（九）二进制文件在webservice中的处理（以DataHandler方式）

一、需求

• 1. 客户端从服务端下载附件
• 2. 客户端上传附件到服务端

二、案例

• 本章通过DataHander的方式来进行传递。
  
       注意：   1：接口中要定义@MTOM
  
          2:方法中要使用@XmlMimeType(value = "application/octet-stream")

• 服务端

　　2.1　　编写服务接口

package com.webservice;

import javax.activation.DataHandler;
import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;
import javax.xml.bind.annotation.XmlMimeType;
import javax.xml.ws.soap.MTOM;

/**
 * 设置AttachementPart中MIME的功能
 * 
 * 
 * 1：在接口中开启@MTOM注解。
 * 
 * 2：在方法中加上@XmlMimeType(value = "application/octet-stream")
 * 
 */
@WebService
@MTOM
public interface IFileDataHandler {
    @WebResult(name = "sendServerImageResult")
    @XmlMimeType(value = "application/octet-stream")
    public DataHandler sendServerImage();

    public void receiveClientImage(@WebParam(name = "dataHandler")
    @XmlMimeType(value = "application/octet-stream")
    DataHandler dataHandler, @WebParam(name = "filename")
    String filename);
}

　　2.2　　实现服务接口

package com.webservice;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.jws.WebService;

import org.apache.commons.io.IOUtils;

@WebService(endpointInterface = "com.webservice.IFileDataHandler")
public class SendFileDataHandler implements IFileDataHandler {

    public DataHandler sendServerImage() {
        File file = new File("E:\server\jQuery1.4 API-20100204.chm");

        DataSource dataSource = new FileDataSource(file);
        DataHandler dataHandler = new DataHandler(dataSource);
        return dataHandler;
    }

    public void receiveClientImage(DataHandler dataHandler, String filename) {
        OutputStream outputStream = null;
        try {
            outputStream = new FileOutputStream("E:\server\" + filename + "");
            dataHandler.writeTo(outputStream);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeQuietly(outputStream);
        }
    }
}

　　2.3　　发布服务

package com.webservice;

import javax.xml.ws.Endpoint;

public class TestPublish {
    public static void main(String[] args) {
        Endpoint.publish("http://localhost:5050/sendDataHandler",
                new SendFileDataHandler());

        System.out.println("服务发布成功...");
    }
}

• 　　客户端

　　2.4　　测试

package com.file_handler;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;

public class TestMain {
    public static void main(String[] args) {
        //TestMain.getServerFile();

        TestMain.sendClientFile();
    }

    /**
     * 接收服务端发送的文件
     */
    private static void getServerFile() {
        IFileDataHandler dataService = new SendFileDataHandlerService()
                .getSendFileDataHandlerPort();

        DataHandler dataHandler = dataService.sendServerImage();

        try {
            dataHandler.writeTo(new FileOutputStream("E:\client\test.chm"));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    private static void sendClientFile() {
        IFileDataHandler dataService = new SendFileDataHandlerService()
                .getSendFileDataHandlerPort();
        String filename = "Storm.zip";

        DataSource dataSource = new FileDataSource(new File("E:\client\"
                + filename + ""));
        DataHandler dataHandler = new DataHandler(dataSource);

        dataService.receiveClientImage(dataHandler, filename);
    }

}