package org.jimmy.autosearch20180821.test;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class TestRegularExpression {
public static void main(String[] args) {
//2位数字直接匹配,3位或3位以上的数字直接匹配末尾两位数字
Pattern pattern = Pattern.compile("\\d{2}(?!\\d+)");
Matcher matcher = pattern.matcher("145423gdf4525243g89dgf56gxdfd123gxf4562gxd2357xgdf12gdsf36");
while(matcher.find()){
System.out.print(matcher.group() + " ");
}
System.out.println();
//这个在之前基础上过滤掉了前面的数字(3位或3位以上的数字不会匹配,只会匹配2位数的数字)
pattern = Pattern.compile("(?<!\\d+)\\d{2}(?!\\d+)");
matcher = pattern.matcher("145423gdf4525243g89dgf56gxdfd123gxf4562gxd2357xgdf12gdsf36");
while(matcher.find()){
System.out.print(matcher.group() + " ");
}
}
}
直接上代码了,这次使用了?!和?<!来匹配正则表达式.
下图是运行结果.