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网站上的通话功能怎么做,如何评价一个企业网站做的好,网站底部备案号悬挂,网站模板无忧1.什么是olingo#xff1f; Apache Olingo 是个 Java 库#xff0c;用来实现 Open Data Protocol (OData)。 Apache Olingo 包括服务客户端和 OData 服务器方面。 Open Data Protocol #xff08;开放数据协议#xff0c;OData#xff09; 是用来查询和更新数据的一种W…1.什么是olingo Apache Olingo 是个 Java 库用来实现 Open Data Protocol (OData)。 Apache Olingo 包括服务客户端和 OData 服务器方面。 Open Data Protocol 开放数据协议OData 是用来查询和更新数据的一种Web协议其提供了把存在于应用程序中的数据暴露出来的方式。OData运用且构建于很多 Web技术之上比如HTTP、Atom Publishing ProtocolAtomPub和JSON提供了从各种应用程序、服务和存储库中访问信息的能力。OData被用来从各种数据源中暴露和访问信息 这些数据源包括但不限于关系数据库、文件系统、内容管理系统和传统Web站点。 2.代码工程 实验目标 利用olingo实现oData协议 pom.xml ?xml version1.0 encodingUTF-8? project xmlnshttp://maven.apache.org/POM/4.0.0xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsdparentartifactIdspringboot-demo/artifactIdgroupIdcom.et/groupIdversion1.0-SNAPSHOT/version/parentmodelVersion4.0.0/modelVersionartifactIdolingo/artifactIdpropertiesmaven.compiler.source8/maven.compiler.sourcemaven.compiler.target8/maven.compiler.target/propertiesdependenciesdependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-autoconfigure/artifactId/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-test/artifactIdscopetest/scope/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-data-jpa/artifactId/dependencydependencygroupIdorg.apache.olingo/groupIdartifactIdolingo-odata2-core/artifactIdversion2.0.11/versionexclusionsexclusiongroupIdjavax.ws.rs/groupIdartifactIdjavax.ws.rs-api/artifactId/exclusion/exclusions/dependencydependencygroupIdorg.apache.olingo/groupIdartifactIdolingo-odata2-jpa-processor-core/artifactIdversion2.0.11/version/dependencydependencygroupIdorg.apache.olingo/groupIdartifactIdolingo-odata2-jpa-processor-ref/artifactIdversion2.0.11/versionexclusionsexclusiongroupIdorg.eclipse.persistence/groupIdartifactIdeclipselink/artifactId/exclusion/exclusions/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-jersey/artifactId/dependency/dependenciesprofilesprofileidlocal/idactivationactiveByDefaulttrue/activeByDefault/activationpropertiesactivatedPropertieslocal/activatedProperties/propertiesdependenciesdependencygroupIdcom.h2database/groupIdartifactIdh2/artifactIdscoperuntime/scope/dependency/dependencies/profileprofileidcloud/idactivationactiveByDefaultfalse/activeByDefault/activationpropertiesactivatedPropertiescloud/activatedProperties/properties/profile/profilesbuildpluginsplugingroupIdorg.springframework.boot/groupIdartifactIdspring-boot-maven-plugin/artifactId/plugin/plugins/build /project config package com.et.olingo.config;import com.et.olingo.service.OdataJpaServiceFactory; import org.apache.olingo.odata2.api.ODataServiceFactory; import org.apache.olingo.odata2.core.rest.ODataRootLocator; import org.apache.olingo.odata2.core.rest.app.ODataApplication; import org.glassfish.jersey.server.ResourceConfig; import org.springframework.stereotype.Component;import javax.inject.Inject; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.EntityTransaction; import javax.servlet.http.HttpServletRequest; import javax.ws.rs.ApplicationPath; import javax.ws.rs.Path; import javax.ws.rs.container.ContainerRequestContext; import javax.ws.rs.container.ContainerRequestFilter; import javax.ws.rs.container.ContainerResponseContext; import javax.ws.rs.container.ContainerResponseFilter; import javax.ws.rs.core.Context; import javax.ws.rs.ext.Provider; import java.io.IOException;Component ApplicationPath(/odata) public class JerseyConfig extends ResourceConfig {public JerseyConfig(OdataJpaServiceFactory serviceFactory, EntityManagerFactory entityManagerFactory) {ODataApplication oDataApplication new ODataApplication();oDataApplication.getClasses().forEach( c - {if ( !ODataRootLocator.class.isAssignableFrom©) {register©;}});register(new ODataServiceRootLocator(serviceFactory));register(new EntityManagerFilter(entityManagerFactory));}Path(/)public static class ODataServiceRootLocator extends ODataRootLocator {private OdataJpaServiceFactory serviceFactory;Injectpublic ODataServiceRootLocator (OdataJpaServiceFactory serviceFactory) {this.serviceFactory serviceFactory;}Overridepublic ODataServiceFactory getServiceFactory() {return this.serviceFactory;}}Providerpublic static class EntityManagerFilter implements ContainerRequestFilter,ContainerResponseFilter {public static final String EM_REQUEST_ATTRIBUTE EntityManagerFilter.class.getName() _ENTITY_MANAGER;private final EntityManagerFactory entityManagerFactory;Contextprivate HttpServletRequest httpRequest;public EntityManagerFilter(EntityManagerFactory entityManagerFactory) {this.entityManagerFactory entityManagerFactory;}Overridepublic void filter(ContainerRequestContext containerRequestContext) throws IOException {EntityManager entityManager