大数据量的excel读取poi实际应用
原文：http://dpn525.iteye.com/blog/860422
1、HxlsAbstract.java
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintStream;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.eventusermodel.FormatTrackingHSSFListener;
import org.apache.poi.hssf.eventusermodel.HSSFEventFactory;
import org.apache.poi.hssf.eventusermodel.HSSFListener;
import org.apache.poi.hssf.eventusermodel.HSSFRequest;
import org.apache.poi.hssf.eventusermodel.MissingRecordAwareHSSFListener;
import org.apache.poi.hssf.eventusermodel.EventWorkbookBuilder.SheetRecordCollectingListener;
import org.apache.poi.hssf.eventusermodel.dummyrecord.LastCellOfRowDummyRecord;
import org.apache.poi.hssf.eventusermodel.dummyrecord.MissingCellDummyRecord;
import org.apache.poi.hssf.model.HSSFFormulaParser;
import org.apache.poi.hssf.record.BOFRecord;
import org.apache.poi.hssf.record.BlankRecord;
import org.apache.poi.hssf.record.BoolErrRecord;
import org.apache.poi.hssf.record.BoundSheetRecord;
import org.apache.poi.hssf.record.FormulaRecord;
import org.apache.poi.hssf.record.LabelRecord;
import org.apache.poi.hssf.record.LabelSSTRecord;
import org.apache.poi.hssf.record.NoteRecord;
import org.apache.poi.hssf.record.NumberRecord;
import org.apache.poi.hssf.record.RKRecord;
import org.apache.poi.hssf.record.Record;
import org.apache.poi.hssf.record.SSTRecord;
import org.apache.poi.hssf.record.StringRecord;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
/**
* @项目名：保密
* @包名：保密
* @文件名：HxlsAbstract.java
* @日期：Dec 24, 2010 10:54:52 AM
* @备注：POI导入excel（大数据量）
* @作者：apple
*/
public abstract class HxlsAbstract implements HSSFListener {
private int minColumns;
private POIFSFileSystem fs;
private PrintStream output;
private int lastRowNumber;
private int lastColumnNumber;
/** Should we output the formula, or the value it has? */
private boolean outputFormulaValues = true;
/** For parsing Formulas */
private SheetRecordCollectingListener workbookBuildingListener;
private HSSFWorkbook stubWorkbook;
// Records we pick up as we process
private SSTRecord sstRecord;
private FormatTrackingHSSFListener formatListener;
/** So we known which sheet we're on */
private int sheetIndex = -1;
private BoundSheetRecord[] orderedBSRs;
@SuppressWarnings("unchecked")
private ArrayList boundSheetRecords = new ArrayList();
// For handling formulas with string results
private int nextRow;
private int nextColumn;
private boolean outputNextStringRecord;
private int curRow;
private List<String> rowlist;
@SuppressWarnings( "unused")
private String sheetName;
public HxlsAbstract(POIFSFileSystem fs)
throws SQLException {
this.fs = fs;
this.output = System.out;
this.minColumns = -1;
this.curRow = 0;
this.rowlist = new ArrayList<String>();
}
public HxlsAbstract(String filename) throws IOException,
FileNotFoundException, SQLException {
this(new POIFSFileSystem(new FileInputStream(filename)));
}
//excel记录行操作方法，以行索引和行元素列表为参数，对一行元素进行操作，元素为String类型
// public abstract void optRows(int curRow, List<String> rowlist) throws SQLException ;
//excel记录行操作方法，以sheet索引，行索引和行元素列表为参数，对sheet的一行元素进行操作，元素为String类型
public abstract void optRows(int sheetIndex,int curRow, List<String> rowlist) throws SQLException;
/**
* 遍历 excel 文件
*/
public void process() throws IOException {
MissingRecordAwareHSSFListener listener = new MissingRecordAwareHSSFListener(
this);
formatListener = new FormatTrackingHSSFListener(listener);
HSSFEventFactory factory = new HSSFEventFactory();
HSSFRequest request = new HSSFRequest();
if (outputFormulaValues) {
request.addListenerForAllRecords(formatListener);
} else {
workbookBuildingListener = new SheetRecordCollectingListener(
formatListener);
request.addListenerForAllRecords(workbookBuildingListener);
}
factory.processWorkbookEvents(request, fs);
}
/**
* HSSFListener 监听方法，处理 Record
*/
@SuppressWarnings("unchecked")
public void processRecord(Record record) {
int thisRow = -1;
int thisColumn = -1;
String thisStr = null;
String value = null;
switch (record.getSid()) {
case BoundSheetRecord.sid:
boundSheetRecords.add(record);
break;
case BOFRecord.sid:
BOFRecord br = (BOFRecord) record;
if (br.getType() == BOFRecord.TYPE_WORKSHEET) {
// Create sub workbook if required
if (workbookBuildingListener != null && stubWorkbook == null) {
stubWorkbook = workbookBuildingListener
.getStubHSSFWorkbook();
}
// Works by ordering the BSRs by the location of
// their BOFRecords, and then knowing that we
// process BOFRecords in byte offset order
sheetIndex++;
if (orderedBSRs == null) {
orderedBSRs = BoundSheetRecord
.orderByBofPosition(boundSheetRecords);
}
sheetName = orderedBSRs[sheetIndex].getSheetname();
}
break;
case SSTRecord.sid:
sstRecord = (SSTRecord) record;
break;
case BlankRecord.sid:
BlankRecord brec = (BlankRecord) record;
thisRow = brec.getRow();
thisColumn = brec.getColumn();
thisStr = "";
break;
case BoolErrRecord.sid:
BoolErrRecord berec = (BoolErrRecord) record;
thisRow = berec.getRow();
thisColumn = berec.getColumn();
thisStr = "";
break;
case FormulaRecord.sid:
FormulaRecord frec = (FormulaRecord) record;
thisRow = frec.getRow();
thisColumn = frec.getColumn();
if (outputFormulaValues) {
if (Double.isNaN(frec.getValue())) {
// Formula result is a string
// This is stored in the next record
outputNextStringRecord = true;
nextRow = frec.getRow();
nextColumn = frec.getColumn();
} else {
thisStr = formatListener.formatNumberDateCell(frec);
}
} else {
thisStr = '"' + HSSFFormulaParser.toFormulaString(stubWorkbook,
frec.getParsedExpression()) + '"';
}
break;
case StringRecord.sid:
if (outputNextStringRecord) {
// String for formula
StringRecord srec = (StringRecord) record;
thisStr = srec.getString();
thisRow = nextRow;
thisColumn = nextColumn;
outputNextStringRecord = false;
}
break;
case LabelRecord.sid:
LabelRecord lrec = (LabelRecord) record;
curRow = thisRow = lrec.getRow();
thisColumn = lrec.getColumn();
value = lrec.getValue().trim();
value = value.equals("")?" ":value;
this.rowlist.add(thisColumn, value);
break;
case LabelSSTRecord.sid:
LabelSSTRecord lsrec = (LabelSSTRecord) record;
curRow = thisRow = lsrec.getRow();
thisColumn = lsrec.getColumn();
if (sstRecord == null) {
rowlist.add(thisColumn, " ");
} else {
value = sstRecord
.getString(lsrec.getSSTIndex()).toString().trim();
value = value.equals("")?" ":value;
rowlist.add(thisColumn,value);
}
break;
case NoteRecord.sid:
NoteRecord nrec = (NoteRecord) record;
thisRow = nrec.getRow();
thisColumn = nrec.getColumn();
// TODO: Find object to match nrec.getShapeId()
thisStr = '"' + "(TODO)" + '"';
break;
case NumberRecord.sid:
NumberRecord numrec = (NumberRecord) record;
curRow = thisRow = numrec.getRow();
thisColumn = numrec.getColumn();
value = formatListener.formatNumberDateCell(numrec).trim();
value = value.equals("")?" ":value;
// Format
rowlist.add(thisColumn, value);
break;
case RKRecord.sid:
RKRecord rkrec = (RKRecord) record;
thisRow = rkrec.getRow();
