Question

我正在尝试创建一个简单的servlet应用程序，但是当我将它部署到我的Tomcat服务器（8.5）时，localhost：8080为我提供了 405方法不允许错误。我不知道处理这个错误

我的pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.devcolibri</groupId>
    <artifactId>com.devcolibri.servlet</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
    </dependencies>

</project>

我的MainServlet.java

    package com.devcolibri.servlet;

    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import java.io.IOException;

    public class MainServlet extends HttpServlet {


    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {

        PrintWriter out = resp.getWriter();
        out.print("<h1>Hello Servlet</h1>");

    }
}

我的web.xml

<?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_3_0.xsd"
         version="3.0">

    <servlet>
        <servlet-name>mainServlet</servlet-name>
        <servlet-class>com.devcolibri.servlet.MainServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>mainServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

Answer 1

我想我一直错过了显而易见的事情：我怀疑你的war文件没有部署在斜线上。它可以部署在您的工件ID下。要将其部署在主机的根目录上，需要进行更多配置。试试http://localhost:8080/com.devcolibri.servlet/

编辑：

或http://localhost:8080/com.devcolibri.servlet-1.0-SNAPSHOT/它应该是您的战争档案名称。

Answer 2

看起来访问servlet的方式不适用于受保护类型的doGet方法。请尝试doGet公开。

public void doGet(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {

    PrintWriter out = resp.getWriter();
    out.print("<h1>Hello Servlet</h1>");

}

您可以在此处参阅有关受保护和公开的更多信息：what is the difference between public service() method and protected service() method of httpservlet

如何处理servlet？

2 个答案: