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Kòd la egzanp sa yo ap dekri pwosesis la nan lè l sèvi avèk tablo desizyon al touye rules.There yo de fason

yon) Sèvi ak APIs nan fèy gaye dirèkteman nan egzekite règleman yo.
b) Konvèti yo sou fèy la gaye briye nan yon dosye drl ak Lè sa a, egzekite règleman yo.

Mwen pral dekri pwosesis la dezyèm (b).









** Prensipal Java klas la se 'DroolExcelDemo.java'. Premye li pral konvèti fèy la briye nan yon (.drl) ranpli ak Lè sa a, egzekite règleman yo.


package DROOLS;

java.io.BufferedWriter enpòte;
enpòte java.io.FileInputStream;
java.io.FileNotFoundException enpòte;
java.io.FileWriter enpòte;
java.io.IOException enpòte;
enpòte java.io.InputStream;
java.util.Collection enpòte;

enpòte org.drools.KnowledgeBase;
enpòte org.drools.KnowledgeBaseFactory;
enpòte org.drools.builder.KnowledgeBuilder;
enpòte org.drools.builder.KnowledgeBuilderFactory;
enpòte org.drools.builder.ResourceType;
org.drools.decisiontable.InputType enpòte;
enpòte org.drools.decisiontable.SpreadsheetCompiler;
enpòte org.drools.definition.KnowledgePackage;
org.drools.event.rule.DebugAgendaEventListener enpòte;
org.drools.event.rule.DebugWorkingMemoryEventListener enpòte;
enpòte org.drools.io.ResourceFactory;
org.drools.runtime.StatefulKnowledgeSession enpòte;

/**
* Klas sa a pral kreye yon dosye drl soti nan fèy briye
* ak Lè sa a, egzekite règleman yo.
*/
piblik klas DroolExcelDemo {
piblik estatik anile final prensipal(final chèn[] arg) {
// Kreye mason konesans
final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();

// Kreye drl dosye soti nan fèy briye
InputStream se = nil;
eseye {
se = nouvo FileInputStream(“D:/Vorkspas / DroolsDemo / src / DROOLS / DroolExcel.xls”);

} trape (FileNotFoundException e) {
e.printStackTrace();
}
// Kreye egzanp klas du
SpreadsheetCompiler SC = nouvo SpreadsheetCompiler();

// Sanble tout briye nan jenere nan (.drl) dosye
StringBuffer drl = nouvo StringBuffer(sc.compile(se, InputType.XLS));

// Antre valè dyalèk nan dosye drl
drl.insert(drl.indexOf(“DROOLS”)+40,”dyalèk ”mvel ””+”\n”);

// Tcheke pwodwi drl dosye a
System.out.println(“Jenere DRL dosye ki montre pi ba a–: “);
System.out.println(drl);

// ekri fisèl nan yon dosye drl
eseye {
BufferedWriter soti = BufferedWriter nouvo(nouvo FileWriter(“D:/Vorkspas / DroolsDemo / src / DROOLS / RuleFile.drl”));
out.write(drl.toString());
out.close();
}
trape (IOException e){
System.out.println(“Eksepsyon “);
}
// Rete tann anvan ou sèvi ak dosye a drl nan pwochen seksyon ki.
eseye {
Thread.sleep(10000);
} trape (InterruptedException e) {
e.printStackTrace();
}
// Kreyasyon Fen dosye drl soti nan fèy briye

// Lè l sèvi avèk DRL dosye
kbuilder.add(ResourceFactory.newClassPathResource(“RuleFile.drl”, DroolMessage.class ), ResourceType.DRL );

// Tcheke mason la pou erè
si ( kbuilder.hasErrors() ) {
System.out.println(“kbuilder gen erè”);
System.out.println( kbuilder.getErrors().toString());
}
// jwenn pakè yo konpile (ki se seryalizabl)
pkgs Koleksyon final = kbuilder.getKnowledgePackages();

// ajoute pakè yo nan yon konnesans (deplwaye pakè yo konesans).
final konnesans kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(pkgs);

// Kreye sesyon stateful
final ksession StatefulKnowledgeSession = kbase.newStatefulKnowledgeSession();

// Fikse koute evènman
ksession.addEventListener(nouvo DebugAgendaEventListener());
ksession.addEventListener(nouvo DebugWorkingMemoryEventListener());

// Kreye mesaj tèks
DroolMessage messagetxt = nouvo DroolMessage();
messagetxt.setMessage(“Nimewo vòl”);

DroolMessage messagetxt1 = nouvo DroolMessage();
messagetxt1.setMessage(“FlightCode”);

// Antre nan sesyon ak dife règ
System.out.println(“insert nan sesyon”);
ksession.insert(messagetxt);
ksession.insert(messagetxt1);
System.out.println(“avan yo te tire règ”);
ksession.fireAllRules();
System.out.println(“apre tire règ”);
ksession.dispose();
System.out.println(“apre jete”);
}
}








* *Dosye a dezyèm se yon DroolMessage.java '’ pojo klas. Lwa sa a bay valè yo mete sou klas la prensipal Java sa dekri anwo a.

package DROOLS;
/**
* This is a POJO for messages.It will be used by the drl file.
* The message values will be set from the DroolExcelDemo class
*/
public class DroolMessage {
// Create variable
private String message;

// Konstrukteur
piblik DroolMessage() {
System.out.println(“inisyalizin Message”);
}
// Meteur ak pikeur metòd
piblik chèn getMessage() {
retounen mesaj;
}
piblik anile setMessage(Mesaj fisèl) {
this.message = mesaj;
}
// metòd tès li teste ekzekisyon an règ
piblik anile tès(Tès fisèl) {
System.out.println(“Kòmanse analyse ak pozisyon fen: “+tès);
}
}

** Sa yo se yon dosye règ pwodwi pa DroolExcelDemo.java la '’ klas.

package DROOLS;
//generated from Decision Table
dialect "mvel"
import DroolMessage;
// rule values at B12, header at B7
rule "DroolExcelRule_12"
when
msg:DroolMessage(message == "FlightNumber")
then
msg.test("1,6");
end

// règ valè nan B13, header nan B7
kòmande sou “DroolExcelRule_13”
lè
Msg:DroolMessage(mesaj == “FlightCode”)
Lè sa a,
msg.test(“7,8”);
fen

** Sa yo se opinyon an briye ki baze sou dosye règ DroolExcelDemo.java la '’ klas pi wo a.

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