java - 通过Web服务从服务器向客户端发送pdf文件

Question

由于我是 Web 服务的新手，您能告诉我问题的答案吗？我的问题是

I want to implement a web service which sends pdf files to client as the client calls this web service.

请有人用好的代码或解释帮助我。

现在有人可以解决我的错误吗。

12-23 09:42:48.429: DEBUG/installd(32): DexInv: --- BEGIN '/data/app/vmdl33143.tmp' --- 12-23 09:42:51.708: DEBUG/dalvikvm(328): DexOpt: 'Lorg/xmlpull/v1/XmlPullParser;' has an earlier definition; blocking out
12-23 09:42:51.730: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/io/KXmlParser;' has an earlier definition; blocking out
12-23 09:42:51.749: DEBUG/dalvikvm(328): DexOpt: 'Lorg/xmlpull/v1/XmlSerializer;' has an earlier definition; blocking out
12-23 09:42:51.759: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/io/KXmlSerializer;' has an earlier definition; blocking out
12-23 09:42:51.779: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/kdom/Node;' has an earlier definition; blocking out
12-23 09:42:51.779: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/kdom/Document;' has an earlier definition; blocking out
12-23 09:42:51.819: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/kdom/Element;' has an earlier definition; blocking out
12-23 09:42:51.830: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/wap/Wbxml;' has an earlier definition; blocking out
12-23 09:42:51.840: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/wap/WbxmlParser;' has an earlier definition; blocking out
12-23 09:42:51.900: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/wap/WbxmlSerializer;' has an earlier definition; blocking out
12-23 09:42:51.910: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/wap/syncml/SyncML;' has an earlier definition; blocking out
12-23 09:42:51.910: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/wap/wml/Wml;' has an earlier definition; blocking out
12-23 09:42:51.929: DEBUG/dalvikvm(328): DexOpt: 'Lorg/kxml2/wap/wv/WV;' has an earlier definition; blocking out
12-23 09:42:51.929: DEBUG/dalvikvm(328): DexOpt: 'Lorg/xmlpull/v1/XmlPullParserException;' has an earlier definition; blocking out
12-23 09:42:51.949: DEBUG/dalvikvm(328): DexOpt: 'Lorg/xmlpull/v1/XmlPullParserFactory;' has an earlier definition; blocking out
12-23 09:42:53.299: INFO/dalvikvm(328): DexOpt: not resolving ambiguous class 'Lorg/xmlpull/v1/XmlPullParser;'
12-23 09:42:53.319: INFO/dalvikvm(328): DexOpt: not resolving ambiguous class 'Lorg/xmlpull/v1/XmlPullParser;'
12-23 09:42:53.329: INFO/dalvikvm(328): DexOpt: not resolving ambiguous class 'Lorg/xmlpull/v1/XmlPullParser;'
12-23 09:42:53.350: INFO/dalvikvm(328): DexOpt: not resolving ambiguous class 'Lorg/xmlpull/v1/XmlPullParser;'
12-23 09:42:53.350: INFO/dalvikvm(328): DexOpt: not resolving ambiguous class 'Lorg/xmlpull/v1/XmlPullParser;'
12-23 09:42:53.370: INFO/dalvikvm(328): DexOpt: not resolving ambiguous class 'Lorg/xmlpull/v1/XmlPullParser;'
12-23 09:42:53.499: INFO/dalvikvm(328): DexOpt: not resolving ambiguous class 'Lorg/xmlpull/v1/XmlPullParser;'
12-23 09:42:53.560: INFO/dalvikvm(328): DexOpt: not resolving ambiguous class 'Lorg/xmlpull/v1/XmlPullParser;'
12-23 09:42:53.570: INFO/dalvikvm(328): DexOpt: not resolving ambiguous class 'Lorg/kxml2/io/KXmlSerializer;'
12-23 09:42:53.659: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/xmlpull/v1/XmlPullParser;': multiple definitions
12-23 09:42:53.668: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/io/KXmlParser;': multiple definitions
12-23 09:42:53.668: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/xmlpull/v1/XmlSerializer;': multiple definitions
12-23 09:42:53.668: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/io/KXmlSerializer;': multiple definitions
12-23 09:42:53.680: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/kdom/Node;': multiple definitions
12-23 09:42:53.690: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/kdom/Document;': multiple definitions
12-23 09:42:53.709: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/kdom/Element;': multiple definitions
12-23 09:42:53.709: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/wap/Wbxml;': multiple definitions
12-23 09:42:53.719: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/wap/WbxmlParser;': multiple definitions
12-23 09:42:53.719: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/wap/WbxmlSerializer;': multiple definitions
12-23 09:42:53.719: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/wap/syncml/SyncML;': multiple definitions
12-23 09:42:53.719: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/wap/wml/Wml;': multiple definitions
12-23 09:42:53.719: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/kxml2/wap/wv/WV;': multiple definitions
12-23 09:42:53.719: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/xmlpull/v1/XmlPullParserException;': multiple definitions
12-23 09:42:53.719: DEBUG/dalvikvm(328): DexOpt: not verifying 'Lorg/xmlpull/v1/XmlPullParserFactory;': multiple definitions
12-23 09:42:53.829: DEBUG/dalvikvm(328): DexOpt: load 867ms, verify 1752ms, opt 108ms
12-23 09:42:54.029: DEBUG/installd(32): DexInv: --- END '/data/app/vmdl33143.tmp'(success) ---

这是android模拟器DDMS的错误。

现在我的网络服务和代码如下所示。

代码:-

package com.uks.webservice;

import java.io.FileNotFoundException;  
import java.io.IOException;  
import java.rmi.Remote;  

public interface SendPDF extends Remote {

    public String[] sendPDF() throws FileNotFoundException, IOException,
            Exception;
}

Web 服务的主类已创建:-

package com.uks.webservice;

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

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

import sun.misc.BASE64Encoder;  

public class SendPDFImpl implements SendPDF {

@Override
public String[] sendPDF() {

    String[] pdfFile = new String[2];
    BASE64Encoder encoder = new BASE64Encoder();
    File file = new File(
            "C:/eclipse/workspace/AIPWebService/src/test.pdf");
    DataHandler dh = new DataHandler(new FileDataSource(file));
    String readLine = null;
    byte[] data = new byte[(int) file.length()];
    int offset = 0;
    int numRead = 0;
    InputStream stream = null;
    try {
        System.out.println("Web Service Called Successfully");
        stream = dh.getInputStream();
        // BufferedReader bufferedReader = new BufferedReader(
        // new InputStreamReader(stream));
        while (offset < data.length
                && (numRead = stream.read(data, offset, data.length
                        - offset)) >= 0) {
            offset += numRead;
        }
        readLine = encoder.encode(data);
        // while ((readLine = bufferedReader.readLine()) != null) {
        System.out.println("'Reading File............................");
        System.out.println("\n");
        System.out.println("Data Reading Successful");

        pdfFile[0] = file.getName();
        pdfFile[1] = readLine;

        stream.close();

    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return pdfFile;
}
}

网络服务:-

<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions targetNamespace="http://webservice.uks.com"
    xmlns:apachesoap="http://xml.apache.org/xml-soap" xmlns:impl="http://webservice.uks.com"
    xmlns:intf="http://webservice.uks.com" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
    xmlns:wsdlsoap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <!--
        WSDL created by Apache Axis version: 1.4 Built on Apr 22, 2006
        (06:55:48 PDT)
    -->
    <wsdl:types>
        <schema elementFormDefault="qualified" targetNamespace="http://webservice.uks.com"
            xmlns="http://www.w3.org/2001/XMLSchema">
            <element name="sendPDF">
                <complexType />
            </element>
            <element name="sendPDFResponse">
                <complexType>
                    <sequence>
                        <element maxOccurs="unbounded" name="sendPDFReturn" type="xsd:String" />
                    </sequence>
                </complexType>
            </element>
        </schema>
    </wsdl:types>

    <wsdl:message name="sendPDFRequest">

        <wsdl:part element="impl:sendPDF" name="parameters" />

    </wsdl:message>

    <wsdl:message name="sendPDFResponse">

        <wsdl:part element="impl:sendPDFResponse" name="parameters" />

    </wsdl:message>

    <wsdl:portType name="SendPDFImpl">

        <wsdl:operation name="sendPDF">

            <wsdl:input message="impl:sendPDFRequest" name="sendPDFRequest" />

            <wsdl:output message="impl:sendPDFResponse" name="sendPDFResponse" />

        </wsdl:operation>

    </wsdl:portType>

    <wsdl:binding name="SendPDFImplSoapBinding" type="impl:SendPDFImpl">

        <wsdlsoap:binding style="document"
            transport="http://schemas.xmlsoap.org/soap/http" />

        <wsdl:operation name="sendPDF">

            <wsdlsoap:operation soapAction="" />

            <wsdl:input name="sendPDFRequest">

                <wsdlsoap:body use="literal" />

            </wsdl:input>

            <wsdl:output name="sendPDFResponse">

                <wsdlsoap:body use="literal" />

            </wsdl:output>

        </wsdl:operation>

    </wsdl:binding>

    <wsdl:service name="SendPDFImplService">

        <wsdl:port binding="impl:SendPDFImplSoapBinding" name="SendPDFImpl">

            <wsdlsoap:address
                location="http://localhost:8080/AIPWebService/services/SendPDFImpl" />

        </wsdl:port>

    </wsdl:service>

</wsdl:definitions>

现在是我的 Android 代码。

package com.uks.android.webservice;

import android.app.Activity;  
import android.os.Bundle;  
import android.widget.TextView;  

import org.ksoap2.SoapEnvelope;  
import org.ksoap2.serialization.SoapObject;  
import org.ksoap2.serialization.SoapSerializationEnvelope;  
import org.ksoap2.transport.AndroidHttpTransport;  

public class PDFActivity extends Activity {  
    private final String METHOD_NAME = "sendPDF";  
    private final String NAMESPACE = "http://webservice.uks.com/";  
    private final String SOAP_ACTION = NAMESPACE + METHOD_NAME;  
    private final String URL = "http://192.168.1.123:8080/AIPWebService/services/SendPDFImpl";  

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        TextView textViewOne = (TextView) findViewById(R.id.textViewOne);
        TextView textViewTwo = (TextView) findViewById(R.id.textViewTwo);
        try {
            SoapObject soapObject = new SoapObject(NAMESPACE, METHOD_NAME);

            SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                    SoapEnvelope.VER11);
            envelope.setOutputSoapObject(soapObject);

            textViewOne.setText("Web Service Started");
            AndroidHttpTransport httpTransport = new AndroidHttpTransport(URL);

            httpTransport.call(SOAP_ACTION, envelope);

            SoapObject result = (SoapObject) envelope.getResponse();
            textViewTwo.setText(result.toString());
            // Object result = envelope.getResponse();
            // FileOutputStream outputStream = openFileOutput(name, mode)

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

请帮帮我。

提前致谢。

Answer 1

您需要将文件转换为字节数组并将其传递给服务器上的服务，执行相反的操作以取回文件。

• Here is very good article on doing this using JAXWS