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RESTEasy + JBOSS 7 HelloWorld 应用

RESTEasy + JBOSS 7 HelloWorld 应用

原文： https://howtodoinjava.com/resteasy/resteasy-jboss-7-hello-world-application/

RESTEasy 是 JBOSS 提供的 JAX-RS 规范的实现，用于构建 RESTful Web 服务 和 RESTful Java 应用。 尽管这不仅限于仅在 JBOSS 中使用，您还可以与其他服务器协作。 在本文中，我将在 JBOSS AS7 服务器中构建这样的 HelloWorld 应用。

使用的环境：

  1. RESTEasy 2.3.1.GA
  2. Jboss AS7
  3. JDK 1.6

请按照以下步骤构建演示应用。

1）创建一个 Maven 项目并转换为 Eclipse Web 项目

mvn archetype:generate -DgroupId=com.howtodoinjava -DartifactId=RESTfulDemoApplication 
-DarchetypeArtifactId=maven-archetype-webapp -DinteractiveMode=false

mvn eclipse:eclipse -Dwtpversion=2.0

2）更新pom.xml中的运行时依赖项

您只需要定义编译时间相关性。 更好的是，如果您可以识别并包含 jboss 分发包中的 jar。

<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.howtodoinjava</groupId>
  <artifactId>RESTfulDemoApplication</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>RESTfulDemoApplication Maven Webapp</name>
  <url>http://maven.apache.org</url>
  	<repositories>
	   	<repository>
	      <id>jboss</id>
	      <url>http://repository.jboss.org/maven2</url>
	   	</repository>
	</repositories>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <!-- core library -->
	<dependency>
		<groupId>org.jboss.resteasy</groupId>
		 <artifactId>resteasy-jaxrs</artifactId>
		<version>2.3.1.GA</version>
		<scope>compile</scope>
	</dependency>
   <!-- JAXB support -->
   <dependency>
      <groupId>org.jboss.resteasy</groupId>
      	<artifactId>resteasy-jaxb-provider</artifactId>
      <version>2.3.1.GA</version>
      <scope>compile</scope>
   </dependency>
   <!-- multipart/form-data and multipart/mixed support -->
   <dependency>
      <groupId>org.jboss.resteasy</groupId>
      	<artifactId>resteasy-multipart-provider</artifactId>
      <version>2.3.1.GA</version>
      <scope>compile</scope>
   </dependency>
   <dependency>
		<groupId>net.sf.scannotation</groupId>
		<artifactId>scannotation</artifactId>
		<version>1.0.2</version>
		<scope>compile</scope>
	</dependency>
  </dependencies>
  <build>
    <finalName>RESTfulDemoApplication</finalName>
  </build>
</project>

3）创建一个空白的web.xml文件

JBOSS 的内置支持 RESTeasy 使它成为 RESTFul Web 应用的完美组合。 构建此类应用的最低配置为无。 是的，一个空白的web.xml文件。

<!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>Restful Web Application</display-name>
</web-app>

5）注册应用路径

您将需要扩展javax.ws.rs.core.Application类并提供@ApplicationPath注解。

<img src="//howtodoinjava.com/wp-content/uploads/jboss+resteasy1.png" alt="JBOSS 7+ RESTEasy demo application" width="453" height="225" class="size-full wp-image-2033" /> JBOSS 7+ RESTEasy demo applicationpackage com.howtodoinjava;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;

import com.howtodoinjava.service.UserService;

@ApplicationPath("/")
public class ApplicationConfig extends Application {
    @SuppressWarnings("unchecked")
	public Set<Class<?>> getClasses() {
        return new HashSet<Class<?>>(Arrays.asList(UserService.class));
    }
}

4）编写具有@Path注解的服务类

package com.howtodoinjava.service;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;

import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Response;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

import com.howtodoinjava.model.User;
import com.howtodoinjava.model.Users;

@XmlAccessorType(XmlAccessType.NONE)
@XmlRootElement(name = "user-management")
@Path("/user-management")
public class UserService {
	@XmlElement(name = "users")
	private String uri1 = "/user-management/users";

	@XmlElement(name = "report")
	private String uri2 = "/user-managemet/generate-report";

	public String getUri1() {
		return uri1;
	}

	public void setUri1(String uri1) {
		this.uri1 = uri1;
	}

	public String getUri2() {
		return uri2;
	}

	public void setUri2(String uri2) {
		this.uri2 = uri2;
	}

	@GET
	@Path("/")
	@Produces("application/vnd.com.demo.user-management+xml;charset=UTF-8;version=1")
	public UserService getServiceInfo() {
		return new UserService();
	}

	@GET
	@Path("/users")
	@Produces("application/vnd.com.demo.user-management.users+xml;charset=UTF-8;version=1")
	public Users getAllUsers() {
		User user1 = new User();
		user1.setId(1);
		user1.setFirstName("demo");
		user1.setLastName("user");
		user1.setUri("/user-management/users/1");

		User user2 = new User();
		user2.setId(2);
		user2.setFirstName("demo");
		user2.setLastName("user");
		user2.setUri("/user-management/users/2");

		Users users = new Users();
		users.setUsers(new ArrayList<User>());
		users.getUsers().add(user1);
		users.getUsers().add(user2);

		return users;
	}

	@GET
	@Path("/users/{id}")
	@Produces("application/vnd.com.demo.user-management.user+xml;charset=UTF-8;version=1")
	public User getUserById(@PathParam("id") int id) {
		User user = new User();
		user.setId(id);
		user.setFirstName("demo");
		user.setLastName("user");
		user.setUri("/user-management/users/" + id);
		return user;
	}

	@POST
	@Path("/users")
	@Consumes("application/vnd.com.demo.user-management.user+xml;charset=UTF-8;version=1")
	public Response createUser(User user,
			@DefaultValue("false") @QueryParam("allow-admin") boolean allowAdmin)
			throws URISyntaxException {
		System.out.println(user.getFirstName());
		System.out.println(user.getLastName());
		return Response.status(201)
				.contentLocation(new URI("/user-management/users/123")).build();
	}

	@PUT
	// @Path("/users/{id: [0-9]*}")
	@Path("/users/{id}")
	@Consumes("application/vnd.com.demo.user-management.user+xml;charset=UTF-8;version=1")
	@Produces("application/vnd.com.demo.user-management.user+xml;charset=UTF-8;version=1")
	public User updateUser(@PathParam("id") int id, User user)
			throws URISyntaxException {
		user.setId(id);
		user.setFirstName(user.getFirstName() + "updated");
		return user;
	}

	@DELETE
	@Path("/users/{id}")
	public Response deleteUser(@PathParam("id") int id)
			throws URISyntaxException {
		return Response.status(200).build();
	}
}

5）运行应用

当我们在 jboss 中部署以上构建的应用并单击 URL：“http://localhost:8080/RESTfulDemoApplication/user-management/users”时，以下是响应。

JBOSS 7+ RESTEasy demo application

JBOSS 7+ RESTEasy 示例应用

要下载以上示例的源代码，请单击下面的链接。

下载源代码

祝您学习愉快！

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