[英]Format string with MaskFormatter throws “Invalid character” exception
I have a function in which I need to set a string to the following format: #####-####-## and padded with leading zeroes.我有一个 function ,我需要将字符串设置为以下格式:#####-####-## 并用前导零填充。
eg:例如:
1234567
will become 00001-2345-67
1234567
将变为00001-2345-67
98765432109
will become 98765-4321-09
98765432109
将变为98765-4321-09
I'm using MaskFormatter and my impression from the documentation was that A
represented any letter or digit, and that setPlaceHolderCharacter
would pad the string.我正在使用MaskFormatter ,我对文档的印象是A
代表任何字母或数字,而setPlaceHolderCharacter
将填充字符串。
I know technically it's for use with text fields but had hoped I could use it in a back-end function, if not is there a different component i should be using?我知道从技术上讲它是用于文本字段的,但我希望我可以在后端 function 中使用它,如果没有,我应该使用不同的组件吗?
I have this code below but it throws an exception java.text.ParseException: Invalid character: 1
when it hits mask.valueToString(ndc)
我在下面有这段代码,但它抛出异常java.text.ParseException: Invalid character: 1
when it hit mask.valueToString(ndc)
public class NdcFormatter implements MapFunction<Purchase, Purchase> {
private final String maskFormat = "AAAAA-AAAA-AA";
private final Character placeholder = '0';
@Override
public Purchase map(Purchase purchase) throws ParseException {
if(purchase != null){
String ndc = purchase.getNdc();
MaskFormatter mask = new MaskFormatter(maskFormat);
mask.setPlaceholderCharacter(placeholder);
String result = mask.valueToString(ndc);
purchase.setNdc(result);
}
return purchase;
}
}
Here is how to fix ERROR java.text.ParseException: Invalid character: ...
in MaskFormatter
以下是如何修复错误java.text.ParseException: Invalid character: ...
in MaskFormatter
Solution the error is in valueToString
method, you have to add this line of code:解决方法错误在valueToString
方法中,你必须添加这行代码:
mask.setValueContainsLiteralCharacters(false);
but you will get a problem like that:但你会遇到这样的问题:
1234567
it will return you 12345-6700-00
当您设置1234567
时,它将返回您12345-6700-00
00001-2345-67
you have to pass 00001234567
要获得00001-2345-67
,您必须通过00001234567
so you have to fix your input value before formatting.所以你必须在格式化之前修复你的输入值。
here is the complete code:这是完整的代码:
public class NdcFormatter implements MapFunction<Purchase, Purchase> {
private final String maskFormat = "AAAAA-AAAA-AA";
private final Character placeholder = '0';
@Override
public Purchase map(Purchase purchase) throws ParseException {
if(purchase != null){
String ndc = purchase.getNdc();
MaskFormatter mask = new MaskFormatter(maskFormat);
mask.setPlaceholderCharacter(placeholder);
mask.setValueContainsLiteralCharacters(false);
String result = mask.valueToString(ndc);
purchase.setNdc(result);
}
return purchase;
}
}
to pad the leading zeroes by yourself here is a simple code example.自己填充前导零是一个简单的代码示例。
if(ndc.length() < maskFormat.length()) {
String pad = "0";
for(int i = 0; i < maskFormat.length() -ndc.length() - 3; i++ ) {
pad = pad + "0" ;
}
ndc = pad + ndc;
}
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