符号 | 含义 |
---|---|
. | 代表除换行符外的任意字符 |
* | 代表匹配零次或者多次 |
+ | 表示匹配一次到多次 |
? | 其左边的字符被匹配0次或者1次 |
() | 影响表达式匹配的顺序(类似C++的小括号会影响表达式运算顺序),并且用作表达式的分组标记(标记从1开始)如:([a-z]bc)smn\1匹配“tbcsmntbc” |
{} | 指定前面的字符或分组的出现次数 |
[] | 匹配列表中任意单个字符。如:[ab]匹配“a”或“b”;[0-9]匹配任意单个数字 |
[^] | 匹配列表之外的任意单个字符 |
\ | 转义字符 如:要使用 “\” 本身, 则应该使用\\ |
\d | 单个数字 |
| | 匹配表达式左边和右边的字符串。如:ab|bc匹配“ab”或“bc” |
\d | 匹配一个数字字符。等价于:[0-9] |
\D | \d取反,匹配一个非数字字符。等价于:[^0-9] |
\s | 匹配任意单个空白字符:包括空格、制表符等(注:不包括换车符和换行符)。等价于:[ \t] |
\S | \s取反的任意单个字符。 |
\w | 匹配包括下划线的任意单个字符。等价于:[A-Za-z0-9_] |
\W | \w取反的任意单个字符。等价于:[^A-Za-z0-9_] |
\b | 匹配单词起始处或结尾处 如:\bin匹配int,但不匹配sing |
^ | 其右边的表达式被匹配在行首。如:^A匹配以“A”开头的行 |
$ | 其左边的表达式被匹配在行尾。如:e$匹配以“e”结尾的行 |
\t | Tab制表符 注:扩展和正则表达式都支持 |
\r | 回车符CR 注:扩展支持,正则表达式不支持 |
\n | 换行符LF 注:扩展支持,正则表达式不支持 |
Note: 以换行符结尾表示是$\r\n,而不是\r\n$
^ --> 代表开头
.* --> 相当于like '%',任意字符
$ --> 代表结尾
#时间戳示例
2022-12-21 14:22:24.123456
#表达式
\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d+
#原始字符串
<program sector_size_in_bytes="512" filename="" label="fsg" num_partition_sectors="4096">
<program sector_size_in_bytes="512" filename="" label="dsg" num_partition_sectors="4096">
<program sector_size_in_bytes="512" filename="1.txt" label="dsg" num_partition_sectors="4096">
#提取部分
filename="" label="fsg"
filename="" label="dsg"
filename="1.txt" label="dsg"
#查找目标:
.*(filename.*label\=\"[^ ]*).*
#替换为:
\1
#不查找filename为空的字符串
也就是说不匹配""这样的字符串,但是[^]这种表达式只能匹配单独字符,如果写了字符串,也会把字符串拆开单独匹配。那么如何匹配非某字符串这种形式呢?答案是零宽负向先行断言(?!pattern) 或者零宽负向后行断言(?<!pattern)
#查找目标:
#这里注意一下,(?!"")后面要加.*,代表.*中不匹配""。
filename=(?!"").* label=[^ ]*
#替换为:
\1
#原始字符串
activities-activity
#提取activity
#查找目标:
(.+)-(.+)
#替换为:
\2
[\x{4e00}-\x{9fa5}]*[\x{4e00}-\x{9fa5}]
把下面的字符串
123abcfg
abc
abcd
#替换成:
123hello
hello
hello
解决方案:表达式替换
查找目标:abc.*$
替换为:hello
替换前截图:
在这里插入图片描述
替换后截图:
123abcfg
abc
abcd
#替换成:
123@abcfg@
@abc@
@abcd@
#表达式
(abc.*)$ 替换为:@\1@
str[1]abc[991]
str[2]abc[992]
str[11]abc[993]
str[222]abc[996]
#替换成
god[991]
god[992]
god[993]
god[996]
#表达式
str[[0-9]+]abc\[([0-9]+)\] 替换为:god[\1]
str[[0-9]+]abc([[0-9]+]) 替换为:god\1
OR:
str\[([0-9]+)\]abc\[([0-9]+)\] 替换为:god[\2]
str([[0-9]+])abc([[0-9]+]) 替换为:god\2
#删除所有空行
step1:a. 选择正则表达式 b. 查找串:^[ \t]*$ 替换串:空
step2:a. 选择扩展 b. 查找串:\r\n\r\n 替换串:\r\n 注:多次点击替换,直到没有可替换的字串
PERMODLOG
RESERVEDETAIL
RESERVEMAIN
#替换为:
db2 "delete from PERMODLOG "
db2 "import from ./data/PERMODLOG.ixf of ixf modified by identityignore insert into PERMODLOG "
db2 "delete from RESERVEDETAIL "
db2 "import from ./data/RESERVEDETAIL.ixf of ixf modified by identityignore insert into RESERVEDETAIL "
db2 "delete from RESERVEMAIN "
db2 "import from ./data/RESERVEMAIN.ixf of ixf modified by identityignore insert into RESERVEMAIN "
#表达式
(^\w+$)
#替换为
db2 \"delete from \1 \" \r\ndb2 \"import from \.\/data\/\1\.ixf of ixf modified by identityignore insert into \1 \"
PERMODLOG
RESERVEDETAIL
RESERVEMAIN
#替换为
db2 "export to ./data/PERMODLOG.ixf of ixf select * from PERMODLOG "
db2 "export to ./data/RESERVEDETAIL.ixf of ixf select * from RESERVEDETAIL "
db2 "export to ./data/RESERVEMAIN.ixf of ixf select * from RESERVEMAIN "
#表达式
(^\w+$)
#替换为
db2 \"export to \.\/data\/\1\.ixf of ixf select \* from \1 \"
alter table MonQryApply add constraint PK_MonQryApply primary key (orderID);
