如何从JTextField中用户键盘输入中过滤非法/禁止的文件名字符？
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我想过滤用户的键盘输入中JTextField中非法/禁止的文件名字符。我已经在JTextField中设置了大写过滤器。
DocumentFilter dfilter = new UpcaseFilter();
JTextField codeTF = new JTextField();
((AbstractDocument) codeTF.getDocument()).setDocumentFilter(dfilter);
class UpcaseFilter extends DocumentFilter
{
public void insertString (DocumentFilter.FilterBypass fb, int offset, String text, AttributeSet attr) throws BadLocationException
{
fb.insertString (offset, text.toUpperCase(), attr);
}
public void replace (DocumentFilter.FilterBypass fb, int offset, int length, String text, AttributeSet attr) throws BadLocationException
{
fb.replace(offset, length, text.toUpperCase(), attr);
}
}
没有找到相关结果
已邀请:
4 个回复
蓄荣糖些
class FileNameFilter extends DocumentFilter { public void insertString (DocumentFilter.FilterBypass fb, int offset, String text, AttributeSet attr) throws BadLocationException { fb.insertString (offset, fixText(text), attr); } public void replace (DocumentFilter.FilterBypass fb, int offset, int length, String text, AttributeSet attr) throws BadLocationException { fb.replace(offset, length, fixText(text), attr); } private String fixText(String s) { StringBuilder sb = new StringBuilder(); for(int i = 0; i < s.lenght(); ++i) { if(isLegalFileNameChar(s.charAt(i)) sb.append(s.charAt(i)); } return sb.toString(); } private boolean isLegalFileNameChar(char c) { // Your logic goes here ... } }氮顺
-在此处和此处查看 格式化的文本字段为开发人员提供了一种方法，可以指定可以在文本字段中键入的有效字符集冕偷淮款
这是FileNameFilter，它阻止插入非法字符。这应该可以在Unix，Windows和Mac OS中使用。class FileNameFilter extends DocumentFilter { private static final char[] ILLEGAL_CHARACTERS = {\'/\', \'\\n\', \'\\r\', \'\\t\', \'\\0\', \'\\f\', \'`\', \'?\', \'*\', \'\\\\\', \'<\', \'>\', \'|\', \'\\\"\', \':\', \'.\'}; public void insertString (DocumentFilter.FilterBypass fb, int offset, String text, AttributeSet attr) throws BadLocationException { fb.insertString (offset, fixText(text).toUpperCase(), attr); } public void replace (DocumentFilter.FilterBypass fb, int offset, int length, String text, AttributeSet attr) throws BadLocationException { fb.replace(offset, length, fixText(text).toUpperCase(), attr); } private String fixText (String s) { StringBuilder sb = new StringBuilder(); for(int i = 0; i < s.length(); ++i) { if (!isIllegalFileNameChar (s.charAt (i))) sb.append (s.charAt (i)); } return sb.toString(); } private boolean isIllegalFileNameChar (char c) { boolean isIllegal = false; for (int i = 0; i < ILLEGAL_CHARACTERS.length; i++) { if (c == ILLEGAL_CHARACTERS[i]) isIllegal = true; } return isIllegal; } }田损比报
与很好地互补。