{"id":876,"date":"2018-07-20T09:19:32","date_gmt":"2018-07-20T01:19:32","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=876"},"modified":"2018-07-20T09:19:32","modified_gmt":"2018-07-20T01:19:32","slug":"%e3%80%90%e5%ad%97%e7%ac%a6%e7%bc%96%e7%a0%81%e3%80%91java%e7%bc%96%e7%a0%81%e6%a0%bc%e5%bc%8f%e6%8e%a2%e7%a7%98","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=876","title":{"rendered":"\u3010\u5b57\u7b26\u7f16\u7801\u3011Java\u7f16\u7801\u683c\u5f0f\u63a2\u79d8"},"content":{"rendered":"<p><strong>\u4e00\u3001\u524d\u8a00<\/strong><\/p>\n<p>\u5728\u5206\u6790Comparable\u548cComparator\u7684\u65f6\u5019\uff0c\u5206\u6790\u5230\u4e86String\u7c7b\u7684compareTo\u65b9\u6cd5\uff0cString\u5e95\u5c42\u662f\u7528char[]\u6570\u7ec4\u6765\u5b58\u653e\u5143\u7d20\uff0c\u5728\u6bd4\u8f83\u7684\u65f6\u5019\u662f\u6bd4\u8f83\u7684\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\uff0c\u5b57\u7b26\u7528char\u6765\u5b58\u50a8\uff0c\u6b64\u65f6\uff0c\u7a81\u7136\u60f3\u5230\uff0cJava\u91cc\u9762\u7684char\u53ef\u4ee5\u5b58\u653e\u4e2d\u6587\u5417\uff1f\u540e\u6765\u53d1\u73b0\u662f\u53ef\u4ee5\u7684\uff0c\u5e76\u4e14\u7531\u6b64\u4e5f\u5f15\u51fa\u4e86Java\u4e2d\u5b57\u7b26\u7684\u7f16\u7801\u683c\u5f0f\u95ee\u9898\u3002<\/p>\n<p><strong>\u4e8c\u3001Java\u5b58\u50a8\u683c\u5f0f<\/strong><\/p>\n<p>\u5728Java\u4e2d\uff0c\u5982\u4e0b\u4ee3\u7801\u83b7\u53d6\u4e86\u5b57\u7b26&#8217;\u5f20&#8217;\u7684\u5404\u79cd\u7f16\u7801\u683c\u5f0f\u3002<\/p>\n<div class=\"cnblogs_code\">\n<div class=\"cnblogs_code_toolbar\"><span class=\"cnblogs_code_copy\"><a title=\"\u590d\u5236\u4ee3\u7801\"><img decoding=\"async\" src=\"https:\/\/common.cnblogs.com\/images\/copycode.gif\" alt=\"\u590d\u5236\u4ee3\u7801\" \/><\/a><\/span><\/div>\n<pre>import java.io.UnsupportedEncodingException;\npublic class Test {\n    public static String getCode(String content, String format) throws UnsupportedEncodingException {\n        byte[] bytes = content.getBytes(format);\n        StringBuffer sb = new StringBuffer();\n        for (int i = 0; i &lt; bytes.length; i++) {\n            sb.append(Integer.toHexString(bytes[i] &amp; 0xff).toUpperCase() + \" \");\n        }\n\n        return sb.toString();\n    }\n    public static void main(String[] args) throws UnsupportedEncodingException {\n        System.out.println(\"gbk : \" + getCode(\"\u5f20\", \"gbk\"));\n        System.out.println(\"gb2312 : \" + getCode(\"\u5f20\", \"gb2312\"));\n        System.out.println(\"iso-8859-1 : \" + getCode(\"\u5f20\", \"iso-8859-1\"));\n        System.out.println(\"unicode : \" + getCode(\"\u5f20\", \"unicode\"));\n\u3000\u3000\u3000\u3000System.out.println(\"utf-16 : \" + getCode(\"\u5f20\", \"utf-16\"));\n        System.out.println(\"utf-8 : \" + getCode(\"\u5f20\", \"utf-8\"));\n\u3000\u3000}\n}<\/pre>\n<div class=\"cnblogs_code_toolbar\"><span class=\"cnblogs_code_copy\"><a title=\"\u590d\u5236\u4ee3\u7801\"><img decoding=\"async\" src=\"https:\/\/common.cnblogs.com\/images\/copycode.gif\" alt=\"\u590d\u5236\u4ee3\u7801\" \/><\/a><\/span><\/div>\n<\/div>\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n<div class=\"cnblogs_code\">\n<div class=\"cnblogs_code_toolbar\"><span class=\"cnblogs_code_copy\"><a title=\"\u590d\u5236\u4ee3\u7801\"><img decoding=\"async\" src=\"https:\/\/common.cnblogs.com\/images\/copycode.gif\" alt=\"\u590d\u5236\u4ee3\u7801\" \/><\/a><\/span><\/div>\n<pre>gbk : D5 C5\ngb2312 : D5 C5\niso-8859-1 : 3F\nunicode : FE FF 5F 20\nutf-16 : FE FF 5F 20\nutf-8 : E5 BC A0<\/pre>\n<div class=\"cnblogs_code_toolbar\"><span class=\"cnblogs_code_copy\"><a title=\"\u590d\u5236\u4ee3\u7801\"><img decoding=\"async\" src=\"https:\/\/common.cnblogs.com\/images\/copycode.gif\" alt=\"\u590d\u5236\u4ee3\u7801\" \/><\/a><\/span><\/div>\n<\/div>\n<p>\u8bf4\u660e\uff1a\u4ece\u7ed3\u679c\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\uff0c\u5b57\u7b26&#8217;\u5f20&#8217;\u7684gbk\u4e0egb2312\u7f16\u7801\u662f\u76f8\u540c\u7684\uff0cunicode\u4e0eutf-16\u7f16\u7801\u65f6\u76f8\u540c\u7684\uff0c\u4f46\u662f\u5176iso-8859-1\u3001unicode\u3001utf-8\u7f16\u7801\u90fd\u662f\u4e0d\u76f8\u540c\u7684\uff0c\u81f3\u4e8e\u5404\u4e2a\u7f16\u7801\u7684\u542b\u4e49\uff0c\u6211\u4eec\u8fd9\u91cc\u4e0d\u7ed9\u51fa\u89e3\u91ca\uff0c\u4e0b\u4e00\u7bc7\u4f1a\u7ed9\u51fa\u7b54\u6848\u3002\u90a3\u4e48\uff0c\u5728JVM\u4e2d\uff0c\u5b57\u7b26&#8217;\u5f20&#8217;\u662f\u6309\u7167\u54ea\u79cd\u7f16\u7801\u683c\u5f0f\u8fdb\u884c\u5b58\u50a8\u7684\u5462\uff1f\u4e0b\u9762\u5f00\u59cb\u6211\u4eec\u7684\u5206\u6790\u3002<\/p>\n<p><strong>\u4e09\u3001\u63a2\u79d8\u601d\u8def<\/strong><\/p>\n<p>1. \u67e5\u770b.class\u6587\u4ef6\u5e38\u91cf\u6c60\u7684\u5b58\u50a8\u683c\u5f0f<\/p>\n<p>\u6d4b\u8bd5\u4ee3\u7801\u5982\u4e0b<\/p>\n<div class=\"cnblogs_code\">\n<pre>public class Test {\n    public static void main(String[] args) {\n        String str = \"\u5f20\";\n    }\n}<\/pre>\n<\/div>\n<p>\u4f7f\u7528javap -verbose Test.class\u8fdb\u884c\u53cd\u7f16\u8bd1\uff0c\u53d1\u73b0\u5e38\u91cf\u6c60\u60c5\u51b5\u5982\u4e0b\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/616953\/201603\/616953-20160323200459604-655970015.png\" alt=\"\" \/><\/p>\n<p>\u518d\u4f7f\u7528winhex\u6253\u5f00class\u6587\u4ef6\uff0c\u53d1\u73b0\u5b57\u7b26&#8217;\u5f20&#8217;\u5728\u5e38\u91cf\u6c60\u7684\u5b58\u50a8\u5982\u4e0b<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/images2015.cnblogs.com\/blog\/616953\/201603\/616953-20160323203041729-1206185765.jpg\" alt=\"\" \/><\/p>\n<p>\u8bf4\u660e\uff1a\u4e0a\u9762\u4e24\u5f20\u53ef\u4ee5\u5728class\u6587\u4ef6\u4e2d\u662f\u4ee5utf-8\u7684\u683c\u5f0f\u5b58\u50a8\u7684\u3002<\/p>\n<p>\u4f46\u662f\u5728\u8fd0\u884c\u65f6\u662f\u5426\u662futf-8\u683c\u5f0f\u5462\uff1f\u7ee7\u7eed\u6211\u4eec\u7684\u63a2\u79d8\u4e4b\u65c5\u3002<\/p>\n<p>2. \u5728\u7a0b\u5e8f\u4e2d\u4e00\u63a2\u7a76\u7adf<\/p>\n<p>\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801<\/p>\n<div class=\"cnblogs_code\">\n<div class=\"cnblogs_code_toolbar\"><span class=\"cnblogs_code_copy\"><a title=\"\u590d\u5236\u4ee3\u7801\"><img decoding=\"async\" src=\"https:\/\/common.cnblogs.com\/images\/copycode.gif\" alt=\"\u590d\u5236\u4ee3\u7801\" \/><\/a><\/span><\/div>\n<pre>public class Test {\n    public static void main(String[] args) {\n        String str = \"\u5f20\";\n        System.out.println(Integer.toHexString(str.codePointAt(0)).toUpperCase());\n    }\n}<\/pre>\n<div class=\"cnblogs_code_toolbar\"><span class=\"cnblogs_code_copy\"><a title=\"\u590d\u5236\u4ee3\u7801\"><img decoding=\"async\" src=\"https:\/\/common.cnblogs.com\/images\/copycode.gif\" alt=\"\u590d\u5236\u4ee3\u7801\" \/><\/a><\/span><\/div>\n<\/div>\n<p>\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n<p>5F20<\/p>\n<p>\u8bf4\u660e\uff1a\u6839\u636e\u7ed3\u679c\u6211\u4eec\u77e5\u9053\u5728\u8fd0\u884c\u65f6JVM\u662f\u4f7f\u7528\u7684utf-16\u683c\u5f0f\u8fdb\u884c\u5b58\u50a8\uff0cutf-16\u4e00\u822c\u662f\u4f7f\u75282\u4e2a\u5b57\u8282\u8fdb\u884c\u5b58\u50a8\uff0c\u5982\u679c\u9047\u5230\u4e24\u4e2a\u5b57\u8282\u65e0\u6cd5\u8868\u793a\u7684\u5b57\u7b26\u5219\u4f1a\u4f7f\u75284\u4e2a\u5b57\u8282\u8868\u793a\u3002\u4e4b\u540e\u4f1a\u53e6\u5916\u6709\u7bc7\u5e45\u8fdb\u884c\u4ecb\u7ecd\uff0c\u5e76\u4e14\u6211\u4eec\u67e5\u770bCharacter\u7c7b\u6e90\u7801\u65f6\uff0c\u4f1a\u53d1\u73b0\u5c31\u662f\u4f7f\u7528\u7684utf-16\u8fdb\u884c\u7f16\u7801\u7684\uff0c\u4ece\u4e24\u9762\u90fd\u627e\u5230\u4e86\u6211\u4eec\u60f3\u8981\u7684\u7b54\u6848\u3002<\/p>\n<p>3. char\u7c7b\u578b\u53ef\u4ee5\u5b58\u653e\u4e2d\u6587\u5417\uff1f<\/p>\n<p>\u6839\u636e\u4e0a\u9762\u7684\u63a2\u7d22\u6211\u4eec\u5df2\u7ecf\u77e5\u9053\u4e86Java\u7684class\u6587\u4ef6\u4e2d\u5b57\u7b26\u662f\u4ee5utf-8\u8fdb\u884c\u7f16\u7801\u7684\uff0c\u5728JVM\u8fd0\u884c\u65f6\u5219\u662f\u4ee5utf-16\u8fdb\u884c\u7f16\u7801\u5b58\u50a8\u7684\u3002\u800c\u5b57\u7b26&#8217;\u5f20&#8217;\u53ef\u4ee5\u7528\u4e24\u4e2a\u5b57\u8282\u6765\u8868\u793a\uff0c\u800cchar\u5728Java\u4e2d\u4e5f\u662f\u4e24\u4e2a\u5b57\u8282\uff0c\u6545\u53ef\u4ee5\u5b58\u653e\u3002<\/p>\n<p><strong>\u56db\u3001\u603b\u7ed3<\/strong><\/p>\n<p>\u7ecf\u8fc7\u4e0a\u9762\u7684\u5206\u6790\uff0c\u6211\u4eec\u77e5\u9053\uff1a<\/p>\n<p>1. \u5b57\u7b26\u5728class\u6587\u4ef6\u4e2d\u662f\u4ee5utf-8\u683c\u5f0f\u8fdb\u884c\u7f16\u7801\u7684\uff0c\u800c\u5728JVM\u8fd0\u884c\u65f6\u662f\u91c7\u7528utf-16\u683c\u5f0f\u8fdb\u884c\u7f16\u7801\u7684\u3002<\/p>\n<p>2. char\u7c7b\u578b\u662f\u4e24\u4e2a\u5b57\u8282\uff0c\u53ef\u4ee5\u7528\u6765\u5b58\u653e\u4e2d\u6587\u3002<\/p>\n<p>\u5728\u6b64\u6b21\u8c03\u7528\u7684\u8fc7\u7a0b\u4e2d\u53c8\u67e5\u9605\u4e86\u597d\u591a\u5173\u4e8e\u5b57\u7b26\u65b9\u9762\u7684\u8d44\u6599\uff0c\u53d7\u76ca\u532a\u6d45\uff0c\u5e76\u4e14\u53d1\u73b0\u7279\u522b\u6709\u610f\u601d\uff0c\u63a5\u4e0b\u6765\u4f1a\u8fdb\u884c\u5206\u4eab\uff0c\u6240\u4ee5\u7279\u6b64\u9884\u544a\u4e0b\u4e00\u7bc7\u5c06\u4f1a\u8fdb\u4e00\u6b65\u6765\u4ecb\u7ecd\u7f16\u7801\u4ee5\u53ca\u7f16\u7801\u5728Java\u4e2d\u7684\u95ee\u9898\u3002\u656c\u8bf7\u671f\u5f85\uff0c\u4e5f\u8c22\u8c22\u5404\u4f4d\u56ed\u53cb\u7684\u89c2\u770b~<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u524d\u8a00 \u5728\u5206\u6790Comparable\u548cComparator\u7684\u65f6\u5019\uff0c\u5206\u6790\u5230\u4e86String\u7c7b\u7684compareTo\u65b9\u6cd5\uff0cString\u5e95\u5c42\u662f\u7528char[]\u6570\u7ec4\u6765\u5b58\u653e\u5143\u7d20\uff0c\u5728\u6bd4\u8f83\u7684\u65f6\u5019\u662f\u6bd4\u8f83\u7684\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\uff0c\u5b57\u7b26\u7528char\u6765\u5b58\u50a8\uff0c\u6b64\u65f6\uff0c\u7a81\u7136\u60f3\u5230\uff0cJava\u91cc\u9762\u7684char\u53ef\u4ee5\u5b58\u653e\u4e2d\u6587\u5417\uff1f\u540e\u6765\u53d1\u73b0\u662f\u53ef\u4ee5\u7684\uff0c\u5e76\u4e14\u7531\u6b64\u4e5f\u5f15\u51fa\u4e86Java\u4e2d\u5b57\u7b26\u7684\u7f16\u7801\u683c\u5f0f\u95ee\u9898\u3002 \u4e8c\u3001Java\u5b58\u50a8\u683c\u5f0f \u5728Java\u4e2d\uff0c\u5982\u4e0b\u4ee3\u7801\u83b7\u53d6\u4e86\u5b57\u7b26&#8217;\u5f20&#8217;\u7684\u5404\u79cd\u7f16\u7801\u683c\u5f0f\u3002 import java.io.UnsupportedEncodingException; public class Test { public static String getCode(String content, String format) throws UnsupportedEncodingException { [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-876","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/posts\/876","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=876"}],"version-history":[{"count":0,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=\/wp\/v2\/posts\/876\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jsjs.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}