Java开发一个推理机,该推理机能利用实验1的规则库和综合数据库进行推理。

以下是一个基于Java的推理机的示例代码，它能够利用实验1的规则库和综合数据库进行推理。

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

public class InferenceEngine {
    private List<Rule> rules; // 规则库
    private List<Fact> facts; // 综合数据库

    public InferenceEngine() {
        rules = new ArrayList<>();
        facts = new ArrayList<>();
    }

    public void addRule(Rule rule) {
        rules.add(rule);
    }

    public void addFact(Fact fact) {
        facts.add(fact);
    }

    public void executeInference() {
        boolean noNewFacts = false;
        while (!noNewFacts) {
            noNewFacts = true;
            for (Rule rule : rules) {
                if (rule.evaluate(facts) && !facts.contains(rule.getConclusion())) {
                    facts.add(rule.getConclusion());
                    noNewFacts = false;
                }
            }
        }
    }

    public List<Fact> getFacts() {
        return facts;
    }
}

class Rule {
    private String name; // 规则名称
    private List<Fact> premises; // 前提列表
    private Fact conclusion; // 结论

    public Rule(String name, List<Fact> premises, Fact conclusion) {
        this.name = name;
        this.premises = premises;
        this.conclusion = conclusion;
    }

    public boolean evaluate(List<Fact> facts) {
        for (Fact premise : premises) {
            if (!facts.contains(premise)) {
                return false;
            }
        }
        return true;
    }

    public Fact getConclusion() {
        return conclusion;
    }
}

class Fact {
    private String name; // 事实名称
    private String value; // 事实值

    public Fact(String name, String value) {
        this.name = name;
        this.value = value;
    }

    public String getName() {
        return name;
    }

    public String getValue() {
        return value;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof Fact) {
            Fact other = (Fact) obj;
            return name.equals(other.name) && value.equals(other.value);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return name.hashCode() + value.hashCode();
    }
}

class Main {
    public static void main(String[] args) {
        // 创建推理机
        InferenceEngine engine = new InferenceEngine();

        // 添加规则
        List<Fact> premises1 = new ArrayList<>();
        premises1.add(new Fact("hasSymptom", "fever"));
        premises1.add(new Fact("hasSymptom", "cough"));
        Rule rule1 = new Rule("rule1", premises1, new Fact("hasDisease", "cold"));
        engine.addRule(rule1);

        List<Fact> premises2 = new ArrayList<>();
        premises2.add(new Fact("hasSymptom", "fever"));
        premises2.add(new Fact("hasSymptom", "rash"));
        Rule rule2 = new Rule("rule2", premises2, new Fact("hasDisease", "measles"));
        engine.addRule(rule2);

        List<Fact> premises3 = new ArrayList<>();
        premises3.add(new Fact("hasSymptom", "cough"));
        Rule rule3 = new Rule("rule3", premises3, new Fact("hasDisease", "bronchitis"));
        engine.addRule(rule3);

        // 添加事实
        engine.addFact(new Fact("hasSymptom", "fever"));
        engine.addFact(new Fact("hasSymptom", "cough"));

        // 执行推理
        engine.executeInference();

        // 输出结果
        List<Fact> facts = engine.getFacts();
        for (Fact fact : facts) {
            System.out.println(fact.getName() + " = " + fact.getValue());
        }
    }
}

在这个示例中，推理机创建了三个规则，并添加了两个事实。执行推理后，推理机将得出结论"hasDisease = cold"，并将其添加到综合数据库中。最后，程序输出了所有的事实。