java 操做屬性文件

package com.demo.test;

import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.util.Iterator; import java.util.Properties; import java.util.Map.Entry;

import javax.servlet.ServletException;

public class Test { public static void main(String[] args) { systenGet(); filestreamGet(); filestreamGetSrc(); classloaderGet(); classLoadUTFGet(); init(); setProParams(); } /** * system讀取propertise文件 / public static void systenGet(){ Properties properties=System.getProperties(); System.out.println(properties.getProperty("user.dir")); System.out.println("全局系統參數key_______:"+System.getProperty("000000")); } /* * 屬相文件信息 / public static void filestreamGet() { Properties p = new Properties(); try { FileInputStream fileInputStream = new FileInputStream("test.properties"); p.load(fileInputStream); System.out.println("工程下___:" + p.getProperty("000000")); fileInputStream.close(); } catch (Exception e) { e.printStackTrace(); } } public static void filestreamGetSrc() { Properties p = new Properties(); try { FileInputStream fileInputStream = new FileInputStream("test.properties"); p.load(fileInputStream); System.out.println("工程src下___:"+p.getProperty("000000")); fileInputStream.close(); } catch (Exception e) { e.printStackTrace(); } } /* * classloader讀取屬性文件 / public static void classloaderGet(){ ClassLoader load=ClassLoader.getSystemClassLoader(); Properties p=new Properties(); try { p.load(load.getResourceAsStream("code.properties")); } catch (IOException e) { e.printStackTrace(); } System.out.println(p.getProperty("000000")); } /* * 讀取properties 文件亂碼解決方法 / public static void classLoadUTFGet(){ ClassLoader load=ClassLoader.getSystemClassLoader(); Properties p=new Properties(); try { p.load(new InputStreamReader(load.getResourceAsStream("code.properties"), "UTF-8")); } catch (IOException e) { e.printStackTrace(); } System.out.println("解決中文亂碼的方法___:"+p.getProperty("000000")); } public static void init(){ try { Properties prop = new Properties(); FileInputStream fis = null; fis = new FileInputStream("src/config.properties"); prop.load(fis); Iterator<Entry<Object, Object>> itr = prop.entrySet().iterator(); while (itr.hasNext()) { Entry<Object, Object> e = itr.next(); System.setProperty(e.getKey().toString(), e.getValue().toString()); } } catch (Exception e) { e.printStackTrace(); } } /* * 項目啓動時 加載屬性文件數據到系統內存中 */ public static void setProParams(){ try { ClassLoader load=ClassLoader.getSystemClassLoader(); Properties properties=new Properties(); properties.load(new InputStreamReader(load.getResourceAsStream("config.properties"), "UTF-8")); Iterator<Entry<Object, Object>>iterator=properties.entrySet().iterator(); while(iterator.hasNext()){ Entry<Object, Object> e = iterator.next(); System.out.println("建本地屬性文件寫到內存中___:{"+e.getKey().toString()+"="+e.getValue().toString()+"}"); System.setProperty(e.getKey().toString(), e.getValue().toString()); } System.out.println(System.getProperty("username")); } catch (Exception e) { e.printStackTrace(); } }

}