Java基于drools做规则校验的实现

        <dependency>
            <groupId>org.drools</groupId>
            <artifactId>drools-compiler</artifactId>
            <version>7.37.0.Final</version>
        </dependency>

public class DynamicRule {

    public static void main(String[] args) {
        //业务代码处理后得到的drl
        String drl =
                "import java.util.Map;\n" +
                "import java.util.HashMap;\n" +
                "import java.util.List;\n" +
                "import java.util.ArrayList;\n" +

                "global java.util.HashMap returnObj\n" +

                "rule \"test\"\n" +
                "when\n" +
                "    $m : Map()\n" +
                "    $o : Object($m[\"name\"].equals(\"abc\") && $m[\"age\"] >= 18)\n" +
                "then\n" +
                "    System.out.println($m);\n" +
                "    returnObj.put(\"result\", true);\n" +
                "end";

        KieSession kieSession = getKieSession(drl);
        Map<String, Object> returnObj = new HashMap<>();
        kieSession.setGlobal("returnObj", returnObj);

        //校验的条件值
        Map<String, Object> data = new HashMap<>();
        data.put("name", "abc");
        data.put("age", 17);
        kieSession.insert(data);
        kieSession.fireAllRules();
        kieSession.dispose();

        if (Boolean.TRUE.equals(returnObj.get("result"))) {
            System.out.println("success");
        } else {
            System.out.println("fail");
        }
    }

    public static KieSession getKieSession(String drl) {
        KieHelper kieHelper = new KieHelper();
        kieHelper.addContent(drl, ResourceType.DRL);

        return kieHelper.build().newKieSession();
    }

}