apache POI学习（四）——apache官方读取方式试验

找到官方文档中的读取XML的方法，首先试验一下，这个是试验代码（官方提供仅仅做了一些修改）和结果。

import org.apache.poi.hssf.eventusermodel.HSSFListener;import org.apache.poi.hssf.record.BOFRecord;import org.apache.poi.hssf.record.BoundSheetRecord;import org.apache.poi.hssf.record.LabelSSTRecord;import org.apache.poi.hssf.record.NumberRecord;import org.apache.poi.hssf.record.Record;import org.apache.poi.hssf.record.RowRecord;import org.apache.poi.hssf.record.SSTRecord;/** * This example shows how to use the event API for reading a file. */public class EventExample implements HSSFListener {private SSTRecord sstrec;/** * This method listens for incoming records and handles them as required. *  * @param record *            The record that was found while reading. */public void processRecord(Record record) {switch (record.getSid()) {// the BOFRecord can represent either the beginning of a sheet or the// workbookcase BOFRecord.sid:BOFRecord bof = (BOFRecord) record;if (bof.getType() == bof.TYPE_WORKBOOK) {System.out.println("Encountered workbook");// assigned to the class level member} else if (bof.getType() == bof.TYPE_WORKSHEET) {System.out.println("Encountered sheet reference");}break;case BoundSheetRecord.sid:BoundSheetRecord bsr = (BoundSheetRecord) record;System.out.println("New sheet named: " + bsr.getSheetname());break;case RowRecord.sid:RowRecord rowrec = (RowRecord) record;System.out.println("Row found, first column at " + rowrec.getFirstCol() + " last column at " + rowrec.getLastCol());break;case NumberRecord.sid:NumberRecord numrec = (NumberRecord) record;System.out.println("Cell found with value " + numrec.getValue() + " at row " + numrec.getRow()+ " and column " + numrec.getColumn());break;// SSTRecords store a array of unique strings used in Excel.case SSTRecord.sid:sstrec = (SSTRecord) record;for (int k = 0; k < sstrec.getNumUniqueStrings(); k++) {System.out.println("String table value " + k + " = " + sstrec.getString(k));}break;case LabelSSTRecord.sid:LabelSSTRecord lrec = (LabelSSTRecord) record;System.out.println("String cell found with value " + sstrec.getString(lrec.getSSTIndex()));break;}}}

import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import org.apache.poi.hssf.eventusermodel.HSSFEventFactory;import org.apache.poi.hssf.eventusermodel.HSSFRequest;import org.apache.poi.poifs.filesystem.POIFSFileSystem;public class Main {public static void main(String[] args){// TODO Auto-generated method stubSystem.out.println(123);// create a new file input stream with the input file specified        // at the command line        FileInputStream fin = null;try {fin = new FileInputStream("d:/123/workbook.xls");} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}        // create a new org.apache.poi.poifs.filesystem.Filesystem        POIFSFileSystem poifs = null;try {poifs = new POIFSFileSystem(fin);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}        // get the Workbook (excel part) stream in a InputStream        InputStream din = null;try {din = poifs.createDocumentInputStream("Workbook");} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}        // construct out HSSFRequest object        HSSFRequest req = new HSSFRequest();        // lazy listen for ALL records with the listener shown above        req.addListenerForAllRecords(new EventExample());        // create our event factory        HSSFEventFactory factory = new HSSFEventFactory();        // process our events based on the document input stream        factory.processEvents(req, din);        // once all the events are processed close our file input stream        try {fin.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}        // and our document input stream (don't want to leak these!)        try {din.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}        System.out.println("done.");}}

运行结果：

这是读取的excel文件的截图：