我已经为SAP PI 7.5中的参数化Java映射编写了以下Java代码。参数由操作映射中指定的标签名称绑定（BS_NAME，CHANNEL_NAME，EMAIL）。
在使用有效负载测试OM的“测试”选项卡中的以下Java映射时，会出现以下错误： NullPointerException，同时尝试调用从本地变量“ this ”加载的对象的字段加载的空对象的com.sap.aii.mapping.api.TransformationInput.getInputParameters（）方法
我调试了代码，但没有发现问题。希望你们所有的专家团队都能对此有所启发。
请在下面找到XmlNFe_To_Mail类的Java代码。 BodyText类也用于获取某些内容。 XmlNFe_To_Mail类中遇到错误。
package nfeb2b.test;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
import org.xml.sax.SAXException;
import com.sap.aii.mapping.api.AbstractTrace;
import com.sap.aii.mapping.api.AbstractTransformation;
import com.sap.aii.mapping.api.StreamTransformationException;
import com.sap.aii.mapping.api.TransformationInput;
import com.sap.aii.mapping.api.TransformationOutput;
import com.sap.aii.mapping.lookup.Channel;
import com.sap.aii.mapping.lookup.LookupService;
import com.sap.aii.mapping.lookup.RfcAccessor;
import com.sap.aii.mapping.lookup.XmlPayload;
public class XmlNFe_To_Mail extends AbstractTransformation
{
private String prefixoSubject = new String();
private String emailFrom = new String();
private String prefixoDocumento = new String();
private String frase = new String();
private String gap = "\n\r";
private AbstractTrace trace = null;
private Map map = null;
private String BSSystem ="";
private String ComChannel = "";
private String Emails = "";
private final String NFE_EMPRESA = "NFE Company: ";
private final String NFe = "NFE";
private final String NFe_Mail = "nfe@company.com";
TransformationInput input = null;
TransformationOutput output = null;
public void execute(InputStream in, OutputStream out) throws StreamTransformationException
{
// TODO Auto-generated method stub
{
BSSystem = input.getInputParameters().getString("BS_NAME");
ComChannel = input.getInputParameters().getString("CHANNEL_NAME");
Emails= input.getInputParameters().getString("EMAIL");
try
{
configParamEmail();
BufferedReader inpxml = new BufferedReader(new InputStreamReader(in));
StringBuffer buffer = new StringBuffer();
String line = "";
String quebra = System.getProperty("line.separator");
while ((line = inpxml.readLine()) != null)
{
line.replaceAll("\r\n", "");
line.replaceAll(quebra, "");
line.replaceAll(" />", "/>");
line.replaceAll(" />", "/>");
line.replaceAll(" />", "/>");
buffer.append(line);
}
String inptxml = buffer.toString();
inptxml = inptxml.replace("\r\n", "");
inptxml = inptxml.replaceAll(quebra, "");
inptxml = inptxml.replaceAll(" />", "/>");
inptxml = inptxml.replaceAll(" />", "/>");
inptxml = inptxml.replaceAll(" />", "/>");
String idNFe = "";
String numeroNF = "";
String idEvent = "";
idNFe = inptxml.substring(inptxml.indexOf("<chNFe>") + 7, inptxml.indexOf("</chNFe>"));
numeroNF = idNFe.substring(25, 34);
if (inptxml.indexOf("infEvento") > 0) {
idEvent = inptxml.substring(inptxml.indexOf("<tpEvento>") + 10, inptxml.indexOf("</tpEvento>"));
if (idEvent.length() > 0) {
if (idEvent.equals("111111")) {
this.setPrefixoDocumento(this.getPrefixoDocumento().replaceAll("NFE", "CancNFe"));
this.setPrefixoSubject(this.getPrefixoSubject().replaceAll("NFE", "NFE CANCELADA"));
} else if (idEvent.equals("100000")) {
this.setPrefixoDocumento(this.getPrefixoDocumento().replaceAll("NFE", "CCE"));
this.setPrefixoSubject(this.getPrefixoSubject().replaceAll("NFE", "CCE"));
} else {
this.setPrefixoDocumento(this.getPrefixoDocumento().replaceAll("NFE", "ManDest"));
this.setPrefixoSubject(this.getPrefixoSubject().replaceAll("NFE", "MANIFESTO"));
}
}
}
Channel chn = null;
RfcAccessor rfc = null;
String email = "";
String pdf = "";
chn = LookupService.getChannel(getBSystem(),getCChannel());
rfc = LookupService.getRfcAccessor(chn);
String req = "<ns0:TEST_NFE_MAIL_OPT xmlns:ns0='urn:sap-com:document:sap:rfc:functions'><I_ACCESS_KEY>"
+ idNFe + "<I_ACCESS_KEY></ns0:ZOTC_NFE_EMAIL_OUTPUT>";
InputStream inputRFC = new ByteArrayInputStream(req.getBytes("UTF-8"));
XmlPayload rfcPayload = LookupService.getXmlPayload(inputRFC);
XmlPayload result = rfc.call(rfcPayload);
InputStream resp = result.getContent();
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(resp);
Node node = (Node) doc.getElementsByTagName("E_EMAIL").item(0);
if (node.hasChildNodes() && !node.getFirstChild().getNodeValue().equals(""))
{
email = node.getFirstChild().getNodeValue();
}
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transform = tf.newTransformer();
Document docout = db.newDocument();
Element root = docout.createElement("ns0:Mail");
root.setAttribute("xmlns:ns0", "http://sap.com/xi/XI/Mail/30");
docout.appendChild(root);
Element subject = docout.createElement("Subject");
root.appendChild(subject);
Text subjectText = docout.createTextNode(getPrefixoSubject() + numeroNF);
subject.appendChild(subjectText);
Element from = docout.createElement("From");
root.appendChild(from);
Text fromText = docout.createTextNode(getEmailFrom());
from.appendChild(fromText);
if (email.length() > 0)
{
email += ";";
} else {
email = this.getEmaillist();
}
Element to = docout.createElement("To");
root.appendChild(to);
Text toText = docout.createTextNode(email);
to.appendChild(toText);
Element contentType = docout.createElement("Content_Type");
root.appendChild(contentType);
Text contentTypeText = docout.createTextNode("multipart/mixed;boundary=--AaZz");
contentType.appendChild(contentTypeText);
BodyText texto = new BodyText(idNFe, getFrase(), inptxml, pdf);
Element content = docout.createElement("Content");
root.appendChild(content);
Text contentText = null;
if ("NFE Company: ".equalsIgnoreCase(getPrefixoSubject())) {
contentText = docout.createTextNode(texto.getnfeText());
}
else if ("NFE CANCELADA Company: ".equalsIgnoreCase(getPrefixoSubject())) {
contentText = docout.createTextNode(texto.getCnfeText());
}
else if ("CCE Company: ".equalsIgnoreCase(getPrefixoSubject())) {
contentText = docout.createTextNode(texto.getcceText());
}
content.appendChild(contentText);
DOMSource domS = new DOMSource(docout);
transform.transform((domS), new StreamResult(out));
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TransformerConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TransformerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (Exception e) {
// Exception Handling }
}
}
}
public String getGap() {
return gap;
}
public void setGap(String gap) {
this.gap = gap;
}
public String getFrase() {
return frase;
}
public void setFrase(String frase) {
this.frase = frase;
}
public String getBSystem(){
return BSSystem;
}
public String getEmaillist(){
return Emails;
}
public String getCChannel() {
return ComChannel;
}
public String getPrefixoSubject() {
return prefixoSubject;
}
public void setPrefixoSubject(String prefixoSubject) {
this.prefixoSubject = prefixoSubject;
}
public String getEmailFrom() {
return emailFrom;
}
public void setEmailFrom(String emailFrom) {
this.emailFrom = emailFrom;
}
public String getPrefixoDocumento() {
return prefixoDocumento;
}
public void setPrefixoDocumento(String prefixoDocumento) {
this.prefixoDocumento = prefixoDocumento;
}
private void configParamEmail() {
setEmailFrom(NFe_Mail);
setPrefixoDocumento(NFe);
setPrefixoSubject(NFE_EMPRESA);
}
@Override
public void transform(TransformationInput in, TransformationOutput out) throws StreamTransformationException {
this.execute(in.getInputPayload().getInputStream(), out.getOutputPayload().getOutputStream());
}
/*public void setParameter(Map arg0) {
// TODO Auto-generated method stub
}*/
}
请让我知道应该进行哪些更改。 谢谢。
答案 0 :(得分：0)
TransformationInput / TransformationOutput类中缺少实例，因为它们的变量为空，
TransformationInput input = null;
TransformationOutput output = null;
因此，您需要对它们进行实例化或将其作为参考传递给某些设置器。