BeanCreationException entityManagerFactory NoClassDefFoundError ValidatorFactory

Question

我的项目一直运行得很好，直到我在我的POM中添加了'hibernate-validator‘来为@RequestBody对象使用@Valid特性的REST请求。

我有一台NoClassDefFoundError

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in ServletContext resource [/WEB-INF/spring/app-context.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: javax/validation/ValidatorFactory
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
Caused by: java.lang.NoClassDefFoundError: javax/validation/ValidatorFactory
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    ... 21 more
Caused by: java.lang.ClassNotFoundException: javax.validation.ValidatorFactory
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 35 more

我的POM是

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最后一行是出问题的，我已经尝试了几个版本，但都没有成功

Answer 1

添加

    <dependency>
       <groupId>javax.validation</groupId>
       <artifactId>validation-api</artifactId>
       <version>1.0.0.GA</version> 
    </dependency>

Answer 2

转到.m2存储库并删除org/hibernate/ path下的文件夹。现在清理项目并再次构建项目。这可能会工作得很好。

Answer 3

上面的答案都没有解决我的问题，所以我决定开发我自己的验证器

一个新的注解接口

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD) //can use in fields only.
public @interface Required {

}

和一个基类来扩展我需要验证的所有对象(在spring REST @RequestBody)

public void validate(){
    Field[] fields = this.getClass().getDeclaredFields();
    for (Field field : fields) {
        if (field.isAnnotationPresent(Required.class)) {
            Object value;
            field.setAccessible(true);
            try {
                boolean fail = false;
                value = field.get(this);
                if (value==null){
                    fail = true;
                }
                if (value instanceof String && ((String) value).isEmpty()){
                    fail = true;
                }
                if (value instanceof List && ((List<?>) value).isEmpty()){
                    fail = true;
                }
                if (fail){
                    throw new PreconditionFailedException("attribute '" + field.getName() + "' cannot be empty");
                }
            } 
            catch (IllegalArgumentException e) {
                e.printStackTrace();
            } 
            catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }
}