{"id":2668,"date":"2020-12-11T14:49:49","date_gmt":"2020-12-11T06:49:49","guid":{"rendered":"http:\/\/127.0.0.2\/?p=2668"},"modified":"2021-01-01T14:37:10","modified_gmt":"2021-01-01T06:37:10","slug":"202java%e6%a1%86%e6%9e%b6%e6%95%99%e7%a8%8b%e4%b9%8bspringmvc%e5%b8%b8%e8%a7%81%e6%b3%a8%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.9713job.com\/?p=2668","title":{"rendered":"202java\u6846\u67b6\u6559\u7a0b\u4e4bspringMVC\u5e38\u89c1\u6ce8\u89e3"},"content":{"rendered":"

202java\u6846\u67b6\u6559\u7a0b\u4e4bspringMVC\u5e38\u89c1\u6ce8\u89e3<\/h3>\n

1.@RequestMapping\u7684\u4f4d\u7f6e<\/strong><\/p>\n

@RequestMapping(“\/uri”)<\/p>\n

@Controller\r\n@RequestMapping(\"\/hello\")\r\npublic class HelloWorld {\r\n    @RequestMapping(\"\/world\")\r\n    public String helloworld(){\r\n        System.out.println(\"hello world\");\r\n        return \"helloworld\";\r\n    }\r\n}<\/pre>\n
2.@RequestMapping\u7684\u8bf7\u6c42\u65b9\u5f0f<\/strong><\/p>\n
POST\u5f62\u5f0f\uff1a@RequestMapping(value = “\/world”,method = RequestMethod.POST)<\/p>\n
GET\u5f62\u5f0f\uff1a@RequestMapping(value = “\/world”,method = RequestMethod.GET)<\/p>\n
\u5982\u679c\u4e0d\u6307\u5b9amethod\uff0c\u90a3\u4e48\u53ef\u4ee5\u63a5\u53d7\u4efb\u4f55\u7c7b\u578b\u7684\u8bf7\u6c42\u3002
\n\u5982\u679c\u8bf7\u6c42\u65b9\u5f0f\u4e0d\u5bf9\uff0c\u5219\u62a5405\u9519\u8bef
\n<\/p>\n
3.\u5904\u7406\u8bf7\u6c42\u53c2\u6570<\/strong><\/p>\n
A.\u81ea\u52a8\u53c2\u6570\u5339\u914d\uff1a\u8868\u5355\u4e2d\u63a7\u4ef6\u7684name\u7684\u503c\u548ccontroller\u5c42\u65b9\u6cd5\u7684\u53c2\u6570\u540d\u4e00\u81f4\uff0c\u5219\u5339\u914d<\/span><\/p>\n
\u8868\u5355\u7684controller\u548cform<\/p>\n
@Controller\r\n@RequestMapping(\"\/hello\")\r\npublic class HelloWorld {\r\n    @RequestMapping(value = \"\/loginform\")\r\n    public String loginform(){\r\n        return \"login\";\r\n    }\r\n}<\/pre>\n
<form action=\"\" method=\"post\">\r\n    <label for=\"username\">\r\n        username : <input type=\"text\" id=\"username\" name=\"username\"><br>\r\n    <\/label>\r\n    <label for=\"password\">\r\n        password : <input type=\"password\" name=\"password\" id=\"password\">\r\n    <\/label>\r\n    <button>\u767b\u5f55<\/button>\r\n<\/form><\/pre>\n
\u63d0\u4ea4\u7684\u8868\u5355controller<\/p>\n
@Controller\r\n@RequestMapping(\"\/hello\")\r\npublic class HelloWorld {\r\n    @RequestMapping(value = \"\/world\",method = RequestMethod.GET)\r\n    public String helloworld(){\r\n        System.out.println(\"hello world\");\r\n        return \"helloworld\";\r\n    }\r\n    @RequestMapping(value = \"\/loginform\")\r\n    public String loginform(){\r\n        return \"login\";\r\n    }\r\n    @RequestMapping(value = \"\/login\",method = RequestMethod.POST)\r\n    public String login(String username,String password){\r\n        System.out.println(\"\u6267\u884c\u767b\u5f55\");\r\n        System.out.println(\"username:\"+username+\"\\n\"+\"password:\"+password);\r\n        return \"redirect:world\";\r\n    }\r\n}<\/pre>\n

\nB.\u5982\u679c\u4e0d\u4e00\u81f4\uff0c\u4f7f\u7528@RequestParam() \u6ce8\u89e3<\/span><\/p>\n
\u8868\u5355\uff1a<label>username : <input type=”text” id=”username” name=”username2″><\/label><\/p>\n
controller\uff1a<\/p>\n
public String login(@RequestParam(value = “username2”) String username, String password){<\/p>\n
C.url\u5730\u5740\u4e2dget\u5f62\u5f0f\u7684\u53c2\u6570\u5339\u914d\uff1a<\/span><\/p>\n
url:..\/user\/userinfo?username=admin&password=admin<\/p>\n
controller:<\/p>\n
@RequestMapping(\"\/user\")\r\npublic class HelloWorld {<\/pre>\n
@RequestMapping(value = \"\/userinfo\",method = RequestMethod.GET)\r\npublic String login(String username, String password){\r\nSystem.out.println(\"\u6267\u884c\u767b\u5f55\");\r\nSystem.out.println(\"username:\"+username+\"\\n\"+\"password:\"+password);\r\nreturn \"redirect:world\";\r\n}<\/pre>\n
\u521b\u5efajsp\u6587\u4ef6<\/p>\n
D.\u53ef\u4ee5\u7528@RequestParam\u7684defaultValue\u8bbe\u7f6e\u53c2\u6570\u7684\u9ed8\u8ba4\u503c<\/span><\/p>\n
public String login(\r\n        @RequestParam(value = \"username\",defaultValue = \"admin\")<\/span> String username,\r\n        @RequestParam(value = \"password\",defaultValue = \"admin\")<\/span> String password){\r\n    System.out.println(\"\u6267\u884c\u767b\u5f55\");\r\n    System.out.println(\"username:\"+username+\"\\n\"+\"password:\"+password);\r\n    return \"redirect:world\";\r\n}<\/pre>\n
E.\u5982\u679c\u662f\u6574\u6570\u7c7b\u578b\uff0c\u5fc5\u987b\u4f7f\u7528\u5305\u88c5\u7c7b\u578b\uff0c\u5982Integer<\/span><\/p>\n
\u56e0\u4e3a\u5f53\u53c2\u6570\u4e0d\u5b58\u5728\u65f6\uff0cSpringMVC\u4f1a\u5c06\u53c2\u6570\u7684\u503c\u8f6c\u6362\u4e3anull\u3002
\n\u800c\u4f7f\u7528\u57fa\u672c\u7c7b\u578b\u4f1a\u51fa\u73b0\u8f6c\u6362\u5f02\u5e38\u3002<\/p>\n
F.\u8bbe\u7f6e\u53c2\u6570\u662f\u5426\u53ef\u9009\uff1a<\/span><\/p>\n
\u53ef\u4ee5\u4f7f\u7528 required \u5c5e\u6027\u8bbe\u7f6e\u53c2\u6570\u662f\u5426\u53ef\u9009\u53c2\u6570<\/p>\n
public String login(\r\n        @RequestParam(value = \"username\",required = false<\/span>) String username, String password){<\/pre>\n
4.\u8def\u5f84\u53c2\u6570<\/strong><\/p>\n
@RequestMapping(\"\/get\/{id}<\/span>\")\r\npublic String get(@PathVariable(value = \"id\")<\/span> Integer id){\r\n    System.out.println(\"id:\"+id);\r\n    return \"hello\/edit\";\/\/\u521b\u5efa edit \u7684jsp\u9875\u9762\r\n}<\/pre>\n
5.\u8bf7\u6c42\u8f6c\u53d1\u548c\u8df3\u8f6c<\/strong><\/p>\n
\u8bf7\u6c42\u8f6c\u53d1\uff1areturn “\u89c6\u56fe\u540d\u79f0”<\/p>\n
\u8bf7\u6c42\u8df3\u8f6c\uff1areturn “redirect:controller\u7684mapping\u5730\u5740”<\/p>\n
6.\u89e3\u51b3post\u4e71\u7801\u95ee\u9898<\/strong><\/p>\n
<!-- \u89e3\u51b3 SpringMVC\u7684 post \u4e71\u7801 -->\r\n<filter>\r\n  <filter-name>requestContextFilter<\/filter-name>\r\n  <filter-class>org.springframework.web.filter.RequestContextFilter<\/filter-class>\r\n  <init-param>\r\n    <param-name>encoding<\/param-name>\r\n    <param-value>UTF-8<\/param-value>\r\n  <\/init-param>\r\n  <init-param>\r\n    <param-name>forceEncoding<\/param-name>\r\n    <param-value>true<\/param-value>\r\n  <\/init-param>\r\n<\/filter>\r\n<filter-mapping>\r\n  <filter-name>requestContextFilter<\/filter-name>\r\n  <url-pattern>\/*<\/url-pattern>\r\n<\/filter-mapping><\/pre>\n
7.CookieValue<\/strong><\/p>\n
@RequestMapping(\"\/cookie\")\r\npublic String getCookie(@CookieValue(\"JSESSIONID\") String cookies){\r\n    System.out.println(cookies);\r\n    return \"cookie\";\r\n}<\/pre>\n
8.@RequestHeader<\/strong><\/p>\n
\u83b7\u53d6\u8bf7\u6c42\u5934\u67d0\u4e00\u90e8\u5206\u7684\u503c<\/p>\n
@RequestMapping(\"\/header\")\r\npublic String getHeader(@RequestHeader(value = \"Accept-Language\") String header){\r\n    System.out.println(header);\r\n    return \"header\";\r\n}<\/pre>\n
9.\u8bf7\u6c42\u53c2\u6570\u548c\u8bf7\u6c42\u5934\u8868\u8fbe\u5f0f<\/strong><\/p>\n
@RequestMapping(value = \"\/testparam\",params = {\"username\",\"age!=10\"})\r\npublic String testParam(String username,Integer age){\r\n    System.out.println(username+\" \"+age);\r\n    return \"cookie\";\r\n}\r\n\u4f20\u53c2\uff1ahttp:\/\/localhost:8080\/testhome\/testparam?username=admin&age=11<\/pre>\n","protected":false},"excerpt":{"rendered":"
202java\u6846\u67b6\u6559\u7a0b\u4e4bspringMVC\u5e38\u89c1\u6ce8\u89e3 1.@RequestMapping\u7684\u4f4d\u7f6e @Request […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-2668","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2668","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2668"}],"version-history":[{"count":6,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2668\/revisions"}],"predecessor-version":[{"id":2696,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2668\/revisions\/2696"}],"wp:attachment":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}