Spring Hello world Project

Click here to download eclipse supported ZIP file

This is MainProgram.java file having the source code to execute business logic.

package com.cv.spring.core; import org.apache.log4j.Logger; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; /**  * Hello world!  * @author Chandra Vardhan  *  *  */ public class MainProgram {     private static final Logger LOGGER = Logger.getLogger(MainProgram.class);      public static void main(String[] args) {          LOGGER.info(         "LOGGER : Entered into main(String[]) of MainProgram class... ");          LOGGER.info(         "LOGGER : Reading spring-config.xml file... ");     ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml");          LOGGER.info(         "LOGGER : getting the User bean... ");     User obj = (User) context.getBean("user");     LOGGER.info("LOGGER : Name of the user is : :  "+obj.getNameAndMessage());   } }

This is User.java file having the source code to execute business logic.

package com.cv.spring.core; import org.apache.log4j.Logger; /**  * /** Hello world!  *   * @author Chandra Vardhan  *  *  */ public class User {   private static final Logger LOGGER = Logger.getLogger(User.class);   private String name;   private String message;   public void setName(String name) {     this.name = name;   }   public String getName() {     return name;   }   public String getMessage() {     return message;   }   public void setMessage(String message) {     this.message = message;   }   public String getNameAndMessage() {     LOGGER.info("IN User.getNameAndMessage()");     LOGGER.info("Name is : : " + name + " and message is : : " + message);     LOGGER.info("OUT User.getNameAndMessage()");     return name + " welcome to " + message;   } }

This is pom.xml file having the entries of dependency jars and information to build the application .

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.cv.spring.core</groupId> <artifactId>SpringHelloworldProject</artifactId> <version>1.0</version> <packaging>jar</packaging> <properties> <log4j-version>1.2.16</log4j-version> <java.version>1.8</java.version> <spring.version>4.2.0.RELEASE</spring.version> </properties> <build> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.3</version> <configuration> <source>${java.version}</source> <target>${java.version}</target> </configuration> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>2.6</version> <configuration> <warSourceDirectory>WebContent</warSourceDirectory> <failOnMissingWebXml>false</failOnMissingWebXml> </configuration> </plugin> </plugins> </build> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> </dependencies> </project>

This is spring-config.xml file having the spring configuration properties.

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"> <bean id="user" class="com.cv.spring.core.User"> <property name="name" value="CHANDRA VARDHAN" /> <property name="message" value="Hello world to Spring!!!" /> </bean> </beans>

This is log4j.properties file having the entries for logging the information into the console/file.

#By default enabling Console appender # Root logger option log4j.rootLogger=INFO, stdout # Redirect log messages to console log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.Target=System.out log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%-5p [%c]:%L -->> %m%n # Redirect log messages to a log file #log4j.appender.file=org.apache.log4j.RollingFileAppender #log4j.appender.file.File=C:\servlet-application.log #log4j.appender.file.MaxFileSize=5MB #log4j.appender.file.MaxBackupIndex=10 #log4j.appender.file.layout=org.apache.log4j.PatternLayout #log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n