Vaadin 7-Bean验证

Question

我一直在试用Vaadin 7。首先，我必须说明我对Vaadin是个安静的呆子，对JAVA Perstression不是很熟悉。因此，我试图学习bean验证以及如何使用它。我已经学习了几个教程，但是很难确定哪一个是Vaadin7的最新和正确的教程。尽管如此，我尝试下载并使用JPA容器和BeanValidator，但无法使其工作。下面是我正在使用的代码：

package com.example.firstvaadin;

import java.io.Serializable;

import org.hibernate.validator.constraints.Email;
import javax.validation.constraints.*;

public class RegisterBean implements Serializable{

    public  RegisterBean(String email){
        this.email = email;
    }

    @Size(min = 5, max = 50)
    private String email;

    public void setEmail(String email) {
        this.email = email;
    }

    public String getEmail() {
        return email;
    }
}

而且

RegisterBean rbean = new RegisterBean("");
BeanItem<RegisterBean> item = new BeanItem<RegisterBean>(rbean);
TextField email = new TextField("email",item.getItemProperty("email"));
email.setImmediate(true);
layout.addComponent(email);
email.setNullRepresentation("");

The exception is:
    aused by: com.vaadin.event.ListenerMethod$MethodException: Invocation of method buttonClick in com.example.firstvaadin.LoginView$1 failed.
    at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:528)
    at com.vaadin.event.EventRouter.fireEvent(EventRouter.java:167)
    at com.vaadin.server.AbstractClientConnector.fireEvent(AbstractClientConnector.java:984)
    at com.vaadin.ui.Button.fireClick(Button.java:367)
    at com.vaadin.ui.Button$1.click(Button.java:56)
    ... 28 more
Caused by: java.lang.NoClassDefFoundError: javax/validation/MessageInterpolator$Context
    at com.example.firstvaadin.RegisterView.<init>(RegisterView.java:55)
    at com.example.firstvaadin.LoginView$1.buttonClick(LoginView.java:63)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.vaadin.event.ListenerMethod.receiveEvent(ListenerMethod.java:508)
    ... 32 more
Caused by: java.lang.ClassNotFoundException: javax.validation.MessageInterpolator$Context
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1713)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1558)
    ... 39 more

classmate-0.8.0.jar
hibernate-jpa-2.0-api-1.0.1.Final.jar
hibernate-search-engine-4.3.0.Alpha1.jar
hibernate-search-orm-4.3.0.Alpha1.jar
hibernate-validator-5.0.0.Final.jar
hibernate-validator-annotation-processor-5.0.0.Final.jar
hibernate-validator-cdi-5.0.0.Final.jar
javax.el-2.2.4.jar
javax.el-api-2.2.4.jar
jboss-logging-3.1.1.GA.jar
joda-time-2.1.jar
jsoup-1.7.1.jar
log4j-1.2.17.jar
mysql-connector-java-5.1.22-bin.jar
vaadin-sqlcontainer-1.1.0.jar
validation-api-1.0.0.GA.jar
validation-api-1.1.0.Final.jar

classnotfound异常已消失,但现在有了一个新异常：

Answer 1

您不需要hibernate-validator-annotation-processor-5.0.0.final.jar作为运行时依赖项。这是一个有助于避免在开发过程中错误放置约束的开发库。

关于validation-api，删除validation-api-1.0.0.ga.jar是可行的，因为您要添加同一个库的两个不同版本。validation-api-1.0.0.ga.jar是Bean验证1.0的API版本。这与Hibernate Validator4.3兼容。

validation-api-1.1.0.final.jar是Bean Validation1.1API，它与Hibernate Validator5.x保持一致。由于使用后者，因此需要Bean Validation1.1 API。就这么简单。