Question

我是Jersey的新手，并试图使用Tomcat和eclipse建立一个基本的webapp。我查看了很多教程和示例，但它们彼此不同，或省略了部分过程（例如使用Spring，使用web.xml文件，部署非Jersey应用程序） Tomcat等。）。

这是我到目前为止的地方：

我在eclipse中创建了一个名为TestProject的动态Web项目，并将其转换为maven项目。

这是我的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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>test</groupId>
<artifactId>test</artifactId>
<version>0.0.1-SNAPSHOT</version>

<packaging>war</packaging>

<build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.3</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.6</version>
            <configuration>
                <warSourceDirectory>WebContent</warSourceDirectory>
                <failOnMissingWebXml>false</failOnMissingWebXml>
            </configuration>
        </plugin>
    </plugins>
</build>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <jersey.version>2.23.1</jersey.version>
</properties>

<dependencies>

    <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-server</artifactId>
        <version>${jersey.version}</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet</artifactId>
        <version>${jersey.version}</version>
        <scope>provided</scope>
    </dependency>

    <!-- POJO to JSON support -->
    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-json-jackson</artifactId>
        <version>${jersey.version}</version>
    </dependency>

    <!-- required to run without web.xml on Tomcat -->
    <dependency>
        <groupId>org.glassfish.jersey.bundles</groupId>
        <artifactId>jaxrs-ri</artifactId>
        <version>${jersey.version}</version>
    </dependency>

</dependencies>

我有一个包{3}}，其中包含3个类：

com.test创建没有web.xml的应用程序：

TestApplication

@ApplicationPath("/*") public class TestApplication extends ResourceConfig { public TestApplication(){ packages("com.test"); register(JacksonFeature.class); } }作为最小资源类：

TestProvider

@Path("/test") public class TestProvider { @GET @Produces("application/json") public Test getTest(){ return new Test(); } }作为以JSON格式返回的最小对象：

Test

我有一个运行Tomcat服务器，项目已添加为Web模块。如果我运行项目（运行为＆gt;在服务器上运行），并导航到public class Test { private String field = "test"; }或http://localhost:8080/test我会得到一个标准的tomcat 404。

这是我的Tomcat启动日志：

http://localhost:8080/TestProject/test

如果我使用注释jun 14, 2016 11:29:06 PM org.apache.tomcat.util.digester.SetPropertiesRule begin WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:TestProject' did not find a matching property. jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Server version: Apache Tomcat/8.0.35 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Server built: May 11 2016 21:57:08 UTC jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Server number: 8.0.35.0 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: OS Name: Windows 7 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: OS Version: 6.1 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Architecture: amd64 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Java Home: C:\Program Files\Java\jre1.8.0_71 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: JVM Version: 1.8.0_71-b15 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: JVM Vendor: Oracle Corporation jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: CATALINA_BASE: C:\Users\tim\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: CATALINA_HOME: C:\Users\tim\workspace\apache-tomcat-8.0.35 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Command line argument: -Dcatalina.base=C:\Users\tim\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Command line argument: -Dcatalina.home=C:\Users\tim\workspace\apache-tomcat-8.0.35 jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Command line argument: -Dwtp.deploy=C:\Users\tim\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Command line argument: -Djava.endorsed.dirs=C:\Users\tim\workspace\apache-tomcat-8.0.35\endorsed jun 14, 2016 11:29:06 PM org.apache.catalina.startup.VersionLoggerListener log INFO: Command line argument: -Dfile.encoding=Cp1252 jun 14, 2016 11:29:06 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre1.8.0_71\bin;C:\windows\Sun\Java\bin;C:\windows\system32;C:\windows;C:/Program Files/Java/jre1.8.0_71/bin/server;C:/Program Files/Java/jre1.8.0_71/bin;C:/Program Files/Java/jre1.8.0_71/lib/amd64;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\ImageMagick-6.9.1-Q16;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\ProgramFiles\apache-maven-3.2.5\bin;C:\Program Files (x86)\Skype\Phone\;C:\Program Files\eclipse;;. jun 14, 2016 11:29:06 PM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-nio-8080"] jun 14, 2016 11:29:06 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector INFO: Using a shared selector for servlet write/read jun 14, 2016 11:29:06 PM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["ajp-nio-8009"] jun 14, 2016 11:29:06 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector INFO: Using a shared selector for servlet write/read jun 14, 2016 11:29:06 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 941 ms jun 14, 2016 11:29:06 PM org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina jun 14, 2016 11:29:06 PM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/8.0.35 jun 14, 2016 11:29:07 PM org.apache.catalina.util.SessionIdGeneratorBase createSecureRandom INFO: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [187] milliseconds. jun 14, 2016 11:29:07 PM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["http-nio-8080"] jun 14, 2016 11:29:07 PM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["ajp-nio-8009"] jun 14, 2016 11:29:07 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 668 ms创建非球衣HttpServlet，我会在@WebServlet(name="hello",urlPatterns={"/hello"})得到回复。

