在软件 ag webmethods 中使用第三方库导致 InvocationTargetException
Using third party library in software ag webmethods results in InvocationTargetException
我在 webmethods 中使用 This Library 来读取大型 .xlsm 文件，它是 Apache POI 库的包装器。我无法使用默认的 POI API，因为该文件包含超过 100 万行，而且它太大而无法一次加载。
所以这里的问题是，当我在 eclipse（而不是 webmethods）中的测试项目中导入库时，它可以完美地工作，没有任何问题，但是当我将它与所有必需的 jar 文件一起导入 webmethods 时，我 运行，它会抛出一个 "InvocationTargetException"。
这是用于从该库解析的 class：
package com.monitorjbl.xlsx;
import com.monitorjbl.xlsx.exceptions.CloseException;
import com.monitorjbl.xlsx.exceptions.MissingSheetException;
import com.monitorjbl.xlsx.exceptions.OpenException;
import com.monitorjbl.xlsx.exceptions.ReadException;
import com.monitorjbl.xlsx.impl.StreamingCell;
import com.monitorjbl.xlsx.impl.StreamingRow;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.exceptions.OpenXML4JException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.poifs.crypt.Decryptor;
import org.apache.poi.poifs.crypt.EncryptionInfo;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.BuiltinFormats;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.eventusermodel.XSSFReader;
import org.apache.poi.xssf.model.SharedStringsTable;
import org.apache.poi.xssf.model.StylesTable;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.Characters;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.security.GeneralSecurityException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Objects;
import static com.monitorjbl.xlsx.XmlUtils.document;
import static com.monitorjbl.xlsx.XmlUtils.searchForNodeList;
/**
* Streaming Excel workbook implementation. Most advanced features of POI are not supported.
* Use this only if your application can handle iterating through an entire workbook, row by
* row.
*/
public class StreamingReader implements Iterable<Row>, AutoCloseable {
private static final Logger log = LoggerFactory.getLogger(StreamingReader.class);
private final SharedStringsTable sst;
private final StylesTable stylesTable;
private final XMLEventReader parser;
private final DataFormatter dataFormatter = new DataFormatter();
private int rowCacheSize;
private List<Row> rowCache = new ArrayList<>();
private Iterator<Row> rowCacheIterator;
private String lastContents;
private StreamingRow currentRow;
private StreamingCell currentCell;
private File tmp;
private StreamingReader(SharedStringsTable sst, StylesTable stylesTable, XMLEventReader parser, int rowCacheSize) {
this.sst = sst;
this.stylesTable = stylesTable;
this.parser = parser;
this.rowCacheSize = rowCacheSize;
}
/**
* Read through a number of rows equal to the rowCacheSize field or until there is no more data to read
*
* @return true if data was read
*/
private boolean getRow() {
try {
rowCache.clear();
while(rowCache.size() < rowCacheSize && parser.hasNext()) {
handleEvent(parser.nextEvent());
}
rowCacheIterator = rowCache.iterator();
return rowCacheIterator.hasNext();
} catch(XMLStreamException | SAXException e) {
log.debug("End of stream");
}
return false;
}
/**
* Handles a SAX event.
*
* @param event
* @throws SAXException
*/
private void handleEvent(XMLEvent event) throws SAXException {
if(event.getEventType() == XMLStreamConstants.CHARACTERS) {
Characters c = event.asCharacters();
lastContents += c.getData();
} else if(event.getEventType() == XMLStreamConstants.START_ELEMENT) {
StartElement startElement = event.asStartElement();
String tagLocalName = startElement.getName().getLocalPart();
if("row".equals(tagLocalName)) {
Attribute rowIndex = startElement.getAttributeByName(new QName("r"));
currentRow = new StreamingRow(Integer.parseInt(rowIndex.getValue()) - 1);
} else if("c".equals(tagLocalName)) {
Attribute ref = startElement.getAttributeByName(new QName("r"));
String[] coord = ref.getValue().split("(?<=\D)(?=\d)|(?<=\d)(?=\D)");
currentCell = new StreamingCell(CellReference.convertColStringToIndex(coord[0]), Integer.parseInt(coord[1]) - 1);
setFormatString(startElement, currentCell);
Attribute type = startElement.getAttributeByName(new QName("t"));
if(type != null) {
currentCell.setType(type.getValue());
} else {
currentCell.setType("n");
}
Attribute style = startElement.getAttributeByName(new QName("s"));
if(style != null){
String indexStr = style.getValue();
try{
int index = Integer.parseInt(indexStr);
currentCell.setCellStyle(stylesTable.getStyleAt(index));
} catch(NumberFormatException nfe) {
log.warn("Ignoring invalid style index {}", indexStr);
}
}
}
// Clear contents cache
lastContents = "";
} else if(event.getEventType() == XMLStreamConstants.END_ELEMENT) {
EndElement endElement = event.asEndElement();
String tagLocalName = endElement.getName().getLocalPart();
if("v".equals(tagLocalName)) {
currentCell.setRawContents(unformattedContents());
currentCell.setContents(formattedContents());
} else if("row".equals(tagLocalName) && currentRow != null) {
rowCache.add(currentRow);
} else if("c".equals(tagLocalName)) {
currentRow.getCellMap().put(currentCell.getColumnIndex(), currentCell);
}
}
}
/**
* Read the numeric format string out of the styles table for this cell. Stores
* the result in the Cell.
*
* @param startElement
* @param cell
*/
void setFormatString(StartElement startElement, StreamingCell cell) {
Attribute cellStyle = startElement.getAttributeByName(new QName("s"));
String cellStyleString = (cellStyle != null) ? cellStyle.getValue() : null;
XSSFCellStyle style = null;
if(cellStyleString != null) {
style = stylesTable.getStyleAt(Integer.parseInt(cellStyleString));
} else if(stylesTable.getNumCellStyles() > 0) {
style = stylesTable.getStyleAt(0);
}
if(style != null) {
cell.setNumericFormatIndex(style.getDataFormat());
String formatString = style.getDataFormatString();
if(formatString != null) {
cell.setNumericFormat(formatString);
} else {
cell.setNumericFormat(BuiltinFormats.getBuiltinFormat(cell.getNumericFormatIndex()));
}
} else {
cell.setNumericFormatIndex(null);
cell.setNumericFormat(null);
}
}
/**
* Tries to format the contents of the last contents appropriately based on
* the type of cell and the discovered numeric format.
*
* @return
*/
String formattedContents() {
switch(currentCell.getType()) {
case "s": //string stored in shared table
int idx = Integer.parseInt(lastContents);
return new XSSFRichTextString(sst.getEntryAt(idx)).toString();
case "inlineStr": //inline string (not in sst)
return new XSSFRichTextString(lastContents).toString();
case "str": //forumla type
return '"' + lastContents + '"';
case "e": //error type
return "ERROR: " + lastContents;
case "n": //numeric type
if(currentCell.getNumericFormat() != null && lastContents.length() > 0) {
return dataFormatter.formatRawCellContents(
Double.parseDouble(lastContents),
currentCell.getNumericFormatIndex(),
currentCell.getNumericFormat());
} else {
return lastContents;
}
default:
return lastContents;
}
}
/**
* Returns the contents of the cell, with no formatting applied
*
* @return
*/
String unformattedContents() {
switch(currentCell.getType()) {
case "s": //string stored in shared table
int idx = Integer.parseInt(lastContents);
return new XSSFRichTextString(sst.getEntryAt(idx)).toString();
case "inlineStr": //inline string (not in sst)
return new XSSFRichTextString(lastContents).toString();
default:
return lastContents;
}
}
/**
* Returns a new streaming iterator to loop through rows. This iterator is not
* guaranteed to have all rows in memory, and any particular iteration may
* trigger a load from disk to read in new data.
*
* @return the streaming iterator
*/
@Override
public Iterator<Row> iterator() {
return new StreamingIterator();
}
/**
* Closes the streaming resource, attempting to clean up any temporary files created.
*
* @throws com.monitorjbl.xlsx.exceptions.CloseException if there is an issue closing the stream
*/
@Override
public void close() {
try {
parser.close();
} catch(XMLStreamException e) {
throw new CloseException(e);
}
if(tmp != null) {
log.debug("Deleting tmp file [" + tmp.getAbsolutePath() + "]");
tmp.delete();
}
}
static File writeInputStreamToFile(InputStream is, int bufferSize) throws IOException {
File f = Files.createTempFile("tmp-", ".xlsx").toFile();
try(FileOutputStream fos = new FileOutputStream(f)) {
int read;
byte[] bytes = new byte[bufferSize];
while((read = is.read(bytes)) != -1) {
fos.write(bytes, 0, read);
}
is.close();
fos.close();
return f;
}
}
public static Builder builder() {
return new Builder();
}
public static class Builder {
int rowCacheSize = 10;
int bufferSize = 1024;
int sheetIndex = 0;
String sheetName;
String password;
/**
* The number of rows to keep in memory at any given point.
* <p>
* Defaults to 10
* </p>
*
* @param rowCacheSize number of rows
* @return reference to current {@code Builder}
*/
public Builder rowCacheSize(int rowCacheSize) {
this.rowCacheSize = rowCacheSize;
return this;
}
/**
* The number of bytes to read into memory from the input
* resource.
* <p>
* Defaults to 1024
* </p>
*
* @param bufferSize buffer size in bytes
* @return reference to current {@code Builder}
*/
public Builder bufferSize(int bufferSize) {
this.bufferSize = bufferSize;
return this;
}
/**
* Which sheet to open. There can only be one sheet open
* for a single instance of {@code StreamingReader}. If
* more sheets need to be read, a new instance must be
* created.
* <p>
* Defaults to 0
* </p>
*
* @param sheetIndex index of sheet
* @return reference to current {@code Builder}
*/
public Builder sheetIndex(int sheetIndex) {
this.sheetIndex = sheetIndex;
return this;
}
/**
* Which sheet to open. There can only be one sheet open
* for a single instance of {@code StreamingReader}. If
* more sheets need to be read, a new instance must be
* created.
*
* @param sheetName name of sheet
* @return reference to current {@code Builder}
*/
public Builder sheetName(String sheetName) {
this.sheetName = sheetName;
return this;
}
/**
* For password protected files specify password to open file.
* If the password is incorrect a {@code ReadException} is thrown on
* {@code read}.
* <p>NULL indicates that no password should be used, this is the
* default value.</p>
*
* @param password to use when opening file
* @return reference to current {@code Builder}
*/
public Builder password(String password) {
this.password = password;
return this;
}
/**
* Reads a given {@code InputStream} and returns a new
* instance of {@code StreamingReader}. Due to Apache POI
* limitations, a temporary file must be written in order
* to create a streaming iterator. This process will use
* the same buffer size as specified in {@link #bufferSize(int)}.
*
* @param is input stream to read in
* @return built streaming reader instance
* @throws com.monitorjbl.xlsx.exceptions.ReadException if there is an issue reading the stream
*/
public StreamingReader read(InputStream is) {
File f = null;
try {
f = writeInputStreamToFile(is, bufferSize);
log.debug("Created temp file [" + f.getAbsolutePath() + "]");
StreamingReader r = read(f);
r.tmp = f;
return r;
} catch(IOException e) {
throw new ReadException("Unable to read input stream", e);
} catch(RuntimeException e) {
f.delete();
throw e;
}
}
/**
* Reads a given {@code File} and returns a new instance
* of {@code StreamingReader}.
*
* @param f file to read in
* @return built streaming reader instance
* @throws com.monitorjbl.xlsx.exceptions.OpenException if there is an issue opening the file
* @throws com.monitorjbl.xlsx.exceptions.ReadException if there is an issue reading the file
*/
public StreamingReader read(File f) {
try {
OPCPackage pkg;
if(password != null) {
// Based on: https://poi.apache.org/encryption.html
POIFSFileSystem poifs = new POIFSFileSystem(f);
EncryptionInfo info = new EncryptionInfo(poifs);
Decryptor d = Decryptor.getInstance(info);
d.verifyPassword(password);
pkg = OPCPackage.open(d.getDataStream(poifs));
} else {
pkg = OPCPackage.open(f);
}
XSSFReader reader = new XSSFReader(pkg);
SharedStringsTable sst = reader.getSharedStringsTable();
StylesTable styles = reader.getStylesTable();
InputStream sheet = findSheet(reader);
if(sheet == null) {
throw new MissingSheetException("Unable to find sheet at index [" + sheetIndex + "]");
}
XMLEventReader parser = XMLInputFactory.newInstance().createXMLEventReader(sheet);
return new StreamingReader(sst, styles, parser, rowCacheSize);
} catch(IOException e) {
throw new OpenException("Failed to open file", e);
} catch(OpenXML4JException | XMLStreamException e) {
throw new ReadException("Unable to read workbook", e);
} catch(GeneralSecurityException e) {
throw new ReadException("Unable to read workbook - Decryption failed", e);
}
}
InputStream findSheet(XSSFReader reader) throws IOException, InvalidFormatException {
int index = sheetIndex;
if(sheetName != null) {
index = -1;
//This file is separate from the worksheet data, and should be fairly small
NodeList nl = searchForNodeList(document(reader.getWorkbookData()), "/workbook/sheets/sheet");
for(int i = 0; i < nl.getLength(); i++) {
if(Objects.equals(nl.item(i).getAttributes().getNamedItem("name").getTextContent(), sheetName)) {
index = i;
}
}
if(index < 0) {
return null;
}
}
Iterator<InputStream> iter = reader.getSheetsData();
InputStream sheet = null;
int i = 0;
while(iter.hasNext()) {
InputStream is = iter.next();
if(i++ == index) {
sheet = is;
log.debug("Found sheet at index [" + sheetIndex + "]");
break;
}
}
return sheet;
}
}
class StreamingIterator implements Iterator<Row> {
public StreamingIterator() {
if(rowCacheIterator == null) {
hasNext();
}
}
@Override
public boolean hasNext() {
return (rowCacheIterator != null && rowCacheIterator.hasNext()) || getRow();
}
@Override
public Row next() {
return rowCacheIterator.next();
}
@Override
public void remove() {
throw new RuntimeException("NotSupported");
}
}
}
这里是我在 java 服务中使用的代码：（这基本上是图书馆在其页面中作为文档提供的内容）
File is = new File("E:\bpc\testdata01.xlsm"));
StreamingReader reader = StreamingReader.builder()
.rowCacheSize(100)
.bufferSize(4096)
.sheetName("SOURCE_1")
.read(is);
所以当 StreamingReader 调用 read(is) 函数时，我抛出以下异常：
java.lang.reflect.InvocationTargetException:Could not initialize class org.apache.poi.POIXMLTypeLoader
我真的很确定为什么会这样...是因为源代码中的构建器 class 是静态的并且它是从我的静态 java 服务调用的吗？
注意：请注意，我运行正在使用这个软件 AG webmethods，它有自己的方式来实现 java 服务，所以我唯一可以放置代码的地方是这样的：（你不能调试 java 服务）
public final class importInputFile_SVC
{
public static final void importInputFile(IData pipeline)
throws ServiceException {
//code goes here
}
}
非常感谢任何帮助。
信息不足，无法真正分析您的问题。但是请尝试将所有库放在包的 code/jars 目录中，并在 manifest.v3 文件中启用包类加载器。这将确保您的 java 服务仅使用您的特定库，而不使用其他版本的 jar，这可能是您 wM 安装的一部分。
编辑：通过添加以下行在 manifest.v3 文件中启用包类加载器：
<value name='classloader'>package</value>
我在 webmethods 中使用 This Library 来读取大型 .xlsm 文件，它是 Apache POI 库的包装器。我无法使用默认的 POI API，因为该文件包含超过 100 万行，而且它太大而无法一次加载。
所以这里的问题是，当我在 eclipse（而不是 webmethods）中的测试项目中导入库时，它可以完美地工作，没有任何问题，但是当我将它与所有必需的 jar 文件一起导入 webmethods 时，我 运行，它会抛出一个 "InvocationTargetException"。
这是用于从该库解析的 class：
package com.monitorjbl.xlsx;
import com.monitorjbl.xlsx.exceptions.CloseException;
import com.monitorjbl.xlsx.exceptions.MissingSheetException;
import com.monitorjbl.xlsx.exceptions.OpenException;
import com.monitorjbl.xlsx.exceptions.ReadException;
import com.monitorjbl.xlsx.impl.StreamingCell;
import com.monitorjbl.xlsx.impl.StreamingRow;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.exceptions.OpenXML4JException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.poifs.crypt.Decryptor;
import org.apache.poi.poifs.crypt.EncryptionInfo;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.BuiltinFormats;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.eventusermodel.XSSFReader;
import org.apache.poi.xssf.model.SharedStringsTable;
import org.apache.poi.xssf.model.StylesTable;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.Attribute;
import javax.xml.stream.events.Characters;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.security.GeneralSecurityException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Objects;
import static com.monitorjbl.xlsx.XmlUtils.document;
import static com.monitorjbl.xlsx.XmlUtils.searchForNodeList;
/**
* Streaming Excel workbook implementation. Most advanced features of POI are not supported.
* Use this only if your application can handle iterating through an entire workbook, row by
* row.
*/
public class StreamingReader implements Iterable<Row>, AutoCloseable {
private static final Logger log = LoggerFactory.getLogger(StreamingReader.class);
private final SharedStringsTable sst;
private final StylesTable stylesTable;
private final XMLEventReader parser;
private final DataFormatter dataFormatter = new DataFormatter();
private int rowCacheSize;
private List<Row> rowCache = new ArrayList<>();
private Iterator<Row> rowCacheIterator;
private String lastContents;
private StreamingRow currentRow;
private StreamingCell currentCell;
private File tmp;
private StreamingReader(SharedStringsTable sst, StylesTable stylesTable, XMLEventReader parser, int rowCacheSize) {
this.sst = sst;
this.stylesTable = stylesTable;
this.parser = parser;
this.rowCacheSize = rowCacheSize;
}
/**
* Read through a number of rows equal to the rowCacheSize field or until there is no more data to read
*
* @return true if data was read
*/
private boolean getRow() {
try {
rowCache.clear();
while(rowCache.size() < rowCacheSize && parser.hasNext()) {
handleEvent(parser.nextEvent());
}
rowCacheIterator = rowCache.iterator();
return rowCacheIterator.hasNext();
} catch(XMLStreamException | SAXException e) {
log.debug("End of stream");
}
return false;
}
/**
* Handles a SAX event.
*
* @param event
* @throws SAXException
*/
private void handleEvent(XMLEvent event) throws SAXException {
if(event.getEventType() == XMLStreamConstants.CHARACTERS) {
Characters c = event.asCharacters();
lastContents += c.getData();
} else if(event.getEventType() == XMLStreamConstants.START_ELEMENT) {
StartElement startElement = event.asStartElement();
String tagLocalName = startElement.getName().getLocalPart();
if("row".equals(tagLocalName)) {
Attribute rowIndex = startElement.getAttributeByName(new QName("r"));
currentRow = new StreamingRow(Integer.parseInt(rowIndex.getValue()) - 1);
} else if("c".equals(tagLocalName)) {
Attribute ref = startElement.getAttributeByName(new QName("r"));
String[] coord = ref.getValue().split("(?<=\D)(?=\d)|(?<=\d)(?=\D)");
currentCell = new StreamingCell(CellReference.convertColStringToIndex(coord[0]), Integer.parseInt(coord[1]) - 1);
setFormatString(startElement, currentCell);
Attribute type = startElement.getAttributeByName(new QName("t"));
if(type != null) {
currentCell.setType(type.getValue());
} else {
currentCell.setType("n");
}
Attribute style = startElement.getAttributeByName(new QName("s"));
if(style != null){
String indexStr = style.getValue();
try{
int index = Integer.parseInt(indexStr);
currentCell.setCellStyle(stylesTable.getStyleAt(index));
} catch(NumberFormatException nfe) {
log.warn("Ignoring invalid style index {}", indexStr);
}
}
}
// Clear contents cache
lastContents = "";
} else if(event.getEventType() == XMLStreamConstants.END_ELEMENT) {
EndElement endElement = event.asEndElement();
String tagLocalName = endElement.getName().getLocalPart();
if("v".equals(tagLocalName)) {
currentCell.setRawContents(unformattedContents());
currentCell.setContents(formattedContents());
} else if("row".equals(tagLocalName) && currentRow != null) {
rowCache.add(currentRow);
} else if("c".equals(tagLocalName)) {
currentRow.getCellMap().put(currentCell.getColumnIndex(), currentCell);
}
}
}
/**
* Read the numeric format string out of the styles table for this cell. Stores
* the result in the Cell.
*
* @param startElement
* @param cell
*/
void setFormatString(StartElement startElement, StreamingCell cell) {
Attribute cellStyle = startElement.getAttributeByName(new QName("s"));
String cellStyleString = (cellStyle != null) ? cellStyle.getValue() : null;
XSSFCellStyle style = null;
if(cellStyleString != null) {
style = stylesTable.getStyleAt(Integer.parseInt(cellStyleString));
} else if(stylesTable.getNumCellStyles() > 0) {
style = stylesTable.getStyleAt(0);
}
if(style != null) {
cell.setNumericFormatIndex(style.getDataFormat());
String formatString = style.getDataFormatString();
if(formatString != null) {
cell.setNumericFormat(formatString);
} else {
cell.setNumericFormat(BuiltinFormats.getBuiltinFormat(cell.getNumericFormatIndex()));
}
} else {
cell.setNumericFormatIndex(null);
cell.setNumericFormat(null);
}
}
/**
* Tries to format the contents of the last contents appropriately based on
* the type of cell and the discovered numeric format.
*
* @return
*/
String formattedContents() {
switch(currentCell.getType()) {
case "s": //string stored in shared table
int idx = Integer.parseInt(lastContents);
return new XSSFRichTextString(sst.getEntryAt(idx)).toString();
case "inlineStr": //inline string (not in sst)
return new XSSFRichTextString(lastContents).toString();
case "str": //forumla type
return '"' + lastContents + '"';
case "e": //error type
return "ERROR: " + lastContents;
case "n": //numeric type
if(currentCell.getNumericFormat() != null && lastContents.length() > 0) {
return dataFormatter.formatRawCellContents(
Double.parseDouble(lastContents),
currentCell.getNumericFormatIndex(),
currentCell.getNumericFormat());
} else {
return lastContents;
}
default:
return lastContents;
}
}
/**
* Returns the contents of the cell, with no formatting applied
*
* @return
*/
String unformattedContents() {
switch(currentCell.getType()) {
case "s": //string stored in shared table
int idx = Integer.parseInt(lastContents);
return new XSSFRichTextString(sst.getEntryAt(idx)).toString();
case "inlineStr": //inline string (not in sst)
return new XSSFRichTextString(lastContents).toString();
default:
return lastContents;
}
}
/**
* Returns a new streaming iterator to loop through rows. This iterator is not
* guaranteed to have all rows in memory, and any particular iteration may
* trigger a load from disk to read in new data.
*
* @return the streaming iterator
*/
@Override
public Iterator<Row> iterator() {
return new StreamingIterator();
}
/**
* Closes the streaming resource, attempting to clean up any temporary files created.
*
* @throws com.monitorjbl.xlsx.exceptions.CloseException if there is an issue closing the stream
*/
@Override
public void close() {
try {
parser.close();
} catch(XMLStreamException e) {
throw new CloseException(e);
}
if(tmp != null) {
log.debug("Deleting tmp file [" + tmp.getAbsolutePath() + "]");
tmp.delete();
}
}
static File writeInputStreamToFile(InputStream is, int bufferSize) throws IOException {
File f = Files.createTempFile("tmp-", ".xlsx").toFile();
try(FileOutputStream fos = new FileOutputStream(f)) {
int read;
byte[] bytes = new byte[bufferSize];
while((read = is.read(bytes)) != -1) {
fos.write(bytes, 0, read);
}
is.close();
fos.close();
return f;
}
}
public static Builder builder() {
return new Builder();
}
public static class Builder {
int rowCacheSize = 10;
int bufferSize = 1024;
int sheetIndex = 0;
String sheetName;
String password;
/**
* The number of rows to keep in memory at any given point.
* <p>
* Defaults to 10
* </p>
*
* @param rowCacheSize number of rows
* @return reference to current {@code Builder}
*/
public Builder rowCacheSize(int rowCacheSize) {
this.rowCacheSize = rowCacheSize;
return this;
}
/**
* The number of bytes to read into memory from the input
* resource.
* <p>
* Defaults to 1024
* </p>
*
* @param bufferSize buffer size in bytes
* @return reference to current {@code Builder}
*/
public Builder bufferSize(int bufferSize) {
this.bufferSize = bufferSize;
return this;
}
/**
* Which sheet to open. There can only be one sheet open
* for a single instance of {@code StreamingReader}. If
* more sheets need to be read, a new instance must be
* created.
* <p>
* Defaults to 0
* </p>
*
* @param sheetIndex index of sheet
* @return reference to current {@code Builder}
*/
public Builder sheetIndex(int sheetIndex) {
this.sheetIndex = sheetIndex;
return this;
}
/**
* Which sheet to open. There can only be one sheet open
* for a single instance of {@code StreamingReader}. If
* more sheets need to be read, a new instance must be
* created.
*
* @param sheetName name of sheet
* @return reference to current {@code Builder}
*/
public Builder sheetName(String sheetName) {
this.sheetName = sheetName;
return this;
}
/**
* For password protected files specify password to open file.
* If the password is incorrect a {@code ReadException} is thrown on
* {@code read}.
* <p>NULL indicates that no password should be used, this is the
* default value.</p>
*
* @param password to use when opening file
* @return reference to current {@code Builder}
*/
public Builder password(String password) {
this.password = password;
return this;
}
/**
* Reads a given {@code InputStream} and returns a new
* instance of {@code StreamingReader}. Due to Apache POI
* limitations, a temporary file must be written in order
* to create a streaming iterator. This process will use
* the same buffer size as specified in {@link #bufferSize(int)}.
*
* @param is input stream to read in
* @return built streaming reader instance
* @throws com.monitorjbl.xlsx.exceptions.ReadException if there is an issue reading the stream
*/
public StreamingReader read(InputStream is) {
File f = null;
try {
f = writeInputStreamToFile(is, bufferSize);
log.debug("Created temp file [" + f.getAbsolutePath() + "]");
StreamingReader r = read(f);
r.tmp = f;
return r;
} catch(IOException e) {
throw new ReadException("Unable to read input stream", e);
} catch(RuntimeException e) {
f.delete();
throw e;
}
}
/**
* Reads a given {@code File} and returns a new instance
* of {@code StreamingReader}.
