文件下载、excel导出、支持中文
导出excel、下载文件
流程：导出都是从服务器下载文件，数据库中的数据查询出来 生成文件放到服务器上，再下载。下载之后可以根据需要自行删除或保留。
一、数据库查询出的数据导出excel
1.List<Map> 形式的数据
1.1生成excel的工具类
import java.util.List;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/****
* List<Map<String, Object>> 形式的数据 生成excel
* CellStyle 为设置每个类型数据的样式
* 内容设置里面的value 为得到数据类型，可根据需要补充
* else 里面为excel的类型数据。可根据需要补充
* 建议：避免输入输出格式有误，建议全部用String格式走
*
* @author tablemiao
*
*/
public class CreateMapExcel {
private static Logger logger = LoggerFactory.getLogger(CreateMapExcel.class);
/**
* @param
* datas 数据
* @param
* props 参数设置
* @param
* sheetName 单元格名称
*
* */
public static SXSSFWorkbook create(List<Map<String, Object>> datas,
List<PropSetter> props, String sheetName) {
long startTime = System.currentTimeMillis();
SXSSFWorkbook workbook = new SXSSFWorkbook();
Sheet sheet = workbook.createSheet();
workbook.setSheetName(0, sheetName);
Font titleFont = workbook.createFont();
titleFont.setFontName("微软雅黑");
titleFont.setFontHeightInPoints((short) 10); // 字体大小
titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);// 加粗
Font contentFont = workbook.createFont();
contentFont.setFontName("微软雅黑");
contentFont.setFontHeightInPoints((short) 9);
DataFormat format = workbook.createDataFormat();
CellStyle titleStyle = workbook.createCellStyle();
titleStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直
titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平
titleStyle.setBorderBottom(CellStyle.BORDER_THIN);
titleStyle.setBorderLeft(CellStyle.BORDER_THIN);
titleStyle.setBorderRight(CellStyle.BORDER_THIN);
titleStyle.setBorderTop(CellStyle.BORDER_THIN);
titleStyle.setFillForegroundColor(HSSFColor.LIGHT_GREEN.index);// 填暗红色
titleStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
titleStyle.setFont(titleFont);
titleStyle.setWrapText(true);
CellStyle stringStyle = workbook.createCellStyle();
stringStyle.setAlignment(CellStyle.ALIGN_LEFT);
stringStyle.setBorderBottom(CellStyle.BORDER_THIN);
stringStyle.setBorderLeft(CellStyle.BORDER_THIN);
stringStyle.setBorderRight(CellStyle.BORDER_THIN);
stringStyle.setBorderTop(CellStyle.BORDER_THIN);
stringStyle.setFont(contentFont);
stringStyle.setWrapText(true);
CellStyle longStyle = workbook.createCellStyle();
longStyle.setAlignment(CellStyle.ALIGN_LEFT);
longStyle.setBorderBottom(CellStyle.BORDER_THIN);
longStyle.setBorderLeft(CellStyle.BORDER_THIN);
longStyle.setBorderRight(CellStyle.BORDER_THIN);
longStyle.setBorderTop(CellStyle.BORDER_THIN);
longStyle.setFont(contentFont);
longStyle.setDataFormat(format.getFormat("0"));
longStyle.setWrapText(true);
CellStyle doubleStyle = workbook.createCellStyle();
doubleStyle.setAlignment(CellStyle.ALIGN_LEFT);
doubleStyle.setBorderBottom(CellStyle.BORDER_THIN);
doubleStyle.setBorderLeft(CellStyle.BORDER_THIN);
doubleStyle.setBorderRight(CellStyle.BORDER_THIN);
doubleStyle.setBorderTop(CellStyle.BORDER_THIN);
doubleStyle.setFont(contentFont);
doubleStyle.setDataFormat(format.getFormat("0.00"));
doubleStyle.setWrapText(true);
Row rowOne = sheet.createRow(0);
rowOne.setHeight((short) 350);
Cell cell;
for (int i = 0; i < props.size(); i++) {// 标题的设置
cell = rowOne.createCell(i);
sheet.setColumnWidth(i, props.get(i).getWidth()); // 宽度
cell.setCellStyle(titleStyle);
cell.setCellValue(props.get(i).getrOne()); // 标题
}
// 内容设置
Row row;
if (datas.size() != 0) {
for (int m = 0; m < datas.size(); m++) {
row = sheet.createRow(m + 1);
row.setHeight((short) 310);
for (int i = 0; i < props.size(); i++) {
Cell cont = row.createCell(i);
Object value = datas.get(m).get(props.get(i).getProp());
if (value == null) {
cont.setCellValue("");
cont.setCellStyle(stringStyle);
}else{
try{
cont.setCellType(HSSFCell.CELL_TYPE_STRING);
cont.setCellValue(Long.valueOf(String.valueOf(value)));
cont.setCellStyle(longStyle);
}catch(Exception e){
try{
cont.setCellType(HSSFCell.CELL_TYPE_STRING);
cont.setCellValue((Double.valueOf(String.valueOf(value))));
cont.setCellStyle(doubleStyle);
}catch(Exception e1){
cont.setCellType(HSSFCell.CELL_TYPE_STRING);
cont.setCellValue(String.valueOf(value));
cont.setCellStyle(stringStyle);
}
}
}
}
}
}
logger.info("导出总计耗时: {}", System.currentTimeMillis() - startTime + "毫秒!");
return workbook;
}
}
1.2 组成excel数据的实体
/***
* 组成list数据的实体
*
* @author tablemiao
*
*/
public class PropSetter {
private String rOne;
private String rTwo;
private String prop;
private String type;
private int width;
private boolean color;
/**** get、set 方法省略 ******/
public PropSetter(String rOne, String rTwo, String prop, int width) {
super();
this.rOne = rOne;
this.rTwo = rTwo;
this.prop = prop;
this.width = width;
}
public PropSetter(String rOne, String rTwo, String prop, int width,
boolean color) {
super();
this.rOne = rOne;
this.rTwo = rTwo;
this.prop = prop;
this.width = width;
this.color = color;
}
public PropSetter(String rOne, String rTwo, String prop, String type,
int width) {
super();
this.rOne = rOne;
this.rTwo = rTwo;
this.prop = prop;
this.type = type;
this.width = width;
}
public PropSetter() {
super();
}
}
1.3 数据库的数据填充的excel里
/***
* map数据 直接 导出
* @param param dao层参数,这里直接测试 不通过dao
* @param realFile 导出的生成文件名，用来下载
* @throws IOException
*/
public void exportToMap(Map<String, String> param, String realFile) throws IOException{
// param 为dao成过来的参数，可利用dao层查询数据库 得到一个需要导出的List<Map>数据
//此处自定义这样的数据 导出测试，根据实际查询数据库即可
List<Map<String, Object>> datas = new ArrayList<Map<String,Object>>();
Map<String, Object> map = null;
map = new HashMap<String, Object>();
map.put("customersNum", "2101087118");
map.put("customersName", "上海习正金融信息服务有限公司");
map.put("logo", "CL-BQ-A-NULL-218840-ZB");
datas.add(map);
map = new HashMap<String, Object>();
map.put("customersNum", "2100309828");
map.put("customersName", "苏州银行股份有限公司");
map.put("logo", "CL-XB-A-NULL-1211-0072");
datas.add(map);
map = new HashMap<String, Object>();
map.put("customersNum", "2100311056");
map.put("customersName", "中国移动国际有限公司");
map.put("logo", "CL-JK-I-NULL-218446-XB");
datas.add(map);
//构造一个excel,每一行即为一个PropSetter
//第一列为导出的excel的列名、第三列为map数据的key,大小写必须一致，第五列为excel每一格的宽度，具体可以在1.2的类里面自定义
List<PropSetter> props = new ArrayList<PropSetter>();
props.add(new PropSetter("集团编号qqqqq", null, "customersNum", null, 4000));
props.add(new PropSetter("集团名称", null, "customersName", null, 6000));
props.add(new PropSetter("专线编号", null, "logo", null, 6000));
//调用1.1中的生成方法 生成excel
OutputStream outputStream = new FileOutputStream(realFile);
SXSSFWorkbook workbook = CreateMapExcel.create(datas, props,"ExcelToMap测试");
workbook.write(outputStream);
logger.info("ExcelToMap 测试 导出成功");
outputStream.flush();
outputStream.close();
}
1.4 servlet导出生成1.3生成的excel，下载文件也是如此
组装下载地址
private final FastDateFormat dayFormat = FastDateFormat.getInstance("yyyyMMdd^yyyyMMddHHmmss^");
public String exportToMap() throws Exception {
String fileName = "export" + File.separator + "Map数据直接导出测试_"
+ dayFormat.format(System.currentTimeMillis()) + ".xlsx";
//获取服务器地址加文件名字，即文件存放的位置
String realFile = webPath + File.separator + fileName;
fileOperate(realFile);//上传方法里的判断文件是否存在，根据需要删除
exportExcel.exportToMap(new HashMap<String, String>(),realFile);
return fileName;
}
private void fileOperate(String realFile) {
File file = new File(realFile);
if(file.exists()) {
logger.info("文件已经存在, 执行文件删除操作");
file.delete();
logger.info("删除已经存在的文件, 文件名称: {}", realFile);
}
}
1.5 暴露接口，通过一串地址在浏览器地址栏中输入下载服务器相应文件
@GET
@Path("/export")
@Produces("text/plain;charset=UTF-8")
public String exportExcel() throws Exception {
String fileName = servletUpload.exportToMap();
logger.info("ExcelToMap导出 成功 FileName : {} ", fileName);
String tmp = getUrlCode(fileName);
logger.info("组装后的文件名称: {}", tmp);
return tmp;
}
protected String getUrlCode(String fileName)
throws UnsupportedEncodingException {
String tmp = fileName.replace("export/", "");
String[] fs = tmp.split("\\^");
tmp = fs[0] + fs[2];
tmp = "servletExportUtil/" + URLEncoder.encode(tmp, "utf-8") + "?timeId=" + fs[1];
return tmp;
}
1.6 servlet 拦截地址下载文件
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLDecoder;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ServletExportUtil extends HttpServlet {
protected final Logger logger = LoggerFactory.getLogger(this.getClass());
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String url = request.getRequestURI();
String timeId = request.getParameter("timeId");
String fileNameDecode = url.substring(url.lastIndexOf('/') + 1);
logger.info("timeId: {}", timeId);
fileNameDecode = URLDecoder.decode(fileNameDecode, "utf-8");
String[] fs = fileNameDecode.split("\\.");
String realFileName = fs[0] + "^" + timeId + "^." + fs[1];
// fileNameDecode = fs[0] + fs[2];
logger.info("转义后的文件名称: {}, {}", fileNameDecode);
String savepath = getInitParameter("FilePath");
logger.info("文件保存的路径: {}", savepath);
logger.info("文件绝对路径: {}", savepath + File.separator + realFileName);
File file = new File(savepath + File.separator + realFileName);
if (!file.exists()) {
throw new RuntimeException("文件不存在");
} else {
InputStream in = new FileInputStream(file);
// 设置响应类型
response.setContentType("application/force-download");
response.setHeader("Content-Disposition", "attachment;filename="
+ new String(fileNameDecode.getBytes("utf-8"), "ISO-8859-1"));
// 把本地文件发送给客户端
OutputStream out = response.getOutputStream();
int len = 0;
byte[] bs = new byte[in.available()];
while ((len = in.read(bs)) != -1) {
out.write(bs, 0, len);
}
in.close();
out.flush();
out.close();
}
}
}
1.7 web.xml 配置servlet 即 webpath的 服务器路径（这个路径亦可以写死在代码里）
