我想提供一個簡單的 Spring Boot API，其中我有一個 svg 檔案作為字串。每當呼叫我的 get api (/downloadsvg) 時，我應該能夠下載 svg 檔案。
我已經嘗試如下， ? 我形成了一個 svg 字串 ? 我嘗試將 svg 字串轉換為輸入流
InputStream stream = new ByteArrayInputStream(AUSTRALIAN_BADGE.getBytes(StandardCharsets.UTF_8));
used produces = MediaType.APPLICATION_OCTET_STREAM_VALUE
不知何故，我無法下載它并最終出現錯誤。如果給出一些指示會很棒。
我的 get API 呼叫看起來像這樣（不介意代碼標準，一旦我完成邏輯就想改進它）
@GetMapping(value = "/downloadsvg",produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)
public ResponseEntity<InputStream> downloadSvgImage() {
final String AUSTRALIAN_BADGE= "<svg x=\"0\" y=\"0\" width=\"230\" height=\"84\" overflow=\"hidden\" preserveAspectRatio=\"xMidYMid\" xml:space=\"default\" viewbox=\"0 0 230 84\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" xmlns:xml=\"http://www.w3.org/XML/1998/namespace\" version=\"1.1\">\n"
" <rect x=\"1\" y=\"1\" width=\"228px\" height=\"82px\" rx=\"5\" ry=\"5\" stroke=\"#125430\" stroke-width=\"2\" xml:space=\"default\" style=\"fill:#FFFFFF;\" />\n"
" <text id=\"FirstLineBadge\" xml:space=\"default\" x=\"66px\" y=\"18.18182px\" style=\"fill:Color [A=255, R=58, G=71, B=78];\" font-family=\"Fresh Sans Md\" font-size=\"14\">Made in Australia from</text>\n"
" <text id=\"SecondLineBadge\" xml:space=\"default\" x=\"66px\" y=\"36.36364px\" style=\"fill:Color [A=255, R=58, G=71, B=78];\" font-family=\"Fresh Sans Md\" font-size=\"14\">at least 98% Australian</text>\n"
" <text id=\"ThirdLineBadge\" xml:space=\"default\" x=\"66px\" y=\"54.54546px\" style=\"fill:Color [A=255, R=58, G=71, B=78];\" font-family=\"Fresh Sans Md\" font-size=\"14\">ingredients</text>\n"
" <svg id=\"kangaroo\" xml:space=\"default\" width=\"48\" height=\"42\" viewbox=\"0 0 48 42\" x=\"10\" y=\"10\">\n"
" <path d=\"M47.7 39.1 L25.6 1 C25.3 0.4 24.6 0 23.9 0 C23.2 0 22.6 0.4 22.2 1 L0.1999989 39.2 C0.1 39.5 0 39.8 0 40.1 C0 41.1 0.9 42 1.9 42 L46.2 42 C47.2 42 48.1 41.1 48.1 40.1 C48.1 39.8 48 39.4 47.7 39.1 L47.7 39.1 z\" xml:space=\"default\" class=\"logo\" style=\"fill:#F7A30A;\" />\n"
" <path d=\"M47.7 39.1 L25.6 1 C25.3 0.4 24.6 0 23.9 0 C23.2 0 22.6 0.4 22.2 1 L6.7 28 C11.6 28.3 14 26 16.3 23.9 C18.3 22 20.5 20 24 20 C28.6 20 30.9 24.2 31 24.4 C31.3 25.1 31 25.8 30.4 26.1 C29.8 26.4 29 26.1 28.7 25.5 C28.6 25.3 26.8 22.5 24 22.5 C21.5 22.5 20 23.9 18.1 25.7 C14.8 28.9 10.2 30.4 5.700001 29.7 L0.3000007 39.1 C0.1 39.5 0 39.8 0 40.1 C0 41.1 0.9 42 1.9 42 L24.2 42 L21.3 37.8 C20.6 36.7 20.6 35.2 21.4 34.1 L24.7 28.9 C24.9 28.6 25.2 28.4 25.5 28.3 C25.8 28.2 26.2 28.3 26.5 28.5 C27.1 28.9 27.3 29.7 26.9 30.3 L23.6 35.6 C23.4 36 23.3 36.1 23.5 36.5 C24.1 37.5 27.1 41.9 27.2 42 L46.2 42 C47.2 42 48.1 41.1 48.1 40.1 C48.1 39.8 48 39.4 47.7 39.1 L47.7 39.1 z M38.8 28.6 C38.5 29 38 29.1 37.6 28.8 C37 28.5 36.3 28.3 35.6 28.3 C34.4 28.3 33.2 28.8 32.3 29.7 L27.8 35.3 C27.6 35.5 27.4 35.6 27.1 35.6 C26.9 35.6 26.6 35.5 26.5 35.3 C26.4 35.1 26.3 34.9 26.3 34.7 C26.3 34.5 26.4 34.4 26.4 34.2 L29.4 29.2 C30.5 27.2 32.5 25.9 34.8 25.8 L34 22.8 C33.9 22.4 34 22 34.3 21.8 C34.7 21.5 35.2 21.6 35.4 22 C35.4 22 35.4 22 35.4 22.1 L38.9 27.5 C39 27.9 39 28.3 38.8 28.6 z\" xml:space=\"default\" class=\"logo\" style=\"fill:#125430;\" />\n"
" <path d=\"M35.4 22.2 C35.2 21.8 34.7 21.7 34.3 21.9 C34.3 21.9 34.3 21.9 34.2 21.9 C33.90001 22.1 33.8 22.5 33.90001 22.9 L34.7 25.9 C32.40001 26 30.3 27.3 29.3 29.3 L26.3 34.3 C26.2 34.5 26.2 34.6 26.2 34.8 C26.2 35 26.3 35.2 26.40001 35.4 C26.60001 35.6 26.8 35.7 27.00001 35.7 C27.3 35.7 27.50001 35.6 27.70001 35.4 L32.2 29.8 C33 28.9 34.2 28.3 35.5 28.4 C36.2 28.4 36.90001 28.6 37.5 28.9 C37.90001 29.1 38.40001 29 38.7 28.7 C39 28.4 39 27.9 38.8 27.6 L35.4 22.2 z\" xml:space=\"default\" class=\"logo\" style=\"fill:#F7A30A;\" />\n"
" <path d=\"M6.6 28 L5.6 29.8 L5.6 29.8 L6.6 28 L6.6 28 z\" xml:space=\"default\" class=\"logo\" style=\"fill:#F7A30A;\" />\n"
" <path d=\"M18 25.8 C19.9 24 21.4 22.6 23.9 22.6 C26.7 22.6 28.4 25.4 28.6 25.6 C28.9 26.2 29.7 26.5 30.4 26.1 C31 25.8 31.2 25 31 24.4 C30.9 24.2 28.6 20 24 20 C20.5 20 18.4 22 16.3 23.9 C14.1 26.1 11.7 28.3 6.699999 28 L5.699999 29.8 C10.2 30.5 14.7 29 18 25.8 z\" xml:space=\"default\" class=\"logo\" style=\"fill:#F7A30A;\" />\n"
" <polygon xml:space=\"default\" class=\"logo\" points=\"24.2,42 27.1,42 27.1,42 24.2,42 \" style=\"fill:#F7A30A;\" />\n"
" <path d=\"M23.5 35.6 L26.8 30.4 C27.2 29.8 27 29 26.4 28.6 C26.1 28.4 25.7 28.3 25.4 28.4 C25.1 28.5 24.8 28.7 24.6 29 L21.4 34.2 C20.6 35.3 20.6 36.7 21.3 37.9 L24.3 42.1 L27.2 42.1 C27.1 42 24.2 37.6 23.5 36.6 C23.2 36.1 23.3 36 23.5 35.6 z\" xml:space=\"default\" class=\"logo\" style=\"fill:#F7A30A;\" />\n"
" </svg>\n"
"</svg>";
HttpHeaders header = new HttpHeaders();
header.add(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=img.svg");
header.add("Cache-Control", "no-cache, no-store, must-revalidate");
header.add("Pragma", "no-cache");
header.add("Expires", "0");
InputStream stream = new ByteArrayInputStream(AUSTRALIAN_BADGE.getBytes(StandardCharsets.UTF_8));
return ResponseEntity.ok()
.headers(header)
.contentLength(AUSTRALIAN_BADGE.length())
.contentType(MediaType.APPLICATION_OCTET_STREAM)
.body(stream);
}
uj5u.com熱心網友回復：
只需回傳帶有正確標頭的 byte[] 陣列：
@GetMapping(value = "/downloadsvg")
public ResponseEntity<byte[]> downloadSvgImage() {
final String AUSTRALIAN_BADGE= "<svg x=\"0\" y=\"0
...
...</svg>";
HttpHeaders header = new HttpHeaders();
header.add("Content-Type","image/svg xml");
return ResponseEntity.ok()
.headers(header)
.body(AUSTRALIAN_BADGE.getBytes());
我嘗試此代碼時得到的影像是：[1]：https ://i.stack.imgur.com/B5w0l.png
轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/523988.html
標籤：弹簧靴svg