{"id":183754,"date":"2024-11-10T07:27:16","date_gmt":"2024-11-09T23:27:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/183754\/"},"modified":"2024-11-10T07:27:17","modified_gmt":"2024-11-09T23:27:17","slug":"%e4%bd%bf%e7%94%a8java%e8%aa%9e%e8%a8%80%e5%be%9e%e9%9b%b6%e9%96%8b%e5%a7%8b%e5%89%b5%e5%bb%ba%e5%8d%80%e5%a1%8a%e9%8f%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/183754\/","title":{"rendered":"\u4f7f\u7528Java\u8a9e\u8a00\u5f9e\u96f6\u958b\u59cb\u5275\u5efa\u5340\u584a\u93c8"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8java%e8%aa%9e%e8%a8%80%e5%be%9e%e9%9b%b6%e9%96%8b%e5%a7%8b%e5%89%b5%e5%bb%ba%e5%8d%80%e5%a1%8a%e9%8f%88-nyCCdyoFCb\">\u4f7f\u7528Java\u8a9e\u8a00\u5f9e\u96f6\u958b\u59cb\u5275\u5efa\u5340\u584a\u93c8<\/h1>\n<p>\u5340\u584a\u93c8\u6280\u8853\u81ea\u6bd4\u7279\u5e63\u8a95\u751f\u4ee5\u4f86\uff0c\u5df2\u7d93\u6210\u70ba\u4e00\u500b\u71b1\u9580\u7684\u8a71\u984c\u3002\u5b83\u4e0d\u50c5\u50c5\u662f\u52a0\u5bc6\u8ca8\u5e63\u7684\u57fa\u790e\u6280\u8853\uff0c\u9084\u5728\u91d1\u878d\u3001\u4f9b\u61c9\u93c8\u7ba1\u7406\u3001\u91ab\u7642\u7b49\u591a\u500b\u9818\u57df\u5c55\u73fe\u51fa\u5176\u6f5b\u529b\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Java\u8a9e\u8a00\u5f9e\u96f6\u958b\u59cb\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u7684\u5340\u584a\u93c8\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5340\u584a\u93c8\u7684\u57fa\u672c\u6982\u5ff5\u53ca\u5176\u5be6\u73fe\u65b9\u5f0f\u3002<\/p>\n<h2 id=\"%e5%8d%80%e5%a1%8a%e9%8f%88%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-nyCCdyoFCb\">\u5340\u584a\u93c8\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5340\u584a\u93c8\u662f\u4e00\u7a2e\u5206\u6563\u5f0f\u7684\u6578\u64da\u5eab\u6280\u8853\uff0c\u4e3b\u8981\u7531\u4e00\u7cfb\u5217\u7684\u5340\u584a\u7d44\u6210\uff0c\u6bcf\u500b\u5340\u584a\u5305\u542b\u4e86\u4e00\u7d44\u4ea4\u6613\u6578\u64da\u3002\u9019\u4e9b\u5340\u584a\u901a\u904e\u52a0\u5bc6\u6280\u8853\u93c8\u63a5\u5728\u4e00\u8d77\uff0c\u5f62\u6210\u4e00\u500b\u4e0d\u53ef\u7be1\u6539\u7684\u6578\u64da\u93c8\u3002\u6bcf\u500b\u5340\u584a\u901a\u5e38\u5305\u542b\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\uff1a<\/p>\n<ul>\n<li><strong>\u5340\u584a\u982d\uff08Block Header\uff09<\/strong>\uff1a\u5305\u542b\u5340\u584a\u7684\u5143\u6578\u64da\uff0c\u5982\u6642\u9593\u6233\u3001\u524d\u4e00\u500b\u5340\u584a\u7684\u54c8\u5e0c\u503c\u7b49\u3002<\/li>\n<li><strong>\u4ea4\u6613\u6578\u64da\uff08Transaction Data\uff09<\/strong>\uff1a\u5be6\u969b\u7684\u4ea4\u6613\u4fe1\u606f\u3002<\/li>\n<li><strong>\u54c8\u5e0c\u503c\uff08Hash\uff09<\/strong>\uff1a\u7528\u65bc\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u5b89\u5168\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8java%e5%89%b5%e5%bb%ba%e5%8d%80%e5%a1%8a%e9%8f%88-nyCCdyoFCb\">\u4f7f\u7528Java\u5275\u5efa\u5340\u584a\u93c8<\/h2>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u5c07\u901a\u904e\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\u4f86\u5c55\u793a\u5982\u4f55\u4f7f\u7528Java\u8a9e\u8a00\u5275\u5efa\u4e00\u500b\u57fa\u672c\u7684\u5340\u584a\u93c8\u3002<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e5%8d%80%e5%a1%8a%e9%a1%9e%ef%bc%88block-class%ef%bc%89-nyCCdyoFCb\">1. \u5275\u5efa\u5340\u584a\u985e\uff08Block Class\uff09<\/h3>\n<pre><code>public class Block {\n    private String previousHash;\n    private String data;\n    private String hash;\n    private long timestamp;\n\n    public Block(String data, String previousHash) {\n        this.data = data;\n        this.previousHash = previousHash;\n        this.timestamp = System.currentTimeMillis();\n        this.hash = calculateHash();\n    }\n\n    public String calculateHash() {\n        String input = previousHash + Long.toString(timestamp) + data;\n        return StringUtil.applySha256(input);\n    }\n\n    public String getHash() {\n        return hash;\n    }\n}\n<\/code><\/pre>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e5%8d%80%e5%a1%8a%e9%8f%88%e9%a1%9e%ef%bc%88blockchain-class%ef%bc%89-nyCCdyoFCb\">2. \u5275\u5efa\u5340\u584a\u93c8\u985e\uff08Blockchain Class\uff09<\/h3>\n<pre><code>import java.util.ArrayList;\n\npublic class Blockchain {\n    private ArrayList chain;\n\n    public Blockchain() {\n        chain = new ArrayList();\n        \/\/ \u5275\u5efa\u5275\u4e16\u5340\u584a\n        chain.add(createGenesisBlock());\n    }\n\n    private Block createGenesisBlock() {\n        return new Block(\"Genesis Block\", \"0\");\n    }\n\n    public void addBlock(String data) {\n        Block newBlock = new Block(data, getLatestBlock().getHash());\n        chain.add(newBlock);\n    }\n\n    public Block getLatestBlock() {\n        return chain.get(chain.size() - 1);\n    }\n}\n<\/code><\/pre>\n<h3 id=\"3-%e5%89%b5%e5%bb%ba%e5%b7%a5%e5%85%b7%e9%a1%9e%ef%bc%88stringutil-class%ef%bc%89-nyCCdyoFCb\">3. \u5275\u5efa\u5de5\u5177\u985e\uff08StringUtil Class\uff09<\/h3>\n<pre><code>import java.security.MessageDigest;\n\npublic class StringUtil {\n    public static String applySha256(String input) {\n        try {\n            MessageDigest digest = MessageDigest.getInstance(\"SHA-256\");\n            byte[] hash = digest.digest(input.getBytes(\"UTF-8\"));\n            StringBuilder hexString = new StringBuilder();\n            for (byte b : hash) {\n                String hex = Integer.toHexString(0xff &amp; b);\n                if (hex.length() == 1) hexString.append('0');\n                hexString.append(hex);\n            }\n            return hexString.toString();\n        } catch (Exception e) {\n            throw new RuntimeException(e);\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e6%b8%ac%e8%a9%a6%e5%8d%80%e5%a1%8a%e9%8f%88-nyCCdyoFCb\">\u6e2c\u8a66\u5340\u584a\u93c8<\/h2>\n<p>\u73fe\u5728\uff0c\u6211\u5011\u53ef\u4ee5\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u7684\u6e2c\u8a66\u4f86\u9a57\u8b49\u6211\u5011\u7684\u5340\u584a\u93c8\u662f\u5426\u6b63\u5e38\u904b\u884c\uff1a<\/p>\n<pre><code>public class Main {\n    public static void main(String[] args) {\n        Blockchain blockchain = new Blockchain();\n        blockchain.addBlock(\"\u7b2c\u4e00\u7b46\u4ea4\u6613\");\n        blockchain.addBlock(\"\u7b2c\u4e8c\u7b46\u4ea4\u6613\");\n\n        for (Block block : blockchain.chain) {\n            System.out.println(\"\u5340\u584a\u54c8\u5e0c: \" + block.getHash());\n        }\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-nyCCdyoFCb\">\u7e3d\u7d50<\/h2>\n<p>\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528Java\u8a9e\u8a00\u5f9e\u96f6\u958b\u59cb\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u7684\u5340\u584a\u93c8\u3002\u901a\u904e\u5275\u5efa\u5340\u584a\u985e\u3001\u5340\u584a\u93c8\u985e\u548c\u5de5\u5177\u985e\uff0c\u6211\u5011\u80fd\u5920\u7406\u89e3\u5340\u584a\u93c8\u7684\u57fa\u672c\u7d50\u69cb\u548c\u904b\u4f5c\u539f\u7406\u3002\u96a8\u8457\u5340\u584a\u93c8\u6280\u8853\u7684\u767c\u5c55\uff0c\u8d8a\u4f86\u8d8a\u591a\u7684\u61c9\u7528\u5834\u666f\u5c07\u6703\u51fa\u73fe\uff0c\u638c\u63e1\u9019\u9805\u6280\u8853\u5c07\u5c0d\u672a\u4f86\u7684\u8077\u696d\u751f\u6daf\u5927\u6709\u88e8\u76ca\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u670d\u52d9\u4f86\u90e8\u7f72\u60a8\u7684\u5340\u584a\u93c8\u61c9\u7528\uff0c\u8acb\u8003\u616e\u6211\u5011\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u8b93\u60a8\u7684\u9805\u76ee\u904b\u884c\u5f97\u66f4\u52a0\u9806\u5229\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528Java\u8a9e\u8a00\u5f9e\u96f6\u958b\u59cb\u5275\u5efa\u5340\u584a\u93c8\uff0c\u638c\u63e1\u57fa\u790e\u6982\u5ff5\u8207\u5be6\u4f5c\u6280\u5de7\uff0c\u958b\u555f\u4f60\u7684\u5340\u584a\u93c8\u958b\u767c\u4e4b\u65c5\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-183754","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183754","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=183754"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183754\/revisions"}],"predecessor-version":[{"id":183755,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183754\/revisions\/183755"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=183754"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=183754"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=183754"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}