Java导出Excel和CSV(简单Demo)

Java导出Excel和CSV的简单实现，分别使用POI和JavaCSV。

JavaBean

public class ExportUtil {

public static void main(String[] args) throws FileNotFoundException, IOException{

List<ReportInfo> list = new ArrayList<ReportInfo>();
createData(list);
exportCSV(list, "/tmp/report.csv");
exportExcel(list, "/tmp/report.xls");
}

public static void exportCSV(List<ReportInfo> list, String filePath) throws IOException{
File file = new File(filePath);
if(file.exists())
file.delete();
CsvWriter wr = new CsvWriter(filePath, ',', Charset.forName("UTF-8"));
String[] contents = {"No", "date", "num", "percent"};
wr.writeRecord(contents);
ReportInfo info = new ReportInfo();
for(int i = 0; i < list.size(); i++){
info = list.get(i);
contents[0] = String.valueOf(info.getId());
contents[1] = info.getDate();
contents[2] = String.valueOf(info.getNum());
contents[3] = info.getPercent() + "%";
wr.writeRecord(contents);
}
wr.close();
}

public static void exportExcel(List<ReportInfo> list, String filePath) throws IOException{

File file = new File(filePath);//"/tmp/tmpfiles/workbook.xls"
if(file.exists())
file.delete();
FileOutputStream fileOut = new FileOutputStream(filePath);//创建excel表格//"/tmp/tmpfiles/workbook.xls"
Workbook wb = new HSSFWorkbook();//获取workbook
//FileOutputStream fileOut = new FileOutputStream("workbook.xls");
HSSFSheet sheet = (HSSFSheet) wb.createSheet("report");// 生成一个表格

sheet.setColumnWidth(1, 4000);

HSSFRow row = sheet.createRow((short)0);//创建行并插入表头
row.createCell(0).setCellValue("No");
row.createCell(1).setCellValue("date");
row.createCell(2).setCellValue("num");
row.createCell(3).setCellValue("percent");

ReportInfo info = new ReportInfo();
for(int i = 1; i <= list.size(); i++){//循环插入数据
info = list.get(i-1);
row = sheet.createRow(i);
row.createCell(0).setCellValue(info.getId());
row.createCell(1).setCellValue(info.getDate());
row.createCell(2).setCellValue(info.getNum());
row.createCell(3).setCellValue(info.getPercent()+"%");
}

wb.write(fileOut);
fileOut.close();
}

public static void createData(List<ReportInfo> list){
ReportInfo tp = new ReportInfo();
tp.setId(1);
tp.setNum(2);
tp.setPercent(50);
tp.setDate("2013-08-20");
list.add(tp);
}

}

View Code
后来看到xwdreamer的一篇文章，使用了Java的泛型和反射将JavaBean的属性依次填充到Excel行中，如能自由指定JavaBean的属性所在列效果更好。

POI的官方快速入门示例：http://poi.apache.org/spreadsheet/quick-guide.html