{"id":64367,"date":"2025-05-03T17:43:27","date_gmt":"2025-05-03T09:43:27","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64367\/"},"modified":"2025-05-03T17:43:27","modified_gmt":"2025-05-03T09:43:27","slug":"java-%e6%80%8e%e4%b9%88%e6%8a%8a%e5%9b%be%e7%89%87%e8%bd%ac%e4%b8%ba%e5%ad%97%e8%8a%82%e6%95%b0%e7%bb%84-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64367\/","title":{"rendered":"java \u600e\u4e48\u628a\u56fe\u7247\u8f6c\u4e3a\u5b57\u8282\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  \u5c06 java \u4e2d\u7684\u56fe\u50cf\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\uff1a\u521b\u5efa bytearrayoutputstream \u5bf9\u8c61\u5e76\u5199\u5165\u56fe\u50cf\u6570\u636e\u3002\u521b\u5efa imageinputstream \u5bf9\u8c61\u8bfb\u53d6\u56fe\u50cf\u6587\u4ef6\u3002\u9010\u5b57\u8282\u8bfb\u53d6\u56fe\u50cf\u6570\u636e\u5e76\u5199\u5165 bytearrayoutputstream \u5bf9\u8c61\u4e2d\u3002\u8f6c\u6362\u5b8c\u6210\u65f6\uff0cbytearrayoutputstream \u5bf9\u8c61\u5305\u542b\u56fe\u50cf\u5b57\u8282\u6570\u7ec4\u3002\u4f7f\u7528 tobytearray() \u65b9\u6cd5\u83b7\u53d6\u5b57\u8282\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/03\/2024110307192244648.jpg\" class=\"aligncenter\" title=\"java \u600e\u4e48\u628a\u56fe\u7247\u8f6c\u4e3a\u5b57\u8282\u6570\u7ec4\u63d2\u56fe\" alt=\"java \u600e\u4e48\u628a\u56fe\u7247\u8f6c\u4e3a\u5b57\u8282\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5c06 Java \u4e2d\u7684\u56fe\u50cf\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5c06\u56fe\u50cf\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u4efb\u52a1\u3002\u8fd9\u5bf9\u4e8e\u6570\u636e\u5b58\u50a8\u3001\u56fe\u50cf\u4f20\u8f93\u548c\u5404\u79cd\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u975e\u5e38\u6709\u7528\u3002\u4ee5\u4e0b\u6b65\u9aa4\u8bf4\u660e\u4e86\u5982\u4f55\u4f7f\u7528 Java \u5c06\u56fe\u50cf\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\uff1a<\/p>\n<p><strong>1. \u521b\u5efa ByteArrayOutputStream \u5bf9\u8c61<\/strong><\/p>\n<p>ByteArrayOutputStream \u7c7b\u7528\u4e8e\u521b\u5efa\u53ef\u589e\u957f\u7684\u5b57\u8282\u6570\u7ec4\u3002\u901a\u8fc7\u4f7f\u7528\u8be5\u7c7b\uff0c\u60a8\u53ef\u4ee5\u5c06\u56fe\u50cf\u6570\u636e\u9010\u5b57\u8282\u5730\u5199\u5165\u8be5\u6570\u7ec4\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>2. \u521b\u5efa ImageInputStream \u5bf9\u8c61<\/strong><\/p>\n<p>ImageInputStream \u7c7b\u7528\u4e8e\u8bfb\u53d6\u56fe\u50cf\u6587\u4ef6\u3002\u4f7f\u7528 ImageIO.createImageInputStream(File file) \u65b9\u6cd5\u521b\u5efa\u6b64\u5bf9\u8c61\uff0c\u5176\u4e2d file \u662f\u8981\u8f6c\u6362\u7684\u56fe\u50cf\u6587\u4ef6\u3002<\/p>\n<p><strong>3. \u8bfb\u53d6\u56fe\u50cf\u6570\u636e<\/strong><\/p>\n<p>\u4f7f\u7528 ImageInputStream.read() \u65b9\u6cd5\u9010\u5b57\u8282\u8bfb\u53d6\u56fe\u50cf\u6570\u636e\u3002\u5c06\u8bfb\u53d6\u7684\u6570\u636e\u5199\u5165\u5230 ByteArrayOutputStream \u5bf9\u8c61\u4e2d\u3002<\/p>\n<p><strong>4. \u8f6c\u6362\u5b8c\u6210<\/strong><\/p>\n<p>\u91cd\u590d\u6b65\u9aa4 3\uff0c\u76f4\u5230\u8bfb\u53d6\u5b8c\u6574\u4e2a\u56fe\u50cf\u6587\u4ef6\u3002\u6b64\u65f6\uff0cByteArrayOutputStream \u5bf9\u8c61\u5c06\u5305\u542b\u56fe\u50cf\u7684\u5b57\u8282\u6570\u7ec4\u3002<\/p>\n<p><strong>5. \u83b7\u53d6\u5b57\u8282\u6570\u7ec4<\/strong><\/p>\n<p>\u4f7f\u7528 ByteArrayOutputStream.toByteArray() \u65b9\u6cd5\u83b7\u53d6\u5b57\u8282\u6570\u7ec4\u3002\u6b64\u6570\u7ec4\u5305\u542b\u56fe\u50cf\u6570\u636e\u3002<\/p>\n<p><strong>\u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>import java.io.ByteArrayOutputStream;\nimport java.io.File;\nimport java.io.FileInputStream;\nimport java.io.FileOutputStream;\nimport