上一篇Drools简介中的例子将规则写在了drl文件中，我们还可以动态的拼凑我们想要的规则，代码如下：
@Test public void testKieRuntimeAccess() throws IOException, ClassNotFoundException { String str = ""; str += "package org.drools.compiler.test\n"; str += "import " + Message.class.getName() + "\n"; str += "rule \"Hello World\"\n"; str += "when\n"; str += " Message( )\n"; str += "then\n"; str += " System.out.println( drools.getKieRuntime() );\n"; str += "end\n"; KieBase kbase = KnowledgeBuilderFactory.newKnowledgeBuilder().add(ResourceFactory.newByteArrayResource(str).getBytes()), ResourceType.DRL); kbase = SerializationHelper.serializeObject( kbase ); final KieSession ksession = kbase.newKieSession(); ksession.insert( new Message( "help" ) ); ksession.fireAllRules(); ksession.dispose(); }