java获取文件创建和修改时间

(2013-11-27 14:06:31)

标签：

创建时间

修改时间

java

package com.xian.home2;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import java.util.List;

public class FileOperate {

public static void main(String[] args) {

// FileOperate fo = new FileOperate();

// String filepath = "G:\\02";

// fo.getFileList(filepath);

getCreateTime();

}

public List getFileList(String filepath) {

try {

File file = new File(filepath);

if (file.isDirectory()) {

String[] filelist = file.list();

for (int i = 0; i < filelist.length; i++) {

File Ifile = new File(filepath + "\\" + filelist[i]);

FileInputStream fis = new FileInputStream(Ifile);

long modifiedTime = Ifile.lastModified();

Date date=new Date(modifiedTime);

SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:MM");

String dd=sdf.format(date);

System.out.println("File name:" + Ifile.getName()

+ " \tFile size: "

+ (double) ((double) fis.available() / 1024 / 1024)

+ "M"+ " \tFile create Time: "+dd);

}

}

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

return null;

}

public static void getCreateTime(){

String filePath = "G:\\02\\123.txt";

String strTime = null;

try {

Process p = Runtime.getRuntime().exec("cmd /C dir "

+ filePath

+ "/tc" );

InputStream is = p.getInputStream();

BufferedReader br = new BufferedReader(new InputStreamReader(is));

String line;

while((line = br.readLine()) != null){

if(line.endsWith(".txt")){

strTime = line.substring(0,17);

break;

}

}

} catch (IOException e) {

e.printStackTrace();

}

System.out.println("创建时间 " + strTime);

//输出：创建时间 2009-08-17 10:21

}

@SuppressWarnings("deprecation")

public static void getModifiedTime_1(){

File f = new File("C:\\test.txt");

Calendar cal = Calendar.getInstance();

long time = f.lastModified();

cal.setTimeInMillis(time);

//此处toLocalString()方法是不推荐的，但是仍可输出

System.out.println("修改时间[1] " + cal.getTime().toLocaleString());

//输出：修改时间[1] 2009-8-17 10:32:38

}

public static void getModifiedTime_2(){

File f = new File("C:\\test.txt");

Calendar cal = Calendar.getInstance();

long time = f.lastModified();

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

cal.setTimeInMillis(time);

System.out.println("修改时间[2] " + formatter.format(cal.getTime()));

//输出：修改时间[2] 2009-08-17 10:32:38

}

}

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