Java--正则表达式
2021-06-09 06:03
标签：reg arch user search hone 种类 except exce int 第一种 类似于python的re.search("\d+","123") 第二种类似于python的pattern,search,group 这种方式和python一样，适用于需要重复匹配，效率高 关于文件读取的操作：https://blog.csdn.net/weixin_43139592/article/details/105283446 Java--正则表达式 标签：reg arch user search hone 种类 except exce int 原文地址：https://www.cnblogs.com/shunguo/p/14496343.htmlimport java.io.*;
import java.util.*;
import java.util.regex.*;
public class test {
public static void readFile() throws IOException {
//类似于
File f = new File("C:\\Users\\15773\\Desktop\\简历投递\\新建文本文档.txt");
FileReader reader = new FileReader(f);
BufferedReader br = new BufferedReader(reader);
//按行读取
String line;
String regex="\\d+";
while ((line = br.readLine()) != null){
// System.out.println(line);
if (line.matches(regex)){//类似于re.search(pattern,string)
System.out.println(line+":matching regex");
}else {
System.out.println(line+":not matching regex");
}
}
br.close();
}
public static void main(String[] args) throws IOException{
test.readFile();
}
}
import java.io.*;
import java.util.*;
import java.util.regex.*;
public class test {
public static void readFile() throws IOException {
//第一步确定pattern
Pattern pattern = Pattern.compile("(\\d+)");
//第二部进行匹配
Matcher matcher = pattern.matcher("phone number is 123445");
if (matcher.find()){
System.out.println("匹配到了 "+ matcher.group(0));
}else{
System.out.println("没有匹配到");
}
}
public static void main(String[] args) throws IOException{
test.readFile();
}
}