properties | 易学教程

Spring @Value annotation in @Controller class not evaluating to value inside properties file

阅读更多关于 Spring @Value annotation in @Controller class not evaluating to value inside properties file

问题 I am new to Spring and trying to inject a string with a value using the @Value("${loginpage.message}") annotation inside of a controller annotated with the @Controller annotation and the value of my string is being evaluated as the string "${loginpage.message}" and not what is inside my properties file. Below is my controller with the string 'message' that I want to inject. @Controller public class LoginController extends BaseController { @Value("${loginpage.message}") private String message;

Auto-implemented getters and setters vs. public fields

阅读更多关于 Auto-implemented getters and setters vs. public fields

问题 I see a lot of example code for C# classes that does this: public class Point { public int x { get; set; } public int y { get; set; } } Or, in older code, the same with an explicit private backing value and without the new auto-implemented properties: public class Point { private int _x; private int _y; public int x { get { return _x; } set { _x = value; } } public int y { get { return _y; } set { _y = value; } } } My question is why. Is there any functional difference between doing the above

Read properties file outside JAR file

阅读更多关于 Read properties file outside JAR file

问题 I have a JAR file where all my code is archived for running. I have to access a properties file which need to be changed/edited before each run. I want to keep the properties file in the same directory where the JAR file is. Is there anyway to tell Java to pick up the properties file from that directory ? Note: I do not want to keep the properties file in home directory or pass the path of the properties file in command line argument. 回答1: So, you want to treat your .properties file on the

Java加载配置文件类

阅读更多关于 Java加载配置文件类

/** * 对应配置文件类， */ package com.up72.parkSys.ThirdParty; import java.io.IOException; import java.io.InputStream; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Properties; public final class StaApiConfig { /** * 调试变量，用以打印调试错误信息 */ public static boolean DEBUG = false; /** * 系统配置文件名称例如：xxxxx.properties配置文件 */ private final static String SYSTEM_CONFIG = "StaApiConfig.properties"; /** * 单子模式实例 */ private static StaApiConfig config; /** * map */ private Map<String, String> params; private StaApiConfig() { load(); } /** * 单子模式实例方法 * * @return */ public

ibatis 2.3 问题

阅读更多关于 ibatis 2.3 问题

这几天一直在看ibatis相关的东西。昨晚想写个demo例子试着玩一下，谁知道一玩就出了问题。配置文件如下: <?xml version="1.0" encoding="UTF-8"?>  <!DOCTYPE sqlMapConfig PUBLIC "-//ibatis.apache.org//DTD SQL Map Config 2.0//EN" "http://ibatis.apache.org/dtd/sql-map-config-2.dtd"> <sqlMapConfig> <settings enhancementEnabled="true" maxTransactions="32" maxRequests="512" maxSessions="128" cacheModelsEnabled="true" lazyLoadingEnabled="false" statementCachingEnabled="false" useStatementNamespaces="true" />  <properties resource="com/mobel

How to store reference to Class' property and access an instance's property by that? [closed]

阅读更多关于 How to store reference to Class' property and access an instance's property by that? [closed]

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 6 years ago . How do I keep some sort of link to a class' property and then use that to access an instance's property? Thing is there are no class instances where the link is created. The idea is to remember the property

Properties类序列化和反序列化Object 、Print

阅读更多关于 Properties类序列化和反序列化Object 、Print

Summarize ： Properties ：是map的子类，存储String类型键值对的双列集合，它的后缀格式为 .properties 文件只允许有键值对和注释(不能写中文)，一行是一个键值对 , 不能有任何符号序列化流（ Object O utputStream ）和反序列化流（ Object I utputStream ）：对文件的写和读　　打印流：分字符和字节打印流最明显的特点写什么就打印什么，原样输出，还有自动刷新和换行功能 Properties类：特点： ①： Hashtable 的子类，map集合中的方法都可用 ②：该集合没有泛型，键值必须是字符串String类型 ③：可以持久化的属性集，键值可存储在集合中，也可存储在持久化的设备上，键值的来源也可以是持久化的设备。方法： load(InputStream) 把指定流所对应的文件中的数据，读取出来，保存到 Properties 集合中 store(OutputStream,comments) 把集合中的数据，保存到指定的流所对应的文件中，后面的参数代表对描述信息--一个注释，可以是空字符串创建后缀名为 .properties 的文件 #this is a person #Tue Jun 18 11:25:42 CST 2019 age=123 name=zhangsan #this is

JS Cannot read property “length” of undefined [closed]

阅读更多关于 JS Cannot read property “length” of undefined [closed]

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . I'm trying to create an object using a given string where each word has a property stating its length. var strings = {}; function findLongestWord(str) { var splitStr = str.split(" "); for (var i = 0; i <= str.length; i++){ strings[splitStr[i]] = splitStr[i].length; } return strings; } findLongestWord("The quick

Set C# Property Value by Javascript

阅读更多关于 Set C# Property Value by Javascript

问题 I have a C# Property CategoryID , I want to set it's value in Javascript. I am trying to set the value CategoryID like below: var sPath = window.location.pathname; var catId = null; var sPage = sPath.substring(sPath.lastIndexOf('/') + 1); if (sPage == 'xyz.aspx') { <%=CommonUtility.CategoryID=4%>; } else if(sPage == 'zxy.aspx') { <%=CommonUtility.CategoryID=5%>; } But by this method I always get the value of CategoryID = 5(which is in else block) . Please suggest me how can get the Property

ClassLoader详解及用途

阅读更多关于 ClassLoader详解及用途

【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> ClassLoader主要对类的请求提供服务，当JVM需要某类时，它根据名称向ClassLoader要求这个类，然后由ClassLoader返回这个类的class对象。 1.1 几个相关概念ClassLoader负责载入系统的所有Resources（Class，文件，来自网络的字节流等），通过ClassLoader从而将资源载入JVM 每个class都有一个reference，指向自己的ClassLoader。Class.getClassLoader() array的ClassLoader就是其元素的ClassLoader，若是基本数据类型，则这个array没有ClassLoader 1.2 主要方法和工作过程Java1.1及从前版本中，ClassLoader主要方法： Class loadClass( String name, boolean resolve ); ClassLoader.loadClass() 是 ClassLoader 的入口点 defineClass 方法是 ClassLoader 的主要诀窍。该方法接受由原始字节组成的数组并把它转换成 Class 对象。原始数组包含如从文件系统或网络装入的数据。 findSystemClass 方法从本地文件系统装入文件