Question

无法从Jersey 2.22.1版本升级到版本2.22.2 层次：

build.gradle的依赖关系部分：

def jerseyVersion = '2.22.1'
def hk2Version = '2.4.0-b31'
def giuceVersion = '4.0'

dependencies {
    //javax
    compile "javax.servlet:javax.servlet-api:3.1.0"
    //jersey
    compile "org.glassfish.jersey.core:jersey-server:${jerseyVersion}"
    compile "org.glassfish.jersey.containers:jersey-container-servlet:${jerseyVersion}"
    //hk2
    compile "org.glassfish.hk2:guice-bridge:${hk2Version}"
    //guice
    compile "com.google.inject:guice:${giuceVersion}"
    compile "com.google.inject.extensions:guice-servlet:${giuceVersion}"
}

文件web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<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">

    <display-name>REST API App</display-name>

    <listener>
        <listener-class>com.example.core.JerseyGuiceServletContextListener</listener-class>
    </listener>

    <filter>
        <filter-name>guiceFilter</filter-name>
        <filter-class>com.google.inject.servlet.GuiceFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>guiceFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

类JerseyGuiceServletContextListener：

package com.example.core;

import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.servlet.GuiceServletContextListener;

public class JerseyGuiceServletContextListener extends GuiceServletContextListener {
    @Override
    protected Injector getInjector() {
        return Guice.createInjector(new JerseyServletModuleConfig());
    }
}

类JerseyServletModuleConfig：

package com.example.core;

import com.google.inject.Scopes;
import com.google.inject.servlet.ServletModule;
import com.example.ws.HeyResource;
import org.glassfish.jersey.servlet.ServletContainer;

import java.util.Map;
import java.util.TreeMap;

class JerseyServletModuleConfig extends ServletModule {
    @Override
    protected void configureServlets() {
        Map<String, String> servletContainerParams = new TreeMap<>();
        servletContainerParams.put("javax.ws.rs.Application", JerseyConfiguration.class.getCanonicalName());
        bind(ServletContainer.class).in(Scopes.SINGLETON);
        filter("/*").through(ServletContainer.class, servletContainerParams);
        bind(HeyResource.class).in(Scopes.SINGLETON);
    }
}

班级泽头配置：

package com.example.core;

import com.google.inject.Injector;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.jersey.server.ResourceConfig;
import org.jvnet.hk2.guice.bridge.api.GuiceBridge;
import org.jvnet.hk2.guice.bridge.api.GuiceIntoHK2Bridge;

import javax.inject.Inject;
import javax.servlet.ServletContext;

class JerseyConfiguration extends ResourceConfig {
    @Inject
    public JerseyConfiguration(ServiceLocator serviceLocator, ServletContext servletContext) {
        packages("com.example.ws");
        GuiceBridge.getGuiceBridge().initializeGuiceBridge(serviceLocator);
        GuiceIntoHK2Bridge guiceBridge = serviceLocator.getService(GuiceIntoHK2Bridge.class);
        guiceBridge.bridgeGuiceInjector((Injector) servletContext.getAttribute(Injector.class.getName()));
    }
}

在版本2.22.1中，泽西岛的一切都很完美。只要我在2.22.2上更改版本 - 我就有例外：

2016年8月21日12：34：12.577严重[localhost-startStop-1] org.apache.catalina.core.StandardContext.filterStart异常启动过滤器guiceFilter java.lang.NullPointerException at org.glassfish.jersey.servlet.init.FilterUrlMappingsProviderImpl.getFilterUrlMappings（FilterUrlMappingsProviderImpl.java:66）在 org.glassfish.jersey.servlet.ServletContainer.init（ServletContainer.java:444）

我认为它可以在guice-bridge版本中涵盖一个问题。我已经从版本2.4.0-b31替换为版本2.4.0-b34（用于来自org.glassfish.jersey.core的各种hk2依赖：jersey-server） - 没有帮助。 / p>

链接到类FilterUrlMappingsProviderImpl：https://github.com/jersey/jersey/blob/79d7767be5102f57520cf23900cad3a7ef4230ad/containers/jersey-servlet/src/main/java/org/glassfish/jersey/servlet/init/FilterUrlMappingsProviderImpl.java

从上面描述的类中，FilterUrlMappingsProviderImpl类清楚地表明不可能获得FilterRegistration类对象。

可能存在什么问题？你能为她的决定提出什么建议？感谢。

Answer 1

<强>解决方案

文件web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<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">

    <display-name>REST API App</display-name>

    <listener>
        <listener-class>com.example.core.JerseyGuiceServletContextListener</listener-class>
    </listener>

    <filter>
        <filter-name>guiceFilter</filter-name>
        <filter-class>com.google.inject.servlet.GuiceFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>guiceFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <filter>
        <filter-name>jerseyFilter</filter-name>
        <filter-class>org.glassfish.jersey.servlet.ServletContainer</filter-class>
        <init-param>
            <param-name>javax.ws.rs.Application</param-name>
            <param-value>com.example.core.JerseyConfiguration</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>jerseyFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

类JerseyServletModuleConfig：

package com.example.core;

import com.google.inject.Scopes;
import com.google.inject.servlet.ServletModule;
import com.example.ws.HeyResource;
import org.glassfish.jersey.servlet.ServletContainer;

import java.util.Map;
import java.util.TreeMap;

class JerseyServletModuleConfig extends ServletModule {
    @Override
    protected void configureServlets() {
        bind(HeyResource.class).in(Scopes.SINGLETON);
    }
}

迁移泽西2.22.1到泽西2.22.2

1 个答案: