共5次每隔2秒检查指定文件是否存在 读取并强制删除

package cn.wangy.io;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

public class IOTest {
	private String path = "d:/temp/aa";
	private inttimes = 5;
	private String content = "";

	public String doTrade() {
		while (times> 0) {
			try {
				Thread.sleep(2000);
			} catch(InterruptedException e) {
				e.printStackTrace();
			}
			
			if(checkFile()) {
				readFileContent();
				times =-1;
			} else{
				times--;
			}
		}
		return content;
	}

	/**
	* 检查rev文件夹中 文件是否存在
	*
	* @return
	*/
	public boolean checkFile() {
		File file =new File(path);
		if(file.exists()) {
			System.out.println("exist");
			return true;
		}
		System.out.println("no exist");
		return false;
	}

	/**
	* 读取文件内容 然后存入content 删除文件
	*/
	public void readFileContent() {
		File file =new File(path);
		BufferedReader reader = null;
		try {
			reader = newBufferedReader(new FileReader(file));
			String line= "";
			while ((line= reader.readLine()) != null) {
				content +=line + "\n";
			}
			//reader.close(); 不关闭流 使file.delete()==false
			delFile();
		} catch(FileNotFoundException e) {
			e.printStackTrace();
		} catch(IOException e) {
			e.printStackTrace();
		}
	}

	/**
	* 调用运行环境 强制删除文件
	*/
	public void delFile() {
		Runtime rTime = Runtime.getRuntime();
		String str ="cmd /c del " + path;
		try {
			rTime.exec(str);
		} catch(IOException e) {
			e.printStackTrace();
		}
	}
}

 

package cn.wangy.io;

public class Main {

	public static void main(String[] args) {
		String content = new IOTest().doTrade();
		System.out.println(content);
	}
}