Tomcat错误404：源服务器没有找到目标资源的当前表示形式，或者不愿意透露存在此表示形式

Question

    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/maven-v4_0_0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com.javaee8</groupId>
      <artifactId>hello-javaee8</artifactId>
      <packaging>war</packaging>
      <version>0.0.1-SNAPSHOT</version>
      <name>hello-javaee8 Maven Webapp</name>
      <url>http://maven.apache.org</url>


      <dependencies>
      <dependency>
      <groupId>javax</groupId>
      <artifactId>javaee-api</artifactId>
      <version>8.0</version>
      <scope>provided</scope>
      </dependency>
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>3.8.1</version>
          <scope>test</scope>
        </dependency>

        <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
    </dependency>

      </dependencies>
      <build>
        <finalName>hello-javaee8</finalName>
      </build>
    </project>

web.xml

    <!DOCTYPE web-app PUBLIC
     "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
     "http://java.sun.com/dtd/web-app_2_3.dtd" >

    <web-app>
      <display-name>Archetype Created Web Application</display-name>
    </web-app>

如果我需要添加任何其他文件来找到此解决方案，请告诉我

Answer 1

原因有二。

首先，您不包括JAX-RS实现，只包括JAX-RS API。JAX-RS API只提供一组接口，而由实现来提供这些接口的具体实现。

如果您没有JAX-RS实现，我建议您使用Jersey（参考实现）。将以下内容添加到pom.xml:

<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-servlet-core</artifactId>
    <version>2.29</version>
</dependency>

null

<servlet>
    <servlet-name>Jersey Web Application</filter-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value><!-- FQN of your Application/ResourceConfig class --></param-value>
    </init-param>
</servlet>
<servlet-mapping>
    <servlet-name>Jersey Web Application</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>