Question

我在JS中有以下功能：

var startDate = stringToDate('12/01/2016','mm/dd/yyyy','/');
var endDate = stringToDate('01/01/2017','mm/dd/yyyy','/');


function compareDate(_date) {

  var val1 = ( startDate <= _date)
  var val2 = ( endDate >= _date )
  var val = val1 && val2

  log('--------')
  log(_date)
  log(startDate)
  log(endDate)
  log(val1)
  log(val2)
  log(val)
  log('--------')
  return val
}

日志

[17-02-10 13：25：14：145 EET] 2016年12月2日星期五00:00:00 GMT + 0200（EET）

[17-02-10 13：25：14：146 EET] Thu Dec 01 00:00:00 GMT + 02：00 2016

[17-02-10 13：25：14：147 EET] Sun Jan 01 00:00:00 GMT + 02：00 2017

[17-02-10 13：25：14：147 EET] false

[17-02-10 13：25：14：148 EET] false

[17-02-10 13：25：14：149 EET] --------

[17-02-10 13：25：14：150 EET] 2016年12月3日星期六00:00:00 GMT + 0200（EET）

[17-02-10 13：25：14：150 EET] Thu Dec 01 00:00:00 GMT + 02：00 2016

[17-02-10 13：25：14：151 EET] Sun Jan 01 00:00:00 GMT + 02：00 2017

[17-02-10 13：25：14：151 EET] false

[17-02-10 13：25：14：152 EET] false

[17-02-10 13：25：14：152 EET] --------

[17-02-10 13：25：14：153 EET] --------

[17-02-10 13：25：14：153 EET] Sun Dec 04 2016 00:00:00 GMT + 0200（EET）

[17-02-10 13：25：14：154 EET] Thu Dec 01 00:00:00 GMT + 02：00 2016

[17-02-10 13：25：14：154 EET] Sun Jan 01 00:00:00 GMT + 02：00 2017

[17-02-10 13：25：14：155 EET] false

[17-02-10 13：25：14：156 EET] false

正如您在第一个日志Dec 02中看到的那样，Dec 01大于public class MainActivity extends AppCompatActivity { TextView infoIp, infoPort; static final int SocketServerPORT = 8080; ServerSocket serverSocket; ServerSocketThread serverSocketThread; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); infoIp = (TextView) findViewById(R.id.infoip); infoPort = (TextView) findViewById(R.id.infoport); infoIp.setText(getIpAddress()); serverSocketThread = new ServerSocketThread(); serverSocketThread.start(); } @Override protected void onDestroy() { super.onDestroy(); if (serverSocket != null) { try { serverSocket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } private String getIpAddress() { String ip = ""; try { Enumeration<NetworkInterface> enumNetworkInterfaces = NetworkInterface .getNetworkInterfaces(); while (enumNetworkInterfaces.hasMoreElements()) { NetworkInterface networkInterface = enumNetworkInterfaces .nextElement(); Enumeration<InetAddress> enumInetAddress = networkInterface .getInetAddresses(); while (enumInetAddress.hasMoreElements()) { InetAddress inetAddress = enumInetAddress.nextElement(); if (inetAddress.isSiteLocalAddress()) { ip += "SiteLocalAddress: " + inetAddress.getHostAddress() + "\n"; } } } } catch (SocketException e) { // TODO Auto-generated catch block e.printStackTrace(); ip += "Something Wrong! " + e.toString() + "\n"; } return ip; } public class ServerSocketThread extends Thread { @Override public void run() { Socket socket = null; try { serverSocket = new ServerSocket(SocketServerPORT); MainActivity.this.runOnUiThread(new Runnable() { @Override public void run() { infoPort.setText("I'm waiting here: " + serverSocket.getLocalPort()); }}); while (true) { socket = serverSocket.accept(); FileTxThread fileTxThread = new FileTxThread(socket); fileTxThread.start(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { if (socket != null) { try { socket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } } public class FileTxThread extends Thread { Socket socket; FileTxThread(Socket socket){ this.socket= socket; } @Override public void run() { File file = new File( Environment.getExternalStorageDirectory(), "graphs.txt"); byte[] bytes = new byte[(int) file.length()]; BufferedInputStream bis; try { bis = new BufferedInputStream(new FileInputStream(file)); bis.read(bytes, 0, bytes.length); OutputStream os = socket.getOutputStream(); os.write(bytes, 0, bytes.length); os.flush(); socket.close(); final String sentMsg = "File sent to: " + socket.getInetAddress(); MainActivity.this.runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(MainActivity.this, sentMsg, Toast.LENGTH_LONG).show(); }}); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { try { socket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } }，但我得到了假等等......

Answer 1

您的问题中缺少一些代码，但我添加了我的版本 - ＆gt;将字符串日期更改为格式为yyyymmdd的整数，并比较>=＆amp;的整数<=（因为字符串比较可能是错误的）：

function stringToDateInt(_date, _format, _sep)
{
  var aDate = _date  .split(_sep);
  var aForm = _format.split(_sep);
  //console.log(aDate);
  //console.log(aForm);
  var oDate = {};
  for(var i = 0, length = aDate.length; i < length; i++)
  {
    oDate[aForm[i]] = aDate[i];
  }
  //console.log(oDate);
  return (oDate.yyyy + oDate.mm + oDate.dd) * 1;
}

var startDate = stringToDateInt('12/01/2016','mm/dd/yyyy','/');
var endDate   = stringToDateInt('01/01/2017','mm/dd/yyyy','/');

function compareDate(_date)
{
  var iDate = stringToDateInt(_date,'mm/dd/yyyy','/');
  var val1 = ( startDate <= iDate);
  var val2 = ( endDate >= iDate );
  var val = val1 && val2;

  console.log('--------')
  console.log(_date, '->', iDate);
  console.log(startDate)
  console.log(endDate)
  console.log('Date Bigger than or equal startDate:', val1)
  console.log('Date Less than or equal endDate:', val2)
  console.log('Date between start and end dates:', val)
  console.log('--------')
  return val
}

compareDate('12/02/2016');

compareDate('01/01/2015');

compareDate('11/11/2017');

或者日期版本更接近你正在做的事情：

function stringToDate(_date, _format, _sep)
{
  var aDate = _date  .split(_sep);
  var aForm = _format.split(_sep);
  //console.log(aDate);
  //console.log(aForm);
  var oDate = {};
  for(var i = 0, length = aDate.length; i < length; i++)
  {
    oDate[aForm[i]] = aDate[i];
  }
  //console.log(oDate);
  //return (oDate.yyyy + oDate.mm + oDate.dd) * 1;
  return new Date(oDate.yyyy, (oDate.mm * 1 - 1), oDate.dd);
}

var startDate = stringToDate('12/01/2016','mm/dd/yyyy','/');
var endDate   = stringToDate('01/01/2017','mm/dd/yyyy','/');

function compareDate(_date)
{
  var val1 = ( startDate <= _date);
  var val2 = ( endDate >= _date );
  var val = val1 && val2;

  console.log('--------')
  console.log(_date, '->', _date);
  console.log(startDate)
  console.log(endDate)
  console.log('Date Bigger than or equal startDate:', val1)
  console.log('Date Less than or equal endDate:', val2)
  console.log('Date between start and end dates:', val)
  console.log('--------')
  return val
}

compareDate(stringToDate('12/02/2016','mm/dd/yyyy','/'));

compareDate(stringToDate('01/01/2015','mm/dd/yyyy','/'));

compareDate(stringToDate('11/11/2017','mm/dd/yyyy','/'));

Javascript比较日期始终为false

1 个答案: