1.先写Execl 工具类 两个
package com.utils.excel;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.LocalizedResourceHelper;
import org.springframework.web.servlet.support.RequestContextUtils;
import org.springframework.web.servlet.view.AbstractView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayOutputStream;
import java.util.Locale;
import java.util.Map;
public abstract class XlsxAbstractExcelView extends AbstractView {
/** The content type for an Excel response */
private static final String CONTENT_TYPE = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
/** The extension to look for existing templates */
private static final String EXTENSION = ".xlsx";
private String url;
/** * Default Constructor. * Sets the content type of the view to "application/vnd.ms-excel". */
public XlsxAbstractExcelView() {
setContentType(CONTENT_TYPE);
}
public void setUrl(String url) {
this.url = url;
}
@Override
protected boolean generatesDownloadContent() {
return true;
}
/**
* Renders the Excel view, given the specified model.
*/
@Override
protected final void renderMergedOutputModel(
Map model, HttpServletRequest request, HttpServletResponse response) throws Exception {
Workbook workbook;
ByteArrayOutputStream baos = createTemporaryOutputStream();
/*if (this.url != null) {
workbook = getTemplateSource(this.url, request);
}
else {*/
workbook = new XSSFWorkbook();
logger.debug("Created Excel Workbook from scratch");
//}
buildExcelDocument(model, workbook, request, response);
// Set the content type.
//response.setContentType(getContentType());
// Should we set the content length here?
// response.setContentLength(workbook.getBytes().length);
// Flush byte array to servlet output stream.
//ServletOutputStream out = response.getOutputStream();
workbook.write(baos);
writeToResponse(response, baos);
//out.flush();
}
protected Workbook getTemplateSource(String url, HttpServletRequest request) throws Exception {
LocalizedResourceHelper helper = new LocalizedResourceHelper(getApplicationContext());
Locale userLocale = RequestContextUtils.getLocale(request);
Resource inputFile = helper.findLocalizedResource(url, EXTENSION, userLocale);
// Create the Excel document from the source.
if (logger.isDebugEnabled()) {
logger.debug("Loading Excel workbook from " + inputFile);
}
//POIFSFileSystem fs = new POIFSFileSystem(inputFile.getInputStream());
return new XSSFWorkbook(inputFile.getInputStream());
}
protected abstract void buildExcelDocument(
Map model, Workbook workbook, HttpServletRequest request, HttpServletResponse response)
throws Exception;
protected Cell getCell(Sheet sheet, int row, int col) {
Row sheetRow = sheet.getRow(row);
if (sheetRow == null) {
sheetRow = sheet.createRow(row);
}
Cell cell = sheetRow.getCell(col);
if (cell == null) {
cell = sheetRow.createCell(col);
}
return cell;
}
protected void setText(Cell cell, String text) {
cell.setCellType(CellType.STRING);
cell.setCellValue(text);
}
}
package com.utils.excel;
import org.apache.poi.ss.usermodel.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
import java.util.Map;
/**
* Excel导出
*/
public class ObjectExcelView extends XlsxAbstractExcelView {
@Override
protected void buildExcelDocument(Map model, Workbook workbook, HttpServletRequest request, HttpServletResponse response) throws Exception {
Sheet sheet;
Cell cell;
workbook.createName().setNameName(model.get("fileName").toString());
sheet = workbook.createSheet(model.get("sheetName").toString());
List titles = (List) model.get("titles");
int len = titles.size();
CellStyle headerStyle = workbook.createCellStyle(); // 标题样式
headerStyle.setAlignment(HorizontalAlignment.CENTER);
headerStyle.setVerticalAlignment(VerticalAlignment.CENTER);
Font headerFont = workbook.createFont(); // 标题字体
headerFont.setBold(true);
headerFont.setFontHeightInPoints((short) 11);
headerStyle.setFont(headerFont);
int width = 20;
short height = 25 * 20;
sheet.setDefaultColumnWidth(width);
for (int i = 0; i < len; i++) { // 设置标题
String title = titles.get(i);
cell = getCell(sheet, 0, i);
cell.setCellStyle(headerStyle);
setText(cell, title);
}
sheet.getRow(0).setHeight(height);
CellStyle contentStyle = workbook.createCellStyle(); // 内容样式
contentStyle.setAlignment(HorizontalAlignment.CENTER);
List> varList = (List>) model.get("varList");
int varCount = varList.size();
for (int i = 0; i < varCount; i++) {
Map vpd = varList.get(i);
for (int j = 0; j < len; j++) {
Object varstr = vpd.get("var" + (j + 1)) != null ? vpd.get("var" + (j + 1)) : "";
cell = getCell(sheet, i + 1, j);
cell.setCellStyle(contentStyle);
setText(cell, varstr.toString());
}
}
}
}
2.controller 测试方法
package com.controller.download;
import com.service.UserService;
import com.utils.BaseUtils;
import com.utils.ResultJson;
import com.utils.excel.ObjectExcelView;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import java.util.*;
/**
* @Author SPF
* @Date 2017/5/24
*/
@Controller
public class ExeclDownController extends BaseUtils {
@Autowired private UserService userService;
@RequestMapping("/down/index")
public String index(ModelMap model) {
ResultJson n = userService.findAll();
List> list = n.getDatas();
model.addAttribute("data", list);
return "down/index";
}
@RequestMapping("/down")
public ModelAndView down() {
Map model = new HashMap();
ResultJson n = userService.findAll();
List> list = n.getDatas();
model.put("fileName","测试execl下载");
model.put("sheetName","测试execl下载");
model.put("titles", Arrays.asList(new String[]{"序号","姓名","年龄","性别","手机","密码"}));
List> r = new ArrayList>();
for (Map map : list) {
Map m = new HashMap();
m.put("var1",map.get("id"));
m.put("var2",map.get("name"));
m.put("var3",map.get("age"));
m.put("var4",map.get("sex"));
m.put("var5",map.get("phone"));
m.put("var6",map.get("pwd"));
r.add(m);
}
model.put("varList",r);
return new ModelAndView(new ObjectExcelView(),model);
}
}
3.html页面
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
execl导出
| 序号 | 姓名 | 年龄 | 性别 | 手机 | 密码 |
|---|---|---|---|---|---|
| ${ite.id} | ${ite.name} | ${ite.age} | ${ite.sex} | ${ite.phone} | ${ite.pwd} |
4.浏览器效果
5.点击导出
OK