{"id":203577,"date":"2025-05-22T08:58:32","date_gmt":"2025-05-22T00:58:32","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203577\/"},"modified":"2025-05-22T08:58:32","modified_gmt":"2025-05-22T00:58:32","slug":"%e5%a6%82%e4%bd%95%e4%bb%8e%e7%bd%91%e9%a1%b5%e4%b8%ad%e6%8f%90%e5%8f%96%e9%9a%90%e8%97%8f%e7%9a%84%e5%9b%be%e7%89%87%e9%aa%8c%e8%af%81%e7%a0%81%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203577\/","title":{"rendered":"\u5982\u4f55\u4ece\u7f51\u9875\u4e2d\u63d0\u53d6\u9690\u85cf\u7684\u56fe\u7247\u9a8c\u8bc1\u7801\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

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<\/p>\n

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\u95ee\u9898\u63cf\u8ff0\uff1a<\/strong><\/p>\n

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\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n

    \n
  1. \u4f7f\u7528 http \u5ba2\u6237\u7aef\u5e93\uff08\u4f8b\u5982 java \u7684 httpclient\uff09\u53d1\u9001\u8bf7\u6c42\u83b7\u53d6\u9875\u9762\u5185\u5bb9\u3002<\/li>\n
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  3. \u68c0\u67e5 http \u54cd\u5e94\u5934\u4e2d\u662f\u5426\u5b58\u5728 cookie \u4fe1\u606f\u3002\u5982\u679c\u5b58\u5728\uff0c\u5219\u5c06\u5176\u6dfb\u52a0\u5230\u540e\u7eed\u8bf7\u6c42\u4e2d\uff0c\u4ee5\u786e\u4fdd\u80fd\u591f\u6210\u529f\u63d0\u53d6\u56fe\u7247\u9a8c\u8bc1\u7801\u3002<\/li>\n
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  5. \u8bc6\u522b\u4fdd\u5b58\u7684\u6587\u4ef6\uff0c\u5c06\u5176\u8bc6\u522b\u4e3a\u56fe\u7247\u3002<\/li>\n<\/ol>\n

    \u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n

    \/\/ \u5bfc\u5165\u5fc5\u8981\u7684\u5e93\nimport org.apache.http.client.HttpClient;\nimport org.apache.http.client.methods.HttpGet;\nimport org.apache.http.impl.client.HttpClientBuilder;\nimport org.apache.http.HttpResponse;\nimport org.apache.http.util.EntityUtils;\n\n\/\/ \u5b9e\u4f8b\u5316 HTTP \u5ba2\u6237\u7aef\nHttpClient client = HttpClientBuilder.create().build();\n\n\/\/ \u8bbe\u7f6e\u8bf7\u6c42 URL\nString url = \"http:\/\/jx.189.cn\/public\/v4\/common\/control\/page\/image.jsp?date=Wed%20May%2029%202019%2010:26:32%20GMT+0800%20(%E4%B8%AD%E5%9B%BD%E6%A0%87%E5%87%86%E6%97%B6%E9%97%B4)\";\n\n\/\/ \u53d1\u9001\u8bf7\u6c42\u5e76\u83b7\u53d6\u54cd\u5e94\nHttpGet request = new HttpGet(url);\nHttpResponse response = client.execute(request);\n\n\/\/ \u68c0\u67e5\u54cd\u5e94\u5934\u4e2d\u662f\u5426\u5b58\u5728 cookie\nString cookie = response.getFirstHeader(\"Set-Cookie\").getValue();\n\n\/\/ \u5982\u679c\u5b58\u5728 cookie\uff0c\u5219\u5c06\u5176\u6dfb\u52a0\u5230\u540e\u7eed\u8bf7\u6c42\u4e2d\nrequest.addHeader(\"Cookie\", cookie);\n\n\/\/ \u518d\u6b21\u53d1\u9001\u8bf7\u6c42\u5e76\u83b7\u53d6\u54cd\u5e94\uff08\u5305\u542b\u9a8c\u8bc1\u7801\u6570\u636e\uff09\nHttpResponse imageResponse = client.execute(request);\n\n\/\/ \u4ece\u54cd\u5e94\u4e2d\u63d0\u53d6\u56fe\u7247\u9a8c\u8bc1\u7801\u6570\u636e\nbyte[] imageData = EntityUtils.toByteArray(imageResponse.getEntity());\n\n\/\/ \u4fdd\u5b58\u56fe\u7247\u9a8c\u8bc1\u7801\u6570\u636e\u5230\u672c\u5730\u6587\u4ef6\nFileOutputStream fos = new FileOutputStream(\"captcha.jpg\");\nfos.write(imageData);\nfos.close();<\/pre>\n
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