{"id":64163,"date":"2025-05-03T17:00:39","date_gmt":"2025-05-03T09:00:39","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64163\/"},"modified":"2025-05-03T17:00:39","modified_gmt":"2025-05-03T09:00:39","slug":"java%e6%95%b4%e6%95%b0%e6%80%8e%e4%b9%88%e5%8f%98%e6%88%90%e5%ad%97%e8%8a%82%e6%95%b0%e7%bb%84-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64163\/","title":{"rendered":"java\u6574\u6570\u600e\u4e48\u53d8\u6210\u5b57\u8282\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  java \u6574\u6570\u53ef\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\uff0c\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528 bytebuffer\uff1a\u5c06\u6574\u6570\u6dfb\u52a0\u5230\u7f13\u51b2\u533a\uff0c\u7136\u540e\u83b7\u53d6\u5b57\u8282\u6570\u7ec4\u3002\u4f7f\u7528\u4f4d\u64cd\u4f5c\uff1a\u624b\u52a8\u5c06\u6574\u6570\u7684\u6bcf\u4e2a\u5b57\u8282\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff08\u5982 apache commons lang\uff09\uff1a\u5229\u7528\u9884\u5b9a\u4e49\u7684\u65b9\u6cd5\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\u3002\u9009\u62e9\u65b9\u6cd5\u65f6\u8003\u8651\u9700\u6c42\u548c\u504f\u597d\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/02\/2024110216155777281.jpg\" class=\"aligncenter\" title=\"java\u6574\u6570\u600e\u4e48\u53d8\u6210\u5b57\u8282\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u6574\u6570\u600e\u4e48\u53d8\u6210\u5b57\u8282\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5c06 Java \u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4<\/strong><\/p>\n<p>\u5c06 Java \u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u4efb\u52a1\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5b8c\u6210\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 ByteBuffer<\/strong><\/p>\n<p>ByteBuffer \u63d0\u4f9b\u4e86\u4e00\u4e2a\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\u7684\u4fbf\u6377\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u5b83\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>import java.nio.ByteBuffer;\n\npublic class Main {\n    public static void main(String[] args) {\n        int myInt = 12345; \/\/ \u8981\u8f6c\u6362\u7684\u6574\u6570\n\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u5b57\u8282\u7f13\u51b2\u533a\u5e76\u4f7f\u7528putInt()\u65b9\u6cd5\u6dfb\u52a0\u6574\u6570\n        ByteBuffer buffer = ByteBuffer.allocate(4);\n        buffer.putInt(myInt);\n\n        \/\/ \u83b7\u53d6\u7f13\u51b2\u533a\u7684\u5b57\u8282\u6570\u7ec4\n        byte[] bytes = buffer.array();\n\n        \/\/ \u6253\u5370\u5b57\u8282\u6570\u7ec4\n        for (byte b : bytes) {\n            System.out.println(b);\n        }\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528\u4f4d\u64cd\u4f5c<\/strong><\/p>\n<p>\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4f4d\u64cd\u4f5c\u624b\u52a8\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\uff1a<\/p>\n<pre>public class Main {\n    public static void main(String[] args) {\n        int myInt = 12345; \/\/ \u8981\u8f6c\u6362\u7684\u6574\u6570\n\n        byte[] bytes = new byte[4]; \/\/ \u521b\u5efa\u4e00\u4e2a\u5b57\u8282\u6570\u7ec4\u6765\u5b58\u50a8\u6574\u6570\n\n        \/\/ \u5c06\u6574\u6570\u7684\u6bcf\u4e2a\u5b57\u8282\u5355\u72ec\u5b58\u50a8\u5728\u5b57\u8282\u6570\u7ec4\u4e2d\n        for (int i = 0; i &lt; 4; i++) {\n            bytes[i] = (byte) (myInt &gt;&gt; (8 * i));\n        }\n\n        \/\/ \u6253\u5370\u5b57\u8282\u6570\u7ec4\n        for (byte b : bytes) {\n            System.out.println(b);\n        }\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93<\/strong><\/p>\n<p>\u8fd8\u6709\u8bb8\u591a\u7b2c\u4e09\u65b9\u5e93\u53ef\u4ee5\u5e2e\u52a9\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\uff0c\u4f8b\u5982 Apache Commons Lang\uff1a<\/p>\n<pre>import org.apache.commons.lang3.ArrayUtils;\n\npublic class Main {\n    public static void main(String[] args) {\n        int myInt = 12345; \/\/ \u8981\u8f6c\u6362\u7684\u6574\u6570\n\n        \/\/ \u4f7f\u7528ArrayUtils.toByteArray()\u65b9\u6cd5\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\n        byte[] bytes = ArrayUtils.toByteArray(myInt);\n\n        \/\/ \u6253\u5370\u5b57\u8282\u6570\u7ec4\n        for (byte b : bytes) {\n            System.out.println(b);\n        }\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u54ea\u79cd\u65b9\u6cd5\u6700\u9002\u5408\u4f60\u5c06\u53d6\u51b3\u4e8e\u4f60\u7684\u7279\u5b9a\u9700\u6c42\u548c\u504f\u597d\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6574\u6570\u600e\u4e48\u53d8\u6210\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>java \u6574\u6570\u53ef\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\uff0c\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528 bytebuffer\uff1a\u5c06\u6574\u6570\u6dfb\u52a0\u5230\u7f13\u51b2\u533a\uff0c\u7136\u540e\u83b7\u53d6\u5b57\u8282\u6570\u7ec4\u3002\u4f7f\u7528\u4f4d\u64cd\u4f5c\uff1a\u624b\u52a8\u5c06\u6574\u6570\u7684\u6bcf\u4e2a\u5b57\u8282\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff08\u5982 apache commons lang\uff09\uff1a\u5229\u7528\u9884\u5b9a\u4e49\u7684\u65b9\u6cd5\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\u3002\u9009\u62e9\u65b9\u6cd5\u65f6\u8003\u8651\u9700\u6c42\u548c\u504f\u597d\u3002 \u5982\u4f55\u5c06 Java \u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4 \u5c06 Java \u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u4efb\u52a1\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5b8c\u6210\uff1a 1. \u4f7f\u7528 ByteBuffer ByteBuffer \u63d0\u4f9b\u4e86\u4e00\u4e2a\u5c06\u6574\u6570\u8f6c\u6362\u4e3a\u5b57\u8282\u6570\u7ec4\u7684\u4fbf\u6377\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u5b83\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b import java.nio.ByteBuffer; public class Main { public static void main(String[] args) { int myInt = 12345; \/\/ \u8981\u8f6c\u6362\u7684\u6574\u6570 \/\/ \u521b\u5efa\u4e00\u4e2a\u5b57\u8282\u7f13\u51b2\u533a\u5e76\u4f7f\u7528putInt()\u65b9\u6cd5\u6dfb\u52a0\u6574\u6570 ByteBuffer buffer = ByteBuffer.allocate(4); buffer.putInt(myInt); \/\/ \u83b7\u53d6\u7f13\u51b2\u533a\u7684\u5b57\u8282\u6570\u7ec4 byte[] bytes = buffer.array(); \/\/ \u6253\u5370\u5b57\u8282\u6570\u7ec4 for (byte b : [&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-64163","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64163","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=64163"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64163\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}