用maven创建基于wink的rest服务-下载zip文件的post请求(五)

Apache Wink是一个用于帮助开发者快速高效的开发RESTful Web services服务的java框架,他包括一个服务器端模块和一个客户端模块.
1.创建基于wink的web服务.

  a.用maven构建rest服务器端项目,直接看代码pom.xml.

<span style="font-size:12px;"><?xml version="1.0" encoding="UTF-8"?><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/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.ilucky.rest</groupId><artifactId>rest-server</artifactId><version>1.0.0</version><packaging>war</packaging><dependencies><dependency><groupId>org.apache.wink</groupId><artifactId>wink-server</artifactId><version>1.3.0</version></dependency> <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-log4j12</artifactId>            <version>1.7.3</version>        </dependency></dependencies></project></span>

  b.将cmd窗口切换到rest-server目录下执行mvn eclipse:myeclipse-clean eclipse:myeclipse命令下载pom.xml文件中配置的类库.

  c.在web.xml中将所有rest服务映射到RestServerApplication中,rest通过Application管理所有服务,直接看代码RestServerApplication.

<span style="font-size:12px;">package com.iluck.rest.server;import java.util.HashSet;import java.util.Set;import javax.ws.rs.core.Application;/** * @author IluckySi * @date 20140802 */public class RestServerApplication extends Application {private Set<Object> svc_singletons = new HashSet<Object>();private Set<Class<?>> svc_classes  = new HashSet<Class<?>>();public RestServerApplication() {svc_singletons.add(RestServerServiceImpl.getInstance());}@Overridepublic Set<Object> getSingletons() {return svc_singletons;}@Overridepublic Set<Class<?>> getClasses() {return svc_classes;}}</span>

  d.创建rest服务,直接看代码RestServerService.

<span style="font-size:12px;">package com.iluck.rest.server;import javax.ws.rs.Consumes;import javax.ws.rs.POST;import javax.ws.rs.Path;import javax.ws.rs.Produces;import javax.ws.rs.core.Response;/** * @author IluckySi * @date 20140802 */@Path("/download")public interface RestServerService {@POST@Produces("*;charset=UTF-8")@Consumes("*;charset=UTF-8")public Response download(String userInfo);}</span>

<span style="font-size:12px;">package com.iluck.rest.server;import java.io.File;import java.io.FileInputStream;import javax.ws.rs.core.MediaType;import javax.ws.rs.core.Response;import javax.ws.rs.core.Response.ResponseBuilder;/** * @author IluckySi * @date 20140802 */public class RestServerServiceImpl implements RestServerService {private static RestServerServiceImpl instance = null;;public synchronized static RestServerServiceImpl getInstance() {if(instance == null) {instance = new RestServerServiceImpl();}return instance;}public Response download(String message) {System.out.println("rest服务接收指令:" + message);Response response = null;FileInputStream fis = null;try {File file = new File("E:/sdx.zip");fis = new FileInputStream(file);ResponseBuilder responseBuilder = Response.ok(fis, MediaType.APPLICATION_OCTET_STREAM_TYPE);        response = responseBuilder.header("test", "test").build();} catch (Exception e) {System.out.println("下载文件失败!");}        return response;}}/**输出结果:rest服务接收指令:download*/</span>

2.创建基于wink的java客户端.

  a.用maven构建rest客户端项目,直接看代码pom.xml.

<span style="font-size:12px;"><?xml version="1.0" encoding="UTF-8"?><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/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.ilucky.rest</groupId><artifactId>rest-client</artifactId><version>1.0.0</version><dependencies><dependency><groupId>org.apache.wink</groupId><artifactId>wink-client</artifactId><version>1.3.0</version></dependency><dependency><groupId>com.google.code.gson</groupId><artifactId>gson</artifactId><version>2.2.4</version></dependency> <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-log4j12</artifactId>            <version>1.7.3</version>        </dependency>        </dependencies></project></span>

  b.将cmd窗口切换到rest-client目录下执行mvn eclipse:myeclipse-clean eclipse:myeclipse命令下载pom.xml文件中配置的类库.

  c.创建rest客户端,直接看代码RestClientService

.

<span style="font-size:12px;">package com.ilucky.rest.client;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.util.List;import java.util.Map;import org.apache.wink.client.ClientResponse;import org.apache.wink.client.EntityType;import org.apache.wink.client.Resource;import org.apache.wink.client.RestClient;/** * @author IluckySi * @date 20140802 */public class RestClientService {public static void main(String[] args)  {//创建rest客户端.RestClient restClient = new RestClient();    Resource resource = restClient.resource("http://127.0.0.1:8080/rest-server/rest/download");final ClientResponse response = resource.post("download");        //接收服务器返回媒体的头信息.Map<String, List<String>> header = response.getHeaders();System.out.println("服务器返回状态: " + response.getStatusCode());System.out.println("服务器返回文件头信息-测试: " + header.get("test"));System.out.println("服务器返回文件头信息-返回大小: " + header.get("Content-Length"));System.out.println("服务器返回文件头信息: " + header);//接收服务器返回媒体流.InputStream is = response.getEntity(new EntityType<InputStream>(){});//将流写入指定文件.save(is);}public static void save(InputStream is) {try {File file = new File("E:/temp/ilucky.zip");if(!file.exists()) {file.createNewFile();} else {return;}int buffer = 10240;BufferedInputStream bis = null;FileOutputStream fos = null;BufferedOutputStream bos = null;try {bis = new BufferedInputStream(is);fos = new FileOutputStream(file);bos = new BufferedOutputStream(fos, buffer);byte[] buf = new byte[buffer];int length = 0;while ((length = bis.read(buf, 0, buffer)) != -1) {bos.write(buf, 0, length);bos.flush();}} catch (Exception e) {e.printStackTrace();} finally {try {        if(bos != null) {        bos.close();        bos = null;        }        if(fos != null) {        fos.close();        fos = null;        }        if(bis != null) {        bis.close();        bis = null;        }        if(is != null) {        is.close();        is = null;        }        } catch (Exception e) {        System.out.println("关闭流发生问题!");        }}} catch (Exception e) {System.out.println("下载文件发生问题!");}}}/**输出结果:服务器返回状态: 200服务器返回文件头信息-测试: [test]服务器返回文件头信息-返回大小: [672]服务器返回文件头信息: CaseInsensitiveMultivaluedMap [map=[null=HTTP/1.1 200 OK,Content-Length=672,Content-Type=application/octet-stream,Date=Sat, 02 Aug 2014 07:07:01 GMT,Server=Apache-Coyote/1.1,test=test]]*/</span>

3.在web服务端,其中@Produces("*;charset=UTF-8")和@Consumes("*;charset=UTF-8")分别代表服务返回的媒体类型和可接受请求的媒体类型.
  重点:通过如下两行代码可以返回给客户端一个流文件.
  ResponseBuilder responseBuilder = Response.ok(fis, MediaType.APPLICATION_OCTET_STREAM_TYPE);
  Response response = responseBuilder.header("test", "test").build();
4.在java客户端,其中contentType("application/xml;charset=UTF-8").accept("application/xml;charset=UTF-8")分别代表客户端发送的请求
  媒体类型和可接受请求的媒体类型.
  重点:通过如下两行代码可以获取服务器返回流文件的头信息和流文件.
  Map<String, List<String>> header = response.getHeaders();
  InputStream is = response.getEntity(new EntityType<InputStream>(){});