使用次数配置信息练习Properties

package FileDemo;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Properties;

public class FileDemo {

    public static void main(String[] args) throws IOException {
        method_2();
    }
    //使用次数配置信息练习
    public static void method_2() throws IOException {
        File confile=new File("a.txt");
        if(!confile.exists())
        {
            confile.createNewFile();
        }
        FileInputStream fis=new FileInputStream(confile);
        Properties prop=new Properties();
        prop.load(fis);
        String value=prop.getProperty("time");
        int count=0;
        if(value!=null){
                count=Integer.parseInt(value);
                if(count>=5){
/*                    System.out.println("使用次数已到，给钱");
                    return;*/
                    throw new RuntimeException("使用次数已到，给钱");
                }
        }
        count++;
        prop.setProperty("time", count+"");
        FileOutputStream fos=new FileOutputStream(confile);
        prop.store(fos, "");
        prop.list(System.out);
        fis.close();
        fos.close();
    }
    public static void method_1() throws IOException
    {
        File file=new File("a.txt");
        if(!file.exists())
        {
            file.createNewFile();
        }
        FileReader fr=new FileReader("a.txt");
        Properties prop=new Properties();
        prop.load(fr);
        prop.setProperty("wangwu", "12");
        FileWriter fw=new FileWriter(file);
        prop.store(fw, "");
        prop.list(System.out);
        fr.close();
    }
}