import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "(?<!^)((?<=[a-z])[A-Z0-9]|[A-Z](?=[a-z]))";
final String string = "Situacao\",\n"
+ "PES_TIPO_PESSOA\",\n"
+ "CedenteCnpjCpf\",\n"
+ "TIT_CEDENTE_ENT_CODIGO\",\n"
+ "CedenteNome\",\n"
+ "Cnae\",\n"
+ "SecaoCNAEDescricao\",\n"
+ "NotaPdd\",\n"
+ "SAC_TIPO_PESSOA\",\n"
+ "SacadoCnpjCpf\",\n"
+ "SacadoNome\",\n"
+ "IdTituloVortx\",\n"
+ "TipoAtivo\",\n"
+ "DataEmissao\",\n"
+ "DataAquisicao\",\n"
+ "DataVencimento\",\n"
+ "NumeroBoleto\",\n"
+ "NumeroTitulo\",\n"
+ "CampoChave\",\n"
+ "ValorAquisicao\",\n"
+ "ValorNominal\",\n"
+ "ValorPresente\",\n"
+ "PDDNota\",\n"
+ "PDDVencido\",\n"
+ "PagamentoParcial\",\n"
+ "Coobricacao\",\n"
+ "DataGeracao\",\n"
+ "PDDTotal\",\n"
+ "CampoAdicional1\",\n"
+ "CampoAdicional2\",\n"
+ "CampoAdicional3\",\n"
+ "CampoAdicional4\",\n"
+ "CampoAdicional5,\n"
+ "Campo22Adicional5\n"
+ "camelCase";
final String subst = "_\\1";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);
// The substituted value will be contained in the result variable
final String result = matcher.replaceAll(subst);
System.out.println("Substitution result: " + result);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html