1.首先创建Excel文件类
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
import java.util.UUID;
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.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
public class ExportContract {
public static void expotLog(List<TabContract> logList,HttpServletResponse response) {
// 第一步，创建一个webbook，对应一个Excel文件
HSSFWorkbook wb = new HSSFWorkbook();
// 第二步，在webbook中添加一个sheet,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet("合同管理列表");
// 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
HSSFRow row = sheet.createRow((int) 0);
// 第四步，创建单元格，并设置值表头 设置表头居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式
HSSFCell cell = row.createCell((short) 0);
cell.setCellValue("合同编号");
cell.setCellStyle(style);
cell = row.createCell((short) 1);
cell.setCellValue("合同名称");
cell.setCellStyle(style);
cell = row.createCell((short) 2);
cell.setCellValue("对方名称");
cell.setCellStyle(style);
cell = row.createCell((short) 3);
cell.setCellValue("状态");
cell.setCellStyle(style);
cell = row.createCell((short) 4);
cell.setCellValue("类型");
cell = row.createCell((short) 5);
cell.setCellValue("金额");
cell.setCellStyle(style);
cell = row.createCell((short) 6);
cell.setCellValue("创建者");
cell.setCellStyle(style);
cell = row.createCell((short) 7);
cell.setCellValue("创建时间");
cell.setCellStyle(style);
// 第五步，写入实体数据 实际应用中这些数据从数据库得到，
List list = logList;
for (int i = 0; i < list.size(); i++) {
row = sheet.createRow((int) i + 1);
TabContract tabContract = (TabContract) list.get(i);
// 第四步，创建单元格，并设置值
row.createCell((short) 0).setCellValue(tabContract.getCode());
row.createCell((short) 1).setCellValue(tabContract.getName());
row.createCell((short) 2).setCellValue(tabContract.getOthername());
if("0".equals(tabContract.getContractStatus())){
row.createCell((short) 3).setCellValue("未提交");
}else if("1".equals(tabContract.getContractStatus())){
row.createCell((short) 3).setCellValue("审批中");
}else if("2".equals(tabContract.getContractStatus())){
row.createCell((short) 3).setCellValue("驳回");
}else if("3".equals(tabContract.getContractStatus())){
row.createCell((short) 3).setCellValue("通过");
}
row.createCell((short) 4).setCellValue(tabContract.getContracttype());
row.createCell((short) 5).setCellValue(tabContract.getMoney());
row.createCell((short) 6).setCellValue(tabContract.getCreateBy().getName());
row.createCell((short) 7).setCellValue(tabContract.getCreateDate());
}
// 第六步，下载excel
OutputStream out = null;
String uuid=UUID.randomUUID().toString();
try {
out = response.getOutputStream();
response.setContentType("application/vnd.ms-excel; charset=utf-8");
response.setHeader("Content-Disposition", "attachment;fileName="+uuid+".xls");
response.setCharacterEncoding("utf-8");
wb.write(response.getOutputStream());
HSSFWorkbook wb1 = new HSSFWorkbook();
wb1.write(out);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
2.jsp页面使用checkbox复选框，将选中的数据传递到controller层
if(confirm("确定要导出数据吗？")) {
var obj = document.getElementsByName("checkbox");//选择所有name="interest"的对象，返回数组
if ($(":checkbox[name=checkbox]:checked").size() == 0) {
alert("请至少选择一条记录进行删除操作！");
return;
}
var s='';//如果这样定义var s;变量s中会默认被赋个null值
for(var i=0;i<obj.length;i++){
if(obj[i].checked) //取到对象数组后，我们来循环检测它是不是被选中
s+=obj[i].value+','; //如果选中，将value添加到变量s中
}
s=s.substring(0, s.length-1);
self.location="${ctx}/contract/tabContract/exportcontract?json="+s;
}
此处不能使用ajax向后台传递数据，不然浏览器将无法弹出选择下载地址的窗口