{"id":2171,"date":"2022-12-05T21:34:08","date_gmt":"2022-12-05T13:34:08","guid":{"rendered":"https:\/\/qaqaq.top\/?p=2171"},"modified":"2022-12-19T20:36:11","modified_gmt":"2022-12-19T12:36:11","slug":"servlet-httpservletrequest%e7%b1%bb%e7%9a%84%e4%bb%8b%e7%bb%8d%e3%80%81servlet-%e8%af%b7%e6%b1%82%e8%bd%ac%e5%8f%91%e3%80%81servlet-base%e6%a0%87%e7%ad%be%e7%9a%84%e4%bd%9c%e7%94%a8%e3%80%81servlet","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=2171","title":{"rendered":"Servlet-HttpServletRequest\u7c7b\u7684\u4ecb\u7ecd\u3001Request\u8bf7\u6c42\u8f6c\u53d1\u3001base\u6807\u7b7e\u7684\u4f5c\u7528\u3001\u56de\u987ejavaweb\u4e2d\u7684\u8def\u5f84\u3001\u659c\u6760\u5728web\u4e2d\u7684\u4e0d\u540c\u610f\u4e49\u3001HttpServletResponse\u7c7b\u7684\u4ecb\u7ecd\u3001\u4e24\u4e2a\u54cd\u5e94\u6d41\u7684\u4ecb\u7ecd\u3001Response\u8bf7\u6c42\u91cd\u5b9a\u5411\u3001\u8bf7\u6c42\u91cd\u5b9a\u5411\u7b2c\u4e8c\u79cd\u5b9e\u73b0\u65b9\u6848"},"content":{"rendered":"\n

07-Servlet2<\/h1>\n\n\n\n

1.HttpServletRequest \u7c7b<\/h2>\n\n\n\n
a)HttpServletRequest \u7c7b\u6709\u4ec0\u4e48\u4f5c\u7528\u3002\n\n\u6bcf\u6b21\u53ea\u8981\u6709\u8bf7\u6c42\u8fdb\u5165 Tomcat \u670d\u52a1\u5668\uff0cTomcat \u670d\u52a1\u5668\u5c31\u4f1a\u628a\u8bf7\u6c42\u8fc7\u6765\u7684 HTTP \u534f\u8bae\u4fe1\u606f\u89e3\u6790\u597d\u5c01\u88c5\u5230 Request \u5bf9\u8c61\u4e2d\u3002\n\u7136\u540e\u4f20\u9012\u5230 service \u65b9\u6cd5\uff08doGet \u548c doPost\uff09\u4e2d\u7ed9\u6211\u4eec\u4f7f\u7528\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 HttpServletRequest \u5bf9\u8c61\uff0c\u83b7\u53d6\u5230\u6240\u6709\u8bf7\u6c42\u7684\n\u4fe1\u606f\u3002<\/code><\/pre>\n\n\n\n
b)HttpServletRequest \u7c7b\u7684\u5e38\u7528\u65b9\u6cd5\n\ni. getRequestURI()\n\u83b7\u53d6\u8bf7\u6c42\u7684\u8d44\u6e90\u8def\u5f84\n\nii. getRequestURL()\n\u83b7\u53d6\u8bf7\u6c42\u7684\u7edf\u4e00\u8d44\u6e90\u5b9a\u4f4d\u7b26\uff08\u7edd\u5bf9\u8def\u5f84\uff09\n\niii. getRemoteHost()\n\u83b7\u53d6\u5ba2\u6237\u7aef\u7684 ip \u5730\u5740\n\niv. getHeader()\n\u83b7\u53d6\u8bf7\u6c42\u5934\n\nv. getParameter()\n\u83b7\u53d6\u8bf7\u6c42\u7684\u53c2\u6570\n\nvi. getParameterValues()\n\u83b7\u53d6\u8bf7\u6c42\u7684\u53c2\u6570\uff08\u591a\u4e2a\u503c\u7684\u65f6\u5019\u4f7f\u7528\uff09\n\nvii. getMethod()\n\u83b7\u53d6\u8bf7\u6c42\u7684\u65b9\u5f0f GET \u6216 POST\n\nviii. setAttribute(key, value); \n\u8bbe\u7f6e\u57df\u6570\u636e\n\nix. getAttribute(key);\n\u83b7\u53d6\u57df\u6570\u636e\n\nx. getRequestDispatcher()\n\u83b7\u53d6\u8bf7\u6c42\u8f6c\u53d1\u5bf9\u8c61<\/code><\/pre>\n\n\n\n
doGet \u8bf7\u6c42\u7684\u4e2d\u6587\u4e71\u7801\u89e3\u51b3\uff1a<\/p>\n\n\n\n
\/\/ \u83b7\u53d6\u8bf7\u6c42\u53c2\u6570\nString username = req.getParameter(\"username\");\n\/\/1 \u5148\u4ee5 iso8859-1 \u8fdb\u884c\u7f16\u7801\n\/\/2 \u518d\u4ee5 utf-8 \u8fdb\u884c\u89e3\u7801\nusername = new String(username.getBytes(\"iso-8859-1\"), \"UTF-8\");<\/code><\/pre>\n\n\n\n
doPost \u8bf7\u6c42\u7684\u4e2d\u6587\u4e71\u7801\u89e3\u51b3<\/p>\n\n\n\n
@Override\nprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException,\nIOException {\n\/\/ \u8bbe\u7f6e\u8bf7\u6c42\u4f53\u7684\u5b57\u7b26\u96c6\u4e3a UTF-8\uff0c\u4ece\u800c\u89e3\u51b3 post \u8bf7\u6c42\u7684\u4e2d\u6587\u4e71\u7801\u95ee\u9898\nreq.setCharacterEncoding(\"UTF-8\");\nSystem.out.println(\"-------------doPost------------\");\n\/\/ \u83b7\u53d6\u8bf7\u6c42\u53c2\u6570\nString username = req.getParameter(\"username\");\nString password = req.getParameter(\"password\");\nString[] hobby = req.getParameterValues(\"hobby\");\nSystem.out.println(\"\u7528\u6237\u540d\uff1a\" + username);\nSystem.out.println(\"\u5bc6\u7801\uff1a\" + password);\nSystem.out.println(\"\u5174\u8da3\u7231\u597d\uff1a\" + Arrays.asList(hobby));<\/code><\/pre>\n\n\n\n
e)\u8bf7\u6c42\u7684\u8f6c\u53d1\n\u4ec0\u4e48\u662f\u8bf7\u6c42\u7684\u8f6c\u53d1?\n\u8bf7\u6c42\u8f6c\u53d1\u662f\u6307\uff0c\u670d\u52a1\u5668\u6536\u5230\u8bf7\u6c42\u540e\uff0c\u4ece\u4e00\u6b21\u8d44\u6e90\u8df3\u8f6c\u5230\u53e6\u4e00\u4e2a\u8d44\u6e90\u7684\u64cd\u4f5c\u53eb\u8bf7\u6c42\u8f6c\u53d1\u3002<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
f) base \u6807\u7b7e\u7684\u4f5c\u7528<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
g)Web \u4e2d\u7684\u76f8\u5bf9\u8def\u5f84\u548c\u7edd\u5bf9\u8def\u5f84\n\n\u5728 javaWeb \u4e2d\uff0c\u8def\u5f84\u5206\u4e3a\u76f8\u5bf9\u8def\u5f84\u548c\u7edd\u5bf9\u8def\u5f84\u4e24\u79cd\uff1a\n\u76f8\u5bf9\u8def\u5f84\u662f\uff1a\n.           \u8868\u793a\u5f53\u524d\u76ee\u5f55\n..          \u8868\u793a\u4e0a\u4e00\u7ea7\u76ee\u5f55\n\u8d44\u6e90\u540d      \u8868\u793a\u5f53\u524d\u76ee\u5f55\/\u8d44\u6e90\u540d\n\n\u7edd\u5bf9\u8def\u5f84\uff1a\nhttp://ip:port\/\u5de5\u7a0b\u8def\u5f84\/\u8d44\u6e90\u8def\u5f84\n\n\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u8def\u5f84\u90fd\u4f7f\u7528\u7edd\u5bf9\u8def\u5f84\uff0c\u800c\u4e0d\u7b80\u5355\u7684\u4f7f\u7528\u76f8\u5bf9\u8def\u5f84\u3002\n1\u3001\u7edd\u5bf9\u8def\u5f84\n2\u3001base+\u76f8\u5bf9<\/code><\/pre>\n\n\n\n
h)web \u4e2d \/ \u659c\u6760\u7684\u4e0d\u540c\u610f\u4e49\n\n\u5728 web \u4e2d \/ \u659c\u6760 \u662f\u4e00\u79cd\u7edd\u5bf9\u8def\u5f84\u3002\n\n\/ \u659c\u6760 \u5982\u679c\u88ab\u6d4f\u89c8\u5668\u89e3\u6790\uff0c\u5f97\u5230\u7684\u5730\u5740\u662f\uff1ahttp:\/\/ip:port\/\n\n<a href=\"\/\">\u659c\u6760<\/a>\n\n\/ \u659c\u6760 \u5982\u679c\u88ab\u670d\u52a1\u5668\u89e3\u6790\uff0c\u5f97\u5230\u7684\u5730\u5740\u662f\uff1ahttp:\/\/ip:port\/\u5de5\u7a0b\u8def\u5f84\n1\u3001<url-pattern>\/servlet1<\/url-pattern>\n2\u3001servletContext.getRealPath(\u201c\/\u201d);\n3\u3001request.getRequestDispatcher(\u201c\/\u201d);\n\n\u7279\u6b8a\u60c5\u51b5\uff1a response.sendRediect(\u201c\/\u201d); \u628a\u659c\u6760\u53d1\u9001\u7ed9\u6d4f\u89c8\u5668\u89e3\u6790\u3002\u5f97\u5230 http:\/\/ip:port\/<\/code><\/pre>\n\n\n\n
2.HttpServletResponse \u7c7b<\/h2>\n\n\n\n
a)HttpServletResponse \u7c7b\u7684\u4f5c\u7528\n\nHttpServletResponse \u7c7b\u548c HttpServletRequest \u7c7b\u4e00\u6837\u3002\u6bcf\u6b21\u8bf7\u6c42\u8fdb\u6765\uff0cTomcat \u670d\u52a1\u5668\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a Response \u5bf9\u8c61\u4f20\u9012\u7ed9 Servlet \u7a0b\u5e8f\u53bb\u4f7f\u7528\u3002HttpServletRequest \u8868\u793a\u8bf7\u6c42\u8fc7\u6765\u7684\u4fe1\u606f\uff0cHttpServletResponse \u8868\u793a\u6240\u6709\u54cd\u5e94\u7684\u4fe1\u606f\uff0c\n\n\u6211\u4eec\u5982\u679c\u9700\u8981\u8bbe\u7f6e\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u7684\u4fe1\u606f\uff0c\u90fd\u53ef\u4ee5\u901a\u8fc7 HttpServletResponse \u5bf9\u8c61\u6765\u8fdb\u884c\u8bbe\u7f6e<\/code><\/pre>\n\n\n\n
b)\u4e24\u4e2a\u8f93\u51fa\u6d41\u7684\u8bf4\u660e\u3002\n\n\u5b57\u8282\u6d41     getOutputStream();    \u5e38\u7528\u4e8e\u4e0b\u8f7d\uff08\u4f20\u9012\u4e8c\u8fdb\u5236\u6570\u636e\uff09\n\u5b57\u7b26\u6d41     getWriter();          \u5e38\u7528\u4e8e\u56de\u4f20\u5b57\u7b26\u4e32\uff08\u5e38\u7528\uff09\n\n\u4e24\u4e2a\u6d41\u540c\u65f6\u53ea\u80fd\u4f7f\u7528\u4e00\u4e2a\u3002\n\u4f7f\u7528\u4e86\u5b57\u8282\u6d41\uff0c\u5c31\u4e0d\u80fd\u518d\u4f7f\u7528\u5b57\u7b26\u6d41\uff0c\u53cd\u4e4b\u4ea6\u7136\uff0c\u5426\u5219\u5c31\u4f1a\u62a5\u9519\u3002<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
c)\u5982\u4f55\u5f80\u5ba2\u6237\u7aef\u56de\u4f20\u6570\u636e\n\n\u8981\u6c42 \uff1a \u5f80\u5ba2\u6237\u7aef\u56de\u4f20 \u5b57\u7b26\u4e32 \u6570\u636e\u3002<\/code><\/pre>\n\n\n\n
public class ResponseIOServlet extends HttpServlet {\n@Override\nprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException,\nIOException {\n\/\/\n\u8981\u6c42 \uff1a \u5f80\u5ba2\u6237\u7aef\u56de\u4f20 \u5b57\u7b26\u4e32 \u6570\u636e\u3002\nPrintWriter writer = resp.getWriter();\nwriter.write(\"response's content!!!\");\n}\n}<\/code><\/pre>\n\n\n\n
d)\u54cd\u5e94\u7684\u4e71\u7801\u89e3\u51b3<\/code><\/pre>\n\n\n\n
\u89e3\u51b3\u54cd\u5e94\u4e2d\u6587\u4e71\u7801\u65b9\u6848\u4e00\uff08\u4e0d\u63a8\u8350\u4f7f\u7528\uff09\uff1a<\/p>\n\n\n\n
\/\/ \u8bbe\u7f6e\u670d\u52a1\u5668\u5b57\u7b26\u96c6\u4e3a UTF-8\nresp.setCharacterEncoding(\"UTF-8\");\n\/\/ \u901a\u8fc7\u54cd\u5e94\u5934\uff0c\u8bbe\u7f6e\u6d4f\u89c8\u5668\u4e5f\u4f7f\u7528 UTF-8 \u5b57\u7b26\u96c6\nresp.setHeader(\"Content-Type\", \"text\/html; charset=UTF-8\");<\/code><\/pre>\n\n\n\n
\u89e3\u51b3\u54cd\u5e94\u4e2d\u6587\u4e71\u7801\u65b9\u6848\u4e8c\uff08\u63a8\u8350\uff09\uff1a<\/p>\n\n\n\n
\/\/ \u5b83\u4f1a\u540c\u65f6\u8bbe\u7f6e\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u90fd\u4f7f\u7528 UTF-8 \u5b57\u7b26\u96c6\uff0c\u8fd8\u8bbe\u7f6e\u4e86\u54cd\u5e94\u5934\n\/\/ \u6b64\u65b9\u6cd5\u4e00\u5b9a\u8981\u5728\u83b7\u53d6\u6d41\u5bf9\u8c61\u4e4b\u524d\u8c03\u7528\u624d\u6709\u6548\nresp.setContentType(\"text\/html; charset=UTF-8\");<\/code><\/pre>\n\n\n\n
e)\u8bf7\u6c42\u91cd\u5b9a\u5411\n\n\u8bf7\u6c42\u91cd\u5b9a\u5411\uff0c\u662f\u6307\u5ba2\u6237\u7aef\u7ed9\u670d\u52a1\u5668\u53d1\u8bf7\u6c42\uff0c\u7136\u540e\u670d\u52a1\u5668\u544a\u8bc9\u5ba2\u6237\u7aef\u8bf4\u3002\u6211\u7ed9\u4f60\u4e00\u4e9b\u5730\u5740\u3002\u4f60\u53bb\u65b0\u5730\u5740\u8bbf\u95ee\u3002\u53eb\u8bf7\u6c42\n\u91cd\u5b9a\u5411\uff08\u56e0\u4e3a\u4e4b\u524d\u7684\u5730\u5740\u53ef\u80fd\u5df2\u7ecf\u88ab\u5e9f\u5f03\uff09\u3002<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u8bf7\u6c42\u91cd\u5b9a\u5411\u7684\u7b2c\u4e00\u79cd\u65b9\u6848\uff1a\n\/\/ \u8bbe\u7f6e\u54cd\u5e94\u72b6\u6001\u7801 302 \uff0c\u8868\u793a\u91cd\u5b9a\u5411\uff0c\uff08\u5df2\u642c\u8fc1\uff09\nresp.setStatus(302);\n\/\/ \u8bbe\u7f6e\u54cd\u5e94\u5934\uff0c\u8bf4\u660e \u65b0\u7684\u5730\u5740\u5728\u54ea\u91cc\nresp.setHeader(\"Location\", \"http:\/\/localhost:8080\");\n\n\u8bf7\u6c42\u91cd\u5b9a\u5411\u7684\u7b2c\u4e8c\u79cd\u65b9\u6848\uff08\u63a8\u8350\u4f7f\u7528\uff09\uff1a\nresp.sendRedirect(\"http:\/\/localhost:8080\");<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
07-Servlet2 1.HttpServletRequest \u7c7b doGet \u8bf7\u6c42\u7684\u4e2d\u6587\u4e71\u7801\u89e3\u51b3\uff1a doP […]<\/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-2171","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\/2171"}],"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=2171"}],"version-history":[{"count":2,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2171\/revisions"}],"predecessor-version":[{"id":2700,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2171\/revisions\/2700"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2171"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}