Java Jersey:HTTP状态500。服务器遇到一个内部错误，使其无法执行此请求错误_Java_Rest_Jersey

Java Jersey:HTTP状态500。服务器遇到一个内部错误，使其无法执行此请求错误

java rest jersey

Java Jersey:HTTP状态500。服务器遇到一个内部错误，使其无法执行此请求错误,java,rest,jersey,Java,Rest,Jersey,我有一个UserResource（root）类，如下所示： @Path("users") @Produces(MediaType.APPLICATION_JSON) @Consumes(MediaType.APPLICATION_JSON) public class UserResource { //.... // Subresource @Path("/{userId}/adverts") public AdvertResource getAdvertRes

我有一个UserResource（root）类，如下所示：

@Path("users")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class UserResource {

    //....

    // Subresource
    @Path("/{userId}/adverts")
    public AdvertResource getAdvertResource() {
       return new AdvertResource();
    }
}

AdverResource类是一个子资源，处理来自以下位置的请求：

http://localhost:8080/appName/api/users/1/adverts

，看起来像这样：

@Path("/")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class AdvertResource {

    //...

    @GET
    public List<Advert> getAll(@PathParam("userId") int userId) {
        return this.advertFacade.findAllByUserId(userId);
    }
}

@GET
public String getAll(@PathParam("userId") int userId) {
    return "User ID is: " + userId;
}

<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.example</groupId>
    <artifactId>appName</artifactId>
    <packaging>war</packaging>
    <version>1.0</version>
    <name>appName</name>

    <build>
        <finalName>appName</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.5.1</version>
                <inherited>true</inherited>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.glassfish.jersey</groupId>
                <artifactId>jersey-bom</artifactId>
                <version>${jersey.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet-core</artifactId>
            <!-- use the following artifactId if you don't need servlet 2.x compatibility -->
            <!-- artifactId>jersey-container-servlet</artifactId -->
        </dependency>
        <!-- uncomment this to get JSON support
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-moxy</artifactId>
        </dependency>   -->

        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>eclipselink</artifactId>
            <version>2.5.2</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
            <version>2.5.2</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <type>jar</type>
        </dependency>

        <dependency>
            <groupId>com.owlike</groupId>
            <artifactId>genson</artifactId>
            <version>1.3</version>
        </dependency>

    </dependencies>
    <properties>
        <jersey.version>2.22.1</jersey.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
</project>

它工作正常，我得到的输出

用户ID为：99
我从原型创建了项目：jersey快速启动ejb
org.glassfish.jersey.archetypes
，我使用glassfish 4.1。我的pom.xml如下所示：
@Path("/")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
public class AdvertResource {

    //...

    @GET
    public List<Advert> getAll(@PathParam("userId") int userId) {
        return this.advertFacade.findAllByUserId(userId);
    }
}

@GET
public String getAll(@PathParam("userId") int userId) {
    return "User ID is: " + userId;
}

<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.example</groupId>
    <artifactId>appName</artifactId>
    <packaging>war</packaging>
    <version>1.0</version>
    <name>appName</name>

    <build>
        <finalName>appName</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.5.1</version>
                <inherited>true</inherited>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.glassfish.jersey</groupId>
                <artifactId>jersey-bom</artifactId>
                <version>${jersey.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet-core</artifactId>
            <!-- use the following artifactId if you don't need servlet 2.x compatibility -->
            <!-- artifactId>jersey-container-servlet</artifactId -->
        </dependency>
        <!-- uncomment this to get JSON support
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-moxy</artifactId>
        </dependency>   -->

        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>eclipselink</artifactId>
            <version>2.5.2</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.eclipse.persistence</groupId>
            <artifactId>org.eclipse.persistence.jpa.modelgen.processor</artifactId>
            <version>2.5.2</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <type>jar</type>
        </dependency>

        <dependency>
            <groupId>com.owlike</groupId>
            <artifactId>genson</artifactId>
            <version>1.3</version>
        </dependency>

    </dependencies>
    <properties>
        <jersey.version>2.22.1</jersey.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
</project>


4.0.0
com.example
appName
战争
1
appName
appName
org.apache.maven.plugins
maven编译器插件
2.5.1
真的
1.8
1.8
org.glassfish.jersey
针织面料
${jersey.version}
聚甲醛
进口
org.glassfish.jersey.containers
jersey容器servlet核心
org.eclipse.persistence
日食
2.5.2
假如
org.eclipse.persistence
org.eclipse.persistence.jpa.modelgen.processor
2.5.2
假如
爪哇
javaeewebapi
7
罐子
com.owlike
根森
1.3
2.22.1
UTF-8
Debug。我相信你会得到一个stacktrace告诉你出了什么问题。我猜你在abstractFacade
上得到了一个NPE，因为你说没有它就可以了。@peeskillet谢谢你的评论，但是abstractFacade
工作得很好。我从数据库中获取广告列表。不管怎样，我将按照你的建议尝试调试。调试。我相信你会得到一个stacktrace告诉你出了什么问题。我猜你在abstractFacade
上得到了一个NPE，因为你说没有它就可以了。@peeskillet谢谢你的评论，但是abstractFacade
工作得很好。我从数据库中获取广告列表。无论如何，我都会按照你的建议尝试调试。