java的properties资源文件的读取

Posted 2021-11-11 qurui1997

package com.lideng.work325;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;

/**
 * 测试java.Utils的properties类
 * @author Administrator
 *
 */
public class Demo03 {

	/**
	 * @param args
	 */
	private static Properties ps=null;
	static{
		ps=new Properties();
		try {
			ps.load(Thread.currentThread().getContextClassLoader().getResourceAsStream(""));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	public static void main(String[] args) {
			
		setXml();
	}
	
	public static void setXml(){
		Properties ps=new Properties();
		OutputStream os=null;
		FileInputStream is=null;
		try {
			
			ps.setProperty("name", "LD");
			ps.setProperty("password", "admin");
			os = new FileOutputStream("c:/db.xml");
			is=new FileInputStream("c:/db.xml");
			ps.load(is);
			
			ps.storeToXML(os, "");
			
			System.out.println(ps.getProperty("name"));
			System.out.println(ps.getProperty("password"));
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}
	/**
	 * 读取Xml文件信息
	 */
	public static void getXml(){
		Properties ps=new Properties();
		InputStream is;
		try {
			is = new FileInputStream(new File("c:/db.xml"));
			ps.loadFromXML(is);
			System.out.println(ps);
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}
	/**
	 * 从类中加载properties文件
	 */ 
	public static void getPropertes(){
		Properties ps=new Properties();
		try {
			ps.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("db.properties"));
			System.out.println(ps);
			String property = ps.getProperty("url");
			System.out.println(property);
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

}