示例
想完整的运行起来，请参见：快速启动，这里只列出各种场景的配置方式
参数验证
参数验证功能是基于JSR303实现的，用户只需标识JSR303标准的验证Annotation，并通过声明filter来实现验证。
2.1.0以上版本支持
验证方式可扩展，参见：Validation扩展点
参数标注示例：
import java.io.Serializable;
import java.util.Date;
import javax.validation.constraints.Future;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Past;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
public class ValidationParameter implements Serializable {
private static final long serialVersionUID = 7158911668568000392L;
@NotNull // 不允许为空
@Size(min = 1, max = 20) // 长度或大小范围
private String name;
@NotNull(groups = ValidationService.Save.class) // 保存时不允许为空，更新时允许为空 ，表示不更新该字段
@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;
@Past // 必须为一个过去的时间
private Date loginDate;
@Future // 必须为一个未来的时间
private Date expiryDate;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
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;
}
public Date getLoginDate() {
return loginDate;
}
public void setLoginDate(Date loginDate) {
this.loginDate = loginDate;
}
public Date getExpiryDate() {
return expiryDate;
}
public void setExpiryDate(Date expiryDate) {
this.expiryDate = expiryDate;
}
}
分组验证示例：
public interface ValidationService { // 缺省可按服务接口区分验证场景，如：@NotNull(groups = ValidationService.class)
@interface Save{} // 与方法同名接口，首字母大写，用于区分验证场景，如：@NotNull(groups = ValidationService.Save.class)，可选
void save(ValidationParameter parameter);
void update(ValidationParameter parameter);
}
关联验证示例：
import javax.validation.GroupSequence;
public interface ValidationService {
@GroupSequence(Update.class) // 同时验证Update组规则
@interface Save{}
void save(ValidationParameter parameter);
@interface Update{}
void update(ValidationParameter parameter);
}
参数验证示例：
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
public interface ValidationService {
void save(@NotNull ValidationParameter parameter); // 验证参数不为空
void delete(@Min(1) int id); // 直接对基本类型参数验证
}
在客户端验证参数：
<dubbo:reference id="validationService" interface="com.alibaba.dubbo.examples.validation.api.ValidationService" validation="true" />
在服务器端验证参数：
<dubbo:service interface="com.alibaba.dubbo.examples.validation.api.ValidationService" ref="validationService" validation="true" />
验证异常信息：
import javax.validation.ConstraintViolationException;
import javax.validation.ConstraintViolationException;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.alibaba.dubbo.examples.validation.api.ValidationParameter;
import com.alibaba.dubbo.examples.validation.api.ValidationService;
import com.alibaba.dubbo.rpc.RpcException;
public class ValidationConsumer {
public static void main(String[] args) throws Exception {
String config = ValidationConsumer.class.getPackage().getName().replace('.', '/') + "/validation-consumer.xml";
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(config);
context.start();
ValidationService validationService = (ValidationService)context.getBean("validationService");
// Error
try {
parameter = new ValidationParameter();
validationService.save(parameter);
System.out.println("Validation ERROR");
} 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);
}
}
}
需要加入依赖：
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.2.0.Final</version>
</dependency>
啦啦啦