*
* @param f file to read in
* @return built streaming reader instance
* @throws com.monitorjbl.xlsx.exceptions.OpenException if there is an issue opening the file
* @throws com.monitorjbl.xlsx.exceptions.ReadException if there is an issue reading the file
*/
public StreamingReader read(File f) {
try {
OPCPackage pkg;
if(password != null) {
// Based on: https://poi.apache.org/encryption.html
POIFSFileSystem poifs = new POIFSFileSystem(f);
EncryptionInfo info = new EncryptionInfo(poifs);
Decryptor d = Decryptor.getInstance(info);
d.verifyPassword(password);
pkg = OPCPackage.open(d.getDataStream(poifs));
} else {
pkg = OPCPackage.open(f);
}
XSSFReader reader = new XSSFReader(pkg);
SharedStringsTable sst = reader.getSharedStringsTable();
StylesTable styles = reader.getStylesTable();
InputStream sheet = findSheet(reader);
if(sheet == null) {
throw new MissingSheetException("Unable to find sheet at index [" + sheetIndex + "]");
}
XMLEventReader parser = XMLInputFactory.newInstance().createXMLEventReader(sheet);
return new StreamingReader(sst, styles, parser, rowCacheSize);
} catch(IOException e) {
throw new OpenException("Failed to open file", e);
} catch(OpenXML4JException | XMLStreamException e) {
throw new ReadException("Unable to read workbook", e);
} catch(GeneralSecurityException e) {
throw new ReadException("Unable to read workbook - Decryption failed", e);
}
}
InputStream findSheet(XSSFReader reader) throws IOException, InvalidFormatException {
int index = sheetIndex;
if(sheetName != null) {
index = -1;
//This file is separate from the worksheet data, and should be fairly small
NodeList nl = searchForNodeList(document(reader.getWorkbookData()), "/workbook/sheets/sheet");
for(int i = 0; i < nl.getLength(); i++) {
if(Objects.equals(nl.item(i).getAttributes().getNamedItem("name").getTextContent(), sheetName)) {
index = i;
}
}
if(index < 0) {
return null;
}
}
Iterator<InputStream> iter = reader.getSheetsData();
InputStream sheet = null;
int i = 0;
while(iter.hasNext()) {
InputStream is = iter.next();
if(i++ == index) {
sheet = is;
log.debug("Found sheet at index [" + sheetIndex + "]");
break;
}
}
return sheet;
}
}
class StreamingIterator implements Iterator<Row> {
public StreamingIterator() {
if(rowCacheIterator == null) {
hasNext();
}
}
@Override
public boolean hasNext() {
return (rowCacheIterator != null && rowCacheIterator.hasNext()) || getRow();
}
@Override
public Row next() {
return rowCacheIterator.next();
}
@Override
public void remove() {
throw new RuntimeException("NotSupported");
}
}
}
这里是我在 java 服务中使用的代码：（这基本上是图书馆在其页面中作为文档提供的内容）
File is = new File("E:\bpc\testdata01.xlsm"));
StreamingReader reader = StreamingReader.builder()
.rowCacheSize(100)
.bufferSize(4096)
.sheetName("SOURCE_1")
.read(is);
所以当 StreamingReader 调用 read(is) 函数时，我抛出以下异常：
java.lang.reflect.InvocationTargetException:Could not initialize class org.apache.poi.POIXMLTypeLoader
我真的很确定为什么会这样...是因为源代码中的构建器 class 是静态的并且它是从我的静态 java 服务调用的吗？
注意：请注意，我运行正在使用这个软件 AG webmethods，它有自己的方式来实现 java 服务，所以我唯一可以放置代码的地方是这样的：（你不能调试 java 服务）
public final class importInputFile_SVC
{
public static final void importInputFile(IData pipeline)
throws ServiceException {
//code goes here
}
}
非常感谢任何帮助。
信息不足，无法真正分析您的问题。但是请尝试将所有库放在包的 code/jars 目录中，并在 manifest.v3 文件中启用包类加载器。这将确保您的 java 服务仅使用您的特定库，而不使用其他版本的 jar，这可能是您 wM 安装的一部分。
编辑：通过添加以下行在 manifest.v3 文件中启用包类加载器：
<value name='classloader'>package</value>