\u7db2\u8def\u4e0a\u627e\u5230\u7684\u4e00\u4e9b\u8cc7\u8a0a<\/p>\n
\u6c92\u7d93\u904e\u6574\u7406\u7684\u8cbc\u4f86\u8cbc\u53bb\u800c\u5df2<\/p>\n
\u6240\u4ee5\u5c31\u8b93\u5b83\u6210\u70ba\u79d8\u5bc6\u6587\u7ae0\u5427 <\/p>\n
grep<\/font> Linux\u6307\u5b9a\u5927\u5168 <\/a><\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n \u3000\u3000 7.1 \u72c0\u614b\u4ee3\u78bc\u6982\u8ff0 <\/p>\n \u3000\u3000 Web\u670d\u52d9\u5668\u97ff\u61c9\u700f\u89bd\u5668\u6216\u5176\u4ed6\u5ba2\u6236\u7a0b\u5e8f\u7684\u8acb\u6c42\u6642\uff0c\u5176\u61c9\u7b54\u4e00\u822c\u7531\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\u7d44\u6210\uff1a\u4e00\u500b\u72c0\u614b\u884c\uff0c\u5e7e\u500b\u61c9\u7b54\u982d\uff0c\u4e00\u500b\u7a7a\u884c\uff0c\u5167\u5bb9\u6587\u6a94\u3002\u4e0b\u9762\u662f\u4e00\u500b\u6700\u7c21\u55ae\u7684\u61c9\u7b54\uff1a Hello World <\/p>\n \u3000\u3000 \u72c0\u614b\u884c\u5305\u542bHTTP\u7248\u672c\u3001\u72c0\u614b\u4ee3\u78bc\u3001\u8207\u72c0\u614b\u4ee3\u78bc\u5c0d\u61c9\u7684\u7c21\u77ed\u8aaa\u660e\u4fe1\u606f\u3002\u5728\u5927\u591a\u6578\u60c5\u6cc1\u4e0b\uff0c\u9664\u4e86Content-Type\u4e4b\u5916\u7684\u6240\u6709\u61c9\u7b54\u982d\u90fd\u662f\u53ef\u9078\u7684\u3002\u4f46 Content-Type\u662f\u5fc5\u9700\u7684\uff0c\u5b83\u63cf\u8ff0\u7684\u662f\u5f8c\u9762\u6587\u6a94\u7684MIME\u985e\u578b\u3002\u96d6\u7136\u5927\u591a\u6578\u61c9\u7b54\u90fd\u5305\u542b\u4e00\u500b\u6587\u6a94\uff0c\u4f46\u4e5f\u6709\u4e00\u4e9b\u4e0d\u5305\u542b\uff0c\u4f8b\u5982\u5c0dHEAD\u8acb\u6c42\u7684\u61c9\u7b54\u6c38\u9060 \u4e0d\u6703\u9644\u5e36\u6587\u6a94\u3002\u6709\u8a31\u591a\u72c0\u614b\u4ee3\u78bc\u5be6\u969b\u4e0a\u7528\u4f86\u6a19\u8b58\u4e00\u6b21\u5931\u6557\u7684\u8acb\u6c42\uff0c\u9019\u4e9b\u61c9\u7b54\u4e5f\u4e0d\u5305\u542b\u6587\u6a94\uff08\u6216\u53ea\u5305\u542b\u4e00\u500b\u7c21\u77ed\u7684\u932f\u8aa4\u4fe1\u606f\u8aaa\u660e\uff09\u3002 <\/p>\n \u3000\u3000 Servlet\u53ef\u4ee5\u5229\u7528\u72c0\u614b\u4ee3\u78bc\u4f86\u5be6\u73fe\u8a31\u591a\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u628a\u7528\u6236\u91cd\u5b9a\u5411\u5230\u53e6\u4e00\u500b\u7db2\u7ad9\uff1b\u53ef\u4ee5\u6307\u793a\u51fa\u5f8c\u9762\u7684\u6587\u6a94\u662f\u5716\u7247\u3001PDF\u6587\u4ef6\u6216HTML\u6587\u4ef6\uff1b\u53ef\u4ee5\u544a\u8a34 \u7528\u6236\u5fc5\u9808\u63d0\u4f9b\u5bc6\u78bc\u624d\u80fd\u8a2a\u554f\u6587\u6a94\uff1b\u7b49\u7b49\u3002\u9019\u4e00\u90e8\u5206\u6211\u5011\u5c07\u5177\u9ad4\u8a0e\u8ad6\u5404\u7a2e\u72c0\u614b\u4ee3\u78bc\u7684\u542b\u7fa9\u4ee5\u53ca\u5229\u7528\u9019\u4e9b\u4ee3\u78bc\u53ef\u4ee5\u505a\u4e9b\u4ec0\u9ebc\u3002 <\/p>\n \u3000\u3000 7.2 \u8a2d\u7f6e\u72c0\u614b\u4ee3\u78bc <\/p>\n \u3000\u3000 \u5982\u524d\u6240\u8ff0\uff0cHTTP\u61c9\u7b54\u72c0\u614b\u884c\u5305\u542bHTTP\u7248\u672c\u3001\u72c0\u614b\u4ee3\u78bc\u548c\u5c0d\u61c9\u7684\u72c0\u614b\u4fe1\u606f\u3002\u7531\u65bc\u72c0\u614b\u4fe1\u606f\u76f4\u63a5\u548c\u72c0\u614b\u4ee3\u78bc\u76f8\u95dc\uff0c\u800cHTTP\u7248\u672c\u53c8\u7531\u670d\u52d9\u5668\u78ba\u5b9a\uff0c\u56e0\u6b64\u9700\u8981Servlet\u8a2d\u7f6e\u7684\u53ea\u6709\u4e00\u500b\u72c0\u614b\u4ee3\u78bc\u3002 <\/p>\n \u3000\u3000 Servlet\u8a2d\u7f6e\u72c0\u614b\u4ee3\u78bc\u4e00\u822c\u4f7f\u7528HttpServletResponse\u7684setStatus\u65b9\u6cd5\u3002setStatus\u65b9\u6cd5\u7684\u53c3\u6578\u662f\u4e00\u500b\u6574\u6578\uff08\u5373\u72c0\u614b \u4ee3\u78bc\uff09\uff0c\u4e0d\u904e\u70ba\u4e86\u4f7f\u5f97\u4ee3\u78bc\u5177\u6709\u66f4\u597d\u7684\u53ef\u8b80\u6027\uff0c\u53ef\u4ee5\u7528HttpServletResponse\u4e2d\u5b9a\u7fa9\u7684\u5e38\u91cf\u4f86\u907f\u514d\u76f4\u63a5\u4f7f\u7528\u6574\u6578\u3002\u9019\u4e9b\u5e38\u91cf\u6839\u64daHTTP 1.1\u4e2d\u7684\u6a19\u6e96\u72c0\u614b\u4fe1\u606f\u547d\u540d\uff0c\u6240\u6709\u7684\u540d\u5b57\u90fd\u52a0\u4e0a\u4e86SC\u524d\u7db4\uff08Status Code\u7684\u7e2e\u5beb\uff09\u4e26\u5927\u5beb\uff0c\u540c\u6642\u628a\u7a7a\u683c\u8f49\u63db\u6210\u4e86\u4e0b\u5283\u7dda\u3002\u4e5f\u5c31\u662f\u8aaa\uff0c\u8207\u72c0\u614b\u4ee3\u78bc404\u5c0d\u61c9\u7684\u72c0\u614b\u4fe1\u606f\u662f“Not Found”\uff0c\u5247HttpServletResponse\u4e2d\u7684\u5c0d\u61c9\u5e38\u91cf\u540d\u5b57\u70baSC_NOT_FOUND\u3002\u4f46\u6709\u5169\u500b\u4f8b\u5916\uff1a\u548c\u72c0\u614b\u4ee3\u78bc302\u5c0d\u61c9\u7684\u5e38\u91cf\u6839\u64da HTTP 1.0\u547d\u540d\uff0c\u800c307\u6c92\u6709\u5c0d\u61c9\u7684\u5e38\u91cf\u3002 <\/p>\n \u3000\u3000 \u8a2d\u7f6e\u72c0\u614b\u4ee3\u78bc\u4e26\u975e\u7e3d\u662f\u610f\u5473\u8457\u4e0d\u8981\u518d\u8fd4\u56de\u6587\u6a94\u3002\u4f8b\u5982\uff0c\u96d6\u7136\u5927\u591a\u6578\u670d\u52d9\u5668\u8fd4\u56de404\u61c9\u7b54\u6642\u6703\u8f38\u51fa\u7c21\u55ae\u7684“File Not Found”\u4fe1\u606f\uff0c\u4f46Servlet\u4e5f\u53ef\u4ee5\u5b9a\u5236\u9019\u500b\u61c9\u7b54\u3002\u4e0d\u904e\uff0c\u5b9a\u5236\u61c9\u7b54\u6642\u61c9\u7576\u5728\u901a\u904ePrintWriter\u767c\u9001\u4efb\u4f55\u5167\u5bb9\u4e4b\u524d\u5148\u8abf\u7528 response.setStatus\u3002 <\/p>\n \u3000\u3000 \u96d6\u7136\u8a2d\u7f6e\u72c0\u614b\u4ee3\u78bc\u4e00\u822c\u4f7f\u7528\u7684\u662fresponse.setStauts(int)\u65b9\u6cd5\uff0c\u4f46\u70ba\u4e86\u7c21\u55ae\u8d77\u898b\uff0cHttpServletResponse\u70ba\u5169\u7a2e\u5e38\u898b \u7684\u60c5\u5f62\u63d0\u4f9b\u4e86\u5c08\u7528\u65b9\u6cd5\uff1asendError\u65b9\u6cd5\u751f\u6210\u4e00\u500b404\u61c9\u7b54\uff0c\u540c\u6642\u751f\u6210\u4e00\u500b\u7c21\u77ed\u7684HTML\u932f\u8aa4\u4fe1\u606f\u6587\u6a94\uff1bsendRedirect\u65b9\u6cd5\u751f\u6210\u4e00\u500b 302\u61c9\u7b54\uff0c\u540c\u6642\u5728Location\u982d\u4e2d\u6307\u793a\u65b0\u6587\u6a94\u7684URL\u3002 <\/p>\n \u3000\u3000 7.3 HTTP 1.1\u72c0\u614b\u4ee3\u78bc\u53ca\u5176\u542b\u7fa9 <\/p>\n \u3000\u3000 \u4e0b\u8868\u986f\u793a\u4e86\u5e38\u898b\u7684HTTP 1.1\u72c0\u614b\u4ee3\u78bc\u4ee5\u53ca\u5b83\u5011\u5c0d\u61c9\u7684\u72c0\u614b\u4fe1\u606f\u548c\u542b\u7fa9\u3002 <\/p>\n \u3000\u3000 \u61c9\u7576\u8b39\u614e\u5730\u4f7f\u7528\u90a3\u4e9b\u53ea\u6709HTTP 1.1\u652f\u6301\u7684\u72c0\u614b\u4ee3\u78bc\uff0c\u56e0\u70ba\u8a31\u591a\u700f\u89bd\u5668\u9084\u53ea\u80fd\u5920\u652f\u6301HTTP 1.0\u3002\u5982\u679c\u4f60\u4f7f\u7528\u4e86HTTP 1.1\u7279\u6709\u7684\u72c0\u614b\u4ee3\u78bc\uff0c\u6700\u597d\u80fd\u5920\u6aa2\u67e5\u4e00\u4e0b\u8acb\u6c42\u7684HTTP\u7248\u672c\u865f\uff08\u901a\u904eHttpServletRequest\u7684getProtocol\u65b9\u6cd5\uff09\u3002 \u72c0\u614b\u4ee3\u78bc \u72c0\u614b\u4fe1\u606f \u542b\u7fa9 \u9996\u5148\uff0c\u4ee3\u78bc\u66f4\u52a0\u7c21\u6f54\u3002 \u56b4\u683c\u5730\u8aaa\uff0c\u6211\u5011\u53ea\u80fd\u5047\u5b9a\u53ea\u6709\u7576\u539f\u4f86\u7684\u8acb\u6c42\u662fGET\u6642\u700f\u89bd\u5668\u624d\u6703\u81ea\u52d5\u91cd\u5b9a\u5411\u3002\u8acb\u53c3\u898b307\u3002 <\/p>\n 303 See Other \u985e\u4f3c\u65bc301\/302\uff0c\u4e0d\u540c\u4e4b\u8655\u5728\u65bc\uff0c\u5982\u679c\u539f\u4f86\u7684\u8acb\u6c42\u662fPOST\uff0cLocation\u982d\u6307\u5b9a\u7684\u91cd\u5b9a\u5411\u76ee\u6a19\u6587\u6a94\u61c9\u8a72\u901a\u904eGET\u63d0\u53d6\uff08HTTP 1.1\u65b0\uff09\u3002 400 Bad Request \u8acb\u6c42\u51fa\u73fe\u8a9e\u6cd5\u932f\u8aa4\u3002 \u3000\u3000 7.4 \u5be6\u4f8b\uff1a\u8a2a\u554f\u591a\u500b\u641c\u7d22\u5f15\u64ce <\/p>\n \u3000\u3000 \u4e0b\u9762\u9019\u500b\u4f8b\u5b50\u7528\u5230\u4e86\u9664200\u4e4b\u5916\u7684\u53e6\u5916\u5169\u500b\u5e38\u898b\u72c0\u614b\u4ee3\u78bc\uff1a302\u548c404\u3002302\u901a\u904esendRedirect\u65b9\u6cd5\u8a2d\u7f6e\uff0c404\u901a\u904esendError\u65b9\u6cd5\u8a2d\u7f6e\u3002 <\/p>\n \u3000\u3000 \u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u9996\u5148\u51fa\u73fe\u7684HTML\u8868\u55ae\u7528\u4f86\u9078\u64c7\u641c\u7d22\u5f15\u64ce\u3001\u641c\u7d22\u5b57\u7b26\u4e32\u3001\u6bcf\u9801\u986f\u793a\u7684\u641c\u7d22\u7d50\u679c\u6578\u91cf\u3002\u8868\u55ae\u63d0\u4ea4\u5f8c\uff0cServlet\u63d0\u53d6\u9019\u4e09\u500b\u8b8a\u91cf\uff0c\u6309\u7167\u6240\u9078\u64c7\u7684 \u641c\u7d22\u5f15\u64ce\u7684\u8981\u6c42\u69cb\u9020\u51fa\u5305\u542b\u9019\u4e9b\u8b8a\u91cf\u7684URL\uff0c\u7136\u5f8c\u628a\u7528\u6236\u91cd\u5b9a\u5411\u5230\u9019\u500bURL\u3002\u5982\u679c\u7528\u6236\u4e0d\u80fd\u6b63\u78ba\u5730\u9078\u64c7\u641c\u7d22\u5f15\u64ce\uff0c\u6216\u8005\u5229\u7528\u5176\u4ed6\u8868\u55ae\u767c\u9001\u4e86\u4e00\u500b\u4e0d\u8a8d\u8b58\u7684\u641c\u7d22\u5f15 \u64ce\u540d\u5b57\uff0c\u5247\u8fd4\u56de\u4e00\u500b\u63d0\u793a\u641c\u7d22\u5f15\u64ce\u627e\u4e0d\u5230\u7684404\u9801\u9762\u3002 <\/p>\n \u3000\u3000 SearchEngines.java <\/p>\n \u3000\u3000 \u6ce8\u610f\uff1a\u9019\u500bServlet\u8981\u7528\u5230\u5f8c\u9762\u7d66\u51fa\u7684SearchSpec\u985e\uff0cSearchSpec\u7684\u529f\u80fd\u662f\u69cb\u9020\u9069\u5408\u4e0d\u540c\u641c\u7d22\u5f15\u64ce\u7684URL\u3002 import java.io.*; public class SearchEngines extends HttpServlet { public void doPost(HttpServletRequest request, \u3000\u3000 SearchSpec.java class SearchSpec { private static SearchSpec[] commonSpecs = public SearchSpec(String name, public String makeURL(String searchString, String numResults) { public String getName() { public static SearchSpec[] getCommonSpecs() { \u3000\u3000 SearchEngines.html <\/p>\n \u3000\u3000 \u4e0b\u9762\u662f\u8abf\u7528\u4e0a\u8ff0Servlet\u7684HTML\u8868\u55ae\u3002 \uff1cBODY BGCOLOR="#FDF5E6"\uff1e <\/p>\n \uff1cFORM ACTION="\/servlet\/hall.SearchEngines"\uff1e \uff1c\/BODY\uff1e <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" \u7db2\u8def\u4e0a\u627e\u5230\u7684\u4e00\u4e9b\u8cc7\u8a0a \u6c92\u7d93\u904e\u6574\u7406\u7684\u8cbc\u4f86\u8cbc\u53bb\u800c\u5df2 \u6240\u4ee5\u5c31\u8b93\u5b83\u6210\u70ba\u79d8\u5bc6\u6587\u7ae0\u5427 grep \u641c\u5c0b\u6a94\u6848\u4e2d\u7684\u5b57…<\/span><\/p>\n
\u641c\u5c0b\u6a94\u6848\u4e2d\u7684\u5b57\u4e32<\/font>
\u25ce grep "\u5b57\u4e32" *<\/font> \u641c\u5c0b\u6b64\u5c64\u76ee\u9304\u4e2d\uff0c\u5305\u542b\u300c\u5b57\u4e32<\/font>\u300d\u7684\u6240\u6709\u6a94\u6848\uff0c\u82e5\u300c\u5b57\u4e32<\/font>\u300d\u4e2d\u7684\u82f1\u6587\u5b57\u5143\u5927\u5c0f\u5beb\u4e0d\u540c\uff0c\u5c07\u88ab\u8996\u70ba\u4e0d\u540c<\/font>\u5b57\u4e32
\u25ce grep -i "\u5b57\u4e32" *<\/font> \u641c\u5c0b\u6b64\u5c64\u76ee\u9304\u4e2d\uff0c\u5305\u542b\u300c\u5b57\u4e32<\/font>\u300d\u7684\u6240\u6709\u6a94\u6848\uff0c\u82e5\u300c\u5b57\u4e32<\/font>\u300d\u4e2d\u7684\u82f1\u6587\u5b57\u5143\u5927\u5c0f\u5beb\u4e0d\u540c\uff0c\u5c07\u88ab\u8996\u70ba\u76f8\u540c<\/font>\u5b57\u4e32
\u25ce grep -r "\u5b57\u4e32" .\/<\/font> \u905e\u8ff4\u641c\u5c0b\u6b64\u5c64\u76ee\u9304\u5305\u542b\u5176\u4e0b\u6240\u6709\u5b50\u76ee\u9304\u4e2d\uff0c\u5305\u542b\u300c\u5b57\u4e32<\/font>\u300d\u7684\u6240\u6709\u6a94\u6848\uff0c\u82e5\u300c\u5b57\u4e32<\/font>\u300d\u4e2d\u7684\u82f1\u6587\u5b57\u5143\u5927\u5c0f\u5beb\u4e0d\u540c\uff0c\u5c07\u88ab\u8996\u70ba\u4e0d\u540c\u5b57\u4e32<\/p>\n
HTTP\u61c9\u7b54\u72c0\u614b<\/p>\n
HTTP\/1.1 200 OK
Content-Type: text\/plain <\/p>\n
100 Continue \u521d\u59cb\u7684\u8acb\u6c42\u5df2\u7d93\u63a5\u53d7\uff0c\u5ba2\u6236\u61c9\u7576\u7e7c\u7e8c\u767c\u9001\u8acb\u6c42\u7684\u5176\u9918\u90e8\u5206\u3002\uff08HTTP 1.1\u65b0\uff09
101 Switching Protocols \u670d\u52d9\u5668\u5c07\u9075\u5f9e\u5ba2\u6236\u7684\u8acb\u6c42\u8f49\u63db\u5230\u53e6\u5916\u4e00\u7a2e\u5354\u8b70\uff08HTTP 1.1\u65b0\uff09
200 OK \u4e00\u5207\u6b63\u5e38\uff0c\u5c0dGET\u548cPOST\u8acb\u6c42\u7684\u61c9\u7b54\u6587\u6a94\u8ddf\u5728\u5f8c\u9762\u3002\u5982\u679c\u4e0d\u7528setStatus\u8a2d\u7f6e\u72c0\u614b\u4ee3\u78bc\uff0cServlet\u9ed8\u8a8d\u4f7f\u7528202\u72c0\u614b\u4ee3\u78bc\u3002
201 Created \u670d\u52d9\u5668\u5df2\u7d93\u5275\u5efa\u4e86\u6587\u6a94\uff0cLocation\u982d\u7d66\u51fa\u4e86\u5b83\u7684URL\u3002
202 Accepted \u5df2\u7d93\u63a5\u53d7\u8acb\u6c42\uff0c\u4f46\u8655\u7406\u5c1a\u672a\u5b8c\u6210\u3002
203 Non-Authoritative Information \u6587\u6a94\u5df2\u7d93\u6b63\u5e38\u5730\u8fd4\u56de\uff0c\u4f46\u4e00\u4e9b\u61c9\u7b54\u982d\u53ef\u80fd\u4e0d\u6b63\u78ba\uff0c\u56e0\u70ba\u4f7f\u7528\u7684\u662f\u6587\u6a94\u7684\u62f7\u8c9d\uff08HTTP 1.1\u65b0\uff09\u3002
204 No Content \u6c92\u6709\u65b0\u6587\u6a94\uff0c\u700f\u89bd\u5668\u61c9\u8a72\u7e7c\u7e8c\u986f\u793a\u539f\u4f86\u7684\u6587\u6a94\u3002\u5982\u679c\u7528\u6236\u5b9a\u671f\u5730\u5237\u65b0\u9801\u9762\uff0c\u800cServlet\u53ef\u4ee5\u78ba\u5b9a\u7528\u6236\u6587\u6a94\u8db3\u5920\u65b0\uff0c\u9019\u500b\u72c0\u614b\u4ee3\u78bc\u662f\u5f88\u6709\u7528\u7684\u3002
205 Reset Content \u6c92\u6709\u65b0\u7684\u5167\u5bb9\uff0c\u4f46\u700f\u89bd\u5668\u61c9\u8a72\u91cd\u7f6e\u5b83\u6240\u986f\u793a\u7684\u5167\u5bb9\u3002\u7528\u4f86\u5f37\u5236\u700f\u89bd\u5668\u6e05\u9664\u8868\u55ae\u8f38\u5165\u5167\u5bb9\uff08HTTP 1.1\u65b0\uff09\u3002
206 Partial Content \u5ba2\u6236\u767c\u9001\u4e86\u4e00\u500b\u5e36\u6709Range\u982d\u7684GET\u8acb\u6c42\uff0c\u670d\u52d9\u5668\u5b8c\u6210\u4e86\u5b83\uff08HTTP 1.1\u65b0\uff09\u3002
300 Multiple Choices \u5ba2\u6236\u8acb\u6c42\u7684\u6587\u6a94\u53ef\u4ee5\u5728\u591a\u500b\u4f4d\u7f6e\u627e\u5230\uff0c\u9019\u4e9b\u4f4d\u7f6e\u5df2\u7d93\u5728\u8fd4\u56de\u7684\u6587\u6a94\u5167\u5217\u51fa\u3002\u5982\u679c\u670d\u52d9\u5668\u8981\u63d0\u51fa\u512a\u5148\u9078\u64c7\uff0c\u5247\u61c9\u8a72\u5728Location\u61c9\u7b54\u982d\u6307\u660e\u3002
301 Moved Permanently \u5ba2\u6236\u8acb\u6c42\u7684\u6587\u6a94\u5728\u5176\u4ed6\u5730\u65b9\uff0c\u65b0\u7684URL\u5728Location\u982d\u4e2d\u7d66\u51fa\uff0c\u700f\u89bd\u5668\u61c9\u8a72\u81ea\u52d5\u5730\u8a2a\u554f\u65b0\u7684URL\u3002
302 Found \u985e\u4f3c\u65bc301\uff0c\u4f46\u65b0\u7684URL\u61c9\u8a72\u88ab\u8996\u70ba\u81e8\u6642\u6027\u7684\u66ff\u4ee3\uff0c\u800c\u4e0d\u662f\u6c38\u4e45\u6027\u7684\u3002\u6ce8\u610f\uff0c\u5728HTTP1.0\u4e2d\u5c0d\u61c9\u7684\u72c0\u614b\u4fe1\u606f\u662f“Moved Temporatily”\uff0c\u800cHttpServletResponse\u4e2d\u76f8\u61c9\u7684\u5e38\u91cf\u662fSC_MOVED_TEMPORARILY\uff0c\u800c\u4e0d\u662f SC_FOUND\u3002
\u51fa\u73fe\u8a72\u72c0\u614b\u4ee3\u78bc\u6642\uff0c\u700f\u89bd\u5668\u80fd\u5920\u81ea\u52d5\u8a2a\u554f\u65b0\u7684URL\uff0c\u56e0\u6b64\u5b83\u662f\u4e00\u500b\u5f88\u6709\u7528\u7684\u72c0\u614b\u4ee3\u78bc\u3002\u70ba\u6b64\uff0cServlet\u63d0\u4f9b\u4e86\u4e00\u500b\u5c08\u7528\u7684\u65b9\u6cd5\uff0c\u5373 sendRedirect\u3002\u4f7f\u7528response.sendRedirect(url)\u6bd4\u4f7f\u7528response.setStatus (response.SC_MOVED_TEMPORARILY)\u548cresponse.setHeader("Location",url)\u66f4\u597d\u3002\u9019\u662f\u56e0 \u70ba\uff1a <\/p>\n
\u7b2c\u4e8c\uff0c\u4f7f\u7528sendRedirect\uff0cServlet\u6703\u81ea\u52d5\u69cb\u9020\u4e00\u500b\u5305\u542b\u65b0\u934a\u63a5\u7684\u9801\u9762\uff08\u7528\u65bc\u90a3\u4e9b\u4e0d\u80fd\u81ea\u52d5\u91cd\u5b9a\u5411\u7684\u8001\u5f0f\u700f\u89bd\u5668\uff09\u3002
\u6700\u5f8c\uff0csendRedirect\u80fd\u5920\u8655\u7406\u76f8\u5c0dURL\uff0c\u81ea\u52d5\u628a\u5b83\u5011\u8f49\u63db\u6210\u7d55\u5c0dURL\u3002
\u6ce8\u610f\u9019\u500b\u72c0\u614b\u4ee3\u78bc\u6709\u6642\u5019\u53ef\u4ee5\u548c301\u66ff\u63db\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u5982\u679c\u700f\u89bd\u5668\u932f\u8aa4\u5730\u8acb\u6c42http:\/\/host\/~user\uff08\u7f3a\u5c11\u4e86\u5f8c\u9762\u7684\u659c\u69d3\uff09\uff0c\u6709\u7684\u670d\u52d9\u5668\u8fd4\u56de301\uff0c\u6709\u7684\u5247\u8fd4\u56de302\u3002 <\/a><\/p>\n
304 Not Modified \u5ba2\u6236\u7aef\u6709\u7de9\u885d\u7684\u6587\u6a94\u4e26\u767c\u51fa\u4e86\u4e00\u500b\u689d\u4ef6\u6027\u7684\u8acb\u6c42\uff08\u4e00\u822c\u662f\u63d0\u4f9bIf-Modified-Since\u982d\u8868\u793a\u5ba2\u6236\u53ea\u60f3\u6bd4\u6307\u5b9a\u65e5\u671f\u66f4\u65b0\u7684\u6587\u6a94\uff09\u3002\u670d\u52d9\u5668\u544a\u8a34\u5ba2\u6236\uff0c\u539f\u4f86\u7de9\u885d\u7684\u6587\u6a94\u9084\u53ef\u4ee5\u7e7c\u7e8c\u4f7f\u7528\u3002
305 Use Proxy \u5ba2\u6236\u8acb\u6c42\u7684\u6587\u6a94\u61c9\u8a72\u901a\u904eLocation\u982d\u6240\u6307\u660e\u7684\u4ee3\u7406\u670d\u52d9\u5668\u63d0\u53d6\uff08HTTP 1.1\u65b0\uff09\u3002
307 Temporary Redirect \u548c302\uff08Found\uff09\u76f8\u540c\u3002\u8a31\u591a\u700f\u89bd\u5668\u6703\u932f\u8aa4\u5730\u97ff\u61c9302\u61c9\u7b54\u9032\u884c\u91cd\u5b9a\u5411\uff0c\u5373\u4f7f\u539f\u4f86\u7684\u8acb\u6c42\u662fPOST\uff0c\u5373\u4f7f\u5b83\u5be6\u969b\u4e0a\u53ea\u80fd\u5728POST\u8acb\u6c42\u7684\u61c9\u7b54\u662f303\u6642 \u624d\u80fd\u91cd\u5b9a\u5411\u3002\u7531\u65bc\u9019\u500b\u539f\u56e0\uff0cHTTP 1.1\u65b0\u589e\u4e86307\uff0c\u4ee5\u4fbf\u66f4\u52a0\u6e05\u9664\u5730\u5340\u5206\u5e7e\u500b\u72c0\u614b\u4ee3\u78bc\uff1a\u7576\u51fa\u73fe303\u61c9\u7b54\u6642\uff0c\u700f\u89bd\u5668\u53ef\u4ee5\u8ddf\u96a8\u91cd\u5b9a\u5411\u7684GET\u548cPOST\u8acb\u6c42\uff1b\u5982\u679c\u662f307\u61c9\u7b54\uff0c\u5247\u700f\u89bd\u5668\u53ea \u80fd\u8ddf\u96a8\u5c0dGET\u8acb\u6c42\u7684\u91cd\u5b9a\u5411\u3002
\u6ce8\u610f\uff0cHttpServletResponse\u4e2d\u6c92\u6709\u70ba\u8a72\u72c0\u614b\u4ee3\u78bc\u63d0\u4f9b\u76f8\u61c9\u7684\u5e38\u91cf\u3002\uff08HTTP 1.1\u65b0\uff09 <\/p>\n
401 Unauthorized \u5ba2\u6236\u8a66\u5716\u672a\u7d93\u6388\u6b0a\u8a2a\u554f\u53d7\u5bc6\u78bc\u4fdd\u8b77\u7684\u9801\u9762\u3002\u61c9\u7b54\u4e2d\u6703\u5305\u542b\u4e00\u500bWWW-Authenticate\u982d\uff0c\u700f\u89bd\u5668\u64da\u6b64\u986f\u793a\u7528\u6236\u540d\u5b57\/\u5bc6\u78bc\u5c0d\u8a71\u6846\uff0c\u7136\u5f8c\u5728\u586b\u5beb\u5408\u9069\u7684Authorization\u982d\u5f8c\u518d\u6b21\u767c\u51fa\u8acb\u6c42\u3002
403 Forbidden \u8cc7\u6e90\u4e0d\u53ef\u7528\u3002\u670d\u52d9\u5668\u7406\u89e3\u5ba2\u6236\u7684\u8acb\u6c42\uff0c\u4f46\u62d2\u7d55\u8655\u7406\u5b83\u3002\u901a\u5e38\u7531\u65bc\u670d\u52d9\u5668\u4e0a\u6587\u4ef6\u6216\u76ee\u9304\u7684\u6b0a\u9650\u8a2d\u7f6e\u5c0e\u81f4\u3002
404 Not Found \u7121\u6cd5\u627e\u5230\u6307\u5b9a\u4f4d\u7f6e\u7684\u8cc7\u6e90\u3002\u9019\u4e5f\u662f\u4e00\u500b\u5e38\u7528\u7684\u61c9\u7b54\uff0cHttpServletResponse\u5c08\u9580\u63d0\u4f9b\u4e86\u76f8\u61c9\u7684\u65b9\u6cd5\uff1asendError(message)\u3002
405 Method Not Allowed \u8acb\u6c42\u65b9\u6cd5\uff08GET\u3001POST\u3001HEAD\u3001DELETE\u3001PUT\u3001TRACE\u7b49\uff09\u5c0d\u6307\u5b9a\u7684\u8cc7\u6e90\u4e0d\u9069\u7528\u3002\uff08HTTP 1.1\u65b0\uff09
406 Not Acceptable \u6307\u5b9a\u7684\u8cc7\u6e90\u5df2\u7d93\u627e\u5230\uff0c\u4f46\u5b83\u7684MIME\u985e\u578b\u548c\u5ba2\u6236\u5728Accpet\u982d\u4e2d\u6240\u6307\u5b9a\u7684\u4e0d\u517c\u5bb9\uff08HTTP 1.1\u65b0\uff09\u3002
407 Proxy Authentication Required \u985e\u4f3c\u65bc401\uff0c\u8868\u793a\u5ba2\u6236\u5fc5\u9808\u5148\u7d93\u904e\u4ee3\u7406\u670d\u52d9\u5668\u7684\u6388\u6b0a\u3002\uff08HTTP 1.1\u65b0\uff09
408 Request Timeout \u5728\u670d\u52d9\u5668\u8a31\u53ef\u7684\u7b49\u5f85\u6642\u9593\u5167\uff0c\u5ba2\u6236\u4e00\u76f4\u6c92\u6709\u767c\u51fa\u4efb\u4f55\u8acb\u6c42\u3002\u5ba2\u6236\u53ef\u4ee5\u5728\u4ee5\u5f8c\u91cd\u8907\u540c\u4e00\u8acb\u6c42\u3002\uff08HTTP 1.1\u65b0\uff09
409 Conflict \u901a\u5e38\u548cPUT\u8acb\u6c42\u6709\u95dc\u3002\u7531\u65bc\u8acb\u6c42\u548c\u8cc7\u6e90\u7684\u7576\u524d\u72c0\u614b\u76f8\u885d\u7a81\uff0c\u56e0\u6b64\u8acb\u6c42\u4e0d\u80fd\u6210\u529f\u3002\uff08HTTP 1.1\u65b0\uff09
410 Gone \u6240\u8acb\u6c42\u7684\u6587\u6a94\u5df2\u7d93\u4e0d\u518d\u53ef\u7528\uff0c\u800c\u4e14\u670d\u52d9\u5668\u4e0d\u77e5\u9053\u61c9\u8a72\u91cd\u5b9a\u5411\u5230\u54ea\u4e00\u500b\u5730\u5740\u3002\u5b83\u548c404\u7684\u4e0d\u540c\u5728\u65bc\uff0c\u8fd4\u56de407\u8868\u793a\u6587\u6a94\u6c38\u4e45\u5730\u96e2\u958b\u4e86\u6307\u5b9a\u7684\u4f4d\u7f6e\uff0c\u800c404\u8868\u793a\u7531\u65bc\u672a\u77e5\u7684\u539f\u56e0\u6587\u6a94\u4e0d\u53ef\u7528\u3002\uff08HTTP 1.1\u65b0\uff09
411 Length Required \u670d\u52d9\u5668\u4e0d\u80fd\u8655\u7406\u8acb\u6c42\uff0c\u9664\u975e\u5ba2\u6236\u767c\u9001\u4e00\u500bContent-Length\u982d\u3002\uff08HTTP 1.1\u65b0\uff09
412 Precondition Failed \u8acb\u6c42\u982d\u4e2d\u6307\u5b9a\u7684\u4e00\u4e9b\u524d\u63d0\u689d\u4ef6\u5931\u6557\uff08HTTP 1.1\u65b0\uff09\u3002
413 Request Entity Too Large \u76ee\u6a19\u6587\u6a94\u7684\u5927\u5c0f\u8d85\u904e\u670d\u52d9\u5668\u7576\u524d\u9858\u610f\u8655\u7406\u7684\u5927\u5c0f\u3002\u5982\u679c\u670d\u52d9\u5668\u8a8d\u70ba\u81ea\u5df1\u80fd\u5920\u7a0d\u5f8c\u518d\u8655\u7406\u8a72\u8acb\u6c42\uff0c\u5247\u61c9\u8a72\u63d0\u4f9b\u4e00\u500bRetry-After\u982d\uff08HTTP 1.1\u65b0\uff09\u3002
414 Request URI Too Long URI\u592a\u9577\uff08HTTP 1.1\u65b0\uff09\u3002
416 Requested Range Not Satisfiable \u670d\u52d9\u5668\u4e0d\u80fd\u6eff\u8db3\u5ba2\u6236\u5728\u8acb\u6c42\u4e2d\u6307\u5b9a\u7684Range\u982d\u3002\uff08HTTP 1.1\u65b0\uff09
500 Internal Server Error \u670d\u52d9\u5668\u9047\u5230\u4e86\u610f\u6599\u4e0d\u5230\u7684\u60c5\u6cc1\uff0c\u4e0d\u80fd\u5b8c\u6210\u5ba2\u6236\u7684\u8acb\u6c42\u3002
501 Not Implemented \u670d\u52d9\u5668\u4e0d\u652f\u6301\u5be6\u73fe\u8acb\u6c42\u6240\u9700\u8981\u7684\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u5ba2\u6236\u767c\u51fa\u4e86\u4e00\u500b\u670d\u52d9\u5668\u4e0d\u652f\u6301\u7684PUT\u8acb\u6c42\u3002
502 Bad Gateway \u670d\u52d9\u5668\u4f5c\u70ba\u7db2\u95dc\u6216\u8005\u4ee3\u7406\u6642\uff0c\u70ba\u4e86\u5b8c\u6210\u8acb\u6c42\u8a2a\u554f\u4e0b\u4e00\u500b\u670d\u52d9\u5668\uff0c\u4f46\u8a72\u670d\u52d9\u5668\u8fd4\u56de\u4e86\u975e\u6cd5\u7684\u61c9\u7b54\u3002
503 Service Unavailable \u670d\u52d9\u5668\u7531\u65bc\u7dad\u8b77\u6216\u8005\u8ca0\u8f09\u904e\u91cd\u672a\u80fd\u61c9\u7b54\u3002\u4f8b\u5982\uff0cServlet\u53ef\u80fd\u5728\u6578\u64da\u5eab\u9023\u63a5\u6c60\u5df2\u6eff\u7684\u60c5\u6cc1\u4e0b\u8fd4\u56de503\u3002\u670d\u52d9\u5668\u8fd4\u56de503\u6642\u53ef\u4ee5\u63d0\u4f9b\u4e00\u500bRetry-After\u982d\u3002
