如何同时支持 index.html 和“/”Servlet 映射

Question

我的 Java 网络应用程序的根目录中有以下两个 servlet 和一个 index.html 页面。 index.html 页面收集一些数据，使用 Insert servlet 将其插入，然后为用户提供 URL 以检索数据（即浏览器中的 http://localhost:8080/12345). I would like the user to be able to put http://localhost:8080/12345 并调用 Retrieve servlet。

现在发生的事情是当我输入 http://localhost:8080 or http://localhost:8080/ the Retrieve servlet gets called (it's mapped to "/" in the web.xml). I would only like to call the Retrieve servlet when http://localhost:8080/some_data_here 被请求时。对如何修改 servlet 映射以支持这些要求有什么想法吗？

index.html

<html>
   <body>
      <form action = "insert" method = "POST">
         Enter Data: <input type = "text" name = "data">
         <br />
         <input type = "submit" value = "Submit" />
      </form>
   </body>
</html>

WEB.XML

<?xml version="1.0" encoding="ISO-8859-1" ?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">
    <servlet>
        <servlet-name>Insert</servlet-name>
        <servlet-class>com.servlets.Insert</servlet-class>
        <load-on-startup>-1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Insert</servlet-name>
        <url-pattern>/insert</url-pattern>
    </servlet-mapping>
     <servlet>
        <servlet-name>Retrieve</servlet-name>
        <servlet-class>com.servlets.Retrieve</servlet-class>
        <load-on-startup>-1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Retrieve</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
         <welcome-file>index.html</welcome-file>
    </welcome-file-list>
</web-app>

Answer 1

如你所说，不将 Retrieve servlet 映射到 /，而是映射到 /12345，然后将 Insert servlet 之后的请求重定向到 /12345.

如何同时支持 index.html 和“/”Servlet 映射

How to Support both index.html and "/" Servlet Mapping

java

web.xml

servlets