小编Gop*_*opi的帖子

我在谷歌应用引擎上使用JDO.每个"员工"都有一个"密钥".我有一组密钥,想要检索其密钥属于该集合的所有Employees.

所以我使用此处指定的'contains()'过滤器实现了它.代码工作正常,看起来像这样 -

List<Key> keys = getLookupKeys(....) ..//Get keys from somewhere.

Query query = pm.newQuery(Employee.class,":p.contains(key)"); //What is ":P" here?
List<Employee> employees = (List<Employee>) q.execute(keys); //This correctly gives me all I want

我想知道的是这个查询中的这个":P"是什么？Employee对象没有任何名为'p'的字段,我的查询也没有声明任何此类参数.那么'p'指向的是什么？'p'有什么特别的含义吗？

如何使用正则表达式计算每个单词在Java中出现在String中的次数？

class JsTree_JsonData(db.Model):
    JsonData=db.TextProperty()

我无法找到什么是TextProperty

你知道吗 ？

谢谢

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [clinic.ict.service.TestService] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @javax.annotation.Resource(shareable=true, mappedName=, description=, name=, type=class java.lang.Object, authenticationType=CONTAINER)}
    at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:300)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1055)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:871)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423)
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:443)
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:459)
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:340)
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:307)
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:127) …

当您在http响应流(Servlet等)中或使用Content-disposition标头编写一些二进制数据时,确定下载的文件是以只读方式保存还是具有写入权限的因素是什么？我们如何控制是否将其设为只读？该浏览器/操作系统是否依赖？

我有数据存储模型波纹管:

class ThisCategory(search.SearchableModel):
    ancestor = db.ListProperty(db.Key, default=[])
    no_ancestor = db.BooleanProperty(default=True)
    name = db.StringProperty()
    description = db.TextProperty()
    last_modified = db.TimeProperty(auto_now=True) #<----- (1970-01-01 15:36:47.987352) in datastore

如何创建/结果正确现在日期？