java.io.ImageInputStream;\nimport java.io.IOException;\n\npublic class ImageToByteArray {\n\n    public static byte[] convertImageToByteArray(File imageFile) throws IOException {\n        ByteArrayOutputStream baos = new ByteArrayOutputStream();\n        ImageInputStream iis = ImageIO.createImageInputStream(imageFile);\n\n        int b;\n        while ((b = iis.read()) != -1) {\n            baos.write(b);\n        }\n\n        iis.close();\n        return baos.toByteArray();\n    }\n\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7528\u6cd5\uff1a<\/strong><\/p>\n<pre>File imageFile = new File(\"image.png\");\nbyte[] imageBytes = ImageToByteArray.convertImageToByteArray(imageFile);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava \u600e\u4e48\u628a\u56fe\u7247\u8f6c\u4e3a\u5b57\u8282\u6570\u7ec4\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c06 java \u4e2d\u7684\u56fe\u50cf\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\uff1a\u521b\u5efa bytearrayoutputstream \u5bf9\u8c61\u5e76\u5199\u5165\u56fe\u50cf\u6570\u636e\u3002\u521b\u5efa imageinputstream \u5bf9\u8c61\u8bfb\u53d6\u56fe\u50cf\u6587\u4ef6\u3002\u9010\u5b57\u8282\u8bfb\u53d6\u56fe\u50cf\u6570\u636e\u5e76\u5199\u5165 bytearrayoutputstream \u5bf9\u8c61\u4e2d\u3002\u8f6c\u6362\u5b8c\u6210\u65f6\uff0cbytearrayoutputstream \u5bf9\u8c61\u5305\u542b\u56fe\u50cf\u5b57\u8282\u6570\u7ec4\u3002\u4f7f\u7528 tobytearray() \u65b9\u6cd5\u83b7\u53d6\u5b57\u8282\u6570\u7ec4\u3002 \u5982\u4f55\u5c06 Java \u4e2d\u7684\u56fe\u50cf\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u5c06\u56fe\u50cf\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u4efb\u52a1\u3002\u8fd9\u5bf9\u4e8e\u6570\u636e\u5b58\u50a8\u3001\u56fe\u50cf\u4f20\u8f93\u548c\u5404\u79cd\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u975e\u5e38\u6709\u7528\u3002\u4ee5\u4e0b\u6b65\u9aa4\u8bf4\u660e\u4e86\u5982\u4f55\u4f7f\u7528 Java \u5c06\u56fe\u50cf\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\uff1a 1. \u521b\u5efa ByteArrayOutputStream \u5bf9\u8c61 ByteArrayOutputStream \u7c7b\u7528\u4e8e\u521b\u5efa\u53ef\u589e\u957f\u7684\u5b57\u8282\u6570\u7ec4\u3002\u901a\u8fc7\u4f7f\u7528\u8be5\u7c7b\uff0c\u60a8\u53ef\u4ee5\u5c06\u56fe\u50cf\u6570\u636e\u9010\u5b57\u8282\u5730\u5199\u5165\u8be5\u6570\u7ec4\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b 2. \u521b\u5efa ImageInputStream \u5bf9\u8c61 ImageInputStream \u7c7b\u7528\u4e8e\u8bfb\u53d6\u56fe\u50cf\u6587\u4ef6\u3002\u4f7f\u7528 ImageIO.createImageInputStream(File file) \u65b9\u6cd5\u521b\u5efa\u6b64\u5bf9\u8c61\uff0c\u5176\u4e2d file \u662f\u8981\u8f6c\u6362\u7684\u56fe\u50cf\u6587\u4ef6\u3002 3. \u8bfb\u53d6\u56fe\u50cf\u6570\u636e \u4f7f\u7528 ImageInputStream.read() \u65b9\u6cd5\u9010\u5b57\u8282\u8bfb\u53d6\u56fe\u50cf\u6570\u636e\u3002\u5c06\u8bfb\u53d6\u7684\u6570\u636e\u5199\u5165\u5230 ByteArrayOutputStream \u5bf9\u8c61\u4e2d\u3002 4. \u8f6c\u6362\u5b8c\u6210 \u91cd\u590d\u6b65\u9aa4 3\uff0c\u76f4\u5230\u8bfb\u53d6\u5b8c\u6574\u4e2a\u56fe\u50cf\u6587\u4ef6\u3002\u6b64\u65f6\uff0cByteArrayOutputStream \u5bf9\u8c61\u5c06\u5305\u542b\u56fe\u50cf\u7684\u5b57\u8282\u6570\u7ec4\u3002 5. \u83b7\u53d6\u5b57\u8282\u6570\u7ec4 \u4f7f\u7528 ByteArrayOutputStream.toByteArray() \u65b9\u6cd5\u83b7\u53d6\u5b57\u8282\u6570\u7ec4\u3002\u6b64\u6570\u7ec4\u5305\u542b\u56fe\u50cf\u6570\u636e\u3002 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-64367","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64367","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=64367"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64367\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}