java - HTTP 状态 404 -> 请求的资源不可用

Question

所以，我正在为我的网站编写一个登录页面，并添加了一些新的接口和 servlet，当我去测试我的 .jsp 文件都没有工作时，我收到了 404 错误。

最终我尝试将它们重命名为 .html 以查看是否有任何作用，它没有，我还尝试删除一些代码以查看它是否是不正确的代码，最终我意识到它可能是我的 web.xml，我与 xml 相关的任何事情都不是最棒的，我有点讨厌它，无论如何，我已经被困在这里 6 个小时了。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>PowerBoot</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <description></description>
    <display-name>Servlet</display-name>
    <servlet-name>Servlet</servlet-name>
    <servlet-class>club.powerboot.website.Servlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>Servlet</servlet-name>
    <url-pattern>/Servlet</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>Login</display-name>
    <servlet-name>Login</servlet-name>
    <servlet-class>club.powerboot.website.login.Login</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>Login</servlet-name>
    <url-pattern>/Login</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>CheckCredits</display-name>
    <servlet-name>CheckCredits</servlet-name>
    <servlet-class>club.powerboot.website.login.CheckCredits</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>CheckCredits</servlet-name>
    <url-pattern>/CheckCredits</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>ConnectDatabase</display-name>
    <servlet-name>ConnectDatabase</servlet-name>
    <servlet-class>club.powerboot.website.sql.ConnectDatabase</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>ConnectDatabase</servlet-name>
    <url-pattern>/ConnectDatabase</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>SQLConnection</display-name>
    <servlet-name>SQLConnection</servlet-name>
    <servlet-class>club.powerboot.website.sql.SQLConnection</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>SQLConnection</servlet-name>
    <url-pattern>/SQLConnection</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>Provider</display-name>
    <servlet-name>Provider</servlet-name>
    <servlet-class>club.powerboot.website.sql.Provider</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>Provider</servlet-name>
    <url-pattern>/Provider</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>LoginRegister</display-name>
    <servlet-name>LoginRegister</servlet-name>
    <servlet-class>club.powerboot.website.login.LoginRegister</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>LoginRegister</servlet-name>
    <url-pattern>/LoginRegister</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>Register</display-name>
    <servlet-name>Register</servlet-name>
    <servlet-class>club.powerboot.website.login.Register</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>Register</servlet-name>
    <url-pattern>/Register</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>LoginHandler</display-name>
    <servlet-name>LoginHandler</servlet-name>
    <servlet-class>club.powerboot.website.login.LoginHandler</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>LoginHandler</servlet-name>
    <url-pattern>/Login</url-pattern>
  </servlet-mapping>
  <servlet>
    <description></description>
    <display-name>RegisterLogin</display-name>
    <servlet-name>RegisterLogin</servlet-name>
    <servlet-class>club.powerboot.website.login.RegisterLogin</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>RegisterLogin</servlet-name>
    <url-pattern>/registerLogin</url-pattern>
  </servlet-mapping>
</web-app>```

I just want to know why this issue is occurring so i can try to avoid it in the future.

标签： javajakarta-eetomcat9