{"id":64286,"date":"2025-05-03T12:19:03","date_gmt":"2025-05-03T04:19:03","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64286\/"},"modified":"2025-05-03T12:19:03","modified_gmt":"2025-05-03T04:19:03","slug":"java%e4%b8%ad%e5%ad%97%e8%8a%82%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e8%a1%a8%e7%a4%ba-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64286\/","title":{"rendered":"java\u4e2d\u5b57\u8282\u6570\u7ec4\u600e\u4e48\u8868\u793a"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u5b57\u8282\u6570\u7ec4\u4f7f\u7528 byte[] \u58f0\u660e\uff0c\u8868\u793a\u4e00\u4e2a byte \u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\u3002\u58f0\u660e\u548c\u521d\u59cb\u5316\uff1a\u521b\u5efa\u65f6\u5206\u914d\u5e76\u4e0d\u53ef\u53d8\u7684\u957f\u5ea6\uff0c\u6bcf\u4e2a\u5143\u7d20\u662f 8 \u4f4d\u6709\u7b26\u53f7\u6574\u6570\uff08-128 \u5230 127\uff09\uff0c\u53ef\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u3002\u5e38\u89c1\u64cd\u4f5c\u5305\u62ec\u6392\u5e8f\u3001\u586b\u5145\u548c\u590d\u5236\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/03\/2024110303332582270.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u5b57\u8282\u6570\u7ec4\u600e\u4e48\u8868\u793a\u63d2\u56fe\" alt=\"java\u4e2d\u5b57\u8282\u6570\u7ec4\u600e\u4e48\u8868\u793a\u63d2\u56fe\" \/><\/p>\n<p><strong>Java\u4e2d\u5b57\u8282\u6570\u7ec4\u7684\u8868\u793a<\/strong><\/p>\n<p><strong>\u5f00\u95e8\u89c1\u5c71\uff1a<\/strong><br \/>Java\u4e2d\u5b57\u8282\u6570\u7ec4\u4f7f\u7528byte[]\u58f0\u660e\uff0c\u8868\u793a\u4e00\u4e2abyte\u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\u3002<\/p>\n<p><strong>\u8be6\u7ec6\u5c55\u5f00\uff1a<\/strong><\/p>\n<p><strong>\u58f0\u660e\u548c\u521d\u59cb\u5316\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>byte[] byteArray = new byte[10]; \/\/ \u58f0\u660e\u4e00\u4e2a\u957f\u5ea6\u4e3a10\u7684\u5b57\u8282\u6570\u7ec4\nbyteArray[0] = 127; \/\/ \u5c06\u7b2c\u4e00\u4e2a\u5143\u7d20\u8bbe\u7f6e\u4e3a127<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6570\u7ec4\u5143\u7d20\u7684\u7c7b\u578b\uff1a<\/strong><br \/>\u6bcf\u4e2a\u6570\u7ec4\u5143\u7d20\u90fd\u662f8\u4f4d\u6709\u7b26\u53f7\u6574\u6570\uff0c\u8303\u56f4\u4e3a-128\u5230127\u3002<\/p>\n<p><strong>\u6570\u7ec4\u7684\u957f\u5ea6\uff1a<\/strong><br \/>\u5b57\u8282\u6570\u7ec4\u7684\u957f\u5ea6\u662f\u521b\u5efa\u65f6\u5206\u914d\u7684\uff0c\u5e76\u4e14\u662f\u4e0d\u53ef\u53d8\u7684\u3002<\/p>\n<p><strong>\u8bbf\u95ee\u5143\u7d20\uff1a<\/strong><br \/>\u6570\u7ec4\u5143\u7d20\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\uff0c\u7d22\u5f15\u8303\u56f4\u4ece0\u5230\u6570\u7ec4\u957f\u5ea6\u51cf1\u3002<\/p>\n<p><strong>\u904d\u5386\u6570\u7ec4\uff1a<\/strong><br \/>\u53ef\u4ee5\u4f7f\u7528for\u5faa\u73af\u6216\u589e\u5f3afor\u5faa\u73af\u904d\u5386\u5b57\u8282\u6570\u7ec4\uff1a<\/p>\n<pre>for (byte b : byteArray) {\n    System.out.println(b);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u521d\u59cb\u5316\u6570\u7ec4\uff1a<\/strong><br \/>\u5b57\u8282\u6570\u7ec4\u53ef\u4ee5\u5728\u58f0\u660e\u65f6\u521d\u59cb\u5316\uff1a<\/p>\n<pre>byte[] byteArray = {1, 2, 3, 4, 5};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u8f6c\u6362\u5b57\u8282\u6570\u7ec4\uff1a<\/strong><br \/>\u5b57\u8282\u6570\u7ec4\u53ef\u4ee5\u901a\u8fc7String\u7c7b\u6216BigInteger\u7c7b\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u6216\u6574\u6570\uff1a<\/p>\n<pre>String s = new String(byteArray);\nint