怎么用java把数据库里的数据写入到excel表中

你是想读取excel内容，然后整合一下数据，然后再生成一个新的excel吧

package aa;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.InputStream;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.poifs.filesystem.POIFSFileSystem;

//你是想读个excel内容，然后整合一下里面数据，然后再生成一个新的excel吧。

public class A {

public static void main(String[] args) throws Exception{

//读取excel：

InputStream is = new FileInputStream("d:\\test2.xls");

POIFSFileSystem fs = new POIFSFileSystem(is);

HSSFWorkbook wb = new HSSFWorkbook(fs);

//读取sheet，读取sheet里面第一行第一列内容

HSSFSheet sheet = wb.getSheetAt(0);

HSSFRow row = sheet.getRow(0);

HSSFCell cell = row.getCell((short) 0);

String s = cell.getStringCellValue();

System.out.println(s);

//...内容组合自己玩~

//比如上面组合好了一个String S2

//写入一个excel 比如 test3.xls

FileOutputStream fos = new FileOutputStream("d:\\test3.xls");

HSSFWorkbook wb2 = new HSSFWorkbook();

HSSFSheet hsSheet = wb2.createSheet("TestReport");

HSSFRow hsRow1 = hsSheet.createRow(0);//建行

hsRow1.setHeight((short) 500);

HSSFCell hsCell11 = hsRow1.createCell((short) 0);

hsCell11.setEncoding(HSSFCell.ENCODING_UTF_16);

hsCell11.setCellValue(s "TESTVALUE");

wb2.write(fos);

fos.close();

}

}

是这么玩吧~

JAVA使用poi包，向Excel中写入批量数据

public static void drawExcel(HSSFWorkbook wb, String sheetName, String title, int n, List exlList, int[] index){

List exList =(List)exlList;

int len = exList.get(0).length;

// 创建一sheet表单

HSSFSheet sheet = wb.createSheet(sheetName);

Region region = null;

//样式

HSSFCellStyle cellStyle1 = setStyleBorder(wb);

HSSFCellStyle cellStyle2 = setStyleFontBorder(wb);

// 创建标题行

HSSFRow row = sheet.createRow(0);

row.setHeight((short)500);

// 创元格

HSSFCell cell = null;

if(title != null