我想只在drools中得到一个结果。
我尝试使用“from”和“来自累积”，但它没有用。
Main.java //主类
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
kbuilder.add(ResourceFactory.newClassPathResource("Rules_Schedule.drl", getClass()), ResourceType.DRL);
if (kbuilder.hasErrors()) {
System.err.println(kbuilder.getErrors().toString());
}
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
try {
String[] Sss = new String[2];
Sss[0] = "RLC";
Sss[1] = "DCK";
int i=0;
rs_sch_exam = stm_sch_exam.executeQuery("SELECT *,DATE_FORMAT(sc_date,'%a') AS day FROM schedule_exam");
while(rs_sch_exam.next()){
String date = rs_sch_exam.getString("sc_date"),
day = rs_sch_exam.getString("day"),
start = rs_sch_exam.getString("sc_star"),
end = rs_sch_exam.getString("sc_end"),
subj = rs_sch_exam.getString("sc_subj"),
depa = rs_sch_exam.getString("sc_depa"),
sec = rs_sch_exam.getString("sc_sec"),
room = rs_sch_exam.getString("sc_room");
Schedule schedule = new Schedule(date,day,subj,sec,depa,room,start,end);
schedule.setControlExam1(Sss[i++]); //Test add data,Get value from SQL 2 Recode not had Control Exam1
ksession.insert(schedule);
}
rs_peo = stm_peo.executeQuery("SELECT * FROM control_exam");
while(rs_peo.next()){
String code = rs_peo.getString("ce_code"),
name = rs_peo.getString("ce_name"),
depart = rs_peo.getString("ce_department"),
room = rs_peo.getString("ce_room"),
sun = rs_peo.getString("ce_sunday"),
mon = rs_peo.getString("ce_monday"),
tue = rs_peo.getString("ce_tuesday"),
wed = rs_peo.getString("ce_wednesday"),
thu = rs_peo.getString("ce_thursday"),
fri = rs_peo.getString("ce_friday"),
sat = rs_peo.getString("ce_saturday");
Control_Exam controlExam = new Control_Exam(code,name,depart,room,
Integer.parseInt(sun),Integer.parseInt(mon),Integer.parseInt(tue),
Integer.parseInt(wed),Integer.parseInt(thu),Integer.parseInt(fri),
Integer.parseInt(sat));
ksession.insert(controlExam);
}
} catch (SQLException ex) {}
ksession.fireAllRules();
Schedule.java //在我的包裹中; control1，control2，control3存储来自 Control_Exam
的代码public class Schedule {
private String date, day, subject, sec, depart, room, realstarttime, realendtime,
control1 = null, control2 = null, control3 = null;
private int starttime,endtime;
private String[] timeA;
public Schedule(String date,String day,String subject,String sec,
String depart,String room,String t_start,String t_end){
this.date = date;
this.day = day;
this.subject = subject;
this.sec = sec;
this.depart = depart;
this.room = room;
this.control1 = "";
this.control2 = "";
this.control3 = "";
this.timeA = t_start.split(":");
try{
realstarttime = this.timeA[0].trim() + this.timeA[1].trim();
this.starttime = Integer.parseInt(realstarttime);
realstarttime = this.timeA[0].trim() + ":" + this.timeA[1].trim();
} catch(ArrayIndexOutOfBoundsException e){ }
this.timeA = t_end.split(":");
try{
realendtime = this.timeA[0].trim() + this.timeA[1].trim();
this.endtime = Integer.parseInt(realendtime);
realendtime = this.timeA[0].trim() + ":" + this.timeA[1].trim();
} catch(ArrayIndexOutOfBoundsException e){ }
}
public String getDate() {
return date;
}
public String getDay() {
return day;
}
public String getSubject() {
return subject;
}
public String getSec() {
return sec;
}
public String getDepart() {
return depart;
}
public String getRoom() {
return room;
}
public int getStarttime() {
return starttime;
}
public int getEndtime() {
return endtime;
}
public String getRealStartTime() {
return realstarttime;
}
public String getRealEndTime() {
return realendtime;
}
public boolean getStateCE1() {
return control1.equals("");
}
public boolean getStateCE2() {
return control2.equals("");
}
public boolean getStateCE3() {
return control3.equals("");
}
public String getControl1() {
return control1;
}
public String getControl2() {
return control2;
}
public String getControl3() {
return control3;
}
public void setControlExam1(String ce_code) {
this.control1 = ce_code;
}