this.entityManagerFactory.createEntityManager();httpRequest.setAttribute(EM_REQUEST_ATTRIBUTE, entityManager);if (!GET.equalsIgnoreCase(containerRequestContext.getMethod())) {entityManager.getTransaction().begin();}}Overridepublic void filter(ContainerRequestContext requestContext,ContainerResponseContext responseContext) throws IOException {EntityManager entityManager (EntityManager) httpRequest.getAttribute(EM_REQUEST_ATTRIBUTE);if (!GET.equalsIgnoreCase(requestContext.getMethod())) {EntityTransaction entityTransaction entityManager.getTransaction(); //we do not commit because its just a READif (entityTransaction.isActive() !entityTransaction.getRollbackOnly()) {entityTransaction.commit();}}entityManager.close();}}} controller package com.et.olingo.controller;import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController;import java.util.HashMap; import java.util.Map;RestController public class HelloWorldController {RequestMapping(/hello)public MapString, Object showHelloWorld(){MapString, Object map new HashMap();map.put(msg, HelloWorld);return map;} } entity service package com.et.olingo.service;import com.et.olingo.entity.Child; import org.apache.olingo.odata2.api.edm.EdmException; import org.apache.olingo.odata2.api.ep.EntityProviderException; import org.apache.olingo.odata2.api.exception.ODataException; import org.apache.olingo.odata2.api.exception.ODataNotFoundException; import org.apache.olingo.odata2.api.processor.ODataResponse; import org.apache.olingo.odata2.api.uri.info.*; import org.apache.olingo.odata2.jpa.processor.api.ODataJPAContext; import org.apache.olingo.odata2.jpa.processor.api.ODataJPADefaultProcessor; import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPAModelException; import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPARuntimeException; import org.slf4j.Logger; import org.slf4j.LoggerFactory;import java.io.InputStream; import java.util.List;public class CustomODataJpaProcessor extends ODataJPADefaultProcessor {private Logger logger LoggerFactory.getLogger(getClass());public CustomODataJpaProcessor(ODataJPAContext oDataJPAContext) {super(oDataJPAContext);}Overridepublic ODataResponse readEntitySet(final GetEntitySetUriInfo uriParserResultView, final String contentType) throws ODataJPAModelException, ODataJPARuntimeException, EdmException {logger.info(READ: Entity Set {} called, uriParserResultView.getTargetEntitySet().getName());try {ListObject jpaEntities jpaProcessor.process(uriParserResultView);return responseBuilder.build(uriParserResultView, jpaEntities, contentType);} finally {this.close();}}Overridepublic ODataResponse readEntity(final GetEntityUriInfo uriParserResultView, final String contentType) throws ODataJPAModelException, ODataJPARuntimeException, ODataNotFoundException, EdmException {ODataResponse response null;if (uriParserResultView.getKeyPredicates().size() 1) {logger.info(READ: Entity {} called with key {} and key {}, uriParserResultView.getTargetEntitySet().getName(), uriParserResultView.getKeyPredicates().get(0).getLiteral(), uriParserResultView.getKeyPredicates().get(1).getLiteral());} else {logger.info(READ: Entity {} called with key {}, uriParserResultView.getTargetEntitySet().getName(), uriParserResultView.getKeyPredicates().get(0).getLiteral());}try {Object readEntity jpaProcessor.process(uriParserResultView);response responseBuilder.build(uriParserResultView, readEntity, contentType);} finally {this.close();}return response;}Overridepublic ODataResponse createEntity(final PostUriInfo uriParserResultView, final InputStream content, final String requestContentType, final String contentType) throws ODataJPAModelException, ODataJPARuntimeException, ODataNotFoundException, EdmException, EntityProviderException {logger.info(POST: Entity {} called, uriParserResultView.getTargetEntitySet().getName());ODataResponse response null;try {Object createdEntity jpaProcessor.process(uriParserResultView, content, requestContentType);if (createdEntity.getClass().equals(Child.class)) {response postProcessCreateChild(createdEntity, uriParserResultView, contentType);} else {response responseBuilder.build(uriParserResultView, createdEntity, contentType);}} finally {this.close();}return response;}Overridepublic ODataResponse updateEntity(final PutMergePatchUriInfo uriParserResultView, final InputStream content,final String requestContentType, final boolean merge, final String contentType) throws ODataException, ODataJPAModelException, ODataJPARuntimeException, ODataNotFoundException {logger.info(PUT: Entity {} called with key {}, uriParserResultView.getTargetEntitySet().getName(), uriParserResultView.getKeyPredicates().get(0).getLiteral());ODataResponse response null;try {Object updatedEntity jpaProcessor.process(uriParserResultView, content, requestContentType);response