解决POI导出Excel文件内存溢出问题

package com.java.test;
import java.io.FileOutputStream;
import org.apache.commons.lang.exception.ExceptionUtils;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;

/**
 * 解决POI导出Excel文件内存溢出问题
 * @author pyi
 */
public class Test3 {

	public static void main(String[] args) {
		sxssfTest();
	}

	/**
	 * 在poi3.8之后为解决内存溢出,针对excel2007提出一个新类SXSSFWorkbook
	 */
	public static void sxssfTest() {

		try {
			/**
			 * new SXSSFWorkbook(100)
			 * 这里SXSSFWorkbook类采用一边读取一边写的方式,每次写完就释放前者所创建的row对象
			 * 100则是表示每次读取和创建的row的个数
			 */
			Workbook wb = new SXSSFWorkbook(100);
			Sheet sh = wb.createSheet();
			int rownum = 0;

			while (true) {
				Row row = sh.createRow(rownum);
				for (int cellnum = 0; cellnum < 10; cellnum++) {
					Cell cell = row.createCell(cellnum);
					String address = new CellReference(cell).formatAsString();
					cell.setCellValue(address);
				}
				System.out.println(rownum);
				rownum++;
				if (rownum >= 10000)
					break;
			}

			FileOutputStream out = new FileOutputStream("E:/temp/sxssf.xlsx");
			wb.write(out);
			out.close();
		} catch (Exception e) {
			System.out.println(ExceptionUtils.getFullStackTrace(e));
		}
	}

}