i = new BigInteger(byteArray).intValue();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u5e38\u89c1\u64cd\u4f5c\uff1a<\/strong><br \/>Java\u63d0\u4f9b\u4e86\u8bb8\u591a\u7528\u4e8e\u5b57\u8282\u6570\u7ec4\u7684\u5e38\u89c1\u64cd\u4f5c\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>Arrays.sort(): \u5bf9\u6570\u7ec4\u8fdb\u884c\u6392\u5e8f<\/li>\n<li>Arrays.fill(): \u7528\u6307\u5b9a\u503c\u586b\u5145\u6570\u7ec4<\/li>\n<li>Arrays.copyOf(): \u8fd4\u56de\u6570\u7ec4\u7684\u4e00\u4e2a\u526f\u672c<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u5b57\u8282\u6570\u7ec4\u600e\u4e48\u8868\u793a\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 \u4e2d\u5b57\u8282\u6570\u7ec4\u4f7f\u7528 byte[] \u58f0\u660e\uff0c\u8868\u793a\u4e00\u4e2a byte \u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\u3002\u58f0\u660e\u548c\u521d\u59cb\u5316\uff1a\u521b\u5efa\u65f6\u5206\u914d\u5e76\u4e0d\u53ef\u53d8\u7684\u957f\u5ea6\uff0c\u6bcf\u4e2a\u5143\u7d20\u662f 8 \u4f4d\u6709\u7b26\u53f7\u6574\u6570\uff08-128 \u5230 127\uff09\uff0c\u53ef\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u3002\u5e38\u89c1\u64cd\u4f5c\u5305\u62ec\u6392\u5e8f\u3001\u586b\u5145\u548c\u590d\u5236\u3002 Java\u4e2d\u5b57\u8282\u6570\u7ec4\u7684\u8868\u793a \u5f00\u95e8\u89c1\u5c71\uff1aJava\u4e2d\u5b57\u8282\u6570\u7ec4\u4f7f\u7528byte[]\u58f0\u660e\uff0c\u8868\u793a\u4e00\u4e2abyte\u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\u3002 \u8be6\u7ec6\u5c55\u5f00\uff1a \u58f0\u660e\u548c\u521d\u59cb\u5316\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b byte[] byteArray = new byte[10]; \/\/ \u58f0\u660e\u4e00\u4e2a\u957f\u5ea6\u4e3a10\u7684\u5b57\u8282\u6570\u7ec4 byteArray[0] = 127; \/\/ \u5c06\u7b2c\u4e00\u4e2a\u5143\u7d20\u8bbe\u7f6e\u4e3a127 \u767b\u5f55\u540e\u590d\u5236 \u6570\u7ec4\u5143\u7d20\u7684\u7c7b\u578b\uff1a\u6bcf\u4e2a\u6570\u7ec4\u5143\u7d20\u90fd\u662f8\u4f4d\u6709\u7b26\u53f7\u6574\u6570\uff0c\u8303\u56f4\u4e3a-128\u5230127\u3002 \u6570\u7ec4\u7684\u957f\u5ea6\uff1a\u5b57\u8282\u6570\u7ec4\u7684\u957f\u5ea6\u662f\u521b\u5efa\u65f6\u5206\u914d\u7684\uff0c\u5e76\u4e14\u662f\u4e0d\u53ef\u53d8\u7684\u3002 \u8bbf\u95ee\u5143\u7d20\uff1a\u6570\u7ec4\u5143\u7d20\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\uff0c\u7d22\u5f15\u8303\u56f4\u4ece0\u5230\u6570\u7ec4\u957f\u5ea6\u51cf1\u3002 \u904d\u5386\u6570\u7ec4\uff1a\u53ef\u4ee5\u4f7f\u7528for\u5faa\u73af\u6216\u589e\u5f3afor\u5faa\u73af\u904d\u5386\u5b57\u8282\u6570\u7ec4\uff1a for (byte b : byteArray) { System.out.println(b); } \u767b\u5f55\u540e\u590d\u5236 \u521d\u59cb\u5316\u6570\u7ec4\uff1a\u5b57\u8282\u6570\u7ec4\u53ef\u4ee5\u5728\u58f0\u660e\u65f6\u521d\u59cb\u5316\uff1a byte[] byteArray = {1, 2, 3, 4, 5}; \u767b\u5f55\u540e\u590d\u5236 \u8f6c\u6362\u5b57\u8282\u6570\u7ec4\uff1a\u5b57\u8282\u6570\u7ec4\u53ef\u4ee5\u901a\u8fc7String\u7c7b\u6216BigInteger\u7c7b\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u6216\u6574\u6570\uff1a String s = [&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-64286","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64286","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=64286"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64286\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64286"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64286"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64286"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}