Servlet \u7a0b\u5e8f\u548c ServletConfig \u5bf9\u8c61\u90fd\u662f\u7531 Tomcat \u8d1f\u8d23\u521b\u5efa\uff0c\u6211\u4eec\u8d1f\u8d23\u4f7f\u7528\u3002
Servlet \u7a0b\u5e8f\u9ed8\u8ba4\u662f\u7b2c\u4e00\u6b21\u8bbf\u95ee\u7684\u65f6\u5019\u521b\u5efa\uff0cServletConfig \u662f\u6bcf\u4e2a Servlet \u7a0b\u5e8f\u521b\u5efa\u65f6\uff0c\u5c31\u521b\u5efa\u4e00\u4e2a\u5bf9\u5e94\u7684 ServletConfig \u5bf9\u8c61\u3002<\/p>\n\n\n\n
package top.qaqaq.P131;\n\nimport jakarta.servlet.ServletConfig;\nimport jakarta.servlet.ServletException;\nimport jakarta.servlet.http.HttpServlet;\nimport jakarta.servlet.http.HttpServletRequest;\nimport jakarta.servlet.http.HttpServletResponse;\n\nimport java.io.IOException;\n\n\/**\n * @author RichieZhang\n * @create 2022-12-04 \u4e0b\u5348 8:33\n *\/\npublic class HelloServlet5 extends HttpServlet {\n\n @Override\n public void init(ServletConfig config) throws ServletException {\n super.init(config);\n System.out.println(\"\u91cd\u5199\u4e86init\u521d\u59cb\u5316\u65b9\u6cd5\uff0c\u505a\u4e86\u4e00\u4e9b\u5de5\u4f5c\");\n }\n\n \/**\n * doGet() \u5728get\u8bf7\u6c42\u7684\u65f6\u5019\u8c03\u7528\n * @param req\n * @param resp\n * @throws ServletException\n * @throws IOException\n *\/\n @Override\n protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n\/\/ super.doGet(req, resp);\n System.out.println(\"HelloServlet2 \u7684doGet\u65b9\u6cd5\");\n\n \/\/\u4e5f\u53ef\u4ee5\u4f7f\u7528\uff1a\n ServletConfig servletConfig = getServletConfig();\n System.out.println(servletConfig);\n\n \/\/\u83b7\u53d6\u521d\u59cb\u5316\u53c2\u6570 init-param \u4e3a\u81ea\u5df1\u7684\n System.out.println(\"\u521d\u59cb\u5316\u53c2\u6570username\u7684\u503c\u662f\uff1a\" + servletConfig.getInitParameter(\"username\"));\n System.out.println(\"\u521d\u59cb\u5316\u53c2\u6570url\u7684\u503c\u662f\uff1a\" + servletConfig.getInitParameter(\"url\"));\n }\n\n \/**\n * doPost() \u5728post\u8bf7\u6c42\u7684\u65f6\u5019\u8c03\u7528\n * @param req\n * @param resp\n * @throws ServletException\n * @throws IOException\n *\/\n @Override\n protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n\/\/ super.doPost(req, resp);\n System.out.println(\"HelloServlet2 \u7684doPost\u65b9\u6cd5\");\n }\n}\n<\/code><\/pre>\n\n\n\n<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<web-app xmlns=\"http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\"\n xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"\n xsi:schemaLocation=\"http:\/\/xmlns.jcp.org\/xml\/ns\/javaee http:\/\/xmlns.jcp.org\/xml\/ns\/javaee\/web-app_4_0.xsd\"\n version=\"4.0\">\n\n <!-- servlet\u6807\u7b7e\u7ed9Tomcat\u914d\u7f6eServlet\u7a0b\u5e8f -->\n <servlet>\n <!--servlet-name\u6807\u7b7e Servlet\u7a0b\u5e8f\u8d77\u4e00\u4e2a\u522b\u540d\uff08\u4e00\u822c\u662f\u7c7b\u540d\uff09-->\n <servlet-name>HelloServlet<\/servlet-name>\n <!--servlet-class\u662fServlet\u7a0b\u5e8f\u7684\u5168\u7c7b\u540d\uff09-->\n <servlet-class>top.qaqaq.P122.HelloServlet<\/servlet-class>\n <\/servlet>\n\n <!-- servlet-mapping\u6807\u7b7e\u7ed9servlet\u7a0b\u5e8f\u914d\u7f6e\u8bbf\u95ee\u5730\u5740 -->\n <servlet-mapping>\n <!-- servlet-name\u6807\u7b7e\u7684\u4f5c\u7528\u662f\u544a\u8bc9\u670d\u52a1\u5668\uff0c\u6211\u5f53\u524d\u914d\u7f6e\u7684\u5730\u5740\u7ed9\u54ea\u4e2aservlet\u7a0b\u5e8f\u4f7f\u7528 -->\n <servlet-name>HelloServlet<\/servlet-name>\n <!-- url-pattern\u6807\u7b7e\u914d\u7f6e\u8bbf\u95ee\u5730\u5740\n \/ \u659c\u6760\u5728\u670d\u52a1\u5668\u89e3\u6790\u7684\u65f6\u5019\uff0c\u8868\u793a\u5730\u5740\u4e3a\uff1ahttp:\/\/ip:port\/\u5de5\u7a0b\u8def\u5f84\n \/hello \u8868\u793a\u5730\u5740\u4e3a\uff1ahttp:\/\/ip:port\/\u5de5\u7a0b\u8def\u5f84\/hello\n -->\n <url-pattern>\/hello<\/url-pattern>\n <\/servlet-mapping>\n \n <servlet>\n <servlet-name>HelloServlet2<\/servlet-name>\n <servlet-class>top.qaqaq.P127.HelloServlet2<\/servlet-class>\n <\/servlet>\n <servlet-mapping>\n <servlet-name>HelloServlet2<\/servlet-name>\n <url-pattern>\/hello2<\/url-pattern>\n <\/servlet-mapping>\n\n <servlet>\n <servlet-name>HelloServlet3<\/servlet-name>\n <servlet-class>top.qaqaq.P128.HelloServlet3<\/servlet-class>\n <\/servlet>\n <servlet-mapping>\n <servlet-name>HelloServlet3<\/servlet-name>\n <url-pattern>\/hello3<\/url-pattern>\n <\/servlet-mapping>\n\n <servlet>\n <servlet-name>HelloServlet4<\/servlet-name>\n <servlet-class>top.qaqaq.P130.HelloServlet4<\/servlet-class>\n <!-- init-param\u662f\u521d\u59cb\u5316\u53c2\u6570 -->\n <init-param>\n <!-- \u662f\u53c2\u6570\u540d -->\n <param-name>username<\/param-name>\n <!-- \u662f\u53c2\u6570\u503c -->\n <param-value>root<\/param-value>\n <\/init-param>\n <!-- init-param\u662f\u521d\u59cb\u5316\u53c2\u6570 -->\n <init-param>\n <!-- \u662f\u53c2\u6570\u540d -->\n <param-name>url<\/param-name>\n <!-- \u662f\u53c2\u6570\u503c -->\n <param-value>jdbc:mysql:\/\/localhost:3306\/test<\/param-value>\n <\/init-param>\n <\/servlet>\n <servlet-mapping>\n <servlet-name>HelloServlet4<\/servlet-name>\n <url-pattern>\/hello4<\/url-pattern>\n <\/servlet-mapping>\n\n <servlet>\n <servlet-name>HelloServlet5<\/servlet-name>\n <servlet-class>top.qaqaq.P131.HelloServlet5<\/servlet-class>\n <!-- init-param\u662f\u521d\u59cb\u5316\u53c2\u6570 -->\n <init-param>\n <!-- \u662f\u53c2\u6570\u540d -->\n <param-name>username<\/param-name>\n <!-- \u662f\u53c2\u6570\u503c -->\n <param-value>root2<\/param-value>\n <\/init-param>\n <!-- init-param\u662f\u521d\u59cb\u5316\u53c2\u6570 -->\n <init-param>\n <!-- \u662f\u53c2\u6570\u540d -->\n <param-name>url<\/param-name>\n <!-- \u662f\u53c2\u6570\u503c -->\n <param-value>jdbc:mysql:\/\/localhost:3306\/test2<\/param-value>\n <\/init-param>\n <\/servlet>\n <servlet-mapping>\n <servlet-name>HelloServlet5<\/servlet-name>\n <url-pattern>\/hello5<\/url-pattern>\n <\/servlet-mapping>\n<\/web-app><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"Servlet \u7a0b\u5e8f\u548c ServletConfig \u5bf9\u8c61\u90fd\u662f\u7531 Tomcat \u8d1f\u8d23\u521b\u5efa\uff0c\u6211\u4eec\u8d1f\u8d23\u4f7f\u7528\u3002Serv […]<\/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-2142","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\/2142"}],"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=2142"}],"version-history":[{"count":2,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2142\/revisions"}],"predecessor-version":[{"id":2144,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2142\/revisions\/2144"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2142"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}