# RESTEasy + JBOSS 7 HelloWorld 应用 > 原文： [https://howtodoinjava.com/resteasy/resteasy-jboss-7-hello-world-application/](https://howtodoinjava.com/resteasy/resteasy-jboss-7-hello-world-application/) [**RESTEasy**](http://resteasy.jboss.org/ "resteasy") 是 JBOSS 提供的 JAX-RS 规范的实现，用于构建 [**RESTful Web 服务**](//howtodoinjava.com/restful-web-service/ "RESTEasy tutorials") 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** ```java 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。 ```java <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。 ```java <!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。 ```java <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** ```java 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 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**](https://docs.google.com/file/d/0B7yo2HclmjI4ZmpTcC0wZTJZRTQ/edit?usp=sharing "download resteasy + jboss 7 hellow world application") **祝您学习愉快！**