grails - grails 中的编码和解码如何使用grails 中的decodeHTML 和encodeAsHTML 进行？

Question

我试图了解如何使用decodeHTML 和encodeAsHTML 在grails 中进行编码和解码

//解码 示例是

List symbols = ['!', '*', '/']
symbols.each { String symbol ->
    println symbol.decodeHTML()
}

它应该打印

!    // but it prints !
*   // but it prints *
/   // but it prints /

//编码示例为

List symbols = ['!', '*', '/']
symbols.each { String symbol ->
    println symbol.encodeAsHTML()
}

它应该打印

'!'  // but it prints !
'*'  // but it prints *
'/'  // but it prints /

Answer 1

escapeAsHtml 最终在 apache commons lang 中调用 StringEscapeUtils.escapeHtml

正如该方法的文档中所述；

Escapes the characters in a String using HTML entities.

For example:

"bread" & "butter"

becomes: "bread" & "butter".

Supports all known HTML 4.0 entities, including funky accents. Note that the commonly used apostrophe escape character (') is not a legal entity and so is not supported).

它不会将所有字符转换为其实体值，因此 !、* 和 / 等内容保持原样。下面是 Groovy 中的一个示例:

@Grab( 'commons-lang:commons-lang:2.6' )
import static org.apache.commons.lang.StringEscapeUtils.escapeHtml

'!@£$%^&*()_+€-={}[]:"|;\'\\<>?,./~'.each {
    println "$it -> ${escapeHtml( it )}"
}

打印:

! -> !
@ -> @
£ -> £
$ -> $
% -> %
^ -> ^
& -> &
* -> *
( -> (
) -> )
_ -> _
+ -> +
€ -> €
- -> -
= -> =
{ -> {
} -> }
[ -> [
] -> ]
: -> :
" -> "
| -> |
; -> ;
' -> '
\ -> \
< -> &lt;
> -> &gt;
? -> ?
, -> ,
. -> .
/ -> /
~ -> ~