JAVA基础 - JERSEY简介

た入场券 2023-10-12 11:22 39阅读 0赞

#### 是什么 ####

JERSEY是基于JAVA的、轻量级的、RESTful风格的WEB SERVICES框架，是JAX-RS（JSR311）开源参考实现。 JERSEY框架不只是JAX-RS参考实现，还提供了自己的API，进一步简化了RESTful服务和客户端开发。  
[JERSEY官网：https://eclipse-ee4j.github.io/jersey][JERSEY_https_eclipse-ee4j.github.io_jersey]  
[用户手册：https://eclipse-ee4j.github.io/jersey.github.io/documentation/latest31x/index.html][https_eclipse-ee4j.github.io_jersey.github.io_documentation_latest31x_index.html]

#### 术语 ####

（1）什么是SOAP？SOAP是简单对象访问协议的缩写。它是一种基于XML的消息传递协议，用于在计算机之间交换信息。  
（2）什么是REST？REST是表述性状态传递的缩写，也就是资源在网络中以某种表现形式进行状态转移。它是一种软件架构风格，描述的是在网络中C和S的一种交互形式。  
（3）什么是RESTful？REST 是一组架构约束条件和原则，而满足这些约束条件和原则的应用程序或设计就是 RESTful。  
（4）什么是WEB SERVICES？WEB SERVICES是一种标准，他可以通过SOAP或REST的方式来实现。

JETTY是什么？是SERVLET容器（和TOMCAT类似）。

#### 如何使用 ####

JETTY + JERSEY 可以构建WEB服务。

###### ① 依赖引入 ######

<dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-core</artifactId>
        <version>1.19</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-server</artifactId>
        <version>1.19</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-client</artifactId>
        <version>1.19</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-json</artifactId>
        <version>1.19</version>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey.contribs</groupId>
        <artifactId>jersey-multipart</artifactId>
        <version>1.19</version>
    </dependency>
    
    
    <dependency>
        <groupId>com.sun.jersey.contribs</groupId>
        <artifactId>jersey-spring</artifactId>
        <version>1.19.4</version>
        <exclusions>
           <exclusion>
               <groupId>org.springframework</groupId>
               <artifactId>spring</artifactId>
           </exclusion>
           <exclusion>
               <groupId>org.springframework</groupId>
               <artifactId>spring-core</artifactId>
           </exclusion>
           <exclusion>
               <groupId>org.springframework</groupId>
               <artifactId>spring-web</artifactId>
           </exclusion>
           <exclusion>
               <groupId>org.springframework</groupId>
               <artifactId>spring-beans</artifactId>
           </exclusion>
           <exclusion>
               <groupId>org.springframework</groupId>
               <artifactId>spring-context</artifactId>
           </exclusion>
       </exclusions>
    </dependency>
    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-servlet</artifactId>
        <version>1.19.4</version>
    </dependency>

###### ② 服务端代码 ######

@Path("v2/relationship")
    @Singleton
    @Service
    @Consumes({
        Servlets.JSON_MEDIA_TYPE, MediaType.APPLICATION_JSON})
    @Produces({
        Servlets.JSON_MEDIA_TYPE, MediaType.APPLICATION_JSON})
    public class RelationshipREST {
        
        private static final Logger PERF_LOG = AtlasPerfTracer.getPerfLogger("rest.RelationshipREST");
        private final AtlasRelationshipStore relationshipStore;
        @Inject
        public RelationshipREST(AtlasRelationshipStore relationshipStore) {
        
            this.relationshipStore = relationshipStore;
        }
    
        @POST
        public AtlasRelationship create(AtlasRelationship relationship) throws AtlasBaseException {
        
            AtlasPerfTracer perf = null;
            try {
        
                if (AtlasPerfTracer.isPerfTraceEnabled(PERF_LOG)) {
        
                    perf = AtlasPerfTracer.getPerfTracer(PERF_LOG, "RelationshipREST.create(" + relationship + ")");
                }
                return relationshipStore.create(relationship);
            } finally {
        
                AtlasPerfTracer.log(perf);
            }
        }
    
        @PUT
        public AtlasRelationship update(AtlasRelationship relationship) throws AtlasBaseException {
        
            AtlasPerfTracer perf = null;
            try {
        
                if (AtlasPerfTracer.isPerfTraceEnabled(PERF_LOG)) {
        
                    perf = AtlasPerfTracer.getPerfTracer(PERF_LOG, "RelationshipREST.update(" + relationship + ")");
                }
                return relationshipStore.update(relationship);
            } finally {
        
                AtlasPerfTracer.log(perf);
            }
        }
        
        @GET
        @Path("/guid/{guid}")
        public AtlasRelationshipWithExtInfo getById(@PathParam("guid") String guid,
                                                    @QueryParam("extendedInfo") @DefaultValue("false") boolean extendedInfo)
                                                    throws AtlasBaseException {
        
            Servlets.validateQueryParamLength("guid", guid);
            AtlasPerfTracer perf = null;
            AtlasRelationshipWithExtInfo ret;
            try {
        
                if (AtlasPerfTracer.isPerfTraceEnabled(PERF_LOG)) {
        
                    perf = AtlasPerfTracer.getPerfTracer(PERF_LOG, "RelationshipREST.getById(" + guid + ")");
                }
                if (extendedInfo) {
        
                    ret = relationshipStore.getExtInfoById(guid);
                } else {
        
                    ret = new AtlasRelationshipWithExtInfo(relationshipStore.getById(guid));
                }
                return ret;
            } finally {
        
                AtlasPerfTracer.log(perf);
            }
        }
        @DELETE
        @Path("/guid/{guid}")
        public void deleteById(@PathParam("guid") String guid) throws AtlasBaseException {
        
            Servlets.validateQueryParamLength("guid", guid);
            AtlasPerfTracer perf = null;
            try {
        
                if (AtlasPerfTracer.isPerfTraceEnabled(PERF_LOG)) {
        
                    perf = AtlasPerfTracer.getPerfTracer(PERF_LOG, "RelationshipREST.deleteById(" + guid + ")");
                }
                relationshipStore.deleteById(guid);
            } finally {
        
                AtlasPerfTracer.log(perf);
            }
        }
    }

[JERSEY_https_eclipse-ee4j.github.io_jersey]: https://eclipse-ee4j.github.io/jersey
[https_eclipse-ee4j.github.io_jersey.github.io_documentation_latest31x_index.html]: https://eclipse-ee4j.github.io/jersey.github.io/documentation/latest31x/index.html