spring+4+constructor+and+setter+injection
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This is Demo.java file having the source code to execute business logic.
package com.cv.spring;
/**
* @author Chandra Vardhan
*/
//Demo.java(POJI)
interface Demo {
String wishMsg(String uname);
} |
This is DemoBean.java file having the source code to execute business logic.
package com.cv.spring;
import java.util.Calendar;
import org.apache.log4j.Logger;
/**
* @author Chandra Vardhan
*/
public class DemoBean implements Demo {
static final Logger LOGGER = Logger.getLogger(DemoBean.class);
private String msg;
public DemoBean() {
System.out.println("DemoBean:0-arg constructor");
System.out
.println("DemoBean obj is created b4 setter injection is done..");
}
public DemoBean(String msg) {
System.out.println("DemoBean:1-arg constructor");
System.out
.println("DemoBean obj is created constructor injection is done..");
this.msg = msg;
System.out
.println("DemoBean obj is created constructor injection is done..and its value is===="
+ msg);
}
public void setMsg(String msg) {
this.msg = msg;
System.out.println("DemoBean:setMsg(-)");
System.out.println("DemoBean:setMsg(-)====val of msg is=====" + msg);
}
/*
* public String getMsg() { System.out.println("DemoBean:getMsg()"); return
* msg; //System.out.println("DemoBean:getMsg()"); we wont write any stmt
* after return stmt
*
* }
*/
public String wishMsg(String uname) {
Calendar cl = Calendar.getInstance();
System.out.println("Calendar class obj is==========" + cl.getClass());
int h = cl.get(Calendar.HOUR_OF_DAY);
if (h < 12)
return msg + "---->good mrng " + uname;
else if (h <= 16)
return msg + "---->good aftrnn " + uname;
else
return msg + "---->good n8 " + uname;
}
} |
This is DemoClient.java file having the source code to execute business logic.
package com.cv.spring;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.xml.XmlBeanFactory;//(c)
import org.springframework.core.io.FileSystemResource;//(c)
/**
* @author Chandra Vardhan
*/
public class DemoClient {
static final Logger LOGGER = Logger.getLogger(DemoClient.class);
public static void main(String[] args) {
FileSystemResource fsr = new FileSystemResource(
"src/main/resources/DemoCfg.xml");
LOGGER.info("FileSystemResource class obj is loaded cfg file : : "
+ fsr.getClass());// in first line we r getting this o/p
XmlBeanFactory factory = new XmlBeanFactory(fsr);
LOGGER.info("XmlBeanFactory class obj is loaded fsr obj======"
+ factory.getClass());
Object o1 = factory.getBean("db");
DemoBean beanobjref = (DemoBean) o1;// Demo beanobjref=(Demo)o1; both
// one at the same
LOGGER.info(beanobjref.wishMsg("chote"));
}
} |
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">.0" encoding="UTF-8"?>
<modelVersion>4.0.0</modelVersion>
<groupId>com.cv.spring.annotation</groupId>
<artifactId>Spring4ConstructorAndSetterInjection</artifactId>
<name>Spring4ConstructorAndSetterInjection</name>
<packaging>jar</packaging>
<version>1.0</version>
<properties>
<java-version>1.8</java-version>
<log4j-version>1.2.16</log4j-version>
<org.springframework-version>4.1.6.RELEASE</org.springframework-version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project> |
This is DemoCfg.xml spring configuration file and these entries are used in the application.
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN"
"http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<bean id="db" class="com.cv.spring.DemoBean">
<property name="msg"><value>hello</value></property>
<constructor-arg>
<value>namashte</value>
</constructor-arg>
</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
|
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