Question

以下是示例XML文件。我需要将第三个标记（AAA）的值替换为第五个标记。

<head>
    <firsttag>
        <secondtag>
            <thirdtag>AAA</thirdtag>    
            <a><thirdtag>1111</thirdtag></a>
            <fifithtag>A123</fifthtag>    
        </secondtag>
    </firsttag>
    ...
    ...    
    <firsttag>    
        <secondtag>
            <thirdtag>AAA</thirdtag>   
            <a><thirdtag>1111</thirdtag></a>
            <fifithtag>A123</fifthtag>
        </secondtag>
    </firsttag>
</head>

输出应为

<head>
    <firsttag>
        <secondtag>
            <thirdtag>AAA</thirdtag>
            <a><thirdtag>1111</thirdtag></a>
            <fifithtag>AAA</fifthtag>
        </secondtag>
    </firsttag>
    ...
    ...
    <firsttag>
        <secondtag>
            <thirdtag>AAA</thirdtag>
            <a><thirdtag>1111</thirdtag></a>
            <fifithtag>AAA</fifthtag>
        </secondtag>
    </firsttag>
</head>

Answer 1

我不确定我是否已完全理解你的问题，但这里有一个awk脚本，它看起来像是你所要求的。它不是100％健壮的，因为你实际上需要一些能够真正解析XML的东西。

awk -f this.script＆lt; inputfile＆gt; OUTPUTFILE

$0 ~ "<secondtag>" {
    S = 1
}

$0 ~ "</secondtag>" {
    S = 0
}

$0 ~ "<thirdtag>" && S {
    B = index($0, ">")
    T = substr($0, B+1)
    E = index(T, "<")
    V = substr(T, 1, E-1)
}

$0 ~ "<fifthtag>" {
    B = index($0, ">")
    F = substr($0, 1, B)
    T = substr($0, B+1)
    E = index(T, "<")
    R = substr(T, E)
    printf "%s%s%s\n", F,V,R
    next
}

{
    print
}

使用shell将XML标记的值替换为另一个

1 个答案: