java - 为什么不支持 SpringMVC 请求方法 'GET'？

Question

我尝试 @RequestMapping(value = "/test", method = RequestMethod.POST) 但出错了

代码是

 @Controller
 public class HelloWordController {
 private Logger logger = LoggerFactory.getLogger(HelloWordController.class);

 @RequestMapping(value = "/test", method = RequestMethod.POST)
 public String welcome() {
  logger.info("Spring params is welcome");
  return "/WEB-INF/jsp/welcome";
 }

}

web.xml 是

<servlet>
<description>This is Spring MVC DispatcherServlet</description>
<servlet-name>SpringMVC DispatchServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
  <description>SpringContext</description>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath*:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>

  <servlet-mapping>
<servlet-name>SpringMVC DispatchServlet</servlet-name>
<url-pattern>/</url-pattern>

而springmvc.xml是

index.jsp 是

<form action="<%=request.getContextPath() %>/test" method="post">
<input type="submit" value="submit"> 
</form>

我输入提交按钮浏览器出错

HTTP Status 405 - Request method 'GET' not supported type Status report

message Request method 'GET' not supported

description The specified HTTP method is not allowed for the requested resource (Request method 'GET' not supported).

Answer 1

method = POST 如果您将表单“发布”到 url/test 将起作用。

如果你在浏览器的地址栏中输入一个url然后回车，它总是一个GET请求，所以你必须指定POST请求。

Google for HTTP GET 和 HTTP POST(还有其他几个，例如 PUT DELETE)。它们都有各自的含义。