alter table sRegInfo add constraint PK_sRegInfo primary key (MachID);
#替换为
execute immediate 'alter table MonQryApply add constraint PK_MonQryApply primary key (orderID)';
execute immediate 'alter table sRegInfo add constraint PK_sRegInfo primary key (MachID)';
#表达式
(alter.*\))
#替换为
execute immediate '\1'
select * from test_t
#替换为
delete from test_t;
#表达式
^select \*(.+)$
#替换为:
delete \1;
insert into test values(1,'zhangsan');
insert into test values(2,'lisi');
insert into test values(3,'wangwu');
#替换为
go
insert into test values(1,'zhangsan');
go
insert into test values(2,'lisi');
go
insert into test values(3,'wangwu');
#表达式
^insert(.*)
#替换为
go\r\ninsert\1
insert into test values(1,'zhangsan');
insert into test values(2,'lisi');
insert into test values(3,'wangwu');
#替换为:
insert into test values(1,'zhangsan');
go
insert into test values(2,'lisi');
go
insert into test values(3,'wangwu');
go
#表达式
^(\w+.+)$
#替换为
\1\r\ngo
--插入数据1
insert into test values(1,'zhangsan');
--插入数据2
insert into test values(2,'lisi');
--插入数据3
insert into test values(3,'wangwu');
#替换为:
insert into test values(1,'zhangsan');
insert into test values(2,'lisi');
insert into test values(3,'wangwu');
#表达式
^(--.*)$
#替换为
空
create index IX_BUSINESSLIST_ATM_ACCOUNTNO on BUSINESSLIST_ATM (ACCOUNTNO);
create index IX_BUSINESSLIST_ATM_COREID on BUSINESSLIST_ATM (COREID);
create index IX_BUSINESSLIST_ATM_INSERDATE on BUSINESSLIST_ATM (INSERTDATE);
#替换为
create index IX_BUSINESSLIST_ATM_ACCOUNTNO on BUSINESSLIST_ATM (ACCOUNTNOASC)
tablespace GZHINDEX
pctfree 10
initrans 2
maxtrans 255
storage
(
initial 64K
next 1M
minextents 1
maxextents unlimited
);
create index IX_BUSINESSLIST_ATM_COREID on BUSINESSLIST_ATM (COREIDASC)
tablespace GZHINDEX
pctfree 10
initrans 2
maxtrans 255
storage
(
initial 64K
next 1M
minextents 1
maxextents unlimited
);
create index IX_BUSINESSLIST_ATM_INSERDATE on BUSINESSLIST_ATM (INSERTDATEASC)
tablespace GZHINDEX
pctfree 10
initrans 2
maxtrans 255
storage
(
initial 64K
next 1M
minextents 1
maxextents unlimited
);
#表达式
);
#替换为
ASC)\r\n tablespace GZHINDEX\r\n pctfree 10\r\n initrans 2\r\n maxtrans 255\r\n storage\r\n (\r\n initial 64K\r\n next 1M\r\n minextents 1\r\n maxextents unlimited\r\n );\r\n
WFD545
FDS654A
FDS7887
#替换为
'WFD545'
'FDS654A'
'FDS7887'
#表达式:
^(\w+)$
#替换为
'\1'
alter table T_BILL_TOTAL_H modify BAGNAME varchar2(80);
alter table T_BILL_TOTAL_H modify CHECKNAME varchar2(80);
alter table T_BILL_TOTAL_NET modify BAGNAME varchar2(80);
#替换为
alter table T_BILL_TOTAL_H alter BAGNAME set data type varchar(80);
alter table T_BILL_TOTAL_H alter CHECKNAME set data type varchar(80);
alter table T_BILL_TOTAL_NET alter BAGNAME set data type varchar(80);
#表达式
modify (\s*\w+\s*) varchar2\(
#替换为
alter \1 set data type varchar\(
asdfasdf
45646545
asdfasdf
asdfasdf
54564
asdfasdf
#替换为
asdfasdf
asdfasdf
asdfasdf
asdfasdf
#表达式
^[\d]+$\r\n
#替换为空
import BaseHTTPServer
#替换为
import BaseHTTPServer
#表达式
<[^>]*>
#替换为空
https://blog.csdn.net/weixin_43360896/article/details/116310179
https://blog.csdn.net/u010182162/article/details/83689008
https://blog.csdn.net/gdp12315_gu/article/details/51730584
https://www.cnblogs.com/songbiao/p/12470163.html?ivk_sa=1024320u