java 导出Execl

1.导入 poi jar包。

2.java 后台代码

package com.admin.bug.dao;

import java.io.File;
import java.io.FileOutputStream;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
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.hssf.util.HSSFColor;

public class CreateExecldao {
/**
* 获取单元格行
* @param wb
* @param rowname
* @param title
* @return
*/
public HSSFRow getRow(HSSFWorkbook wb,String rowname[],String title)
{
HSSFRow row=getSheet(wb, title).createRow((int)0);
for(int i=0;i<rowname.length;i++){
HSSFCell cell=row.createCell(i);
cell.setCellValue(rowname[i]);
cell.setCellStyle(setExeclStyle2(wb));
}

return row;

}



/**
* 获取表格
* @param wb
* @param title
* @return
*/

public HSSFSheet getSheet(HSSFWorkbook wb,String title)
{
try{
HSSFSheet sheet=wb.createSheet(title);
sheet.setDefaultColumnWidth(12);
return sheet;
}catch(Exception e){
return wb.getSheet(title);
}

}

/**
* 设置表格格式
* @param wk
* @return
*/
public HSSFCellStyle setExeclStyle(HSSFWorkbook wb)
{
HSSFCellStyle style=wb.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中
style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
style.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
style.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
style.setWrapText(true);
return style;
}
/**
* 设置字体
* @param wb
* @return
*/
@SuppressWarnings("unused")
public HSSFFont setFont(HSSFWorkbook wb){
HSSFFont font=wb.createFont();
font.setFontName("微软雅黑");
if(font==null){

return font;
}else{
return wb.getFontAt((short) 0);
}
}
/**
* 样式2
* @param wb
* @return
*/
public HSSFCellStyle setExeclStyle2(HSSFWorkbook wb){
// 生成一个样式
HSSFCellStyle style = wb.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = wb.createFont();
//font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 14);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);

return style;
}

/**
* 保存文件
* @param wk
* @param title
* @param url
*/
public void SaveFile(HSSFWorkbook wb,String title,File url)
{
try{
FileOutputStream fout=new FileOutputStream(""+url+"/"+title+".xls");
wb.write(fout);
fout.close();
wb.removeSheetAt(0);
}catch(Exception e){
System.out.println(e);
}
}

}