独角兽企业重金招聘Python工程师标准>>>
开始，先说一句，还是用maven的好
1、由于没用maven，和对dubbo不是很了解的原因，这次，总因为jar包不对，而导致：dubbo客户端程序，启动不起来
所以决定：将原来用过的所有jar包全部去，将dubbo-demo-provider-2.5.4-SNAPSHOT/lib下的所有jar包全部导入项目中
一切就OK了
2、服务消费者代码
importjava.util.Set;importjavax.validation.ConstraintViolation;importjavax.validation.ConstraintViolationException;importorg.springframework.context.support.ClassPathXmlApplicationContext;importcom.alibaba.dubbo.demo.ValidationParameter;importcom.alibaba.dubbo.demo.ValidationService;importcom.alibaba.dubbo.rpc.RpcException;publicclassConsumer{/***@paramargs*@throwsException*/publicstaticvoidmain(String[]args)throwsException{ClassPathXmlApplicationContextcontext=newClassPathXmlApplicationContext(newString[]{"classpath:consumer.xml"});context.start();//DemoServicedemoService=(DemoService)//context.getBean("demoService");//while(true){//Stringhello=demoService.sayHello("world");//System.out.println(hello);////Thread.sleep(100);//}ValidationServicevalidationService=(ValidationService)context.getBean("validationService");while(true){ValidationParameterparameter=newValidationParameter();parameter.setAge(2);parameter.setEmail("han@");try{Stringresult=validationService.intsert(parameter);System.out.println(result);}catch(RpcExceptione){//抛出的是RpcExceptionConstraintViolationExceptionve=(ConstraintViolationException)e.getCause();//里面嵌了一个ConstraintViolationExceptionSet<ConstraintViolation<?>>violations=ve.getConstraintViolations();//可以拿到一个验证错误详细信息的集合System.out.println(violations);}}}}
3、服务消费者配置文件
<?xmlversion="1.0"encoding="UTF-8"?><beansxmlns="/schema/beans"xmlns:xsi="/2001/XMLSchema-instance"xmlns:dubbo="/schema/dubbo"xsi:schemaLocation="/schema/beans/schema/beans/spring-beans.xsd/schema/dubbo/schema/dubbo/dubbo.xsd"><!--消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样--><dubbo:applicationname="consumer-of-helloworld-app"/><!--使用zookeeper注册中心暴露发现服务地址--><dubbo:registryaddress="zookeeper://127.0.0.1:2181"/><!--生成远程服务代理，可以和本地bean一样使用demoService--><dubbo:referenceid="demoService"interface="com.alibaba.dubbo.demo.DemoService"retries="2"/><!--生成远程服务代理，可以和本地bean一样使用demoService--><dubbo:referenceid="validationService"interface="com.alibaba.dubbo.demo.ValidationService"retries="2"validation="true"/></beans>
注：重点关注一下，带有下面信息的那一行，就OK了，此处表明，是在客户端侧进行参数验证
validation="true"
4、服务提供者配置文件
<?xmlversion="1.0"encoding="UTF-8"?><beansxmlns="/schema/beans"xmlns:xsi="/2001/XMLSchema-instance"xmlns:dubbo="/schema/dubbo"xsi:schemaLocation="/schema/beans/schema/beans/spring-beans.xsd/schema/dubbo/schema/dubbo/dubbo.xsd"><!--提供方应用信息，用于计算依赖关系--><dubbo:applicationname="hello-world"/><!--使用zookeeper注册中心暴露发现服务地址--><dubbo:registryaddress="zookeeper://127.0.0.1:2181"/><!--用dubbo协议在20880端口暴露服务--><dubbo:protocolname="dubbo"port="20880"/><!--声明需要暴露的服务接口--><dubbo:serviceinterface="com.alibaba.dubbo.demo.DemoService"ref="demoService"/><!--和本地bean一样实现服务--><beanid="demoService"class="com.alibaba.dubbo.demo.provider.DemoServiceImpl"/><!--声明需要暴露的服务接口--><dubbo:serviceinterface="com.alibaba.dubbo.demo.ValidationService"ref="validationService"/><!--和本地bean一样实现服务--><beanid="validationService"class="com.alibaba.dubbo.demo.provider.ValidationServiceImpl"/></beans>
5、服务消费者和提供者共用的类和接口
packagecom.alibaba.dubbo.demo;publicinterfaceValidationService{@interfaceIntsert{}Stringintsert(ValidationParameterparameter);}
packagecom.alibaba.dubbo.demo;importjava.io.Serializable;importjavax.validation.constraints.Max;importjavax.validation.constraints.Min;importjavax.validation.constraints.Pattern;publicclassValidationParameterimplementsSerializable{privatestaticfinallongserialVersionUID=3469571402386167794L;@Pattern(regexp="^\\s*\\w+(?:\\.{0,1}[\\w-]+)*@[a-zA-Z0-9]+(?:[-.][a-zA-Z0-9]+)*\\.[a-zA-Z]+\\s*$")privateStringemail;@Min(18)//最小值@Max(100)//最大值privateintage;publicStringgetEmail(){returnemail;}publicvoidsetEmail(Stringemail){this.email=email;}publicintgetAge(){returnage;}publicvoidsetAge(intage){this.age=age;}}
6、服务提供者接口实现类
packagecom.alibaba.dubbo.demo.provider;importcom.alibaba.dubbo.demo.ValidationParameter;importcom.alibaba.dubbo.demo.ValidationService;publicclassValidationServiceImplimplementsValidationService{@OverridepublicStringintsert(ValidationParameterparameter){returnparameter.getEmail()+"=="+parameter.getAge();}}
7、运行客户端程序时，控制台会输出以下信息：
[ConstraintViolationImpl{interpolatedMessage='最小不能小于18',propertyPath=age,rootBeanClass=classcom.alibaba.dubbo.demo.ValidationParameter,messageTemplate='{javax.validation.constraints.Min.message}'}]
8、OK，此时已经可以验证，参数验证已经开始起作用了。
