Question

`<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>100</Amount>
<Location>AA</Location>
</Student>'
'<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>100</Amount>
<Location>AA</Location>
</Student>'
'<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>100</Amount>
<Location>AA</Location>
</Student>`

这里我想使用shell脚本更改Amount的值，我只想要唯一的值。我怎样才能做到这一点。请建议。

Answer 1

[sgeorge@sgeorge-ld staCK]$ cat xml 
<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>100</Amount>
<Location>AA</Location>
</Student>'
'<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>100</Amount>
<Location>AA</Location>
</Student>'
'<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>100</Amount>
<Location>AA</Location>
</Student>

[sgeorge@sgeorge-ld staCK]$ OLDIFS=$IFS; IFS=$'\n'; COUNT=1; for i in `cat xml` ; do echo $i | sed "s/<Amount>.*<\/Amount>/<Amount>"$COUNT"<\/Amount>/g" && ((COUNT++))  ; done ; IFS=$OLDIFS
<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>6</Amount>
<Location>AA</Location>
</Student>'
'<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>14</Amount>
<Location>AA</Location>
</Student>'
'<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>22</Amount>
<Location>AA</Location>
</Student>

OR（如果您想要Amount的真实自定义值），请执行以下操作：

[sgeorge@sgeorge-ld staCK]$ cat amount.txt 
121213424525
1213125435
1313145357460
988783784332
82990190231932

[sgeorge@sgeorge-ld staCK]$ OLDIFS=$IFS; IFS=$'\n'; COUNT=1; for i in `cat xml` ; do echo $i | grep '<Amount>' >/dev/null && AMT=$(tail -1 amount.txt) && sed -i "/^$AMT$/d" amount.txt && echo $i | sed "s/<Amount>.*<\/Amount>/<Amount>"$AMT"<\/Amount>/g" || echo $i ; done ;  IFS=$OLDIFS
<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>82990190231932</Amount>
<Location>AA</Location>
</Student>'
'<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>988783784332</Amount>
<Location>AA</Location>
</Student>'
'<?xml version="1.0" encoding="UTF-8"?>
<StudentInfo Version="1">
<Student>
<StudentId>INS469</StudentId>
<ClassId>21</ClassId>
<Amount>1313145357460</Amount>
<Location>AA</Location>
</Student>

修改

OLDIFS=$IFS; IFS=$'\n'; COUNT=1; for i in `cat xml` ; do echo $i | grep '<Amount>' >/dev/null && AMT=$(tail -1 amount.txt) && sed -i "/^$AMT$/d" amount.txt && echo $i | sed "s/<Amount>.*<\/Amount>/<Amount>"$AMT"<\/Amount>/g" || echo $i ; done > /tmp/xml_output.xml; IFS=$OLDIFS

Answer 2

如果＆＃34; ...＆＃34;标签在一行上，您可以使用以下awk单行（要更改的xml文本存储在＆＃34;文件＆＃34;）：

awk -v AMOUNT=1 '/<Amount>.*<\/Amount>/ { print "<Amount>" AMOUNT++ "</Amount>" ; next } ; { print }' file

从＆＃34; amount_file.txt＆＃34;：

中读取值

awk -v AMOUNT_FILE="amounts_file.txt" '/<Amount>.*<\/Amount>/ { getline AMOUNT < AMOUNT_FILE ; print "<Amount>" AMOUNT++ "</Amount>" ; next } ; { print }' file

在金额文件结束后，金额的值将从文件的最后一个值增加。

更改重复n次的XML标记的值

2 个答案: