{"id":2153,"date":"2022-12-05T15:49:41","date_gmt":"2022-12-05T07:49:41","guid":{"rendered":"https:\/\/qaqaq.top\/?p=2153"},"modified":"2022-12-19T20:35:19","modified_gmt":"2022-12-19T12:35:19","slug":"servlet-servletcontext%e5%af%b9%e8%b1%a1%e7%9a%84%e4%bb%8b%e7%bb%8d%e3%80%81servlet-servletcontext%e5%af%b9%e8%b1%a1%e4%bd%9c%e7%94%a8%e7%9a%84%e6%bc%94%e7%a4%ba%e3%80%81servlet-servletcontext","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=2153","title":{"rendered":"Servlet-ServletContext\u5bf9\u8c61\u7684\u4ecb\u7ecd\u3001ServletContext\u50cfmap\u4e00\u6837\u5b58\u53d6\u6570\u636e\u3001\u4ec0\u4e48\u662fHTTP\u534f\u8bae\u3001GET\u8bf7\u6c42HTTP\u534f\u8bae\u5185\u5bb9\u4ecb\u7ecd\u3001POST\u8bf7\u6c42HTTP\u534f\u8bae\u5185\u5bb9\u4ecb\u7ecd\u3001\u5e38\u7528\u8bf7\u6c42\u5934\u3001\u54ea\u4e9b\u662fGET\u8bf7\u6c42\uff0c\u54ea\u4e9b\u662fPOST\u8bf7\u6c42\u3001\u54cd\u5e94\u7684HTTP\u534f\u8bae\u4ecb\u7ecd\u3001\u5e38\u89c1\u7684\u54cd\u5e94\u72b6\u6001\u7801\u8bf4\u660e\u3001MIME\u6570\u636e\u7c7b\u578b\u3001\u8c37\u6b4c\u6d4f\u89c8\u5668\u548c\u706b\u72d0\u6d4f\u89c8\u5668\u5982\u4f55\u67e5\u770bHTTP\u534f\u8bae"},"content":{"rendered":"\n

06-Servlet<\/h1>\n\n\n\n

3.ServletContext \u7c7b<\/h2>\n\n\n\n
a)\u4ec0\u4e48\u662f ServletContext?\n\n1\u3001ServletContext \u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u5b83\u8868\u793a Servlet \u4e0a\u4e0b\u6587\u5bf9\u8c61\n2\u3001\u4e00\u4e2a web \u5de5\u7a0b\uff0c\u53ea\u6709\u4e00\u4e2a ServletContext \u5bf9\u8c61\u5b9e\u4f8b\u3002\n3\u3001ServletContext \u5bf9\u8c61\u662f\u4e00\u4e2a\u57df\u5bf9\u8c61\u3002\n4\u3001ServletContext \u662f\u5728 web \u5de5\u7a0b\u90e8\u7f72\u542f\u52a8\u7684\u65f6\u5019\u521b\u5efa\u3002\u5728 web \u5de5\u7a0b\u505c\u6b62\u7684\u65f6\u5019\u9500\u6bc1\u3002\n<\/code><\/pre>\n\n\n\n
\u4ec0\u4e48\u662f\u57df\u5bf9\u8c61?\n\u57df\u5bf9\u8c61\uff0c\u662f\u53ef\u4ee5\u50cf Map \u4e00\u6837\u5b58\u53d6\u6570\u636e\u7684\u5bf9\u8c61\uff0c\u53eb\u57df\u5bf9\u8c61\u3002\n\u8fd9\u91cc\u7684\u57df\u6307\u7684\u662f\u5b58\u53d6\u6570\u636e\u7684\u64cd\u4f5c\u8303\u56f4\uff0c\u6574\u4e2a web \u5de5\u7a0b\u3002\n<\/code><\/pre>\n\n\n\n
                  \u5b58\u6570\u636e            \u53d6\u6570\u636e             \u5220\u9664 \u6570\u636e\nMap               put()             get()             remove()\n\u57df\u5bf9\u8c61            setAttribute()    getAttribute()     removeAttribute();<\/code><\/pre>\n\n\n\n
b)ServletContext \u7c7b\u7684\u56db\u4e2a\u4f5c\u7528\n\n1\u3001\u83b7\u53d6 web.xml \u4e2d\u914d\u7f6e\u7684\u4e0a\u4e0b\u6587\u53c2\u6570 context-param\n2\u3001\u83b7\u53d6\u5f53\u524d\u7684\u5de5\u7a0b\u8def\u5f84\uff0c\u683c\u5f0f: \/\u5de5\u7a0b\u8def\u5f84\n3\u3001\u83b7\u53d6\u5de5\u7a0b\u90e8\u7f72\u540e\u5728\u670d\u52a1\u5668\u786c\u76d8\u4e0a\u7684\u7edd\u5bf9\u8def\u5f84\n4\u3001\u50cf Map \u4e00\u6837\u5b58\u53d6\u6570\u636e<\/code><\/pre>\n\n\n\n
4.HTTP \u534f\u8bae<\/h2>\n\n\n\n
a)\u4ec0\u4e48\u662f HTTP \u534f\u8bae\n\n\u4ec0\u4e48\u662f\u534f\u8bae?\n\u534f\u8bae\u662f\u6307\u53cc\u65b9\uff0c\u6216\u591a\u65b9\uff0c\u76f8\u4e92\u7ea6\u5b9a\u597d\uff0c\u5927\u5bb6\u90fd\u9700\u8981\u9075\u5b88\u7684\u89c4\u5219\uff0c\u53eb\u534f\u8bae\u3002\n\n\u6240\u8c13 HTTP \u534f\u8bae\uff0c\u5c31\u662f\u6307\uff0c\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u901a\u4fe1\u65f6\uff0c\u53d1\u9001\u7684\u6570\u636e\uff0c\u9700\u8981\u9075\u5b88\u7684\u89c4\u5219\uff0c\u53eb HTTP \u534f\u8bae\u3002\n\nHTTP \u534f\u8bae\u4e2d\u7684\u6570\u636e\u53c8\u53eb\u62a5\u6587\u3002<\/code><\/pre>\n\n\n\n
b)\u8bf7\u6c42\u7684 HTTP \u534f\u8bae\u683c\u5f0f\n\n\u5ba2\u6237\u7aef\u7ed9\u670d\u52a1\u5668\u53d1\u9001\u6570\u636e\u53eb\u8bf7\u6c42\u3002\n\u670d\u52a1\u5668\u7ed9\u5ba2\u6237\u7aef\u56de\u4f20\u6570\u636e\u53eb\u54cd\u5e94\u3002\n\n\u8bf7\u6c42\u53c8\u5206\u4e3a GET \u8bf7\u6c42\uff0c\u548c POST \u8bf7\u6c42\u4e24\u79cd<\/code><\/pre>\n\n\n\n
i. GET \u8bf7\u6c42<\/p>1\u3001\u8bf7\u6c42\u884c
(1) \u8bf7\u6c42\u7684\u65b9\u5f0f          GET
(2) \u8bf7\u6c42\u7684\u8d44\u6e90\u8def\u5f84[+?+\u8bf7\u6c42\u53c2\u6570]
(3) \u8bf7\u6c42\u7684\u534f\u8bae\u7684\u7248\u672c\u53f7           HTTP\/1.1

2\u3001\u8bf7\u6c42\u5934
key : value \u7ec4\u6210 \u4e0d\u540c\u7684\u952e\u503c\u5bf9\uff0c\u8868\u793a\u4e0d\u540c\u7684\u542b\u4e49\u3002<\/cite><\/blockquote>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
ii. POST \u8bf7\u6c42<\/p>1\u3001\u8bf7\u6c42\u884c
(1) \u8bf7\u6c42\u7684\u65b9\u5f0f             POST
(2) \u8bf7\u6c42\u7684\u8d44\u6e90\u8def\u5f84[+?+\u8bf7\u6c42\u53c2\u6570]
(3) \u8bf7\u6c42\u7684\u534f\u8bae\u7684\u7248\u672c\u53f7               HTTP\/1.1

2\u3001\u8bf7\u6c42\u5934
1) key : value              \u4e0d\u540c\u7684\u8bf7\u6c42\u5934\uff0c\u6709\u4e0d\u540c\u7684\u542b\u4e49

\u7a7a\u884c

3\u3001\u8bf7\u6c42\u4f53 ===>>> \u5c31\u662f\u53d1\u9001\u7ed9\u670d\u52a1\u5668\u7684\u6570\u636e<\/cite><\/blockquote>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
iii. \u5e38\u7528\u8bf7\u6c42\u5934\u7684\u8bf4\u660e<\/p>Accept: \u8868\u793a\u5ba2\u6237\u7aef\u53ef\u4ee5\u63a5\u6536\u7684\u6570\u636e\u7c7b\u578b
Accpet-Languege: \u8868\u793a\u5ba2\u6237\u7aef\u53ef\u4ee5\u63a5\u6536\u7684\u8bed\u8a00\u7c7b\u578b
User-Agent: \u8868\u793a\u5ba2\u6237\u7aef\u6d4f\u89c8\u5668\u7684\u4fe1\u606f
Host\uff1a \u8868\u793a\u8bf7\u6c42\u65f6\u7684\u670d\u52a1\u5668 ip \u548c\u7aef\u53e3\u53f7<\/cite><\/blockquote>\n\n\n\n
iv. \u54ea\u4e9b\u662f GET \u8bf7\u6c42\uff0c\u54ea\u4e9b\u662f POST \u8bf7\u6c42<\/p>GET \u8bf7\u6c42\u6709\u54ea\u4e9b\uff1a
1\u3001form \u6807\u7b7e method=get
2\u3001a \u6807\u7b7e
3\u3001link \u6807\u7b7e\u5f15\u5165 css
4\u3001Script \u6807\u7b7e\u5f15\u5165 js \u6587\u4ef6
5\u3001img \u6807\u7b7e\u5f15\u5165\u56fe\u7247
6\u3001iframe \u5f15\u5165 html \u9875\u9762
7\u3001\u5728\u6d4f\u89c8\u5668\u5730\u5740\u680f\u4e2d\u8f93\u5165\u5730\u5740\u540e\u6572\u56de\u8f66

POST \u8bf7\u6c42\u6709\u54ea\u4e9b\uff1a
8\u3001form \u6807\u7b7e method=post<\/cite><\/blockquote>\n\n\n\n
c)\u54cd\u5e94\u7684 HTTP \u534f\u8bae\u683c\u5f0f\n\n1\u3001\u54cd\u5e94\u884c\n(1) \u54cd\u5e94\u7684\u534f\u8bae\u548c\u7248\u672c\u53f7\n(2) \u54cd\u5e94\u72b6\u6001\u7801\n(3) \u54cd\u5e94\u72b6\u6001\u63cf\u8ff0\u7b26\n\n2\u3001\u54cd\u5e94\u5934\n(1) key : value      \u4e0d\u540c\u7684\u54cd\u5e94\u5934\uff0c\u6709\u5176\u4e0d\u540c\u542b\u4e49\n\n\u7a7a\u884c\n\n3\u3001\u54cd\u5e94\u4f53 ---->>> \u5c31\u662f\u56de\u4f20\u7ed9\u5ba2\u6237\u7aef\u7684\u6570\u636e<\/code><\/pre>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
d)\u5e38\u7528\u7684\u54cd\u5e94\u7801\u8bf4\u660e\n\n200          \u8868\u793a\u8bf7\u6c42\u6210\u529f\n302          \u8868\u793a\u8bf7\u6c42\u91cd\u5b9a\u5411\uff08\u660e\u5929\u8bb2\uff09\n404          \u8868\u793a\u8bf7\u6c42\u670d\u52a1\u5668\u5df2\u7ecf\u6536\u5230\u4e86\uff0c\u4f46\u662f\u4f60\u8981\u7684\u6570\u636e\u4e0d\u5b58\u5728\uff08\u8bf7\u6c42\u5730\u5740\u9519\u8bef\uff09\n500          \u8868\u793a\u670d\u52a1\u5668\u5df2\u7ecf\u6536\u5230\u8bf7\u6c42\uff0c\u4f46\u662f\u670d\u52a1\u5668\u5185\u90e8\u9519\u8bef\uff08\u4ee3\u7801\u9519\u8bef\uff09<\/code><\/pre>\n\n\n\n
e)MIME \u7c7b\u578b\u8bf4\u660e\n\nMIME \u662f HTTP \u534f\u8bae\u4e2d\u6570\u636e\u7c7b\u578b\u3002\nMIME \u7684\u82f1\u6587\u5168\u79f0\u662f\"Multipurpose Internet Mail Extensions\" \u591a\u529f\u80fd Internet \u90ae\u4ef6\u6269\u5145\u670d\u52a1\u3002MIME \u7c7b\u578b\u7684\u683c\u5f0f\u662f\u201c\u5927\u7c7b\u578b\/\u5c0f\u7c7b\u578b\u201d\uff0c\u5e76\u4e0e\u67d0\u4e00\u79cd\u6587\u4ef6\u7684\u6269\u5c55\u540d\u76f8\u5bf9\u5e94\u3002<\/code><\/pre>\n\n\n\n
\u5e38\u89c1\u7684 MIME \u7c7b\u578b\uff1a<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u8c37\u6b4c\u6d4f\u89c8\u5668\u5982\u4f55\u67e5\u770b HTTP \u534f\u8bae\uff1a<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u706b\u72d0\u6d4f\u89c8\u5668\u5982\u4f55\u67e5\u770b HTTP \u534f\u8bae\uff1a<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"
06-Servlet 3.ServletContext \u7c7b 4.HTTP \u534f\u8bae i. GET \u8bf7\u6c42 1\u3001\u8bf7\u6c42\u884c […]<\/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-2153","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\/2153"}],"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=2153"}],"version-history":[{"count":4,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2153\/revisions"}],"predecessor-version":[{"id":2699,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2153\/revisions\/2699"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}