zoukankan      html  css  js  c++  java
  • Java中Properties类的操作

    Java中Properties类的操作

     =============================================

    com.gordon.constant

    Constant.java:

    package com.gordon.constant;
    
    public interface Constant {
    	
    	/**
    	 * 根据名称读取常量
    	 * @param name
    	 * @return
    	 */
    	public String get_constant(String name);
    }
    

    SystemConstant4PropImpl.java

    package com.gordon.constant;
    
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.Properties;
    
    public class SystemConstant4PropImpl implements Constant {
    
    	public Properties prop = null;
    
    	public SystemConstant4PropImpl() {
    		InputStream in = ClassLoader.getSystemResourceAsStream("constant.properties");
    		prop = new Properties();
    		try {
    			prop.load(in);
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    	}
    
    	public SystemConstant4PropImpl(String prop_path) {
    		InputStream in = ClassLoader.getSystemResourceAsStream(prop_path);
    		prop = new Properties();
    		try {
    			prop.load(in);
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    	}
    
    	/**
    	 * 获取properties文件中的属性
    	 */
    	@Override
    	public String get_constant(String name) {
    		return prop.getProperty(name);
    	}
    }
    

    SystemConstant4XMLImpl.java

    package com.gordon.constant;
    
    public class SystemConstant4XMLImpl {
    	
    }
    

    com.grodon.test

    TestConstantClass.java:

    package com.gordon.test;
    
    import org.junit.Test;
    
    import com.gordon.constant.SystemConstant4PropImpl;
    
    public class TestConstantClass {
    	@Test
    	public void run() {
    		try {
    			SystemConstant4PropImpl scp = new SystemConstant4PropImpl();
    			String db_username = scp.get_constant("db.username");
    			System.out.println(db_username);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    }
    

    constant.properties:

    db.username=root
    

    运行结果:

  • 相关阅读:
    setInterval的停止与启动
    postgresql常用
    STM32学习笔记(四) RCC外设的学习和理解
    STM32学习笔记(九) 外部中断,待机模式和事件唤醒
    STM32的优先级的理解及其使用
    基于STM32的红外遥控重点解析
    红外协议之NEC协议
    常用运放选型一览表
    运放参数解释及常用运放选型
    算放大器分析----虚短和虚断(转载)
  • 原文地址:https://www.cnblogs.com/hfultrastrong/p/7611536.html
Copyright © 2011-2022 走看看