properties

Dynamically access object property using variable

由 大兔子大兔子 提交于 2020-01-16 09:09:33
问题 I'm trying to access a property of an object using a dynamic name. Is this possible? const something = { bar: "Foobar!" }; const foo = 'bar'; something.foo; // The idea is to access something.bar, getting "Foobar!" 回答1: There are two ways to access properties of an object: Dot notation: something.bar Bracket notation: something['bar'] The value between the brackets can be any expression. Therefore, if the property name is stored in a variable, you have to use bracket notation: var foo = 'bar'

Dynamically access object property using variable

由 大城市里の小女人 提交于 2020-01-16 09:09:32
问题 I'm trying to access a property of an object using a dynamic name. Is this possible? const something = { bar: "Foobar!" }; const foo = 'bar'; something.foo; // The idea is to access something.bar, getting "Foobar!" 回答1: There are two ways to access properties of an object: Dot notation: something.bar Bracket notation: something['bar'] The value between the brackets can be any expression. Therefore, if the property name is stored in a variable, you have to use bracket notation: var foo = 'bar'

ChoiceBox with custom Item in a TableView

由 假如想象 提交于 2020-01-16 05:47:22
问题 I have a private TableView<Indicators> tableviewIndicators; with column private TableColumn<Indicators, WindowsItem> tablecolumnFrame; public static class WindowsItem { CustomInternalWindow chrt; private WindowsItem(CustomInternalWindow _chrt) { chrt = _chrt; } public String toString() { return chrt.getTitle(); } } private Indicators(String tl, WindowsItem chrt, String pne, Boolean sel) { this.tool_col = new SimpleStringProperty(tl); if (chrt == null) { this.chart_col = new

SpringBoot 邮件发送

由 假装没事ソ 提交于 2020-01-16 05:10:52
SpringBoot 邮件发送 一 依赖导入 导入 Spring 官方 将 jakarta.mail 又进行进一步封装成开箱即用的 spring-boot-starter-mail 的maven坐标 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency> 二 邮件配置 spring-boot-starter-mail的配置由MailProperties配置类提供。在 application.yml 配置文件中以 spring.mail为前缀 ############### 邮件配置 # 字符集编码 默认 UTF-8 spring.mail.default-encoding=UTF-8 # SMTP 服务器 host qq邮箱的为 smtp.qq.com 端口 465 587 #spring.mail.host=smtp.qq.com # SMTP 服务器端口 不同的服务商不一样 #spring.mail.port=465 # SMTP 服务器使用的协议 #spring.mail.protocol=smtp # SMTP服务器需要身份验证 所以 要配置用户密码 # 发送端的用户邮箱名 #spring

Cannot access parsedVersion value in pom properties

由 邮差的信 提交于 2020-01-16 01:17:26
问题 i am using the maven plugin: <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>build-helper-maven-plugin</artifactId> <version>3.0.0</version> <executions> <execution> <id>parse-version</id> <goals> <goal>parse-version</goal> </goals> </execution> </executions> </plugin> to parse the project version. It works fine: [INFO] --- build-helper-maven-plugin:3.0.0:parse-version (parse-version) [INFO] [INFO] --- maven-antrun-plugin:1.1:run (default) [INFO] Executing tasks [echo] Major: 2

Springboot 使用PageHelper分页插件实现分页

由 喜欢而已 提交于 2020-01-15 16:54:14
一、pom文件中引入依赖 二、application.properties中配置以下内容（二选一方案） 第一种：pagehelper.helper-dialect=mysqlpagehelper.reasonable=truepagehelper.support-methods-arguments=truepagehelper.params=count=countSql第二种：在启动类上添加如下代码 //配置mybatis的分页插件pageHelper @Bean public PageHelper pageHelper(){ PageHelper pageHelper = new PageHelper(); Properties properties = new Properties(); properties.setProperty("offsetAsPageNum","true"); properties.setProperty("rowBoundsWithCount","true"); properties.setProperty("reasonable","true"); properties.setProperty("dialect","mysql"); //配置mysql数据库的方言 pageHelper.setProperties(properties);

How to get data from a property-value table structure?

由 痞子三分冷 提交于 2020-01-15 10:08:44
问题 I got 3 tables as follow: Table 1: FormFields (FieldID, FormID, Title, DateModified, ...) Table 2: ReportItems (ReportItemID, ReportID, FormID, Title, DateModified, ...) Table 3: FormValues (ValueID, FormID, FieldID, Value, UserName, DateModified, ...) For example I have selected 2 Fields of FormFields as my ReportItems. These 2 fields are a question and answer couple. Each question can have 1 answer or it could be NULL. The key is the result should be such a html data list (dl) with 'dt's

Binding Path=myObservableCollection Property Expected

由 ╄→尐↘猪︶ㄣ 提交于 2020-01-15 09:20:29
问题 I have a class called Stockage which inherit of INotifyPropertyChanged. this class set some strings and then create an ObservableCollection of ObservableCollections. This ObservableCollection send values to the several strings set before. Like this: public class Stockage:INotifyPropertyChanged { public string Flag { get; set; } public string GroupeAlerte { get; set; } public string Pmid { get; set; } public string LibellePmrq { get; set; } public string Ligne { get; set; } public string Otm {

关于将web项目从本地部署到阿里云服务器，不能使用stmp协议发送邮件的bug

由 余生颓废 提交于 2020-01-15 07:55:24
目录 问题阐述与解决方式 完整代码 问题阐述与解决方式 最近写的javaweb项目中有用到发送邮件功能，自然会想到使用STMP协议，java也有相应的jar包，于是很快就在本地调试成功，但是部署到阿里云服务器（我的是ubuntu16.04）上总是报错： javax.mail.MessagingException: Could not connect to SMTP host: smtp.qq.com, port: 25; 百度后才知道阿里云服务器 不开放25端口 ，那就需要将25端口（STMP协议）换到465端口（STMPS协议），采用SSL协议加密传输邮件。 百度百科对STMPS的定义如下： SMTPS：465端口是为SMTPS（SMTP-over-SSL）协议服务开放的，这是SMTP协议基于SSL安全协议之上的一种变种协议，它继承了SSL安全协议的非对称加密的高度安全可靠性，可防止邮件泄露。SMTPS和SMTP协议一样，也是用来发送邮件的，只是更安全些，防止邮件被黑客截取泄露，还可实现邮件发送者抗抵赖功能。防止发送者发送之后删除已发邮件，拒不承认发送过这样一份邮件。 既然找到问题了，就开始解决问题吧，具体修改后的配置代码如下： //设置SSL加密方式 MailSSLSocketFactory sf = new MailSSLSocketFactory ( ) ; sf .

Do properties/methods in classes take space in memory?

由 假如想象 提交于 2020-01-15 05:48:44
问题 If we had code like this: public class Enemy { public int hp; } Then an Enemy object would take 4 bytes in 32-bit machines, and 8 bytes in 64-bit (correct me if I'm wrong). If we change it to something like this: public class Enemy { public int hp; public void Attack() {} } An Enemy object would still take the same amount of memory as it did before, right? The same for this: public class Enemy { private int hp; public int Hp { get { return hp; } set { hp = value; } } } From what I know, a
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