一、应用场景
列表数据Excel表格导出
需要用到的工具类：ExportExcelUtils
package com.purete.agent.config.sys.poi;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
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.HSSFRichTextString;
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;
import org.apache.poi.ss.util.CellRangeAddress;
/**
* poi导出
* @author Administrator
*
*/
public class ExportExcelUtils {
private String title; // 导出表格的表名
private String[] rowName;// 导出表格的列名
private List<Object[]> dataList = new ArrayList<Object[]>(); // 对象数组的List集合
private HttpServletResponse response;
// 传入要导入的数据
public ExportExcelUtils(String title,String[] rowName,List<Object[]> dataList,HttpServletResponse response){
this.title=title;
this.rowName=rowName;
this.dataList=dataList;
this.response = response;
}
// 导出数据
public void exportData(){
try {
HSSFWorkbook workbook =new HSSFWorkbook(); // 创建一个excel对象
HSSFSheet sheet =workbook.createSheet(title); // 创建表格
// 产生表格标题行
HSSFRow rowm =sheet.createRow(0); // 行
HSSFCell cellTiltle =rowm.createCell(0); // 单元格
// sheet样式定义
HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook); // 头样式
HSSFCellStyle style = this.getStyle(workbook); // 单元格样式
/**
* 参数说明
* 从0开始 第一行 第一列 都是从角标0开始
* 行 列 行列 (0,0,0,5) 合并第一行 第一列 到第一行 第六列
* 起始行，起始列，结束行，结束列
*
* new Region() 这个方法使过时的
*/
// 合并第一行的所有列
sheet.addMergedRegion(new CellRangeAddress(0, (short) 0, 0, (short) (rowName.length-1)));
cellTiltle.setCellStyle(columnTopStyle);
cellTiltle.setCellValue(title);
int columnNum = rowName.length; // 表格列的长度
HSSFRow rowRowName = sheet.createRow(1); // 在第二行创建行
HSSFCellStyle cells =workbook.createCellStyle();
cells.setBottomBorderColor(HSSFColor.BLACK.index);
rowRowName.setRowStyle(cells);
// 循环 将列名放进去
for (int i = 0; i < columnNum; i++) {
HSSFCell cellRowName = rowRowName.createCell((int)i);
cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING); // 单元格类型
HSSFRichTextString text = new HSSFRichTextString(rowName[i]); // 得到列的值
cellRowName.setCellValue(text); // 设置列的值
cellRowName.setCellStyle(columnTopStyle); // 样式
}
// 将查询到的数据设置到对应的单元格中
for (int i = 0; i < dataList.size(); i++) {
Object[] obj = dataList.get(i);//遍历每个对象
HSSFRow row = sheet.createRow(i+2);//创建所需的行数
for (int j = 0; j < obj.length; j++) {
HSSFCell cell = null; //设置单元格的数据类型
if(j==0){
// 第一列设置为序号
cell = row.createCell(j,HSSFCell.CELL_TYPE_NUMERIC);
cell.setCellValue(i+1);
}else{
cell = row.createCell(j,HSSFCell.CELL_TYPE_STRING);
if(!"".equals(obj[j]) && obj[j] != null){
cell.setCellValue(obj[j].toString()); //设置单元格的值
}else{
cell.setCellValue(" ");
}
}
cell.setCellStyle(style); // 样式
}
}
// 让列宽随着导出的列长自动适应
sheet.autoSizeColumn((short)0); //调整第一列宽度
sheet.autoSizeColumn((short)1); //调整第二列宽度
sheet.autoSizeColumn((short)2); //调整第三列宽度
sheet.autoSizeColumn((short)3); //调整第四列宽度
sheet.autoSizeColumn((short)4); //调整第五列宽度
sheet.autoSizeColumn((short)5); //调整第六列宽度
if(workbook !=null){
try
{
// excel 表文件名
String fileName = title + ".xls";
String fileName11 = URLEncoder.encode(fileName,"UTF-8");
String fileName12 = java.net.URLDecoder.decode(fileName11, "UTF-8");
String headStr = "attachment; filename=\"" + fileName12 + "\"";
// System.out.println(headStr);
response.setContentType("APPLICATION/OCTET-STREAM");
// response.setHeader("Content-Disposition", headStr);
response.setHeader("Content-Disposition", "attachment;filename=" + new String(fileName12.getBytes("gb2312"), "ISO8859-1" ));
OutputStream out = response.getOutputStream();
workbook.write(out);
out.flush();
out.close();
}
catch (IOException e)
{
e.printStackTrace();
}
}
}catch(Exception e){
e.printStackTrace();
}
}
public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {
// 设置字体
HSSFFont font = workbook.createFont();
//设置字体大小
font.setFontHeightInPoints((short)11);
//字体加粗
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//设置字体名字
font.setFontName("Courier New");
//设置样式;
HSSFCellStyle style = workbook.createCellStyle();
//设置底边框;
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//设置底边框颜色;
style.setBottomBorderColor(HSSFColor.BLACK.index);
//设置左边框;
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
//设置左边框颜色;
style.setLeftBorderColor(HSSFColor.BLACK.index);
//设置右边框;
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//设置右边框颜色;
style.setRightBorderColor(HSSFColor.BLACK.index);
//设置顶边框;
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
//设置顶边框颜色;
style.setTopBorderColor(HSSFColor.BLACK.index);
//在样式用应用设置的字体;
style.setFont(font);
//设置自动换行;
style.setWrapText(false);
//设置水平对齐的样式为居中对齐;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//设置垂直对齐的样式为居中对齐;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
return style;
}
public HSSFCellStyle getStyle(HSSFWorkbook workbook) {
// 设置字体
HSSFFont font = workbook.createFont();
//设置字体大小
//font.setFontHeightInPoints((short)10);
//字体加粗
//font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//设置字体名字
font.setFontName("Courier New");
//设置样式;
HSSFCellStyle style = workbook.createCellStyle();
//设置底边框;
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//设置底边框颜色;
style.setBottomBorderColor(HSSFColor.BLACK.index);
//设置左边框;
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
//设置左边框颜色;
style.setLeftBorderColor(HSSFColor.BLACK.index);
//设置右边框;
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//设置右边框颜色;
style.setRightBorderColor(HSSFColor.BLACK.index);
//设置顶边框;
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
//设置顶边框颜色;
style.setTopBorderColor(HSSFColor.BLACK.index);
//在样式用应用设置的字体;
style.setFont(font);
//设置自动换行;
style.setWrapText(false);
//设置水平对齐的样式为居中对齐;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//设置垂直对齐的样式为居中对齐;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
return style;
}
public static String dataFormat (Date Date){
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String format = simpleDateFormat.format(new Date());
return format;
}
}
后台接口：
//设备使用信息导出
@RequestMapping(value="/exportinfo",method = { RequestMethod.GET,RequestMethod.POST})
@ResponseBody
public void exportinfo(HttpServletRequest request,HttpServletResponse response,Long id,Map<String, Object> map)
{
map.put("id",id);
List<DeviceUsageEntity> wordsList = deviceUsageService.queryListdetails(map);
if (wordsList.size() != 0)
{
try
{
String title =wordsList.get(0).getDeviceInfo().getName()+"使用详情";
String[] rowsName = new String[] {"序号","设备id", "会员昵称", "使用时长","状态","开始使用时间", "结束使用时间"};
List<Object[]> dataList = new ArrayList<Object[]>();
Object[] objs = null;
for (int i = 0; i < wordsList.size(); i++)
{
objs = new Object[rowsName.length];
objs[0] = " "+i+ " ";
objs[1] = wordsList.get(i).getDeviceInfo().getUuid();
objs[2] = " "+wordsList.get(i).getDeviceUser().getNickname()+ " ";
objs[3]= wordsList.get(i).getDuration()==null ? " " : " "+wordsList.get(i).getDuration()+"分钟"+ " " ;
objs[4]= wordsList.get(i).getStatus().equals("0") ? "正常 " : "故障" ;
objs[5] = ExportExcelUtils.dataFormat(wordsList.get(i).getStartTime());
objs[6] = ExportExcelUtils.dataFormat(wordsList.get(i).getEndTime());
dataList.add(objs);
}
ExportExcelUtils ex = new ExportExcelUtils(title, rowsName, dataList, response);
ex.exportData();
}
catch (Exception e)
{
e.printStackTrace();
}
}
} 效果图：
备注：状态列是后面加的，字典转换。