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配置 Servlet 初始化参数 - JavaWeb

web.xml 配置

使用一个或多个 元素为 Servlet 配置初始化参数

示例：

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<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
    id="WebApp_ID" metadata-complete="false" version="4.0">
    <servlet>
        <servlet-name>MyServlet</servlet-name>
        <servlet-class>net.biancheng.www.MyServlet</servlet-class>
        <!-- Servlet 初始化参数 -->
        <init-param>
            <param-name>name</param-name>
            <param-value>编程帮</param-value>
        </init-param>
        <!-- Servlet 初始化参数 -->
        <init-param>
            <param-name>URL</param-name>
            <param-value>www.biancheng.net</param-value>
        </init-param>
    </servlet>
</web-app>

@WebServlet 配置

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@WebServlet(urlPatterns = {"/MyServlet"}, 
            initParams = {
                @WebInitParam(name = "name", value = "编程帮"),
                @WebInitParam(name = "URL", value = "www.biancheng.net")
            }
        )
public class MyServlet extends HttpServlet {
    // ...
}