xfire webservice返回xml

接口中本来是这么写的：
但是真正的业务中，数据量特别大，得有几十万条记录。这样的话， 把dom4j的document转成xml 就会有问题了。 String根本放不下那么长的数据。

Document document = DocumentHelper.createDocument();
            Element rootElmt = document.addElement("公共档案","http://xxx/AccountingSoftwareDataInterfaceStandard/2010/PSGA/XMLSchema");
            rootElmt.addNamespace("行政事业单位", "http://xxx/AccountingSoftwareDataInterfaceStandard/2010/PSGA/XMLSchema");
            rootElmt.addNamespace("xsi", "http://xxx/2001/XMLSchema-instance");
            rootElmt.addAttribute("xsi:schemaLocation", "http://xxx/AccountingSoftwareDataInterfaceStandard/2010/PSGA/XMLSchema 公共档案.xsd");

                Element accttypeElement = rootElmt.addElement("电子账簿");
                accttypeElement.addElement("电子账簿编号").setText(accsystypecode);
                accttypeElement.addElement("电子账簿名称").setText(accsystypespec);
                accttypeElement.addElement("会计核算单位").setText(hsagencyMap.get("name")+"");
                accttypeElement.addElement("组织机构代码").setText(hsagencyMap.get("orgcode")+"");
xml = document.asXML();

。。。。
//封装自定义值报文结构
                for (int i = 0; i < CustomValues.size(); i++) {
                    。。。。
                    valueElement.addElement("档案值名称").setText(valueMap.get("name")+"");
                    valueElement.addElement("档案值描述").setText(valueMap.get("name")+"");
                   。。。。。
                    valueElement.addElement("档案值级次").setText(valueMap.get("levelno")+"");
                }
return xml;

解决：
把xml转成字字节流，然后再把字节流转成base64的格式。
然后再放到Stringbuffer里面。返回去。

            ByteArrayInputStream byteinput = new ByteArrayInputStream(document.asXML().getBytes());
            StringBuffer buffer = new StringBuffer();
            byte[] buff = new byte[1024 * 1024]; 
            int len = 0; 
            while (-1 != (len = byteinput.read(buff, 0, 1024))) 
            { 
                buffer.append(Base64.encode(buff, 0, len)); 
            } 
            try {
                byteinput.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } 
            xml = buffer.toString(); 
        }
        return xml;

客户端：解析byte，并生成文件

package gov.mof.fasp.ifmis.acal.common.service;

import java.io.File;
import java.io.FileOutputStream;
import java.net.URL;

import javax.xml.namespace.QName;
import javax.xml.rpc.ParameterMode;
import javax.xml.rpc.encoding.XMLType;

import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import org.codehaus.xfire.util.Base64;

public class ExpXmlTest {
    public static String axisToAsset() throws Exception {
        String serviceUrl = "http://localhost:7001//services/ExpXmlService";
        Service service = new Service(); 
        Call call = (Call) service.createCall();
        call.setTimeout(new Integer("10000")); //设置超时
        call.setTargetEndpointAddress(new URL(serviceUrl)); 
        String targetNamespace = "http://service.common.acal.ifmis.fasp.mof.gov"; 
        QName qName = new QName(targetNamespace, "expXml"); 
        call.setOperationName(qName);
        String message = null;
        try {
            String flag = "1";
            String acctsystypecode = "XZ_M";
            String hsagency = "2";
            String startterm = "10";
            String endterm = "10";
            String acctyear="2017";
            call.addParameter(new QName(targetNamespace, "flag"),XMLType.XSD_STRING,ParameterMode.IN);           
            call.addParameter(new QName(targetNamespace, "acctsystypecode"),XMLType.XSD_STRING,ParameterMode.IN);           
            call.addParameter(new QName(targetNamespace, "hsagency"),XMLType.XSD_STRING,ParameterMode.IN);           
            call.addParameter(new QName(targetNamespace, "startterm"),XMLType.XSD_STRING,ParameterMode.IN);           
            call.addParameter(new QName(targetNamespace, "endterm"),XMLType.XSD_STRING,ParameterMode.IN);           
            call.addParameter(new QName(targetNamespace, "acctyear"),XMLType.XSD_STRING,ParameterMode.IN);           
//            call.setReturnType(XMLType.XSD_STRING);
            Object[] obj = {flag,acctsystypecode, hsagency, startterm,endterm,acctyear};
            try {
                String ret = (String) call.invoke(obj);
                System.out.println("Get   result   :" + ret);
                String fileName = "java6webservice.xml";            
                File file = new File(fileName);         
                byte[] bytes = Base64.decode(ret); 
                System.out.println(bytes.length);   
                file.createNewFile();       
                FileOutputStream out = new FileOutputStream(file); 
                out.write(bytes); 
                out.flush(); 
                out.close();     
            } catch (Exception e) {
                e.printStackTrace();
            }  
        } catch (Exception e) {
           e.printStackTrace();
        }
        return message;
    }


    public static void main(String[] args) throws Exception {
        axisToAsset();
    }
}