Dubbo+RestEasy实现文件上传与下载

Dubbo+RestEasy实现文件上传与下载

通过JBOSS WILDLFY服务器，利用jboss resteasy实现文件流方式的上传与下载，方便、简洁。

Maven依赖

    <dependency>
      <groupId>org.jboss.resteasy</groupId>
      <artifactId>resteasy-jaxrs</artifactId>
    </dependency>
    <dependency>
      <groupId>org.jboss.resteasy</groupId>
      <artifactId>resteasy-client</artifactId>
    </dependency>
    <dependency>
      <groupId>org.jboss.resteasy</groupId>
      <artifactId>resteasy-jackson-provider</artifactId>
    </dependency>
    <dependency>
      <groupId>org.jboss.resteasy</groupId>
      <artifactId>resteasy-jaxb-provider</artifactId>
    </dependency>
    <dependency>
      <groupId>org.jboss.resteasy</groupId>
      <artifactId>resteasy-multipart-provider</artifactId>
      <version>3.0.9.Final</version>
    </dependency>

注解

 1. @MultipartForm  -- 将http请求转化为类的对象
 2. @Consumes("multipart/form-data") -- 只接收MIME TYPE为multipart/form-data的请求

代码实现

1、 上传

上传Rest接口方法

	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.MediaType;	
	import org.jboss.resteasy.annotations.providers.multipart.MultipartForm;
	import com.sf.framework.domain.Result;
	...
	@POST
	@Path("upload")
	@Consumes(MediaType.MULTIPART_FORM_DATA)
	Result<String> uploadData(@MultipartForm UploadFileParaRequest request);

上传接口实现

   @Override
   public Result<String> uploadData(UploadFileParaRequest request) {
   	Result<String> result = new Result<>(true);
   	try {
   		// 文件存储路径
   		String fileSavePath = "e://demo/";
   		// 存储文件
   		saveFile(request.getFileData(), fileSavePath);
   		// 返回数据
   		result.setObj(fileSavePath );
   	}  catch (Exception e) {
   		result.setSuccess(false);
   		result.setErrorCode(ErrorCode.SYSTEM_EXCEPTION);
   		result.setErrorMessage("系统异常");
   	}

   	return result;
   }

2、 下载

下载Rest接口方法

	import javax.ws.rs.Consumes;
	import javax.ws.rs.POST;
	import javax.ws.rs.Path;
	import javax.ws.rs.core.MediaType;
	import javax.ws.rs.core.Response;
	import org.jboss.resteasy.annotations.providers.multipart.MultipartForm;
	
	@POST
	@Path("download")
	@Consumes(MediaType.MULTIPART_FORM_DATA)
	@Produces("application/zip")
	Response downloadData(@MultipartForm DownloadRequest request);

下载接口实现

   @Override
   public Response downloadData(DownloadRequest request) {
   	ResponseBuilder response = Response.status(Status.OK);
   	try {
   		// 校验请求参数
   		if (request == null || StringUtils.isEmpty(request.getFilePath())) {
   			throw new BusinessException("文件路径为空", ErrorCode.NULL_DOWNLOAD_REQUEST_PARAM);
   		}

   		File file = new File(request.getFilePath());
   		response = Response.ok((Object) file);
   	} catch (Exception e) {
   		response.status(Status.BAD_REQUEST);
   	}

   	return response.build();
   }

3、 上传、下载请求参数对象

   import java.io.Serializable;
   import java.util.Arrays;
   import javax.ws.rs.FormParam;
   import org.jboss.resteasy.annotations.providers.multipart.PartType;
   
   public class UploadFileParaRequest implements Serializable {
   		private static final long serialVersionUID = 1L;
   		
   		// 文件内容
   		@FormParam("fileData")
   		private byte[] fileData;
   	
   		public byte[] getFileData() {
   			return fileData;
   		}
   	
   		@FormParam("file")
   	    @PartType("application/octet-stream")
   		public void setFileData(byte[] fileData) {
   			this.fileData = fileData; 
   		}
   }

   import java.io.Serializable;
   import javax.ws.rs.FormParam;
   
   public class DownloadRequest implements Serializable {
   		private static final long serialVersionUID = 1L;
   	
   		// 文件路径
   		@FormParam("filePath")
   		private String filePath;
   	
   		public String getFilePath() {
   			return filePath;
   		}
   	
   		public void setFilePath(String filePath) {
   			this.filePath = filePath;
   		}
   }

测试

使用postman测试，设置body为“form-data”，选择待上传文件（zip）即可；下载接口选择“download”发送请求。