在Application.java中包含以下代码,作为程序的入口点: packagecom.example.demo;importorg.springframework.boot.SpringApplication;importorg.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublicclassApplication{publicstaticvoidmain(String[]args){SpringApplication.run(Application.class,args);...
首先,假设配置文件config.properties如下所示: class1=com.example.Class1class2=com.example.Class2 1. 2. 然后创建一个类Loader来加载配置文件中指定的类: importjava.io.IOException;importjava.io.InputStream;importjava.util.Properties;publicclassLoader{publicstaticvoidmain(String[]args){Propertiesproperties=n...
util.Properties; import java.util.Set; public class Demo { public static void main(String[] args) { //创建集合对象 Properties prop = new Properties(); //Object setProperty(String key, String value):设置集合的键和值,都是String类型,底层调用Hashtable方法put prop.setProperty("001", "小明");...
1.1 顺序错乱的原因 大部分代码都是使用了java.util.Properties类来转换,这个类是基于ConcurrentHashMap来存储键值对的,必然会顺序错乱 这是截取的Properties类的部分源码: /*** Properties does not store values in its inherited Hashtable, but instead* in an internal ConcurrentHashMap. Synchronization is omitt...
importjava.util.*;publicclassPropDemo{publicstaticvoidmain(Stringargs[]){Propertiescapitals=newProperties();Setstates;Stringstr;capitals.put("Illinois","Springfield");capitals.put("Missouri","Jefferson City");capitals.put("Washington","Olympia");capitals.put("California","Sacramento");capitals.put(...
publicclassMain{publicstaticvoidmain(String[]args){Properties properties=newProperties();//存入键值对properties.setProperty("one","1");properties.setProperty("two","2");//拿出所有键Set<String>strings=properties.stringPropertyNames();//遍历键for(String string:strings){//通过键获取值String property=...
1.properties文件在classpath根路径下读取方式 Properties properties =newProperties(); properties.load(BlogIndex.class.getResourceAsStream("/config.properties")); 2.properties文件在package路径下读取方式 Properties properties =newProperties(); properties.load(BlogIndex.class.getResourceAsStream("com/test/conf...
properties是配置文件。 主要的作用是通过修改配置文件可以方便地修改代码中的参数,实现不用改class文件即可灵活变更参数。解释:java运行中java文件会变成class文件,之后无法通过反编译找到原样的代码,这样的话,如果java类中某个参数变更,就很难灵活的实现参数修改,这个时候properties 文件就能很灵活的实现配置,减少...
Java Classpath及.properties配置文件 private static final String CONFIG_FILE = "logmonitor.properties"; ClassLoader cl =ClassLoader.getSystemClassLoader(); input= cl.getResourceAsStream(fileName); 需要改成 ClassLoader cl = PerfCoalescingStatisticsUtil.class.getClassLoader();...
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