504 Gateway Timeout \u7531\u4f5c\u70ba\u4ee3\u7406\u6216\u7db2\u95dc\u7684\u670d\u52d9\u5668\u4f7f\u7528\uff0c\u8868\u793a\u4e0d\u80fd\u53ca\u6642\u5730\u5f9e\u9060\u7a0b\u670d\u52d9\u5668\u7372\u5f97\u61c9\u7b54\u3002\uff08HTTP 1.1\u65b0\uff09
505 HTTP Version Not Supported \u670d\u52d9\u5668\u4e0d\u652f\u6301\u8acb\u6c42\u4e2d\u6240\u6307\u660e\u7684HTTP\u7248\u672c\u3002\uff08HTTP 1.1\u65b0\uff09 <\/p>\n
package hall; <\/p>\n
import javax.servlet.*;
import javax.servlet.http.*;
import java.net.*; <\/p>\n
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
\/\/ getParameter\u81ea\u52d5\u89e3\u78bcURL\u7de8\u78bc\u7684\u67e5\u8a62\u5b57\u7b26\u4e32\u3002\u7531\u65bc\u6211\u5011
\/\/ \u8981\u628a\u67e5\u8a62\u5b57\u7b26\u4e32\u767c\u9001\u7d66\u53e6\u4e00\u500b\u670d\u52d9\u5668\uff0c\u56e0\u6b64\u518d\u6b21\u4f7f\u7528
\/\/ URLEncoder\u9032\u884cURL\u7de8\u78bc
String searchString =
URLEncoder.encode(request.getParameter("searchString"));
String numResults =
request.getParameter("numResults");
String searchEngine =
request.getParameter("searchEngine");
SearchSpec[] commonSpecs = SearchSpec.getCommonSpecs();
for(int i=0; i\uff1ccommonSpecs.length; i++) {
SearchSpec searchSpec = commonSpecs[i];
if (searchSpec.getName().equals(searchEngine)) {
String url =
response.encodeURL(searchSpec.makeURL(searchString,
numResults));
response.sendRedirect(url);
return;
}
}
response.sendError(response.SC_NOT_FOUND,
"No recognized search engine specified.");
} <\/p>\n
HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
} <\/p>\n
package hall; <\/p>\n
private String name, baseURL, numResultsSuffix; <\/p>\n
{ new SearchSpec("google",
"http:\/\/www.google.com\/search?q=", <\/a>
"&num="),
new SearchSpec("infoseek",
"http:\/\/infoseek.go.com\/Titles?qt=", <\/a>
"&nh="),
new SearchSpec("lycos",
"http:\/\/lycospro.lycos.com\/cgi-bin\/pursuit?query=", <\/a>
"&maxhits="),
new SearchSpec("hotbot",
"http:\/\/www.hotbot.com\/?MT=", <\/a>
"&DC=")
}; <\/p>\n
String baseURL,
String numResultsSuffix) {
this.name = name;
this.baseURL = baseURL;
this.numResultsSuffix = numResultsSuffix;
} <\/p>\n
return(baseURL + searchString + numResultsSuffix + numResults);
} <\/p>\n
return(name);
} <\/p>\n
return(commonSpecs);
}
} <\/p>\n
\uff1c!DOCTYPE HTML PUBLIC "-\/\/W3C\/\/DTD HTML 4.0 Transitional\/\/EN"\uff1e
\uff1cHTML\uff1e
\uff1cHEAD\uff1e
\uff1cTITLE\uff1e\u8a2a\u554f\u591a\u500b\u641c\u7d22\u5f15\u64ce\uff1c\/TITLE\uff1e
\uff1c\/HEAD\uff1e <\/p>\n
\uff1cCENTER\uff1e
\u641c\u7d22\u95dc\u9375\u5b57:
\uff1cINPUT TYPE="TEXT" NAME="searchString"\uff1e\uff1cBR\uff1e
\u6bcf\u9801\u986f\u793a\u5e7e\u500b\u67e5\u8a62\u7d50\u679c:
\uff1cINPUT TYPE="TEXT" NAME="numResults"
VALUE=10 SIZE=3\uff1e\uff1cBR\uff1e
\uff1cINPUT TYPE="RADIO" NAME="searchEngine"
VALUE="google"\uff1e
Google |
\uff1cINPUT TYPE="RADIO" NAME="searchEngine"
VALUE="infoseek"\uff1e
Infoseek |
\uff1cINPUT TYPE="RADIO" NAME="searchEngine"
VALUE="lycos"\uff1e
Lycos |
\uff1cINPUT TYPE="RADIO" NAME="searchEngine"
VALUE="hotbot"\uff1e
HotBot
\uff1cBR\uff1e
\uff1cINPUT TYPE="SUBMIT" VALUE="Search"\uff1e
\uff1c\/CENTER\uff1e
\uff1c\/FORM\uff1e <\/p>\n
\uff1c\/HTML\uff1e <\/font><\/p>\n
\n