Question

我试图在我的Jersey 2 webapp启动时初始化StanfordCoreNLP。我发现，ServletContextListener是这样做的，但我没有在jersey 2中使用ServletContextListener吗？

那么如何在我的jersey 2 webapp启动时加载此代码：

interface MergeObserver<T> {

            /**
             * Triggered when the merge algorithm decides to merge only the left entry.
             * This case correspond to the case when there is no equivalent entry on the right collection.
             */
            public void mergeLeft(T entry);

            /**
             * Triggered when the merge algorithm decides to merge both entries.
             * This case correspond to the case when there exists the same entry on both collections.
             */
            public void mergeBoth(T left, T right);

            /**
             * Triggered when the merge algorithm decides to merge only the right entry.
             * This case correspond to the case when there is no equivalent entry on the left collection.
             */
            public void mergeRight(T entry);
        }

修改

的web.xml

Properties props = new Properties();
    props.setProperty("annotators", "tokenize, ssplit, pos, lemma, ner, parse, dcoref");
    StanfordCoreNLP pipeline = new StanfordCoreNLP(props);

的pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- This web.xml file is not required when using Servlet 3.0 container,
see implementation details http://jersey.java.net/nonav/documentation/latest/jax-rs.html -->
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <servlet>
        <servlet-name>com.crawler.c_api.rest.ApplicationResource</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>jersey.config.server.provider.packages</param-name>
            <param-value>com.crawler.c_api</param-value>
        </init-param>        
        <init-param>
            <param-name>jersey.config.server.provider.classnames</param-name>
            <param-value>com.crawler.c_api.provider.ResponseCorsFilter;org.glassfish.jersey.filter.LoggingFilter</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>com.crawler.c_api.rest.ApplicationResource</servlet-name>
        <url-pattern>/api/*</url-pattern>
    </servlet-mapping>
</web-app>

ApplicationResource

<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.crawler</groupId>
    <artifactId>C_API</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>C_API</name>

    <build>
        <finalName>C_API</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>

        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-moxy</artifactId>
        </dependency>


        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP-java6</artifactId>
            <version>2.2.5</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.36</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.9</version>
        </dependency>
        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.13</version>
        </dependency>
        <dependency>
            <groupId>org.mindrot</groupId>
            <artifactId>jbcrypt</artifactId>
            <version>0.3m</version>
        </dependency>
        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>
        <dependency>
            <groupId>com.syncthemall</groupId>
            <artifactId>boilerpipe</artifactId>
            <version>1.2.1</version>
        </dependency>

        <dependency>
            <groupId>xerces</groupId>
            <artifactId>xercesImpl</artifactId>
            <version>2.9.1</version>
        </dependency> 
        <dependency>
            <groupId>net.sourceforge.nekohtml</groupId>
            <artifactId>nekohtml</artifactId>
            <version>1.9.13</version>
        </dependency>



        <dependency>
            <groupId>edu.stanford.nlp</groupId>
            <artifactId>stanford-corenlp</artifactId>
            <version>3.5.2</version>
        </dependency>

        <dependency>
            <groupId>edu.stanford.nlp</groupId>
            <artifactId>stanford-corenlp</artifactId>
            <version>3.5.2</version>
            <classifier>models</classifier>
        </dependency>
    </dependencies>
    <properties>
        <jersey.version>2.19</jersey.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
</project>

Answer 1

ServletContextListener如果是Servlet API的一部分。所以你可以添加

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

但可能没有必要。除了web.xml之外，还有更多方法可以部署Jersey应用程序。您可以延长ResourceConfig。即使您愿意，这也可以让您完全无xml。您在web.xml中配置的所有内容，大部分都可以在ResourceConfig中进行配置。

您甚至可以同时使用web.xml 和 ResourceConfig。例如

public class MyApplication extends ResourceConfig {
    public MyApplication() {
        packages("org.foo.rest;org.bar.rest");
        // do any other initialization here
    }
}

<web-app>
    <servlet>
        <servlet-name>org.foo.rest.MyApplication</servlet-name>
    </servlet>
    ...
    <servlet-mapping>
        <servlet-name>org.foo.rest.MyApplication</servlet-name>
        <url-pattern>/resources</url-pattern>
    </servlet-mapping>
    ...
</web-app>

请参阅其他部署选项here。部署Jersey应用程序有几种不同的方法。

Jersey 2替代ServletContextListener

1 个答案: