{"id":2331,"date":"2022-12-09T14:56:00","date_gmt":"2022-12-09T06:56:00","guid":{"rendered":"https:\/\/qaqaq.top\/?p=2331"},"modified":"2022-12-19T20:43:41","modified_gmt":"2022-12-19T12:43:41","slug":"%e6%96%87%e4%bb%b6%e4%b8%8b%e8%bd%bd-%e6%96%87%e4%bb%b6%e4%b8%8b%e8%bd%bd%e7%9a%84%e5%ae%9e%e7%8e%b0%e3%80%81%e6%96%87%e4%bb%b6%e4%b8%8b%e8%bd%bd-%e4%bd%bf%e7%94%a8urlencoder%e8%a7%a3%e5%86%b3-2","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=2331","title":{"rendered":"\u6587\u4ef6\u4e0b\u8f7d\u529f\u80fd\u6f14\u793a"},"content":{"rendered":"\n<p>\u6587\u4ef6\u4e0b\u8f7d-\u6587\u4ef6\u4e0b\u8f7d\u7684\u5b9e\u73b0\u3001\u6587\u4ef6\u4e0b\u8f7d-\u4f7f\u7528URLEncoder\u89e3\u51b3\u8c37\u6b4c\u548cIE\u6d4f\u89c8\u5668\u4e2d\u6587\u4e0b\u8f7d\u540d\u4e71\u7801\u95ee\u9898\u3001\u6587\u4ef6\u4e0b\u8f7d-Base64\u7f16\u89e3\u7801\u64cd\u4f5c\u3001\u6587\u4ef6\u4e0b\u8f7d-\u4f7f\u7528Base64\u7f16\u89e3\u7801\u89e3\u51b3\u706b\u72d0\u6d4f\u89c8\u5668\u9644\u4ef6\u4e2d\u6587\u4e71\u7801\u95ee\u9898\u3001\u6587\u4ef6\u4e0b\u8f7d-\u4f7f\u7528User-Agent\u8bf7\u6c42\u5934\u5224\u65ad\uff0c\u52a8\u6001\u5207\u6362\u4e0d\u540c\u7684\u65b9\u6848\u89e3\u51b3\u6240\u6709\u6d4f\u89c8\u5668\u9644\u4ef6\u4e2d\u6587\u4e71\u7801\u95ee\u9898<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6587\u4ef6\u4e0b\u8f7d-\u6587\u4ef6\u4e0b\u8f7d\u7684\u5b9e\u73b0\u3001\u6587\u4ef6\u4e0b\u8f7d-\u4f7f\u7528URLEncoder\u89e3\u51b3\u8c37\u6b4c\u548cIE\u6d4f\u89c8\u5668\u4e2d\u6587\u4e0b\u8f7d\u540d\u4e71\u7801\u95ee\u9898\u3001\u6587\u4ef6\u4e0b\u8f7d-\u4f7f\u7528Base64\u7f16\u89e3\u7801\u89e3\u51b3\u706b\u72d0\u6d4f\u89c8\u5668\u9644\u4ef6\u4e2d\u6587\u4e71\u7801\u95ee\u9898\u3001\u6587\u4ef6\u4e0b\u8f7d-\u4f7f\u7528User-Agent\u8bf7\u6c42\u5934\u5224\u65ad\uff0c\u52a8\u6001\u5207\u6362\u4e0d\u540c\u7684\u65b9\u6848\u89e3\u51b3\u6240\u6709\u6d4f\u89c8\u5668\u9644\u4ef6\u4e2d\u6587\u4e71\u7801\u95ee\u9898<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>\u4e0b\u8f7d\u7684\u5e38\u7528 API \u8bf4\u660e\uff1a\nresponse.getOutputStream();\nservletContext.getResourceAsStream();\nservletContext.getMimeType();\nresponse.setContentType();\n\nresponse.setHeader(\"Content-Disposition\", \"attachment; fileName=1.jpg\");\n\u8fd9\u4e2a\u54cd\u5e94\u5934\u544a\u8bc9\u6d4f\u89c8\u5668\u3002\u8fd9\u662f\u9700\u8981\u4e0b\u8f7d\u7684\u3002\u800c attachment \u8868\u793a\u9644\u4ef6\uff0c\u4e5f\u5c31\u662f\u4e0b\u8f7d\u7684\u4e00\u4e2a\u6587\u4ef6\u3002fileName=\u540e\u9762\uff0c\u8868\u793a\u4e0b\u8f7d\u7684\u6587\u4ef6\u540d\u3002\n\n\u5b8c\u6210\u4e0a\u9762\u7684\u4e24\u4e2a\u6b65\u9aa4\uff0c\u4e0b\u8f7d\u6587\u4ef6\u662f\u6ca1\u95ee\u9898\u4e86\u3002\u4f46\u662f\u5982\u679c\u6211\u4eec\u8981\u4e0b\u8f7d\u7684\u6587\u4ef6\u662f\u4e2d\u6587\u540d\u7684\u8bdd\u3002\u4f60\u4f1a\u53d1\u73b0\uff0c\u4e0b\u8f7d\u65e0\u6cd5\u6b63\u786e\u663e\u793a\u51fa\u6b63\u786e\u7684\u4e2d\u6587\u540d\u3002\n\u539f\u56e0\u662f\u5728\u54cd\u5e94\u5934\u4e2d\uff0c\u4e0d\u80fd\u5305\u542b\u6709\u4e2d\u6587\u5b57\u7b26\uff0c\u53ea\u80fd\u5305\u542b