thisColumn = rkrec.getColumn();
thisStr = '"' + "(TODO)" + '"';
break;
default:
break;
}
// 遇到新行的操作
if (thisRow != -1 && thisRow != lastRowNumber) {
lastColumnNumber = -1;
}
// 空值的操作
if (record instanceof MissingCellDummyRecord) {
MissingCellDummyRecord mc = (MissingCellDummyRecord) record;
curRow = thisRow = mc.getRow();
thisColumn = mc.getColumn();
rowlist.add(thisColumn," ");
}
// 如果遇到能打印的东西，在这里打印
if (thisStr != null) {
if (thisColumn > 0) {
output.print(',');
}
output.print(thisStr);
}
// 更新行和列的值
if (thisRow > -1)
lastRowNumber = thisRow;
if (thisColumn > -1)
lastColumnNumber = thisColumn;
// 行结束时的操作
if (record instanceof LastCellOfRowDummyRecord) {
if (minColumns > 0) {
// 列值重新置空
if (lastColumnNumber == -1) {
lastColumnNumber = 0;
}
}
// 行结束时， 调用 optRows() 方法
lastColumnNumber = -1;
try {
optRows(sheetIndex,curRow, rowlist);
} catch (SQLException e) {
e.printStackTrace();
}
rowlist.clear();
}
}
}
2、SPImportAction.java
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import net.hlj.cms.gnet.model.SPModel;
import net.hlj.cms.gnet.service.SPImportService;
import net.hlj.cms.gnet.service.imp.SPImportServiceImpl;
import net.hlj.cms.gnet.util.HxlsAbstract;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
/**
* @项目名：保密
* @包名：保密
* @文件名：SPImportAction.java
* @日期：Dec 23, 2010 3:54:16 PM
* @备注：增值业务导入
* @作者：apple
*/
public class SPImportAction extends HxlsAbstract{
private static String fileName="增值业务(测试库).xls";//文件名
private static String path="D:\\net\\";//路径
private ApplicationContext ctx = new FileSystemXmlApplicationContext("/WebRoot/WEB-INF/applicationContext.xml");//spring 上下文
private SPImportService server=new SPImportServiceImpl();//接口
private static int count=0;
private static int successCount=0;
private static int failCount=0;
private static ArrayList errorList=new ArrayList();
/**
* @param args
*/
public static void main(String[] args)
{
SPImportAction excel;//excel对象
try
{
excel=new SPImportAction(path+fileName);
excel.process();
System.out.println("一共："+count+"条数据");
System.out.println("成功："+successCount+"条数据");
System.out.println("失败："+failCount+"条数据");
for(int i=0;i<errorList.size();i++)
{
System.out.println("失败行数："+errorList.get(i));
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}
@Override
public void optRows(int sheetIndex,int curRow, List<String> rowlist) throws SQLException
{
String row="";
if(curRow>0)
{
if( rowlist.size()==8)
{
for (int i = 0 ;i< rowlist.size();i++){
row+=rowlist.get(i)+",";
}
SPModel obj=new SPModel();
obj.setPRODUCTID(rowlist.get(1));
obj.setV_busiCode(rowlist.get(2));
obj.setV_busiName(rowlist.get(4));
obj.setV_busiDes(rowlist.get(5));
obj.setEFFDATE(rowlist.get(6));
obj.setEXPDATE(rowlist.get(7));
if(rowlist.get(3).equals("4"))
{
obj.setFlag("1");
}
else
{
obj.setFlag("0");
}
if(server.isSP(obj, ctx))
{
int uflag=server.SPUpdate(obj, ctx);
if(uflag>0)
{
successCount++;
System.out.println("第"+rowlist.get(0)+"行数据修改成功");
}
else
{
failCount++;
System.out.println("第"+rowlist.get(0)+"行数据修改失败");
errorList.add(rowlist.get(0));
}
}
else
{
int aflag=server.SPAdd(obj, ctx);
if(aflag>0)
{
successCount++;
System.out.println("第"+rowlist.get(0)+"行数据新增成功");
}
else
{
failCount++;
System.out.println("第"+rowlist.get(0)+"行数据新增失败");
errorList.add(rowlist.get(0));
}
}
count++;
System.out.println(row.substring(0,row.length()-1));
}
}
}
public SPImportAction(String filename) throws IOException,FileNotFoundException, SQLException
{
super(filename);
}
}
