In recent text parsing process need to extract the text within the date format and specification, commonly used format for "yyyy - MM - dd,"
Due to different writing, can't use the Date function or SimpleDateFormat function format, so their implements a method,
After test all with the date of the separator can accurately extract, now do not know whether perfect, the code is as follows:

//single digits in regular 
The static Pattern month=Pattern.com running (" (? <(d=-) \ \?=-) "); 
//single-digit number day/regular 
The static Pattern running day=Pattern.com (" (? <=-) \ \ d $"); 
Public static String formatDate (String sourceDate) {
SourceDate=sourceDate. ReplaceAll (" years../- ", "-") 
ReplaceAll (" [number] $", "") 
ReplaceAll (" crossed zero OOo0 [], "" 0") 
Replace (" a ", "1") 
Replace (" 2 ", "2") 
Replace (" three ", "3") 
Replace (" four ", "4") 
Replace (" five ", "5") 
Replace (" six ", "6") 
Replace (" seven ", "7") 
Replace (" eight "and" 8 ") 
Replace (" nine ", "9") 
Replace (" 22 ", "2"); 
//October 10 to 10 
SourceDate=sourceDate. ReplaceAll (" (? //convert the ten dozen 1 
SourceDate=sourceDate. ReplaceAll (" (? //the whole converting of ten 0 
SourceDate=sourceDate. ReplaceAll (" (? <=) 10 $\ \ d ", "0"); 
//dozens of several ten delete 
SourceDate=sourceDate. ReplaceAll (" (? <=\ \ d) 10 (?=\ \ d) ", ""); 
//in single digits adding 0 
The Matcher Matcher=month. The Matcher (sourceDate); 
If (the matcher. The find ()) {
SourceDate=sourceDate. Substring (0, the matcher. Start ()) + "0" + sourceDate substring (matcher. Start ()); 
} 
//single-digit date adding 0 
The matcher=day.to matcher (sourceDate); 
If (the matcher. The find ()) {
SourceDate=sourceDate. Substring (0, the matcher. Start ()) + "0" + sourceDate substring (matcher. Start ()); 
} 
Return sourceDate; 
}