poi读取excel2007大文件

jar包：poi3.7、xbean、xercesImpl

package com.saxfs;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.xssf.eventusermodel.XSSFReader;
import org.apache.poi.xssf.model.SharedStringsTable;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.XMLReaderFactory;


public abstract class  XxlsAbstract extends DefaultHandler {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}
	
	private SharedStringsTable sst;  
    private String lastContents;  
    private boolean nextIsString;  
  
    private int sheetIndex = -1;  
    private List<String> rowlist = new ArrayList<String>();  
    private int curRow = 0;  
    private int curCol = 0;  
  
    //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 Exception;  
      
    //只遍历一个sheet，其中sheetId为要遍历的sheet索引，从1开始，1-3  
    public void processOneSheet(String filename,int sheetId) throws Exception {  
        OPCPackage pkg = OPCPackage.open(filename);  
        XSSFReader r = new XSSFReader(pkg);  
        SharedStringsTable sst = r.getSharedStringsTable();  
          
        XMLReader parser = fetchSheetParser(sst);  
  
        // rId2 found by processing the Workbook  
        // 根据 rId# 或 rSheet# 查找sheet  
        InputStream sheet2 = r.getSheet("rId"+sheetId);  
        sheetIndex++;  
        InputSource sheetSource = new InputSource(sheet2);  
        parser.parse(sheetSource);  
        sheet2.close();  
    }  
  
    /** 
     * 遍历 excel 文件 
     */  
    public void process(String filename) throws Exception {  
        OPCPackage pkg = OPCPackage.open(filename);  
        XSSFReader r = new XSSFReader(pkg);  
        SharedStringsTable sst = r.getSharedStringsTable();  
  
        XMLReader parser = fetchSheetParser(sst);  
  
        Iterator<InputStream> sheets = r.getSheetsData();  
        while (sheets.hasNext()) {  
            curRow = 0;  
            sheetIndex++;  
            InputStream sheet = sheets.next();  
            InputSource sheetSource = new InputSource(sheet);  
            parser.parse(sheetSource);  
            sheet.close();  
        }  
    }  
  
    public XMLReader fetchSheetParser(SharedStringsTable sst)  
            throws SAXException {  
        XMLReader parser = XMLReaderFactory  
                .createXMLReader("org.apache.xerces.parsers.SAXParser");  
        this.sst = sst;  
        parser.setContentHandler(this);  
        return parser;  
    }  
  
    public void startElement(String uri, String localName, String name,  
            Attributes attributes) throws SAXException {  
        // c => 单元格  
        if (name.equals("c")) {  
            // 如果下一个元素是 SST 的索引，则将nextIsString标记为true  
            String cellType = attributes.getValue("t");  
            if (cellType != null && cellType.equals("s")) {  
                nextIsString = true;  
            } else {  
                nextIsString = false;  
            }  
        }  
        // 置空  
        lastContents = "";  
    }  
  
    public void endElement(String uri, String localName, String name)  
            throws SAXException {  
        // 根据SST的索引值的到单元格的真正要存储的字符串  
        // 这时characters()方法可能会被调用多次  
        if (nextIsString) {  
            try {  
                int idx = Integer.parseInt(lastContents);  
                lastContents = new XSSFRichTextString(sst.getEntryAt(idx))  
                        .toString();  
            } catch (Exception e) {  
  
            }  
        }  
  
        //t 是数据标签  
        // 将单元格内容加入rowlist中，在这之前先去掉字符串前后的空白符  
        if (name.equals("v")) {  
            String value = lastContents.trim();  
            value = value.equals("")?" ":value;  
            rowlist.add(curCol, value);  
            curCol++;  
        }else if(name.equals("t")){
            String value = lastContents.trim();  
            value = value.equals("")?" ":value;  
            rowlist.add(curCol, value);  
            curCol++; 
        }else {  
            //如果标签名称为 row ，这说明已到行尾，调用 optRows() 方法  
            if (name.equals("row")) {  
                try {  
                    optRows(sheetIndex,curRow,rowlist);  
                } catch (Exception e) {  
                    e.printStackTrace();  
                }  
                rowlist.clear();  
                curRow++;  
                curCol = 0;  
            }  
        }  
    }  
  
    public void characters(char[] ch, int start, int length)  
            throws SAXException {  
        //得到单元格内容的值  
        lastContents += new String(ch, start, length);  
    }  

}

测试类如下：

package com.saxfs;

import java.util.List;

public class XxlsPrint extends XxlsAbstract {

	@Override
	public void optRows(int sheetIndex, int curRow, List<String> rowlist)
			throws Exception {
		for (int i = 0; i < rowlist.size(); i++) {  
            System.out.print("'" + rowlist.get(i) + "',");  
        }  
        System.out.println();  
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		XxlsPrint howto = new XxlsPrint();  
        try {
			howto.processOneSheet("f:/dcs/cess.xlsx",3);
			//完整的代码
			//howto.process("f:/dcs/cess.xlsx");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}  
	}

}