java code for Message Digest

/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/



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//File: factory.xml




SHA1















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import java.security.MessageDigest;

import sun.misc.BASE64Encoder;

public class MessageDigester {

private MessageDigest digest1 = null;
private MessageDigest digest2 = null;

public void setDigest1(MessageDigest digest1) {
this.digest1 = digest1;
}

public void setDigest2(MessageDigest digest2) {
this.digest2 = digest2;
}

public void digest(String msg) {
System.out.println("Using digest1");
digest(msg, digest1);

System.out.println("Using digest2");
digest(msg, digest2);
}

private void digest(String msg, MessageDigest digest) {
System.out.println("Using alogrithm: " + digest.getAlgorithm());
digest.reset();
byte[] bytes = msg.getBytes();
byte[] out = digest.digest(bytes);
BASE64Encoder enc = new BASE64Encoder();
System.out.println(enc.encode(out));
}
}



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import java.security.MessageDigest;

import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;

public class MessageDigestFactoryBean implements FactoryBean, InitializingBean {

private String algorithmName = "MD5";

private MessageDigest messageDigest = null;

public Object getObject() throws Exception {
return messageDigest;
}


public Class getObjectType() {
return MessageDigest.class;
}


public boolean isSingleton() {
return true;
}

public void afterPropertiesSet() throws Exception {
messageDigest = MessageDigest.getInstance(algorithmName);
}

public void setAlgorithmName(String algorithmName) {
this.algorithmName = algorithmName;
}

}


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import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;

public class MessageDigestExample {

public static void main(String[] args) {
BeanFactory factory = new XmlBeanFactory(new FileSystemResource(
"build/factory.xml"));

MessageDigester digester = (MessageDigester) factory
.getBean("digester");
digester.digest("Hello World!");

}
}