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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
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import java.util.Set;import javax.validation.ConstraintViolation;import javax.validation.ConstraintViolationException;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.alibaba.dubbo.demo.ValidationParameter;import com.alibaba.dubbo.demo.ValidationService;import com.alibaba.dubbo.rpc.RpcException;public class Consumer { /** * @param args * @throws Exception */ public static void main(String[] args) throws Exception { ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "classpath:consumer.xml" }); context.start(); // DemoService demoService = (DemoService) // context.getBean("demoService"); // while (true) { // String hello = demoService.sayHello("world"); // System.out.println(hello); // // Thread.sleep(100); // } ValidationService validationService = (ValidationService) context.getBean("validationService"); while (true) { ValidationParameter parameter = new ValidationParameter(); parameter.setAge(2); parameter.setEmail("han@qq.com"); try { String result = validationService.intsert(parameter); System.out.println(result); } catch (RpcException e) { // 抛出的是RpcException ConstraintViolationException ve = (ConstraintViolationException) e.getCause(); // 里面嵌了一个ConstraintViolationException Set<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
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<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/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:application name="consumer-of-helloworld-app" /> <!-- 使用zookeeper注册中心暴露发现服务地址 --> <dubbo:registry address="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:reference id="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:reference id="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
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validation="true" |
4、服务提供者配置文件
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<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://code.alibabatech.com/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 提供方应用信息，用于计算依赖关系 --> <dubbo:application name="hello-world" /> <!-- 使用zookeeper注册中心暴露发现服务地址 --> <dubbo:registry address="zookeeper://127.0.0.1:2181" /> <!-- 用dubbo协议在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="com.alibaba.dubbo.demo.DemoService" ref="demoService" /> <!-- 和本地bean一样实现服务 --> <bean id="demoService" class="com.alibaba.dubbo.demo.provider.DemoServiceImpl" /> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="com.alibaba.dubbo.demo.ValidationService" ref="validationService" /> <!-- 和本地bean一样实现服务 --> <bean id="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
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package com.alibaba.dubbo.demo;public interface ValidationService { @interface Intsert { } String intsert(ValidationParameter parameter);} |
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package com.alibaba.dubbo.demo;import java.io.Serializable;import javax.validation.constraints.Max;import javax.validation.constraints.Min;import javax.validation.constraints.Pattern;public class ValidationParameter implements Serializable { private static final long serialVersionUID = 3469571402386167794L; @Pattern(regexp = "^\\s*\\w+(?:\\.{0,1}[\\w-]+)*@[a-zA-Z0-9]+(?:[-.][a-zA-Z0-9]+)*\\.[a-zA-Z]+\\s*$") private String email; @Min(18) // 最小值 @Max(100) // 最大值 private int age; public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public int getAge() { return age; } public void setAge(int age) { this.age = age; }} |
6、服务提供者接口实现类
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package com.alibaba.dubbo.demo.provider;import com.alibaba.dubbo.demo.ValidationParameter;import com.alibaba.dubbo.demo.ValidationService;public class ValidationServiceImpl implements ValidationService { @Override public String intsert(ValidationParameter parameter) { return parameter.getEmail() + "==" + parameter.getAge(); }} |
7、运行客户端程序时，控制台会输出以下信息：
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[ConstraintViolationImpl{interpolatedMessage=‘最小不能小于18‘, propertyPath=age, rootBeanClass=class com.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。
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原文地址：http://www.cnblogs.com/liuzhenhua/p/4820043.html