public void setControlExam2(String ce_code) {
this.control2 = ce_code;
}
public void setControlExam3(String ce_code) {
this.control3 = ce_code;
}
}
Control_Exam.java //在我的包中
public class Control_Exam {
private String code,name,department,room,build;
private int sunday,monday,tuesday,wednesday,thursday,friday,saturday;
public Control_Exam(){
}
public Control_Exam(String code,String name,String depart,String room,
int sun,int mon,int tue,int wed,int thu,int fri,
int sat){
this.code = code;
this.name = name;
this.department = depart;
this.room = room;
this.build = room.substring(0,room.indexOf("-")).trim();
this.sunday = sun;
this.monday = mon;
this.tuesday = tue;
this.wednesday = wed;
this.thursday = thu;
this.friday = fri;
this.saturday = sat;
}
public void addData(Control_Exam Lock){
this.code = Lock.getCode();
this.name = Lock.getName();
this.department = Lock.getDepart();
this.room = Lock.getRoom();
this.build = Lock.getBuild();
this.sunday = Lock.getValueofDay("Sun");
this.monday = Lock.getValueofDay("Mon");
this.tuesday = Lock.getValueofDay("Tue");
this.wednesday = Lock.getValueofDay("Wed");
this.thursday = Lock.getValueofDay("Thu");
this.friday = Lock.getValueofDay("Fri");
this.saturday = Lock.getValueofDay("Sat");
}
public String getCode() {
return code;
}
public String getName() {
return name;
}
public String getDepart() {
return department;
}
public String getRoom() {
return room;
}
public String getBuild() {
return build;
}
public int getValueofDay(String day){
if(day.equals("Sun"))
return sunday;
else if(day.equals("Mon"))
return monday;
else if(day.equals("Tue"))
return tuesday;
else if(day.equals("Wed"))
return wednesday;
else if(day.equals("Thu"))
return thursday;
else if(day.equals("Fri"))
return friday;
else if(day.equals("Sat"))
return saturday;
else
return 0;
}
}
Rules_Schedule.drl
import schedule.Schedule
import schedule.Control_Exam
rule "Schedule test 01"
salience 2
when
Schedule( $scheduleCheck1 : control1 , $scheduleCheck2 : control2 , $scheduleCheck3 : control3 )
$controlExamCheck1 : Control_Exam( ) from accumulate( $controlExamCheck2 : Control_Exam( $scheduleCheck1 == code || $scheduleCheck2 == code || $scheduleCheck3 == code ),
init( Control_Exam CEL = new Control_Exam(); ),
action( CEL.addData($controlExamCheck2); ),
result( CEL ) )
$controlExamCheck3 : Control_Exam( ) from Control_Exam( code != $controlExamCheck1.getCode() )
then
System.out.println(" Test EC3 : " + $controlExamCheck3.getCode() );
end
看看这有两个结果。
第一个结果没有“RLC”。
第二个结果没有“DCK”。
但我想 Control_Exam 放在一起（Sum / Union /类似的东西......）。
联盟首先来自 Control_Exam 的时间表，并找到不在 Control_Exam agian中的结果。
**结果：**
Test EC3 : PTN
Test EC3 : PTN
Test EC3 : RCT
Test EC3 : RCT
Test EC3 : TRK
Test EC3 : TRK
Test EC3 : PST
Test EC3 : PST
Test EC3 : NSV
Test EC3 : NSV
Test EC3 : NBD
Test EC3 : NBD
Test EC3 : NPY
Test EC3 : NPY
Test EC3 : SPJ
Test EC3 : SPJ
Test EC3 : PTA
Test EC3 : PTA
Test EC3 : OPT
Test EC3 : OPT
Test EC3 : SDN
Test EC3 : SDN
Test EC3 : SRH
Test EC3 : SRH
Test EC3 : SHG
Test EC3 : SHG
Test EC3 : RLC
Test EC3 : KBP
Test EC3 : KBP
Test EC3 : SYS
Test EC3 : SYS
Test EC3 : CCK
Test EC3 : CCK
Test EC3 : SCV
Test EC3 : SCV
Test EC3 : CPR
Test EC3 : CPR
Test EC3 : DCK
Test EC3 : PDD
Test EC3 : PDD
Test EC3 : SAK
Test EC3 : SAK
答案 0 :(得分：0)
我不确定这与你的问题究竟是如何相关的，但我已经能够使用external function support为我的drools规则添加联合函数，例如union。
首先在java类中创建一个set union函数作为静态方法，并将其导入到drools文件中：
在SetFunctions.java中：
@SuppressWarnings({ "rawtypes", "unchecked" })
public static Set setUnion(Set setA, Set setB) {
Set tmp = new HashSet(setA);
tmp.addAll(setB);
return tmp;
}
在.drl文件中：
import function org.test.rules.functions.SetFunctions.setUnion
rule 'Test'
$factSet1 : java.util.Set() from collect(Fact(cond = test1))
$factSet2 : java.util.Set() from collect(Fact(cond = test2))
$combinedSet : java.util.Set() from collect(Fact() from setUnion($factSet1, $factSet2))
...
then
....
end