Mega Code Archive
Message Digest Example
<![CDATA[
/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/
///////////////////////////////////////////////////////////////////////////////////////
//File: factory.xml
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="shaDigest" class="MessageDigestFactoryBean">
<property name="algorithmName">
<value>SHA1</value>
</property>
</bean>
<bean id="defaultDigest" class="MessageDigestFactoryBean"/>
<bean id="digester" class="MessageDigester">
<property name="digest1">
<ref local="shaDigest"/>
</property>
<property name="digest2">
<ref local="defaultDigest"/>
</property>
</bean>
</beans>
///////////////////////////////////////////////////////////////////////////////////////
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));
}
}
///////////////////////////////////////////////////////////////////////////////////////
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;
}
}
///////////////////////////////////////////////////////////////////////////////////////
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!");
}
}
MessageDigestExample.zip( 1,199 k)
]]>