我的maven 项目有一个红色感叹号, 而且Problems 存在 errors : Description Resource Path Location Type Archive for required library: 'D:/mvn/repos/junit/junit/3.8.1/junit-3.8.1.jar' in project 'xxx' cannot be read or is not a valid ZIP file ktb-mgr Maven Webapp Build pa…

required,这是HTML5中的一个新属性:这是HTML5中input元素中的一个属性. required译为必须的,在input元素中应用这一属性,就表示这一input元素节点是必填的或者必选的. 用法就是在设计表单时,指定某些选项为必填项(required),只有当用户填写了该选项后,用户才能够提交表单. 栗子: <form action="/backstage">  <input type="text" placeholder="…

看到了http://stackoverflow.com/questions/5547162/eclipse-error-indirectly-referenced-from-required-class-files , 也没搞明白. 后面被证明, 实际上还是Unresolved compilation problems [ERROR] [09-30 11:04:19] org.springframework.web.context.ContextLoader - Context initiali…

今日在写GenericDao时,发现了一个异常,内容如下: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'genericDao' defined in class path resource [spring.common.xml]: Invocation of init method failed; nested exception is java.lang.Ille…

原文链接:http://rxxluowei.iteye.com/blog/671893 今天写第一次写JavaFX的入门程序就GG 遇到了导入API的问题,无奈疯狂地通过网络找解决方案.. 我的问题是: 导入import javafx.application.Application;时 出现这个错误提示 Access restriction: The type 'Application' is not API (restriction on required library 'C:\Progra…

input 里面增加这样的语句: <input type="text" placeholder="您的姓名" required oninvalid="setCustomValidity('请输入您的姓名');" oninput="setCustomValidity('');" />…

HTTP Status 400 - Required String parameter 'userName' is not present 错误 先mark  有时间详细写 参考链接: https://yq.aliyun.com/articles/29107…

真机测试的时候弹出这样的提示:The certificate used to sign ***has either expired or has been revoked. An updated certificate is required to sign and install the application.... 想了想自己清理过本地的证书,于是参照 stackoverflow 上的方法试了下,果然好了.具体流程如下: Shift(⇧) + Command(⌘) + K 或者 Produ…

java.lang.IllegalArgumentException: 'sessionFactory' or 'hibernateTemplate' is required 严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListenerorg.springframework.beans.facto…

Required attribute can be applied to a property of a domain class. EF Code-First will create a NOT NULL column in a database table for a property on which we apply Required attribute. Note that it can also be used with ASP.Net MVC as a validation att…