Bean Validation和Hibernate Validator使用小记

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1.pom.xml

        <!-- https://mvnrepository.com/artifact/junit/junit -->        <dependency>            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.12</version>            <scope>test</scope>        </dependency>        <dependency>            <groupId>org.hibernate</groupId>            <artifactId>hibernate-validator</artifactId>            <version>5.4.0.Final</version>        </dependency>        <!-- https://mvnrepository.com/artifact/org.glassfish.web/el-impl -->        <dependency>            <groupId>org.glassfish.web</groupId>            <artifactId>el-impl</artifactId>            <version>2.2</version>        </dependency>

注意:如果异常提示:

java.lang.ClassNotFoundException: com.sun.el.ExpressionFactoryImpl

很可能是少el-impl依赖

2.消息文件是什么?

默认是:ValidationMessages.properties,我发现也有用:ValidatorMessages.properties,当然文件可以随意命名,不是默认的文件名的话要自已设置messageInterpolator,hibernate validation文档很全.可以多看看

3.消息文件放在哪?
3.1 用spring可以放在classpath,也可以放到WEB-INF下,需要在相应的配置文件中配一个ReloadableResourceBundleMessageSource bean.

3.2 maven项目和SE下放到资源文件中
项目名/src/main/resources

布署时如需要布到其它路径可以用maven插件

3.3 验证消息文件是否路径正确?

import java.util.Locale;import java.util.ResourceBundle;import javax.validation.Validation;import javax.validation.Validator;import javax.validation.ValidatorFactory;import org.hibernate.validator.resourceloading.PlatformResourceBundleLocator;import org.junit.Before;import org.junit.Test;import static org.junit.Assert.*;/** * * @author xiaofanku */public class hibernateResourceTest {    private Validator validator;    @Before    public void setUp() {        ValidatorFactory factory=Validation.buildDefaultValidatorFactory();        validator = factory.getValidator();    }    //项目名/src/main/resources/ValidationMessages_zh_CN.properties    @Test    public void hello() {        PlatformResourceBundleLocator prbl=new PlatformResourceBundleLocator( "ValidationMessages" );        ResourceBundle rb=prbl.getResourceBundle(Locale.CHINESE);        //资源文件测试        assertTrue(rb.containsKey("NotNull.artilceForm.title"));    }}

4.错误消息的内容
4.1类中

public class Car {    @NotNull(message = "The manufacturer name must not be null")    private String manufacturer;}

4.2在消息文件(ValidationMessages.properties)中
4.2.1 注解是hibernate.validator.constraints

validator.notEmpty=属性需要一个输入值

4.2.2 注解是javax.validation.constraints

javax.validation.constraints.NotNull.message=这是一个必填的输入

4.2.3 自定义的constraints

[Example 63. Defining a custom error message for the CheckCase constraint](http://docs.jboss.org/hibernate/stable/validator/reference/en-US/html_single/#validator-customconstraints)

4.3针对属性自定义消息
类:

public class ArticleForm {    @NotNull(message="{NotNull.artilceForm.title}")    private String title;}

消息文件:

NotNull.artilceForm.title=标题不可以为空

5.学习资源:
Hibernate Validator 5.4.1.Final - JSR 349 Reference Implementation: Reference Guide

JSR 303 - Bean Validation 介绍及最佳实践

21 Introduction to Bean Validation

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