我错过了什么？此外，上述任何一种不是最佳实践＆＃39;对于基本的Web应用程序？看来这项技术变化很快，很难知道哪些例子或方法已经过时。

Answer 1

Jersey 2 Tomcat 8，Java 8＆amp; Servlet 3.0基本最小配置

http://localhost：{port}访问tomcat管理器。您可以登录以查找上下文路径。

访问您的申请：

http://localhost：{端口} / {上下文路径} / {URL模式} / {资源路径}

<强>的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 
    http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>jersey2</groupId>
  <artifactId>jersey2</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <build>
    <sourceDirectory>src</sourceDirectory>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.3</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.6</version>
        <configuration>
          <warSourceDirectory>WebContent</warSourceDirectory>
          <failOnMissingWebXml>false</failOnMissingWebXml>
        </configuration>
      </plugin>
    </plugins>
  </build>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <jersey.version>2.23.1</jersey.version>
</properties>

<dependencies>

    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-json-jackson</artifactId>
        <version>${jersey.version}</version>
    </dependency>

    <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-server</artifactId>
        <version>${jersey.version}</version>
    </dependency>

    <dependency>
       <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet</artifactId>
        <version>${jersey.version}</version>
    </dependency>

</dependencies>

<强>应用

package com.test;

import javax.ws.rs.ApplicationPath;
import org.glassfish.jersey.jackson.JacksonFeature;
import org.glassfish.jersey.server.ResourceConfig;

@ApplicationPath("/*")
public class TestApplication extends ResourceConfig {

    public TestApplication(){
        packages("com.test");
        register(JacksonFeature.class);
    }

}

<强>资源

package com.test;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;

@Path("/test")
public class TestResource {

    @GET
    @Produces("application/json")
    public Test getTest(){
        Test bean = new Test();
        bean.setName("Jersey");
        bean.setVersion("2.0");
        bean.setServlet("3.0");
        return bean;
    }

}

测试Bean

package com.test;

public class Test {

  private String name;
  private String version;
  private String servlet;

  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public String getVersion() {
    return version;
  }

  public void setVersion(String version) {
    this.version = version;
  }

  public String getServlet() {
    return servlet;
  }

  public void setServlet(String servlet) {
    this.servlet = servlet;
  }
}

Answer 2

添加答案，如果你使用的是杰克逊，那么依赖已被提及为jersey-media-json-jackson -

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jackson</artifactId>
    <version>${jersey.version}</version>
</dependency>

还有其他json提供商。

如果要将MOXy用作JAXB实现，则可以使用

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-moxy</artifactId>
    <version>${jersey.version}</version>
</dependency>

要使用JSON-P作为JSON提供程序，您需要添加

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-processing</artifactId>
    <version>${jersey.version}</version>
</dependency>

要将Jettison用作JSON提供程序，您需要将jersey-media-json-jettison模块添加到pom.xml文件中：

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-json-jettison</artifactId>
    <version>${jersey.version}</version>
</dependency>

要使用多部分功能，您需要将jersey-media-multipart模块添加到pom.xml文件中：

<dependency>
    <groupId>org.glassfish.jersey.media</groupId>
    <artifactId>jersey-media-multipart</artifactId>
    <version>${jersey.version}</version>
</dependency>

更多详情，请参阅https://jersey.java.net/documentation/latest/media.html

在eclipse中Tomcat上的Jersey的基本完整配置

2 个答案: