Slf4j is indeed just a logging facade so that one can you can plug in his/her own logging frameworks like java.util.logging, log4j, Apache commons logging, and logback. Native implementation of slf4j is logback. Step 1: Create a new Maven based Java project.
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mvn archetype:generate -DgroupId=com.mytutorial -DartifactId=simpleLog4j -DinteractiveMode=false |
Step 2: Import this project into eclipse...
BeanIO is an open source Java framework for marshaling and marshaling Java beans from a flat file, stream, or simple String object. It is very powerful with support for XML, CSV, delimited and fixed length stream formats, Object binding, filed validation, integration with spring-batch, etc. But there are scenarios where you need to simply read or write CSV data,
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Step 1: Create the following folders
1. c:\projects\learn-java is the “project folder“.
2. com\mycompany1\main & com\mycompany1\service are the “packages” under the project.
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This means handle a middle of an XML document (i.e. a node in middle of an XML), and use JAXB to marshal & unmarshal. The two key words are “JAXBElement” and “javax.xml.stream.XMLStreamReader” to accomplish this as shown below. Marshal a Car object to XML fragment Assume that “Car” … Read...
The javap is a class file dissembler. Here are 3 scenarios you can put javap to use with code examples.
#1 Finding the Java version of the class file within a jar
Extract a class file say “MyJobRunner.class” from a jar file and use javap to find out the version used
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bash-3.2$ javap -v MyJobRunner Compiled from "MyJobRunner.java" public interface com.myapp.invoke.MyJobRunner SourceFile: "MyJobRunner.java" RuntimeVisibleAnnotations: length = 0x6 00 01 00 08 00 00 minor version: 0 major version: 51 Constant pool: const #1 = class #9; // com/myapp/invoke/MyJobRunner const #2 = class #10; // java/lang/Object const #3 = Asciz executeIlliquidDecsProcess; const #4 = Asciz ()V; const #5 = Asciz SourceFile; const #6 = Asciz MyJobRunner.java; const #7 = Asciz RuntimeVisibleAnnotations; const #8 = Asciz Lorg/springframework/stereotype/Service;; const #9 = Asciz com/myapp/invoke/MyJobRunner; const #10 = Asciz java/lang/Object; { public abstract void executeIlliquidDecsProcess(); } |
“major version: 51”
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This extends Basic JAXB tutorial with Maven & XSD – 1 to marshall with Spring OXM and Spring XML.
Right mouse click on target/generated-sources and select “Build Path –> Use as Source Folder”
Step 1: add spring-orm to use JAXB and spring-xml to use StringResult.
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This extends Basic JAXB tutorial with Maven & XSD – 1 to unmarshal with Spring OXM and Spring XML.
The Spring & JAXB marshaling tutorial used XML based config to inject the “jaxb2Marshaller”, but in this to make things a bit more interesting, let’s use “Java”
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This assumes that you have gone through the basic “SQL tutorial with HSQLDB”. This tutorial extends the SQL tutorial by using JDBC (Java Data Base Connectivity) to programmatically connect to the database, write data to the database, and read data from the database. This is also known as the CRUD operations,...
This tutorial performance test the RESTFul web service we created ealier as part of the “RESTful Web Service Tutorial with Apache CXF, Maven, and Eclipse” with JMeter. JMeter is an opensource performance testing tool.
Step 1: Download latest release version of Apache JMeter from “http://jmeter.apache.org/download_jmeter.cgi“,
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This post extends 8 JMeter Performance testing Interview Q&As to cover JSON HTTP post. Now a days, a single page interactive web sites are very popular, and they post JSON based data back to the server to create a new record or to update an existing record. Step 1: Firstly,...
This tutorial is an extension to the previous “simple web tutorial”. In this tutorial, JSF is used to create a simple greeting web application to run on the Tomcat server. It also demonstrates how Maven brings in the relevant dependent JAR files. Step 1: Firstly, … Read more ›...
Scenario 1: The Operation interface with the annotation @FunctionalInterface. This annotation ensures that you can only have a single abstract method. You can have additional default and static method implementations. Step 1: Define the interface. … Read more ›...
Auditing can be done in Servlet filters to log requests and responses, you can add interceptors in many frameworks, and AOP (Aspect Oriented Programming) allows you to add cross cutting concerns as described in this tutorial with Spring and AOP. Step 1: Create a new Maven based Java project. …...
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