RESTEasy提供了對Spring集成的支持，這使我們能夠將Spring bean作為RESTful WebServices公開。

步驟＃1：使用Maven配置RESTEasy + Spring依賴項。

<project xmlns='http:maven.apache.orgPOM4.0.0' xmlns:xsi='http:www.w3.org2001XMLSchema-instance'xsi:schemaLocation='http:maven.apache.orgPOM4.0.0 http:maven.apache.orgmaven-v4_0_0.xsd'><modelVersion>4.0.0<modelVersion><groupId>com.sivalabs<groupId><artifactId>resteasy-demo<artifactId><version>0.1<version><packaging>war<packaging><properties><project.build.sourceEncoding>UTF-8<project.build.sourceEncoding><org.springframework.version>3.1.0.RELEASE<org.springframework.version><slf4j.version>1.6.1<slf4j.version><java.version>1.6<java.version><junit.version>4.8.2<junit.version><resteasy.version>2.3.2.Final<resteasy.version><properties><build><finalName>resteasy-demo<finalName><build><dependencies><dependency><groupId>junit<groupId><artifactId>junit<artifactId><scope>test<scope><dependency><dependency><groupId>org.slf4j<groupId><artifactId>slf4j-api<artifactId><version>${slf4j.version}<version><dependency><dependency><groupId>org.slf4j<groupId><artifactId>jcl-over-slf4j<artifactId><version>${slf4j.version}<version><scope>runtime<scope><dependency><dependency><groupId>org.slf4j<groupId><artifactId>slf4j-log4j12<artifactId><version>${slf4j.version}<version><scope>runtime<scope><dependency><dependency><groupId>log4j<groupId><artifactId>log4j<artifactId><version>1.2.16<version><scope>runtime<scope><dependency><dependency><groupId>org.springframework<groupId><artifactId>spring-context-support<artifactId><version>${org.springframework.version}<version><exclusions><exclusion><artifactId>commons-logging<artifactId><groupId>commons-logging<groupId><exclusion><exclusions><dependency><dependency><groupId>org.springframework<groupId><artifactId>spring-web<artifactId><version>${org.springframework.version}<version><dependency><dependency><groupId>org.jboss.resteasy<groupId><artifactId>resteasy-jaxrs<artifactId><version>${resteasy.version}<version><scope>provided<scope><dependency><dependency><groupId>org.jboss.resteasy<groupId><artifactId>resteasy-jaxb-provider<artifactId><version>${resteasy.version}<version><scope>provided<scope><dependency><dependency><groupId>org.jboss.resteasy<groupId><artifactId>jaxrs-api<artifactId><version>2.3.0.GA<version><scope>provided<scope><dependency><dependency><groupId>org.jboss.resteasy<groupId><artifactId>resteasy-spring<artifactId><version>2.3.0.GA<version><exclusions><exclusion><artifactId>commons-logging<artifactId><groupId>commons-logging<groupId><exclusion><exclusion><artifactId>org.jboss.resteasy<artifactId><groupId>resteasy-jaxb-provider<groupId><exclusion><exclusion><artifactId>jaxb-impl<artifactId><groupId>com.sun.xml.bind<groupId><exclusion><exclusion><artifactId>sjsxp<artifactId><groupId>com.sun.xml.stream<groupId><exclusion><exclusion><artifactId>jsr250-api<artifactId><groupId>javax.annotation<groupId><exclusion><exclusion><artifactId>resteasy-jaxb-provider<artifactId><groupId>org.jboss.resteasy<groupId><exclusion><exclusion><artifactId>activation<artifactId><groupId>javax.activation<groupId><exclusion><exclusions><dependency><dependency><groupId>javax.servlet<groupId><artifactId>servlet-api<artifactId><version>2.5<version><scope>provided<scope><dependency><dependency><groupId>org.apache.httpcomponents<groupId><artifactId>httpclient<artifactId><version>4.1.2<version><dependency><dependencies><project>

步驟＃2：在web.xml中配置RESTEasy + Spring

<web-app xmlns:xsi='http:www.w3.org2001XMLSchema-instance' xmlns='http:java.sun.comxmlnsjavaee' xmlns:web='http:java.sun.comxmlnsjavaeeweb-app_2_5.xsd' xsi:schemaLocation='http:java.sun.comxmlnsjavaee http:java.sun.comxmlnsjavaeeweb-app_3_0.xsd' id='WebApp_ID' version='3.0'><listener><listener-class>org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap<listener-class><listener><listener><listener-class>org.jboss.resteasy.plugins.spring.SpringContextLoaderListener<listener-class><listener><servlet><servlet-name>Resteasy<servlet-name><servlet-class>org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher<servlet-class><servlet><servlet-mapping><servlet-name>Resteasy<servlet-name><url-pattern>rest*<url-pattern><servlet-mapping><context-param><param-name>contextConfigLocation<param-name><param-value>classpath:applicationContext.xml<param-value><context-param><context-param><param-name>resteasy.servlet.mapping.prefix<param-name><param-value>rest<param-value><context-param><context-param><param-name>resteasy.scan<param-name><param-value>true<param-value><context-param><web-app>

步驟＃3：創建Spring Service類UserService并更新UserResource以使用UserService bean。

package com.sivalabs.resteasydemo;import java.util.List;import org.springframework.stereotype.Service;import com.sivalabs.resteasydemo.MockUserTable;@Servicepublic class UserService {public void save(User user){MockUserTable.save(user);}public User getById(Integer id){return MockUserTable.getById(id);}public List<User> getAll(){return MockUserTable.getAll();}public void delete(Integer id){MockUserTable.delete(id);}}package com.sivalabs.resteasydemo;import java.util.List;import javax.ws.rs.Consumes;import javax.ws.rs.DELETE;import javax.ws.rs.GET;import javax.ws.rs.POST;import javax.ws.rs.Path;import javax.ws.rs.PathParam;import javax.ws.rs.Produces;import javax.ws.rs.core.GenericEntity;import javax.ws.rs.core.MediaType;import javax.ws.rs.core.Response;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;@Component@Path('users')@Produces(MediaType.APPLICATION_XML)@Consumes(MediaType.APPLICATION_XML)public class UserResource {@Autowiredprivate UserService userService;@Path('')@GETpublic Response getUsersXML() {List<User> users = userService.getAll();GenericEntity<List<User>> ge = new GenericEntity<List<User>>(users){};return Response.ok(ge).build();}@Path('{id}')@GETpublic Response getUserXMLById(@PathParam('id') Integer id) {User user = userService.getById(id);return Response.ok(user).build();}@Path('')@POSTpublic Response saveUser(User user) {userService.save(user);return Response.ok('<status>success<status>').build();}@Path('{id}')@DELETEpublic Response deleteUser(@PathParam('id') Integer id) {userService.delete(id);return Response.ok('<status>success<status>').build();}}package com.sivalabs.resteasydemo;import java.util.List;import org.springframework.stereotype.Service;import com.sivalabs.resteasydemo.MockUserTable;@Servicepublic class UserService {public void save(User user){MockUserTable.save(user);}public User getById(Integer id){return MockUserTable.getById(id);}public List<User> getAll(){return MockUserTable.getAll();}public void delete(Integer id){MockUserTable.delete(id);}}package com.sivalabs.resteasydemo;import java.util.List;import javax.ws.rs.Consumes;import javax.ws.rs.DELETE;import javax.ws.rs.GET;import javax.ws.rs.POST;import javax.ws.rs.Path;import javax.ws.rs.PathParam;import javax.ws.rs.Produces;import javax.ws.rs.core.GenericEntity;import javax.ws.rs.core.MediaType;import javax.ws.rs.core.Response;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;@Component@Path('users')@Produces(MediaType.APPLICATION_XML)@Consumes(MediaType.APPLICATION_XML)public class UserResource {@Autowiredprivate UserService userService;@Path('')@GETpublic Response getUsersXML() {List<User> users = userService.getAll();GenericEntity<List<User>> ge = new GenericEntity<List<User>>(users){};return Response.ok(ge).build();}@Path('{id}')@GETpublic Response getUserXMLById(@PathParam('id') Integer id) {User user = userService.getById(id);return Response.ok(user).build();}@Path('')@POSTpublic Response saveUser(User user) {userService.save(user);return Response.ok('<status>success<status>').build();}@Path('{id}')@DELETEpublic Response deleteUser(@PathParam('id') Integer id) {userService.delete(id);return Response.ok('<status>success<status>').build();}}applicationContext.xml<?xml version='1.0' encoding='UTF-8'?><beans xmlns='http:www.springframework.orgschemabeans'xmlns:xsi='http:www.w3.org2001XMLSchema-instance'xmlns:p='http:www.springframework.orgschemap'xmlns:context='http:www.springframework.orgschemacontext'xsi:schemaLocation='http:www.springframework.orgschemabeans http:www.springframework.orgschemabeansspring-beans.xsdhttp:www.springframework.orgschemacontext http:www.springframework.orgschemacontextspring-context.xsd'><context:annotation-config><context:component-scan base-package='com.sivalabs.resteasydemo'><beans>

步驟＃4：使用相同的JUnit TestCase來測試第1部分中描述的REST Web服務。

package com.sivalabs.resteasydemo;import java.util.List;import org.jboss.resteasy.client.ClientRequest;import org.jboss.resteasy.client.ClientResponse;import org.jboss.resteasy.util.GenericType;import org.junit.Assert;import org.junit.Test;import com.sivalabs.resteasydemo.User;public class UserResourceTest {static final String ROOT_URL = 'http:localhost:8080resteasy-demorest';@Testpublic void testGetUsers() throws Exception {ClientRequest request = new ClientRequest(ROOT_URL+'users');ClientResponse<List<User>> response = request.get(new GenericType<List<User>>(){});List<User> users = response.getEntity();Assert.assertNotNull(users);}@Testpublic void testGetUserById() throws Exception {ClientRequest request = new ClientRequest(ROOT_URL+'users1');ClientResponse<User> response = request.get(User.class);User user = response.getEntity();Assert.assertNotNull(user);}@Testpublic void testSaveUser() throws Exception {User user = new User();user.setId(3);user.setName('User3');user.setEmail('user3@gmail.com');ClientRequest request = new ClientRequest(ROOT_URL+'users');request.body('applicationxml', user);ClientResponse<String> response = request.post(String.class);String statusXML = response.getEntity();Assert.assertNotNull(statusXML);}@Testpublic void testDeleteUser() throws Exception {ClientRequest request = new ClientRequest(ROOT_URL+'users2');ClientResponse<String> response = request.delete(String.class);String statusXML = response.getEntity();Assert.assertNotNull(statusXML);}}

重要注意事項：

1.應當先注冊org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap監聽器。
2.如果HttpServletDispatcher Servlet URL模式不是/ *，則應該配置resteasy.servlet.mapping.prefix @lt; context-param>
3.您應該通過使用@Component或@Service注釋將REST Resource注冊為Spring bean。

參考： RESTEasy教程第2部分：我的JCG合作伙伴 Siva Reddy在“ 技術上的我的實驗”博客上的 Spring Integration 。