Drools规则引擎drl文件语法_drl文件用什么打开

参考博客链接：https://www.cnblogs.com/atomicbomb/p/7251814.html

drl文件内包含：包路径，引用，规则体

package:包路径，改路径是逻辑路径（第一行）

import:导入外部变量，类（可以是类的静态方法）

globals：全局变量

functions:函数

queries:查询

rule:规则体，以rule开头，已end结尾，每个文件可以包含多个rule，规则体有三个部分：LHS,RHS,属性

    LHS:(Left Hand Side) 条件部分，在when和then中间的部分；可以包含0~n个条件；为空的话引擎会自动添加一个eval(true)的条件。

     RHS:(right hand side) 在then后的部分，满足LHS的条件，执行RHS;这部分可以直接编写java代码；可以对fact进行增删改的操作

import com.sutpc.maas.orderbook.domain.Order;
import com.sutpc.maas.orderbook.domain.StaffType;import com.sutpc.maas.orderbook.domain.OrderType;
import com.sutpc.maas.orderbook.domain.ConnectionType;
import com.sutpc.maas.orderbook.domain.Price;
import com.sutpc.maas.orderbook.domain.DiscountType
import java.math.BigDecimal;
 
function  Boolean containStr(String routeNo,String routeNos){
        Boolean isContain = routeNos.contains(routeNo);
        return isContain;
}
 
function Price queryPrice(Double routePrice){
    Price price = new Price();
    price.setPrice(routePrice);
    price.setActualPrice(routePrice);
    price.setDiscountType(DiscountType.NON);
    return price;
}
function Price calculatePrice(Double amount,Double discount){
    Price price = new Price();
    BigDecimal b = new BigDecimal(amount);
    amount = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
    price.setPrice(amount);
    Double actualPrice = amount*discount;
    actualPrice = new BigDecimal(actualPrice).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
    price.setActualPrice(actualPrice);
    price.setDiscountType(DiscountType.DISCOUNT);
    return price;
}
rule "rule1"
    no-loop true
    when
        $order:Order(StaffType.INTERNAL==passenger.getType()&&orderType==OrderType.IMMED&&containStr(route.routeNo,"K4"))
    then
        System.out.println("进入rule1");
        Price price = new Price();
        price.setPrice($order.getRoute().getRoutePrice());
        price.setActualPrice(2.4);
        price.setDiscountType(DiscountType.FIX);
        $order.setPrice(price);
        update($order);
     end
rule "rule2"
    no-loop true
    when
        $order:Order(StaffType.EXTERNAL==passenger.getType()&&orderType==OrderType.IMMED&&containStr(route.routeNo,"K4"))
    then
        System.out.println("进入rule2");
        Price price = queryPrice($order.getRoute().getRoutePrice());
        $order.setPrice(price);
        update($order);
    end
rule "rule3"
    no-loop true
    when
        $order:Order(StaffType.EXTERNAL==passenger.getType()&&orderType==OrderType.IMMED&&containStr(route.routeNo,"K1,K2"))
    then
        System.out.println("进入rule3");
        Price price = queryPrice($order.getRoute().getRoutePrice());
        $order.setPrice(price);
        update($order);
    end
rule "rule4"
    no-loop true
    when
        $order:Order(StaffType.INTERNAL==passenger.getType()&&orderType==OrderType.IMMED&&containStr(route.routeNo,"K1,K2"))
    then
        System.out.println("进入rule4");
        Price price = new Price();
        price.setPrice($order.getRoute().getRoutePrice());
        price.setActualPrice(0.0);
        price.setDiscountType(DiscountType.FIX);
        $order.setPrice(price);
        update($order);
    end
rule "rule5"
    no-loop true
    when
        $order:Order(orderType==OrderType.IMMED&&containStr(route.routeNo,"C1-2")&&ConnectionType.UNITE==connectedTrip.connectionType&&numOfPeople==1)
    then
        System.out.println("进入rule5");
        Price price = queryPrice($order.getRoute().getRoutePrice());
        $order.setPrice(price);
        update($order);
    end
rule "rule6"
    no-loop true
    when
        $order:Order(orderType==OrderType.IMMED&&containStr(route.routeNo,"C1-2")&&ConnectionType.UNITE==connectedTrip.connectionType&&numOfPeople==2)
    then
        System.out.println("进入rule6");
        Double amount = $order.getRoute().getRoutePrice()*$order.getNumOfPeople();
        Price price = calculatePrice(amount,0.8);
        $order.setPrice(price);
        update($order);
    end
rule "rule7"
    no-loop true
    when
        $order:Order(orderType==OrderType.IMMED&&containStr(route.routeNo,"C1-2")&&ConnectionType.UNITE==connectedTrip.connectionType&&numOfPeople==3)
    then
        System.out.println("进入rule6");
        Double amount = $order.getRoute().getRoutePrice()*$order.getNumOfPeople();
        Price price = calculatePrice(amount,0.6);
        $order.setPrice(price);
        update($order);
    end
rule "rule8"
    no-loop true
    when
        $order:Order(orderType==OrderType.IMMED&&containStr(route.routeNo,"C1-2")&&ConnectionType.UNITE==connectedTrip.connectionType&&numOfPeople>3)
    then
        System.out.println("进入rule6");
        Double amount = $order.getRoute().getRoutePrice()*$order.getNumOfPeople();
        Price price = calculatePrice(amount,0.5);
        $order.setPrice(price);
        update($order);
    end