ASCII \u7801\u3002<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528URLEncoder\u89e3\u51b3\u6d4f\u89c8\u5668\u4e2d\u9644\u4ef6\u4e2d\u6587\u540d\u95ee\u9898<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>\u5bf9\u4e8e\u5ba2\u6237\u7aef\u6d4f\u89c8\u5668\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528 URLEncoder \u7c7b\u5148\u5bf9\u4e2d\u6587\u540d\u8fdb\u884c UTF-8 \u7684\u7f16\u7801\u64cd\u4f5c\u3002\n\u56e0\u4e3a \u6d4f\u89c8\u5668\u6536\u5230\u542b\u6709\u7f16\u7801\u540e\u7684\u5b57\u7b26\u4e32\u540e\u4f1a\u4ee5 UTF-8 \u5b57\u7b26\u96c6\u8fdb\u884c\u89e3\u7801\u663e\u793a\u3002\n\u6ce8\uff1a\u706b\u72d0\u4e5f\u652f\u6301URL\u7f16\u7801\u5668\u4e86\uff01\n\n\/\/ \u628a\u4e2d\u6587\u540d\u8fdb\u884c UTF-8 \u7f16\u7801\u64cd\u4f5c\u3002\nString str = \"attachment; fileName=\" + URLEncoder.encode(\"\u4e2d\u6587.jpg\", \"UTF-8\");\n\/\/ \u7136\u540e\u628a\u7f16\u7801\u540e\u7684\u5b57\u7b26\u4e32\u8bbe\u7f6e\u5230\u54cd\u5e94\u5934\u4e2d\nresponse.setHeader(\"Content-Disposition\", str);<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">BASE64 \u7f16\u89e3\u7801 \u89e3\u51b3 \u706b\u72d0\u6d4f\u89c8\u5668\u7684\u9644\u4ef6\u4e2d\u6587\u540d\u95ee\u9898 \u5df2\u8fc7\u65f6<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>\u5982\u679c\u5ba2\u6237\u7aef\u6d4f\u89c8\u5668\u662f\u706b\u72d0\u6d4f\u89c8\u5668\u3002 \u90a3\u4e48\u6211\u4eec\u9700\u8981\u5bf9\u4e2d\u6587\u540d\u8fdb\u884c BASE64 \u7684\u7f16\u7801\u64cd\u4f5c\u3002\n\n\u8fd9\u65f6\u5019\u9700\u8981\u628a\u8bf7\u6c42\u5934 Content-Disposition: attachment; filename=\u4e2d\u6587\u540d\n\u7f16\u7801\u6210\u4e3a\uff1aContent-Disposition: attachment; filename==?charset?B?xxxxx?=\n\n=?charset?B?xxxxx?=   \u73b0\u5728\u6211\u4eec\u5bf9\u8fd9\u6bb5\u5185\u5bb9\u8fdb\u884c\u4e00\u4e0b\u8bf4\u660e\u3002\n=?                    \u8868\u793a\u7f16\u7801\u5185\u5bb9\u7684\u5f00\u59cb\ncharset               \u8868\u793a\u5b57\u7b26\u96c6\nB                     \u8868\u793a BASE64 \u7f16\u7801\nxxxx                  \u8868\u793a\u6587\u4ef6\u540d BASE64 \u7f16\u7801\u540e\u7684\u5185\u5bb9\n?=                    \u8868\u793a\u7f16\u7801\u5185\u5bb9\u7684\u7ed3\u675f<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.P217;\n\nimport jakarta.servlet.ServletContext;\nimport jakarta.servlet.ServletException;\nimport jakarta.servlet.http.HttpServlet;\nimport jakarta.servlet.http.HttpServletRequest;\nimport jakarta.servlet.http.HttpServletResponse;\nimport org.apache.commons.io.IOUtils;\n\nimport java.io.IOException;\nimport java.io.InputStream;\nimport java.io.OutputStream;\nimport java.net.URLEncoder;\nimport java.util.Base64;\n\n\/**\n * @author RichieZhang\n * @create 2022-12-09 \u4e0b\u5348 12:26\n *\/\npublic class Download extends HttpServlet {\n\n    @Override\n    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n\/\/        super.doGet(req, resp);\n\n        \/\/ 1. \u83b7\u53d6\u8981\u4e0b\u8f7d\u7684\u6587\u4ef6\u540d\n        