读propert文件

PropertiesUtil.java

package utils;

import java.io.BufferedInputStream;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.util.Properties;

public class PropertiesUtil {

    private static InputStream in;//=prop.class.getClassLoader().getResourceAsStream("resource/date.properties");

    private static Properties props;

    private static String filePath=PropertiesUtil.class.getClassLoader().getResource("resource/date.properties").getFile();//.getPath();

    static{

        props=new Properties();

            try {

                in=new BufferedInputStream(new FileInputStream(filePath));

                props.load(in);

            } catch (FileNotFoundException e1) {

                e1.printStackTrace();

            }catch (IOException e) {

                e.printStackTrace();

            }

    }

    public static String readStringValue(String key) {

        return props.getProperty(key);

    }

    public static int readIntValue(String key) {

        return Integer.valueOf(props.getProperty(key));

    }

    public static Float readFloatValue(String key) {

        return Float.valueOf(props.getProperty(key));

    }

    public static String[] readStringArray(String key,String regex) {

        return props.getProperty(key).split(regex);

    }

    /**

     * @param args

     */

    public static void main(String[] args) {

        System.out.println(PropertiesUtil.readStringValue("aa"));

        System.out.println(PropertiesUtil.readIntValue("age"));

        System.out.println(PropertiesUtil.readFloatValue("fl"));

        System.out.println(PropertiesUtil.readStringArray("aa",",")[1]);

    }

}

date.properties

#用来测试的

aa=1,2,3,4,54,54,5,43,5,32,3,4532,45

age=1
fl=1.1

public static boolean isNumeric(String str){
        Pattern pattern = Pattern.compile("[0-9]*");
        return pattern.matcher(str).matches();   
     }

String.format("%03d",Integer.valueOf(no2)+1);