在 Tomcat 9 中运行 JAVA 13 JAX-RS 项目的问题

Question

我正在做这个简单的项目，但遇到了这个问题：

HTTP Status 404 – Not Found
Type Status Report

Message /RestTestThree/myService/Calculator/

Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.

Apache Tomcat/9.0.30

我使用此设置：JDK 13、Eclipse 2019-12、Tomcat 9。

我尝试了不同的 URL，希望这个是正确的：

http://localhost:8080/RestTestThree/myService/Calculator/

我尝试了模型 3 和模型 4。尝试了不同的依赖项和版本。

当尝试运行这个项目时，有时 Tomcat 甚至无法启动，出现错误

Server Tomcat v9.0 Server at localhost 启动失败。

我的文件如下。

pom.xml

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.RestTestThree</groupId>
<artifactId>RestTestThree</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.0</version>
            <configuration>
                <release>13</release>
            </configuration>
        </plugin>
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <version>3.2.3</version>
            <configuration>
                <warSourceDirectory>WebContent</warSourceDirectory>
            </configuration>
        </plugin>
    </plugins>
</build>

<dependencies>

    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-bundle</artifactId>
        <version>1.17</version>
    </dependency>

    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-server</artifactId>
        <version>1.17</version>
    </dependency>

    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-core</artifactId>
        <version>1.17</version>
    </dependency>

    <dependency>
        <groupId>com.sun.xml.bind</groupId>
        <artifactId>jaxb-impl</artifactId>
        <version>2.1.2</version>
    </dependency>

    <dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>2.3.1</version>
    </dependency>

</dependencies>

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"
id="WebApp_ID" version="3.0">
<display-name>RestTestThree</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>
    <servlet-name>Jersey Web Application</servlet-name>
    <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>com.sun.jersey.config.property.packages</param-name>
        <param-value>com.Calculator</param-value>  <!--comma separated packages -->
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>Simple REST Service</servlet-name>
    <url-pattern>/myService/*</url-pattern>
</servlet-mapping>

Calculator.java

package com;
import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;

@Path("/Calculator")
public class Calculator
{
    @GET
    @Path("/")
    @Produces(MediaType.TEXT_PLAIN)
    public String hello()
    {
        return "Working...";
    }

    @GET
    @Path("/Add")
    @Produces(MediaType.TEXT_PLAIN)
    public String add()
    {
        return "<div>Sum = 10</div>";
    }
}

Answer 1

我遇到了同样的问题。将 java 13 降级到 11 后一切正常。需要将项目转换为 11 个。