How to load Properties file from a static block or static method

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.comdb.user: java2novicedb.password: mypassword