properties

java 属性集Properties类

由 穿精又带淫゛_ 提交于 2020-01-23 09:14:37
概述 java.util.Properties 继承于 Hashtable ，来表示一个持久的属性集。它使用键值结构存储数据，每个键及其对应值都是一个字符串。该类也被许多Java类使用，比如获取系统属性时， System.getProperties 方法就是返回一个 Properties 对象。 特点 ： Properties类是Hashtable的子类，所以Map集合中的方法都可以使用。 Properties集合是没有泛型的，所有的key和value值都是字符串。 有和流技术结合的方法，是唯一可以和IO流结合的集合类，当与流结合时可以永久存储数据，其他集合只能暂时存储。 Properties与别的集合的区别是它能保存到流里或者在流中加载，属性列表的每一个键和值都是字符串。 常用方法 1.添加/修改 setProperty(String key,String value); getProperty(String key) 在这个属性列表中搜索指定的键的属性。 load(InputStream inStream) 从输入字节流中读取属性列表（键和元素对）。 load(Reader reader) 从一个简单的行导向格式中读取输入字符流中的属性列表（键和元素对）。 文件中读取属性键值对演示 demo.txt文件 代码 package FileAndIO ; import java .

Dynamic Property of JavaScript object?

由 六眼飞鱼酱① 提交于 2020-01-23 08:33:46
问题 I am wondering if this is possible in JavaScript, I want to have an Object which could contain dynamic properties. Give an example: function MyObject() { } var myobj = new MyObject(); myobj.property1 = "something"; alert(myobj.property1); // something alert(myobj.property2); // this should never report error, instead the property should be evaluated to null, as it has never been set. Is there any way to intercept property calls in JavaScript so I can proactively set a no-value property as

Dynamic Property of JavaScript object?

由 穿精又带淫゛_ 提交于 2020-01-23 08:32:59
问题 I am wondering if this is possible in JavaScript, I want to have an Object which could contain dynamic properties. Give an example: function MyObject() { } var myobj = new MyObject(); myobj.property1 = "something"; alert(myobj.property1); // something alert(myobj.property2); // this should never report error, instead the property should be evaluated to null, as it has never been set. Is there any way to intercept property calls in JavaScript so I can proactively set a no-value property as

Why does hasattr execute the @property decorator code block

由 ◇◆丶佛笑我妖孽 提交于 2020-01-23 06:31:06
问题 In Python when I call the hasattr on a @property decorator the hasattr function actually runs the @property code block. E.g. a class: class GooglePlusUser(object): def __init__(self, master): self.master = master def get_user_id(self): return self.master.google_plus_service.people().get(userId='me').execute()['id'] @property def profile(self): # this runs with hasattr return self.master.google_plus_service.people().get(userId='me').execute() Running the following code calls the profile

Is there a .NET attribute for specifying the “display name” of a property?

由 徘徊边缘 提交于 2020-01-22 17:56:07
问题 Is there a property that allows you to specify a user friendly name for a property in a class? For example, say I have the following class: public class Position { public string EmployeeName { get; set; } public ContactInfo EmployeeContactInfo { get; set; } } I'd like to specify that the display name for the EmployeeName property is "Employee Name" and the display name for the EmployeeContactInfo property is "Employee Contact Information". It's easy enough to write my own attribute class that

Using Python property() inside a method

由 痴心易碎 提交于 2020-01-22 16:46:26
问题 Assuming you know about Python builtin property: http://docs.python.org/library/functions.html#property I want to re-set a object property in this way but, I need to do it inside a method to be able to pass to it some arguments, currently all the web examples of property() are defining the property outside the methods, and trying the obvious... def alpha(self, beta): self.x = property(beta) ...seems not to work, I'm glad if you can show me my concept error or other alternative solutions

Using Python property() inside a method

由 柔情痞子 提交于 2020-01-22 16:46:03
问题 Assuming you know about Python builtin property: http://docs.python.org/library/functions.html#property I want to re-set a object property in this way but, I need to do it inside a method to be able to pass to it some arguments, currently all the web examples of property() are defining the property outside the methods, and trying the obvious... def alpha(self, beta): self.x = property(beta) ...seems not to work, I'm glad if you can show me my concept error or other alternative solutions

Springboot整合kaptcha验证码

由 江枫思渺然 提交于 2020-01-22 15:36:18
pom.xml < dependency > < groupId > com.github.penggle </ groupId > < artifactId > kaptcha </ artifactId > < version > 2.3.2 </ version > </ dependency > KaptchaConfig.java import com . google . code . kaptcha . impl . DefaultKaptcha ; import com . google . code . kaptcha . util . Config ; import org . springframework . context . annotation . Bean ; import org . springframework . stereotype . Component ; import java . util . Properties ; /** * @Description: Kaptcha配置类 */ @Component public class KaptchaConfig { @Bean public DefaultKaptcha getDefaultKaptcha ( ) { DefaultKaptcha defaultKaptcha =

“Cannot create a method for an unnamed component”

由 回眸只為那壹抹淺笑 提交于 2020-01-22 14:28:03
问题 The following code (when registered in a package) gives us a component called TParentComponent registered in the pallet Test . However, when you create a Child object using the Property Editor (provided in the same code), the IDE displays the error message Cannot create a method for an unnamed component. What's strange is that the Child object does indeed have a name. Here's the source: unit TestEditorUnit; interface uses Classes, DesignEditors, DesignIntf; type TParentComponent = class;

springboot 2.0.5.RELEASE单元测试例子

由 假装没事ソ 提交于 2020-01-22 12:55:09
springboot版本：2.0.5.RELEASE jdk:1.8 目标，根据一个properties文件获取内容，并添加到对象上。并通过springboot单元测试 在esources根目录下添加other.properties文件 other.properties内容 other.title=burns other.blog=http://zhongyuele.top/ 在com.esoon.ids.entity包中创建OtherProperties类 OtherProperties.java package com.esoon.ids.entity; import lombok.Data; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; @Component @Data @ConfigurationProperties(prefix = "other") @PropertySource(("classpath:other.properties"))
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