responseBuilder.build(uriParserResultView, updatedEntity);} finally {this.close();}return response;}Overridepublic ODataResponse deleteEntity(DeleteUriInfo uriParserResultView, String contentType) throws ODataException {logger.info(DELETE: Entity {} called with key {}, uriParserResultView.getTargetEntitySet().getName(), uriParserResultView.getKeyPredicates().get(0).getLiteral());ODataResponse oDataResponse null;try {this.oDataJPAContext.setODataContext(this.getContext());Object deletedEntity this.jpaProcessor.process(uriParserResultView, contentType);oDataResponse this.responseBuilder.build(uriParserResultView, deletedEntity);} finally {this.close();}return oDataResponse;}private ODataResponse postProcessCreateChild(Object createdEntity, PostUriInfo uriParserResultView, String contentType) throws ODataJPARuntimeException, ODataNotFoundException {Child child (Child) createdEntity;if (child.getSurname() null || child.getSurname().equalsIgnoreCase()) {if (child.getMother().getSurname() ! null !child.getMother().getSurname().equalsIgnoreCase()) {child.setSurname(child.getMother().getSurname());} else if (child.getMother().getSurname() ! null !child.getFather().getSurname().equalsIgnoreCase()) {child.setSurname(child.getFather().getSurname());} else {child.setSurname(Gashi);}}return responseBuilder.build(uriParserResultView, createdEntity, contentType);}} package com.et.olingo.service;import com.et.olingo.config.JerseyConfig; import org.apache.olingo.odata2.api.ODataService; import org.apache.olingo.odata2.api.ODataServiceFactory; import org.apache.olingo.odata2.api.edm.provider.EdmProvider; import org.apache.olingo.odata2.api.exception.ODataException; import org.apache.olingo.odata2.api.processor.ODataContext; import org.apache.olingo.odata2.api.processor.ODataSingleProcessor; import org.apache.olingo.odata2.jpa.processor.api.ODataJPAContext; import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPARuntimeException; import org.apache.olingo.odata2.jpa.processor.api.factory.ODataJPAAccessFactory; import org.apache.olingo.odata2.jpa.processor.api.factory.ODataJPAFactory;import javax.persistence.EntityManager; import javax.servlet.http.HttpServletRequest;public class CustomODataServiceFactory extends ODataServiceFactory {private ODataJPAContext oDataJPAContext;private ODataContext oDataContext;Overridepublic final ODataService createService(final ODataContext context) throws ODataException {oDataContext context;oDataJPAContext initializeODataJPAContext();validatePreConditions();ODataJPAFactory factory ODataJPAFactory.createFactory();ODataJPAAccessFactory accessFactory factory.getODataJPAAccessFactory();if (oDataJPAContext.getODataContext() null) {oDataJPAContext.setODataContext(context);}ODataSingleProcessor oDataSingleProcessor new CustomODataJpaProcessor(oDataJPAContext);EdmProvider edmProvider accessFactory.createJPAEdmProvider(oDataJPAContext);return createODataSingleProcessorService(edmProvider, oDataSingleProcessor);}private void validatePreConditions() throws ODataJPARuntimeException {if (oDataJPAContext.getEntityManager() null) {throw ODataJPARuntimeException.throwException(ODataJPARuntimeException.ENTITY_MANAGER_NOT_INITIALIZED, null);}}public final ODataJPAContext getODataJPAContext()throws ODataJPARuntimeException {if (oDataJPAContext null) {oDataJPAContext ODataJPAFactory.createFactory().getODataJPAAccessFactory().createODataJPAContext();}if (oDataContext ! null)oDataJPAContext.setODataContext(oDataContext);return oDataJPAContext;}protected ODataJPAContext initializeODataJPAContext() throws ODataJPARuntimeException {ODataJPAContext oDataJPAContext this.getODataJPAContext();ODataContext oDataContext oDataJPAContext.getODataContext();HttpServletRequest request (HttpServletRequest) oDataContext.getParameter(ODataContext.HTTP_SERVLET_REQUEST_OBJECT);EntityManager entityManager (EntityManager) request.getAttribute(JerseyConfig.EntityManagerFilter.EM_REQUEST_ATTRIBUTE);oDataJPAContext.setEntityManager(entityManager);oDataJPAContext.setPersistenceUnitName(default);oDataJPAContext.setContainerManaged(true);return oDataJPAContext;} } package com.et.olingo.service;import org.springframework.stereotype.Component;Component public class OdataJpaServiceFactory extends CustomODataServiceFactory {//need this wrapper class for the spring framework, otherwise we face issues when auto wiring directly the CustomODataServiceFactory } application.yaml spring.h2.console.enabledtrue spring.h2.console.path/console 以上只是一些关键代码所有代码请参见下面代码仓库 代码仓库 GitHub - Harries/springboot-demo: a simple springboot demo with some components for example: redis,solr,rockmq and so on. 3.测试 启动spring Boot应用 元数据查看 http://localhost:8080/odata/$metadata 插入 查询 4.引用 https://github.com/ECasio/olingo-spring-exampleApache Olingo LibrarySpring Boot集成olingo快速入门demo | Harries Blog™