java Drools：触发了多个规则，我希望打印出结论（然后是部分），这可能吗？如果不是，你有什么建议？

Question

我正在尝试使用drools制作一个智能教学系统，该系统的目的是根据每个学生的评估测试为他们提供个性化的练习。 完成测试后，系统获得评估分数，并根据该分数打印出合适练习的列表

---

这些规则分为两个目的，一个用于选择学生级别。另一个是根据学生的水平确定学习计划中包括哪些练习

问题是，每一个级别都包含不同的练习，这将导致不止一条规则被触发。我想让程序打印一份与学生水平相匹配的练习列表

package com.binod.DroolsDemo;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;

import org.drools.compiler.compiler.DroolsParserException;
import org.drools.compiler.compiler.PackageBuilder;
import org.drools.core.RuleBase;
import org.drools.core.RuleBaseFactory;
import org.drools.core.WorkingMemory;

public class DemoTest {

    public static void main(String[] args) throws DroolsParserException, IOException {
        DemoTest client = new DemoTest();
        client.execteRule();
    }

    public void execteRule() throws DroolsParserException, IOException{
           PackageBuilder builder = new PackageBuilder();
           String ruleFile = "/offers.drl";
           InputStream resourceAsStream = getClass().getResourceAsStream(ruleFile);

           Reader ruleReader = new InputStreamReader(resourceAsStream);
           builder.addPackageFromDrl(ruleReader);
           org.drools.core.rule.Package rulePackage = builder.getPackage();
           RuleBase ruleBase = RuleBaseFactory.newRuleBase();
           ruleBase.addPackage(rulePackage);

           WorkingMemory workingMemory = ruleBase.newStatefulSession();

           AssessmentLevel assessemntLevel = new AssessmentLevel();
           assessemntLevel.setAssessment("Null");
           workingMemory.insert(assessemntLevel);
           workingMemory.fireAllRules();

           System.out.println("The level for this student assessment "+assessemntLevel.getAssessment()+" is "+assessemntLevel.getLevel()+" And the excercises include "+assessemntLevel.getPersonalizedexercises());

       } 
}

package com.binod.DroolsDemo;

public class AssessmentLevel {

    private String assessment;
    private String level;
    private String personalizedexercises;

    public String getAssessment() {
        return assessment;
    }
    public void setAssessment(String assessment) {
        this.assessment = assessment;
    }
    public String getLevel() {
        return level;
    }
    public void setLevel(String level) {
        this.level = level;
    }
    public String getPersonalizedexercises() {
        return personalizedexercises;
    }
    public void setPersonalizedexercises(String personalizedexercises) {
        this.personalizedexercises = personalizedexercises;
    }

}

我的更新规则文件

import com.binod.DroolsDemo.AssessmentLevel

rule "Offer for A1"
    when 
        offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.setLevel("A1");
    end
rule "Offer for A2"
    when 
        offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.setLevel("A2");
    end
rule "Offer for B1"
    when 
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.setLevel("B1");
    end
rule "Offer for B2"
    when 
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.setLevel("B2");
    end
rule "Offer for C1 "
    when 
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.setLevel("C1");
    end
rule "Offer for C2"
    when 
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.setLevel("C2");
    end
rule "Offer for recommend"
    when 
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30] AND [31-35]")
    then
        offerObject.setLevel("Advanced");
    end
rule "Personalized Exercises  Intro to Computers and Programming"
    when 
         offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.setPersonalizedexercises("Intro Computers and Programming");
    end
rule "Personalized Exercises Logic"
    when 
         offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.setPersonalizedexercises("Logic");
    end
rule "Personalized Exercises Flowcharts and Algorithms"
    when 
         offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.setPersonalizedexercises("Flowcharts and Algorithms");
    end
rule "Personalized Exercises Pseudo Code"
    when 
         offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.setPersonalizedexercises("Pseudo Code");
    end
rule "Personalized Exercises Syntax"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.setPersonalizedexercises("Syntax");
    end
rule "Personalized Exercises Data Structure"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.setPersonalizedexercises("Data Structure");
    end
rule "Personalized Exercises Variables "
    when 
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.setPersonalizedexercises("Variables");
    end
rule "Personalized Exercises Data Types"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.setPersonalizedexercises("Data Types");
    end
rule "Personalized Exercises Numbers"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.setPersonalizedexercises("Numbers");
    end
rule "Personalized Exercises Casting"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.setPersonalizedexercises("Casting");
    end
rule "Personalized Exercises Strings"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.setPersonalizedexercises("Strings");
    end
rule "Personalized Exercises Boolean"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.setPersonalizedexercises("Boolean");
    end
rule "Personalized Exercises Operators"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.setPersonalizedexercises("Operators");
    end
rule "Personalized Exercises Lists"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.setPersonalizedexercises("Lists");
    end
rule "Personalized Exercises  If Else"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.setPersonalizedexercises("If Else");
    end
rule "Personalized Exercises While Loops"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.setPersonalizedexercises("While Loops");
    end
rule "Personalized Exercises Functions"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.setPersonalizedexercises("Functions");
    end
rule "Personalized Exercises Arrays"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.setPersonalizedexercises("Arrays");
    end
rule "Personalized Exercises Classes/Objects"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.setPersonalizedexercises("Classes/Objects");
    end
rule "Personalized Exercises Dates"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.setPersonalizedexercises("Dates");
    end
rule "Personalized Exercises Modules"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.setPersonalizedexercises("Modules");
    end 
rule "Personalized Exercises Try Accept"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.setPersonalizedexercises("Try Accept");
    end
rule "Personalized Exercises  User Input"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.setPersonalizedexercises(" User Input");
    end 
rule "Personalized Exercises String Formating "
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.setPersonalizedexercises("String Formating ");
    end 
rule "Personalized Exercises Database Basics "
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.setPersonalizedexercises("Database Basics ");
    end 
rule "Personalized Exercises SQL Basics"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.setPersonalizedexercises("SQL Basics");
    end 
rule "Personalized Exercises Intro to Object Oriented Programming"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.setPersonalizedexercises("Intro to Object Oriented Programming");
    end 
rule "Personalized Exercises Information Systems"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.setPersonalizedexercises("Intro to Information Systems");
    end 
rule "Personalized Exercises Recommend new courses"
    when 
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30] AND [31-35]")
    then
        offerObject.setPersonalizedexercises("Brief about advanced courses");
    end 

Answer 1

根据你的问题，你希望根据特定标准为学生分配多个练习。尝试执行以下代码：

更新的评估级别：

import java.util.ArrayList;
import java.util.List;

public class AssessmentLevel {

    private String assessment;
    private String level;
    private List<String> personalizedexercises = new ArrayList<>();

    public String getAssessment() {
        return assessment;
    }

    public void setAssessment(String assessment) {
        this.assessment = assessment;
    }

    public String getLevel() {
        return level;
    }

    public void setLevel(String level) {
        this.level = level;
    }

    public List<String> getPersonalizedexercises() {
        return personalizedexercises;
    }

    public void setPersonalizedexercises(List<String> personalizedexercises) {
        this.personalizedexercises = personalizedexercises;
    }

}

更新的规则文件：

rule "Offer for A1"
    when
        offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.setLevel("A1");
    end
rule "Offer for A2"
    when
        offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.setLevel("A2");
    end
rule "Offer for B1"
    when
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.setLevel("B1");
    end
rule "Offer for B2"
    when
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.setLevel("B2");
    end
rule "Offer for C1 "
    when
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.setLevel("C1");
    end
rule "Offer for C2"
    when
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.setLevel("C2");
    end
rule "Offer for recommend"
    when
        offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30] AND [31-35]")
    then
        offerObject.setLevel("Advanced");
    end
rule "Personalized Exercises  Intro to Computers and Programming"
    when
         offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.getPersonalizedexercises().add("Intro Computers and Programming");
    end
rule "Personalized Exercises Logic"
    when
         offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.getPersonalizedexercises().add("Logic");
    end
rule "Personalized Exercises Flowcharts and Algorithms"
    when
         offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.getPersonalizedexercises().add("Flowcharts and Algorithms");
    end
rule "Personalized Exercises Pseudo Code"
    when
         offerObject: AssessmentLevel(assessment=="Null")
    then
        offerObject.getPersonalizedexercises().add("Pseudo Code");
    end
rule "Personalized Exercises Syntax"
    when
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.getPersonalizedexercises().add("Syntax");
    end
rule "Personalized Exercises Data Structure"
    when
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.getPersonalizedexercises().add("Data Structure");
    end
rule "Personalized Exercises Variables "
    when
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.getPersonalizedexercises().add("Variables");
    end
rule "Personalized Exercises Data Types"
    when
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.getPersonalizedexercises().add("Data Types");
    end
rule "Personalized Exercises Numbers"
    when
         offerObject: AssessmentLevel(assessment=="[1-10]")
    then
        offerObject.getPersonalizedexercises().add("Numbers");
    end
rule "Personalized Exercises Casting"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.getPersonalizedexercises().add("Casting");
    end
rule "Personalized Exercises Strings"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.getPersonalizedexercises().add("Strings");
    end
rule "Personalized Exercises Boolean"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.getPersonalizedexercises().add("Boolean");
    end
rule "Personalized Exercises Operators"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.getPersonalizedexercises().add("Operators");
    end
rule "Personalized Exercises Lists"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15]")
    then
        offerObject.getPersonalizedexercises().add("Lists");
    end
rule "Personalized Exercises  If Else"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.getPersonalizedexercises().add("If Else");
    end
rule "Personalized Exercises While Loops"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.getPersonalizedexercises().add("While Loops");
    end
rule "Personalized Exercises Functions"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.getPersonalizedexercises().add("Functions");
    end
rule "Personalized Exercises Arrays"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20]")
    then
        offerObject.getPersonalizedexercises().add("Arrays");
    end
rule "Personalized Exercises Classes/Objects"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.getPersonalizedexercises().add("Classes/Objects");
    end
rule "Personalized Exercises Dates"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.getPersonalizedexercises().add("Dates");
    end
rule "Personalized Exercises Modules"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.getPersonalizedexercises().add("Modules");
    end
rule "Personalized Exercises Try Accept"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25]")
    then
        offerObject.getPersonalizedexercises().add("Try Accept");
    end
rule "Personalized Exercises  User Input"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.getPersonalizedexercises().add(" User Input");
    end
rule "Personalized Exercises String Formating "
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.getPersonalizedexercises().add("String Formating ");
    end
rule "Personalized Exercises Database Basics "
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.getPersonalizedexercises().add("Database Basics ");
    end
rule "Personalized Exercises SQL Basics"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.getPersonalizedexercises().add("SQL Basics");
    end
rule "Personalized Exercises Intro to Object Oriented Programming"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.getPersonalizedexercises().add("Intro to Object Oriented Programming");
    end
rule "Personalized Exercises Information Systems"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30]")
    then
        offerObject.getPersonalizedexercises().add("Intro to Information Systems");
    end
rule "Personalized Exercises Recommend new courses"
    when
         offerObject: AssessmentLevel(assessment=="[1-10] AND [11-15] AND [16-20] AND [21-25] AND [26-30] AND [31-35]")
    then
        offerObject.getPersonalizedexercises().add("Brief about advanced courses");
    end