Properties学习及文件运行次数计数

最新推荐文章于 2022-11-05 11:25:03 发布

lf820820

最新推荐文章于 2022-11-05 11:25:03 发布

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CC 4.0 BY-SA版权

文章标签： properties file string class null thread

本文链接：https://blog.youkuaiyun.com/lf820820/article/details/7506798

本文介绍如何使用Java的Properties类实现对文件运行次数的计数，并在每次运行后更新计数值。

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Properties学习及文件运行次数计数:

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Properties;

public class PropertiesStudy {
	public static void main(String[] args) {
		new Thread(new PropertiesClass()).start();
	}
}

class PropertiesClass implements Runnable{
	@Override
	public void run() {
		int count = 0;
		BufferedWriter bufferedWriter = null;
		BufferedReader bufferedReader = null;
		FileWriter fileWriter = null;
		FileReader fileReader = null;
		File file = null;
		Properties properties = new Properties();
		try {		
			file = new File("F:\\JavaStudyProcess\\javaFileTest\\run.properties");
			if (file.exists()) {
				fileReader = new FileReader(file);
				bufferedReader = new BufferedReader(fileReader);
				properties.load(fileReader);
				String countString = properties.getProperty("count");
				count = Integer.parseInt(countString);
			}		
			count++;
			properties.setProperty("count", count+"");
			fileWriter = new FileWriter(file);
			bufferedWriter = new BufferedWriter(fileWriter);
			properties.store(bufferedWriter, "程序运行计数器");
			if (count >= 5) {
				System.out.println("试用期已过，请购买正版软件！");
				return;
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				
				if(bufferedReader != null){
					bufferedReader.close();
				}		
			} catch (IOException e2) {
				e2.printStackTrace();
			}
			try {
				System.out.println("!!!!!!!!!!!!!!!!!!!!!!!!");
				if (bufferedWriter != null) {
					bufferedWriter.close();
				}	
			} catch (IOException e2) {
				e2.printStackTrace();
			}
		}
	}
}