格式化文本框失去根據病情

Question

這是我需要的：一個文本框，其中用戶可以輸入：

1234567890或11234567890

，它需要進行相應的格式化爲

123 -456-7890或1 123-456-7890

本質上是一個電話號碼，有或沒有國家代碼。到目前爲止，我有以下操作的代碼：

if (isPhone && !getText().equals(BLANK_STRING)) { 
     int phoneLength = getText().replaceAll("[^0-9]", "").length(); 
     String text = getText().replaceAll("[^0-9]", ""); 
//We call the method to format the entered text after we left the field 
     setPhoneFormatMask(phoneLength, text); 
} 

---

private void setPhoneFormatMask(int length, String text) { 
    System.out.println("length = " + length); 
    System.out.println("text = " + text); 
    switch (length) { 
     case 10: 
      try { 
       System.out.println("Setting mask"); 
       numberMaskFormat.setMask("###-###-####"); 
      } catch (ParseException ex) { 
       Logger.getLogger(WWNumericFormattedTextField.class.getName()).log(Level.SEVERE, null, ex); 
      } 
      break; 
     case 11: 
      try { 
       System.out.println("setting mask 2"); 
       numberMaskFormat.setMask("# ###-###-####"); 
      } catch (ParseException ex) { 
       Logger.getLogger(WWNumericFormattedTextField.class.getName()).log(Level.SEVERE, null, ex); 
      } 
      break; 
    } 
    setFormatter(numberMaskFormat); 
    System.out.println("n:" + numberMaskFormat.getMask()); 
    setText(text); 
} 

@Override 
public void focusGained(FocusEvent e) { 
    if (isPhone) { 
     try { 
      numberMaskFormat.setMask("**************"); 
     } catch (ParseException ex) { 
      Logger.getLogger(WWFormattedTextField.class.getName()).log(Level.SEVERE, null, ex); 
     } 
     setFormatter(numberMaskFormat); 
    } 
} 

控制檯輸出：

//Application launched 
focus gained 
n2:************** 
//I entered 9051234567 and tabbed out 
Focus lost 
length = 10 
text = 9051234657 
Setting mask 
n:###-###-#### 
Formatted text = - -  
//Tabbed back in 
focus gained 
n2:************** 
//Entered 19051234567 and tabbed out 
Focus lost 
length = 11 
text = 19051234567 
setting mask 2 
n:# ###-###-#### 
Formatted text = 

我需要就如何在JFormattedTextField中格式化文本/幫助/指南焦點丟失後，格式會根據輸入的位數而變化。

Answer 1

首先，使用面膜：#任何有效數字，使用Character.isDigit因爲*適用於任何字符。

二，使用DefaultFormatterFactory而設置格式化到JFormattedTextFeild：

ftf.setFormatterFactory(new DefaultFormatterFactory(
               new MaskFormatter("######"))); 

ftf是JFormattedTextFeild。嘗試將input verifier分配給formatted text field以檢查並驗證焦點丟失事件上的文本。 InputVarifier將調用功能boolean shouldYieldFocus(JComponent input)焦點丟失事件來檢查它應該失去焦點。我寫了一個樣本例如一個給你，你可以很容易地通過它來滿足你的需要：

class myInputVarifier extends InputVerifier 
{ 
    public boolean maskChanged = false; 
    MaskFormatter maskFormatter ; 
    JFormattedTextField ftf; 
    @Override 
    public boolean verify(JComponent input) { 
    if (input instanceof JFormattedTextField) { 
      ftf = (JFormattedTextField)input; 
      maskFormatter = (MaskFormatter) ftf.getFormatter(); 
      ; 
      if(!isValid()) return false; 
          // check with mask ###### first, if valid change the mask 
          // to # ##-### and reset the text 

      if(!maskChanged) 
      { 
       try { 
        String text = ftf.getText(); 
          // get the text formatted as ###### = 112123 
        maskFormatter.setMask("# ##-###"); 
        ftf.setFormatterFactory(
              new DefaultFormatterFactory(maskFormatter)); 
        ftf.setText(text); 
          //resetting the text will be formatted as # ##-### = 1 12-123 
        maskChanged = true; 
       } catch (ParseException ex) { 
        } 

       return isValid(); 
      } 


      } 
      return true; 
    } 

    public boolean isValid() 
    { 
     try { 
      maskFormatter.stringToValue(ftf.getText()); 
      return true; 
     } catch (ParseException pe) { 
      return false; 
      } 
    } 

    @Override 
    public boolean shouldYieldFocus(JComponent input) { 
    return verify(input); 
    } 
}