Drools+Springboot动态加载规则的问题

最近在学习Drools，整合springBoot之后出现了一些问题，
当我使用普通的规则文件来加载项目的时候，并没有问题，但是当我把规则作为字符串存入数据库，再从数据库读取时却出现了问题：

     //用rule代替数据库中取出的规则String
 String rule="package com.rules.Person \r\n";
    rule+="import com.po.Person \r\n";
    rule+="global Integer ALG \r\n";
    rule+="rule \"Personhotel\" \r\n";
    rule+="when \r\n";
    rule+="person : Person(hotelTime>0,name==\"22\") \r\n";
    rule+="then \r\n";
    rule+="System.out.println( \"name is : \"+person.getName()+\" hotel score is: \"+ 
                             (person.getHotelTime()*5+ALG)); \r\n";
    rule+="person.setTravelTimes(person.getHotelTime()); \r\n";
    rule+="end \r\n";
    KnowledgeBuilder kb = KnowledgeBuilderFactory.newKnowledgeBuilder(); 
    kb.add(ResourceFactory.newByteArrayResource(rule.getBytes("UTF-8")), ResourceType.DRL);
    KnowledgeBuilderErrors errors = kb.getErrors();  
    KnowledgeBase kBase = KnowledgeBaseFactory.newKnowledgeBase();  
            kBase.addKnowledgePackages(kb.getKnowledgePackages());    
            KieSession kSession  = kBase.newStatefulKnowledgeSession(); 
             Integer a=new Integer(11);
             kSession.setGlobal("ALG", a);
    person.setHotelTime(2);
    person.setName("22");
    kSession.insert(person);
    kSession.fireAllRules();
    kSession.dispose();

先是有全局变量未定义的问题，在去掉全局变量之后，执行完成后规则其实并未生效。求大神解答