java-运用Spring实现Excel报表

如果想使用excel展示用户列表,仅需扩展Spring的AbstractExcelView 或AbstractJExcelView ,实现buildExcelDocument()方法,在方法中使用模型数据对象构造Excel文档

代码:

package com.accp.web;

import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.time.DateFormatUtils;
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.springframework.web.servlet.view.document.AbstractE

xcelView;

import com.accp.domain.User;

/**
 * 显示用户列表Excel的视图类
 * @author Administrator
 *
 */
public class UserListExcelView extends

AbstractExcelView {

 @SuppressWarnings("unchecked")
 @Override
 protected void buildExcelDocument(Map<String,

Object> model,
   HSSFWorkbook workbook,

HttpServletRequest request, HttpServletResponse

reponse)
   throws Exception {
  reponse.setHeader("Content-

Disposition", "inline;filename="+new String("用户列

表".getBytes(),"iso-8859-1"));
  List<User> userList =(List<User>)

model.get("userList");
  HSSFSheet sheet = workbook.createSheet

("users");
  HSSFRow header = sheet.createRow(0);
  header.createCell(0).setCellValue(new

HSSFRichTextString("姓名"));
  header.createCell(1).setCellValue(new

HSSFRichTextString("积分"));
  header.createCell(2).setCellValue(new

HSSFRichTextString("最后登录时间"));
  int rowNum = 1;
  for(User  user: userList){
   HSSFRow row = sheet.createRow

(rowNum++);
   row.createCell(0).setCellValue

(new HSSFRichTextString(user.getUserName()));
   row.createCell(1).setCellValue

(user.getCredit());
   String createDate  =

DateFormatUtils.format(user.getLastVisit(),"YYYY-MM-

dd");
   row.createCell(2).setCellValue

(new HSSFRichTextString(createDate));
   
  }
 }
}

2.在前端控制器中添加一个相应的请求处理方法:

@Controller()
@RequestMapping("/user")
public class UserController {

@RequestMapping( "showUserListByXls")
 public String showUserListInExcel(ModelMap mm) {
  Calendar calendar = new GregorianCalendar();

  List<User> userList = new ArrayList<User>();
  User user1 = new User();
  user1.setUserName("tom");
  user1.setCredit(20);
  calendar.set(1980, 1, 1);
  user1.setLastVisit((calendar.getTime()));
  User user2 = new User();
  user2.setUserName("john");
  user2.setCredit(10);
  user2.setLastVisit(calendar.getTime());
  userList.add(user1);
  userList.add(user2);
  mm.addAttribute("userList", userList);
  return "userListExcel";
 }
}
}

3.在xxx-servlet-xml中配置视图解析器:

 <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"  p:order="10"/>
      <bean id="userListExcel" class="com.contorller.UserListExcelView">

   </bean>