoryBinder which will be implemented by any slf4j compatible logger service like logback. slf4j-api also contains implementation of some features which actual logging framework might not have like MDC.
logback-core: It contains classes and utilities with default and abstract level implementation which is used in logback-classic.
logback-classic: Implementation of slf4j-api, logback-core and logback-classic can be used without slf4j-api in a project just like log4j.
jcl-over-slf4j: Implementation of commons-logging to forward logging statements...
Free clean install Mac OS X Mountain Lion 10.8
This post will help you with installation guideline of Mac OS X Mountain Lion on Mac machine only not on pc. Before following the steps please make sure that your system configuration matches with minimum hardware requirement of Mountain Lion version. I am assuming that you have a Windows machine which will prepare installation media of fresh Mac OS X Mountain Lion but if you are upgrading from previous version then Windows is not mandatory requirement.
Step 1
Get an installation image
You...
Logging in java Part-1
Logging is one of the most important part of an application development. A well logging enabled application not only keeps track of the application flow but it also helps in debugging. As application grows logging even becomes more important because it helps in finding a bug which seldom comes on production. There may be thousands of logging requests generated per second depending upon the application size in that case logging should not hamper application performance. Apart from performance there...
Install subversion 1.7.x in ubuntu and mint
Ubuntu official software repository doesn't have subversion 1.7.x which is required by subclipse 1.8.x.But you can download all relevant packages from debian repository and install it manually.Packages required for 64-bit machine are listed below, for 32-bit machine replace amd64 with i386.1. subversion_1.7.5-1_amd64.deb2. libsvn1_1.7.5-1_amd64.deb3. libsvn-java_1.7.5-1_amd64.deb4. libaprutil1_1.4.1-3_amd64.deb5. libserf1_1.1.0-2_amd64.debDownload Link: http://packages.debian.org/ko/sid/subversionYou...
Generate SSL Certificate and add it to JVM and Tomcat
# Steps to generate a certificate file in linux. # Keep a common password whenever asked during the process. Commonly used password is "changeit". # Minimum requirement - openssl and jdk must be installed.# In this example domain name used for demonstration is "localhost".# Run these commands in the same order as written.# Generate a key
openssl genrsa -des3 -out localhost.key 1024
# Generate a local certificate sigining request.# In this step some information related to company will be asked to enter, keep in mind that "common name" must be the domain name.
openssl req -new -key localhost.key -out localhost.csr
# Generate a certificate from csr file, it has validity of 365 days.
openssl x509 -req -days 365 -in localhost.csr -signkey localhost.key -out localhost.crt
#...
Remove grid lines completely from excel jasperreports
Jasperreports version - 4.5.0
Apache poi version - 3.7
Jasperreports uses apache poi for xls report generation but for xlsx report generation it uses its own ooxml implementation so you have to modify both of these libraries to remove excel grid lines completely.
For XLS - Line 744, File location - poi-3.7-src/src/java/org/apache/poi/hssf/usermodel/HSSFWorkbook.java
HSSFSheet sheet = new HSSFSheet(this);
+ sheet.setDisplayGridlines(false);
For XLSX - Line 97, File location - jasperreports-4.5.0/src/net/sf/jasperreports/engine/export/ooxml/XlsxSheetHelper.java
- write("<sheetPr><outlinePr summaryBelow=\"0\"/></sheetPr><dimension ref=\"A1\"/><sheetViews><sheetView workbookViewId=\"0\"");
+ write("<sheetPr><outlinePr summaryBelow=\"0\"/></sheetPr><dimension...
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