RESTEasy 应用程序适用于 tomcat 8.5，但不适用于 tomcat 10.1

Question

我遵循来自 youtube 的 RESTEasy 教程。我做的一切都一样。该示例项目适用于 Tomcat v8.5，但不适用于 Eclipse IDE 中的 Tomcat v10.1。没有具体的错误，所以我不明白为什么会这样？当我向 api 发出请求时，我收到 404 错误，并带有以下描述：

The requested resource [/resteasy-helloworld-example/restapi/hello] is not available

。

源代码：

HelloWorld.java

package org.utarid.resteasytutorial.model;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class HelloWorld {
    private String message;

    public HelloWorld(String message) {
        super();
        this.message = message;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

HelloWorldResource.java

package org.test.resteasytutorial.resource;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import org.test.resteasytutorial.model.HelloWorld;

@Path("hello")
public class HelloWorldResource {

    @GET
    @Produces(MediaType.APPLICATION_JSON)
    public Response helloWorld()
    {
        HelloWorld helloWorld = new HelloWorld("hello world");
        return Response.ok(helloWorld).build();
    }
}

RestEasyServices.java

package org.test.resteasytutorial.resource;

import java.util.HashSet;
import java.util.Set;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;

@ApplicationPath("/restapi")
public class RestEasyServices extends Application {
    private Set<Object> singletons = new HashSet<Object>();

    public RestEasyServices() {
        this.singletons.add(new HelloWorldResource());
    }

    @Override
    public Set<Object> getSingletons() {
        return singletons;
    }
}

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>

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>org.test</groupId>
    <artifactId>resteasy-helloworld-example</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>resteasy-helloworld-example Maven Webapp</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <resteasy.version>3.15.6.Final</resteasy.version>
    </properties>

    <dependencies>
        <!-- Set up RESTEasy -->
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jaxrs</artifactId>
            <version>${resteasy.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-servlet-initializer</artifactId>
            <version>${resteasy.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jackson-provider</artifactId>
            <version>${resteasy.version}</version>
        </dependency>
        <!--  RESTEasy Client Dependency -->
        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-client</artifactId>
            <version>${resteasy.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <finalName>resteasy-helloworld-example</finalName>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven
            defaults (may be moved to parent pom) -->
            <plugins>
                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>3.1.0</version>
                </plugin>
                <!-- see
                http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.0</version>
                </plugin>
                <plugin>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.22.1</version>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.2.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-install-plugin</artifactId>
                    <version>2.5.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-deploy-plugin</artifactId>
                    <version>2.8.2</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

我在 Tomcat 10.1 上尝试了相同的代码，没有进行任何更改。但它不起作用并且没有错误。它说 。

The requested resource [/resteasy-helloworld-example/restapi/hello] is not available

。但我可以使用 Tomcat 8.5 达到相同的 api。

Answer 1

我已经找到解决办法了。首先，我将 JakartaEE 依赖项添加到 pom.xml

<dependency>
    <groupId>jakarta.platform</groupId>
    <artifactId>jakarta.jakartaee-api</artifactId>
    <version>10.0.0</version>
    <scope>provided</scope>
</dependency>

然后我将所有 javax.* 导入更改为 jakarta.*。我从 HelloWorld.java 中删除了

@XmlRootElement

并添加了 json 的

jackson

依赖项。

<dependency>
    <groupId>org.jboss.resteasy</groupId>
    <artifactId>resteasy-jackson2-provider</artifactId>
    <version>6.2.5.Final</version>
</dependency>

我还更新了所有依赖项。现在 pom.xml 的更新版本

<dependencies>
    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>resteasy-servlet-initializer</artifactId>
        <version>6.2.5.Final</version>
    </dependency>
    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>resteasy-jackson2-provider</artifactId>
        <version>6.2.5.Final</version>
    </dependency>
    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>resteasy-client</artifactId>
        <version>6.2.5.Final</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.11</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>jakarta.platform</groupId>
        <artifactId>jakarta.jakartaee-api</artifactId>
        <version>10.0.0</version>
        <scope>provided</scope>
    </dependency>
</dependencies>