有些在线网站喜欢把所有文本都编码为HTML实体，所以我们看到的不是这个文本：
So I'm looking
So I'm looking 
我想知道是否有内置的方法可以使用任何Emacs内置功能将编码文本转换为常规文本，或者我应该声明我的字符串映射（"&83" => "S" ...）并手动使用映射进行解码。
非常感谢您提供任何指导。
(defun html-entities-to-unicode (string)
(let* ((plist '(Aacute "Á" aacute "á" Acirc "Â" acirc "â" acute "´" AElig "Æ" aelig "æ" Agrave "À" agrave "à" alefsym "ℵ" Alpha "Α" alpha "α" amp "&" and "∧" ang "∠" apos "'" aring "å" Aring "Å" asymp "≈" atilde "ã" Atilde "Ã" auml "ä" Auml "Ä" bdquo "„" Beta "Β" beta "β" brvbar "¦" bull "•" cap "∩" ccedil "ç" Ccedil "Ç" cedil "¸" cent "¢" Chi "Χ" chi "χ" circ "ˆ" clubs "♣" cong "≅" copy "©" crarr "↵" cup "∪" curren "¤" Dagger "‡" dagger "†" darr "↓" dArr "⇓" deg "°" Delta "Δ" delta "δ" diams "♦" divide "÷" eacute "é" Eacute "É" ecirc "ê" Ecirc "Ê" egrave "è" Egrave "È" empty "∅" emsp " " ensp " " Epsilon "Ε" epsilon "ε" equiv "≡" Eta "Η" eta "η" eth "ð" ETH "Ð" euml "ë" Euml "Ë" euro "€" exist "∃" fnof "ƒ" forall "∀" frac12 "½" frac14 "¼" frac34 "¾" frasl "⁄" Gamma "Γ" gamma "γ" ge "≥" gt ">" harr "↔" hArr "⇔" hearts "♥" hellip "…" iacute "í" Iacute "Í" icirc "î" Icirc "Î" iexcl "¡" igrave "ì" Igrave "Ì" image "ℑ" infin "∞" int "∫" Iota "Ι" iota "ι" iquest "¿" isin "∈" iuml "ï" Iuml "Ï" Kappa "Κ" kappa "κ" Lambda "Λ" lambda "λ" lang "〈" laquo "«" larr "←" lArr "⇐" lceil "⌈" ldquo "“" le "≤" lfloor "⌊" lowast "∗" loz "◊" lrm "" lsaquo "‹" lsquo "‘" lt "<" macr "¯" mdash "—" micro "µ" middot "·" minus "−" Mu "Μ" mu "μ" nabla "∇" nbsp "" ndash "–" ne "≠" ni "∋" not "¬" notin "∉" nsub "⊄" ntilde "ñ" Ntilde "Ñ" Nu "Ν" nu "ν" oacute "ó" Oacute "Ó" ocirc "ô" Ocirc "Ô" OElig "Œ" oelig "œ" ograve "ò" Ograve "Ò" oline "‾" omega "ω" Omega "Ω" Omicron "Ο" omicron "ο" oplus "⊕" or "∨" ordf "ª" ordm "º" oslash "ø" Oslash "Ø" otilde "õ" Otilde "Õ" otimes "⊗" ouml "ö" Ouml "Ö" para "¶" part "∂" permil "‰" perp "⊥" Phi "Φ" phi "φ" Pi "Π" pi "π" piv "ϖ" plusmn "±" pound "£" Prime "″" prime "′" prod "∏" prop "∝" Psi "Ψ" psi "ψ" quot "\"" radic "√" rang "〉" raquo "»" rarr "→" rArr "⇒" rceil "⌉" rdquo "”" real "ℜ" reg "®" rfloor "⌋" Rho "Ρ" rho "ρ" rlm "" rsaquo "›" rsquo "’" sbquo "‚" scaron "š" Scaron "Š" sdot "⋅" sect "§" shy "" Sigma "Σ" sigma "σ" sigmaf "ς" sim "∼" spades "♠" sub "⊂" sube "⊆" sum "∑" sup "⊃" sup1 "¹" sup2 "²" sup3 "³" supe "⊇" szlig "ß" Tau "Τ" tau "τ" there4 "∴" Theta "Θ" theta "θ" thetasym "ϑ" thinsp " " thorn "þ" THORN "Þ" tilde "˜" times "×" trade "™" uacute "ú" Uacute "Ú" uarr "↑" uArr "⇑" ucirc "û" Ucirc "Û" ugrave "ù" Ugrave "Ù" uml "¨" upsih "ϒ" Upsilon "Υ" upsilon "υ" uuml "ü" Uuml "Ü" weierp "℘" Xi "Ξ" xi "ξ" yacute "ý" Yacute "Ý" yen "¥" yuml "ÿ" Yuml "Ÿ" Zeta "Ζ" zeta "ζ" zwj "" zwnj ""))
(get-function (lambda (s) (or (plist-get plist (intern (substring s 1 -1))) s))))
(replace-regexp-in-string "&[^; ]*;" get-function string)))
(defun ajs-decimal-escapes-to-unicode (start end)
"Convert escapes like 'λ' to Unicode like 'λ'.
Operates on the active region or the whole buffer."
(interactive (list (point) (mark)))
(or (use-region-p)
(setq start (point-min) end (point-max)))
(insert (replace-regexp-in-string
"&#[0-9]*;"
(lambda (match)
(format "%c" (string-to-number (substring match 2 -1))))
(filter-buffer-substring start end t))))
@konr的回答很有帮助-谢谢！我也一直在享受在Emacs Lisp中编程入门。这是我写的第一个可能有用的Lisp。我很感激反馈，即使是像空格这样的细节；谢谢！
不知道是否有内置函数，但是这个小函数可以完成任务：
(defun my-insert-encode-entities-string (str)
(mapconcat
(lambda (char) (format "&#%d;" char))
(string-to-list str)
""))
如果您只想编码HTML实体，请改用url-insert-entities-in-string。
(my-insert-encode-entities-string "So I'm looking") 会返回与您提供的完全相同的结果。变量 char 包含当前表示为整数的字符，因此在这种特殊情况下，我认为使用 %s 还是 %d 都无关紧要。 - viam0Zah