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import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.Properties; public class Test5 { public static void main(String[] args) throws Exception { getAppCount(); } private static void getAppCount() throws Exception { File file = new File("C:\\Users\\Administrator\\Desktop\\测试文件夹","b.txt"); if(!file.exists()) file.createNewFile(); FileInputStream fis = new FileInputStream(file); Properties pro = new Properties(); pro.load(fis); String value = pro.getProperty("name"); int count = 0; if(value!=null) { count = Integer.parseInt(value); if(count>=5) { throw new RuntimeException("使用次数已到"); } } count++; pro.setProperty("name", count+""); FileOutputStream fos = new FileOutputStream(file); pro.store(fos, ""); fos.close(); fis.close(); } }
黑马程序员——java——获取一个应用程序运行的次数,如果超过5次,给出使用次数已到请注册的提示,并不要再运行程序
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原文地址:http://blog.csdn.net/zl18603543572/article/details/46626059