正则表达式在各种语言或工具中使用-优快云博客

本文链接：https://blog.youkuaiyun.com/u013165852/article/details/108651484

本文详细介绍了如何在Python、Java、SQL、Shell及文本编辑器vi中使用正则表达式来查找和处理特定模式的数据。从不同编程语言的语法差异到实际代码示例，全面展示了正则表达式的强大功能。

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1.python中使用

"""
@author :Eric-chen
@contact :sygcrjgx@163.com
@time :2020/8/13 17:43
@desc :
"""
import re

# pattern=re.compile("^.*(ods_ogg_erp_cd[\w-]{1,1000}).*$")
pattern=re.compile("ods_ogg_erp_cd[\w-]{1,1000}")

with open('F:\python\codes\pythonLearn\mappingScript_erp_cd_e5_26.xml', 'r',encoding='utf8') as f:
    line=f.readline()
    while line:
        m=pattern.findall(line)
        if m:
            print(m)
        line=f.readline()

2.java中使用　

package com;

import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class test {
    public static void main(String[] args) throws IOException {
        Pattern pattern = Pattern.compile("ods_ogg_erp_cd[\\w-]{1,1000}");
        String path = "F:\\python\\codes\\pythonLearn\\mappingScript_erp_cd_e5_26.xml";
        File file = new File(path);
        List<String> stringList = FileUtils.readLines(file, "utf-8");
        for (String line : stringList) {
            Matcher matcher = pattern.matcher(line);
            if (matcher.find())
                System.out.println(matcher.group(0));
        }
    }
}

3.Sql中使用

create table t_0814 (col1 varchar2(10));
insert into t_0814 values ('aaa');
insert into t_0814 values ('aaa');
insert into t_0814 values ('aaa');
insert into t_0814 values ('aaa');
insert into t_0814 values ('BBB');

select * from t_0814 where regexp_like(col1,'[a-z]');

4.shell命令

#!/bin/bash
grep "ods_ogg_erp_cd\w\{1,1000\}" /root/mappingScript_erp_cd_e3_09.xml >>tmp.txt
let i=0
while read line
do
  line=${line#*>}
  echo ${line%<*}
  let i=i+1
done <tmp.txt
rm -rf tmp.txt

echo "$i"