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如何为字母替换密码（groovy）创建编码器和解码器？

发布于 2024-10-10 17:12:01 字数 44 浏览 4 评论 0原文

基本上我必须在groovy上设计和实现这个，这是为了编码和解码特定的段落？

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傲世九天 2024-10-17 17:12:01

您可以查看此

http://groovy.codehaus.org/ExpandoMetaClass+-+Dynamic+ Method+Names

显示了编解码器的典型用例。

基本上类似（来自该链接）

class HTMLCodec {
    static encode = { theTarget ->
        HtmlUtils.htmlEscape(theTarget.toString())
    }

    static decode = { theTarget ->
        HtmlUtils.htmlUnescape(theTarget.toString())
    }
}

您不会使用 HtmlUtils，但结构是相同的。

编辑 - 这是一个如何进行替换的示例。请注意，这可能更常规，并且它不处理标点符号，但它应该有助于

def plainText = 'hello'
def solutionChars = new char[plainText.size()]
for (def i = 0; i < plainText.size(); i++){
        def currentChar = plainText.charAt(i)
        if (Character.isUpperCase(currentChar))
                solutionChars[i] = Character.toLowerCase(currentChar)
        else
                solutionChars[i] = Character.toUpperCase(currentChar)

}

def cipherText = new String(solutionChars)
println(solutionChars)

编辑 - 这是一个更常规的解决方案

def plainText = 'hello'
def cipherText = ""
plainText.each {c ->
    if (Character.isUpperCase((Character)c))
        cipherText += c.toLowerCase()
    else
        cipherText += c.toUpperCase()
}

println(cipherText)

You can check out this

http://groovy.codehaus.org/ExpandoMetaClass+-+Dynamic+Method+Names

which shows the typical use case for codecs.

Basically something like (from that link)

class HTMLCodec {
    static encode = { theTarget ->
        HtmlUtils.htmlEscape(theTarget.toString())
    }

    static decode = { theTarget ->
        HtmlUtils.htmlUnescape(theTarget.toString())
    }
}

you wont use the HtmlUtils, but the structure is the same.

EDIT -- here is an example on how to do the substitution. Note this can probably be more groovy, and it doesn't deal with punctuation, but it should help

def plainText = 'hello'
def solutionChars = new char[plainText.size()]
for (def i = 0; i < plainText.size(); i++){
        def currentChar = plainText.charAt(i)
        if (Character.isUpperCase(currentChar))
                solutionChars[i] = Character.toLowerCase(currentChar)
        else
                solutionChars[i] = Character.toUpperCase(currentChar)

}

def cipherText = new String(solutionChars)
println(solutionChars)

EDIT -- here is a solution that is a bit more groovy

def plainText = 'hello'
def cipherText = ""
plainText.each {c ->
    if (Character.isUpperCase((Character)c))
        cipherText += c.toLowerCase()
    else
        cipherText += c.toUpperCase()
}

println(cipherText)

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