How to load Properties file from a static block or static method-优快云博客

本文展示了如何在Java中使用静态块从资源路径读取属性文件，并通过方法获取属性值。

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通常，通用类会从静态上下文读取属性文件，这下面是一个例子

mport java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.util.Properties;

public class MyPropInStaticBlock {

private static Properties prop;

static {

InputStream is = null ;

try {

prop = new Properties();

is = ClassLoader. class .getResourceAsStream( "/sample.properties" );

prop.load(is);

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

public static String getPropertyValue(String key){

return prop.getProperty(key);

}

public static void main(String a[]){

System.out.println( "db.host: " +getPropertyValue( "db.host" ));

System.out.println( "db.user: " +getPropertyValue( "db.user" ));

System.out.println( "db.password: " +getPropertyValue( "db.password" ));

}

sample.properties

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           db.host=appdomain.java2novice.com
          
           db.user=java2novice
          
           db.password=mypassword
          
           db.service=orcl

Output:

db.host: appdomain.java2novice.com
db.user: java2novice
db.password: mypassword