String downloadFileName = \"2.jpg\";\n        \/\/ 2. \u83b7\u53d6\u8981\u4e0b\u8f7d\u7684\u6587\u4ef6\u5185\u5bb9\uff08\u901a\u8fc7ServletContext\u5bf9\u8c61\u53ef\u4ee5\u8bfb\u53d6\uff09\n        ServletContext servletContext = getServletContext();\n        \/\/ \u83b7\u53d6\u8981\u4e0b\u8f7d\u7684\u6587\u4ef6\u7c7b\u578b\n        String mimeType = servletContext.getMimeType(\"\/file\/\" + downloadFileName);\n        System.out.println(\"\u4e0b\u8f7d\u7684\u6587\u4ef6\u7c7b\u578b\uff1a\" + mimeType);\n        \/\/ 4. \u5728\u56de\u4f20\u524d\uff0c\u901a\u8fc7\u54cd\u5e94\u5934\u544a\u8bc9\u5ba2\u6237\u7aef\u8fd4\u56de\u7684\u6570\u636e\u7c7b\u578b\n        resp.setContentType(mimeType);\n        \/\/ 5. \u8fd8\u8981\u544a\u8bc9\u5ba2\u6237\u7aef\u6536\u5230\u7684\u6570\u636e\u662f\u7528\u4e8e\u4e0b\u8f7d\u4f7f\u7528\uff08\u8fd8\u662f\u4f7f\u7528\u54cd\u5e94\u5934\uff09\n        \/\/ Content-Disposition\u54cd\u5e94\u5934\uff0c\u8868\u793a\u6536\u5230\u7684\u6570\u636e\u600e\u4e48\u5904\u7406\n        \/\/ attachment\u8868\u793a\u9644\u4ef6\uff0c\u8868\u793a\u4e0b\u8f7d\u4f7f\u7528\n        \/\/ filename= \u8868\u793a\u6307\u5b9a\u4e0b\u8f7d\u7684\u6587\u4ef6\u540d\n        \/\/ url\u7f16\u7801\u662f\u628a\u6c49\u5b57\u8f6c\u6362\u6210\u4e3a%xx%xx\u7684\u683c\u5f0f\n        if (req.getHeader(\"User-Agent\").contains(\"Firefox\")){\n            \/\/ \u5982\u679c\u662f\u706b\u72d0\u6d4f\u89c8\u5668\u4f7f\u7528Base64\u7f16\u7801\n            \/\/ \u706b\u72d0\u6d4f\u89c8\u5668\u5982\u4e0b \u9700\u8981\u4f7f\u7528Base64\u7f16\u7801\u5668\uff1a\n            resp.setHeader(\"Content-Disposition\",\"attachment;filename==?UTF-8?B?\" + Base64.getEncoder().encodeToString(\"\u56fe\u7247.jpg\".getBytes(\"UTF-8\")) + \"?=\");\n        } else {\n            \/\/ \u5982\u679c\u4e0d\u662f\u706b\u72d0\uff0c\u662fIE\u6216\u8c37\u6b4c\uff0c\u4f7f\u7528URL\u7f16\u7801\u64cd\u4f5c\n            \/\/ \u8c37\u6b4c\u6d4f\u89c8\u5668\u5982\u4e0b\uff1a\n            \/\/ 2022\u5e74\u6d4b\u8bd5\u706b\u72d0\u6d4f\u89c8\u5668\u4e5f\u652f\u6301URL\u7f16\u7801\u5668\n            resp.setHeader(\"Content-Disposition\",\"attachment;filename=\" + URLEncoder.encode(\"\u56fe\u7247.jpg\",\"UTF-8\"));\n        }\n        \/*\n        \u659c\u6760\u88ab\u670d\u52a1\u5668\u89e3\u6790\u8868\u793a\u5730\u5740\u4e3ahttp:\/\/ip:port\/\u5de5\u7a0b\u540d\/    \u6620\u5c04 \u5230\u4ee3\u7801\u7684web\u76ee\u5f55\n         *\/\n        InputStream resourceAsStream = servletContext.getResourceAsStream(\"\/file\/\" + downloadFileName);\n        \/\/ \u83b7\u53d6\u54cd\u5e94\u7684\u8f93\u51fa\u6d41\n        OutputStream outputStream = resp.getOutputStream();\n        \/\/ 3. \u628a\u4e0b\u8f7d\u7684\u6587\u4ef6\u5185\u5bb9\u56de\u4f20\u7ed9\u5ba2\u6237\u7aef\n        \/\/ \u8bfb\u53d6\u8f93\u5165\u6d41\u4e2d\u5168\u90e8\u7684\u6570\u636e\uff0c\u590d\u5236\u7ed9\u8f93\u51fa\u6d41\uff0c\u8f93\u51fa\u7ed9\u5ba2\u6237\u7aef\n        IOUtils.copy(resourceAsStream,outputStream);\n\n    }\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>    &lt;servlet&gt;\n        &lt;servlet-name&gt;Download&lt;\/servlet-name&gt;\n        &lt;servlet-class&gt;top.qaqaq.P217.Download&lt;\/servlet-class&gt;\n    &lt;\/servlet&gt;\n    &lt;servlet-mapping&gt;\n        &lt;servlet-name&gt;Download&lt;\/servlet-name&gt;\n        &lt;url-pattern&gt;\/download&lt;\/url-pattern&gt;\n    &lt;\/servlet-mapping&gt;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u6587\u4ef6\u4e0b\u8f7d-Base64\u7f16\u89e3\u7801\u64cd\u4f5c<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.P219;\n\nimport java.io.UnsupportedEncodingException;\nimport java.util.Base64;\n\n\/**\n * @author RichieZhang\n * @create 2022-12-09 \u4e0b\u5348 1:54\n *\/\npublic class Base64Test {\n    public static void main(String&#91;] args) throws UnsupportedEncodingException {\n        String content = \"\u8fd9\u662f\u9700\u8981Base64\u7f16\u7801\u7684\u5185\u5bb9\";\n\n        \/\/ \u521b\u5efa\u4e00\u4e2aBase64\u7f16\u7801\u5668\n        \/\/ jdk1.8\u4e4b\u524d\n        \/\/BASE64Encoder base64Encoder = new BASE64Encoder();\n        \/\/ jdk1.8\u4e4b\u540e\n        Base64.Encoder base64Encoder = Base64.getEncoder();\n\n        \/\/ \u6267\u884cBase64\u7f16\u7801\u64cd\u4f5c\n        \/\/ jdk1.8\u4e4b\u524d\n        \/\/String encodedString = base64Encoder.encode(content.getBytes(\"UTF-8\"));\n        \/\/ jdk1.8\u4e4b\u540e\n        String encodeString = base64Encoder.encodeToString(content.getBytes(\"UTF-8\"));\n\n        System.out.println(encodeString);\n\n        \/\/ \u521b\u5efaBase64\u89e3\u7801\u5668\n        \/\/ jdk1.8\u4e4b\u524d\n        \/\/BASE64Decoder base64Decoder = new BASE64Decoder();\n        \/\/ jdk1.8\u4e4b\u540e\n        Base64.Decoder base64Decoder = Base64.getDecoder();\n\n        \/\/ \u89e3\u7801\u64cd\u4f5c\n        \/\/ jdk1.8\u4e4b\u524d\n        \/\/byte&#91;] bytes = base64Decoder.decodeBuffer(encodedString);\n        \/\/ jdk1.8\u4e4b\u540e\n        byte&#91;] bytes = base64Decoder.decode(encodeString);\n\n        String str = new String(bytes,\"UTF-8\");\n\n        System.out.println(str);\n\n\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u4ef6\u4e0b\u8f7d-\u6587\u4ef6\u4e0b\u8f7d\u7684\u5b9e\u73b0\u3001\u6587\u4ef6\u4e0b\u8f7d-\u4f7f\u7528URLEncoder\u89e3\u51b3\u8c37\u6b4c\u548cIE\u6d4f\u89c8\u5668\u4e2d\u6587\u4e0b\u8f7d\u540d\u4e71\u7801\u95ee\u9898\u3001\u6587\u4ef6\u4e0b\u8f7d- [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[59],"tags":[61],"class_list":["post-2331","post","type-post","status-publish","format-standard","hentry","category-javaweb-code","tag-javaweb"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2331"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2331"}],"version-history":[{"count":2,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2331\/revisions"}],"predecessor-version":[{"id":2713,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2331\/revisions\/2713"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}