<servlet> <servlet-name>ServletExportUtil</servlet-name> <servlet-class>com.eastcom.linksight.ws.webservices.ext.ServletExportUtil</servlet-class> <init-param> <param-name>FilePath</param-name> <param-value>/home/table/tomcat-res1/webapps/shjkws/export</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>ServletExportUtil</servlet-name> <url-pattern>/servletExportUtil/*</url-pattern> </servlet-mapping> <!-- class 对应相应webpath定义的类，value 就是初始化给的值，即服务器路径 --> <bean class="com.eastcom.linksight.ws.elapse.service.impl.ElapseNoticeServiceImpl"> <property value="/home/table/tomcat-res1/webapps/shjkws" name="webPath"/> </bean>
总结流程：
1.客户端调用导出接口拿到一个地址放在服务器请求
eg:http://10.221.xx.xx:8080/table/servletExportUtil/%E7%BB%9F%E8%AE%A1%E5%88%86%E6%9E%90.xlsx?timeId=20150430165132 以servletExportUtil为分割 前面一节为服务器地址，后面一节为export接口生成的地址，详见1.4和1.5
拿到1.4中的filename通过1.5中getUriCode方法转码拼接之后就得到了。
2.该请求地址被servlet拦截（web.xml有配置），进入1.6解析，找到服务器中对应的文件 通过流方式 生成文件到客户端
二 List<bean> 方式的数据处理，下载方式完全，生成文件到服务器有点差异。
2.1生成excel的模板
package com.eastcom.linksight.ws.elapse.export;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.Date;
import java.util.List;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.CollectionUtils;
public class CreateExcel<Record> {
private Logger logger = LoggerFactory.getLogger(getClass());
public SXSSFWorkbook create(List<CellSetter> cellSetters,
List<Record> records, String sheetName) {
long xl = System.currentTimeMillis();
CellSetter cellSetter;
Cell cell;
SXSSFWorkbook workbook = new SXSSFWorkbook();
DataFormat format = workbook.createDataFormat();
Method getMethod = null;
try {
int cols = cellSetters.size();
int rows = records.size();
Font titleFont = workbook.createFont();
titleFont.setFontName("微软雅黑");
titleFont.setFontHeightInPoints((short) 10); // 字体大小
titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);// 加粗
Font contentFont = workbook.createFont();
contentFont.setFontName("微软雅黑");
contentFont.setFontHeightInPoints((short) 8);
CellStyle titleStyle = workbook.createCellStyle();
CellStyle longStyle = workbook.createCellStyle();
CellStyle stringStyle = workbook.createCellStyle();
CellStyle dateStyle = workbook.createCellStyle();
CellStyle booleanStyle = workbook.createCellStyle();
CellStyle doubleStyle = workbook.createCellStyle();
titleStyle.setAlignment(CellStyle.ALIGN_CENTER);
titleStyle.setBorderBottom(CellStyle.BORDER_THIN);
titleStyle.setBorderLeft(CellStyle.BORDER_THIN);
titleStyle.setBorderRight(CellStyle.BORDER_THIN);
titleStyle.setBorderTop(CellStyle.BORDER_THIN);
titleStyle.setFillForegroundColor(HSSFColor.LIGHT_GREEN.index);// 填暗红色
titleStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
titleStyle.setFont(titleFont);
titleStyle.setWrapText(true);
longStyle.setAlignment(CellStyle.ALIGN_LEFT);
longStyle.setBorderBottom(CellStyle.BORDER_THIN);
longStyle.setBorderLeft(CellStyle.BORDER_THIN);
longStyle.setBorderRight(CellStyle.BORDER_THIN);
longStyle.setBorderTop(CellStyle.BORDER_THIN);
longStyle.setFont(contentFont);
longStyle.setWrapText(true);
doubleStyle.setAlignment(CellStyle.ALIGN_LEFT);
doubleStyle.setBorderBottom(CellStyle.BORDER_THIN);
doubleStyle.setBorderLeft(CellStyle.BORDER_THIN);
doubleStyle.setBorderRight(CellStyle.BORDER_THIN);
doubleStyle.setBorderTop(CellStyle.BORDER_THIN);
doubleStyle.setFont(contentFont);
doubleStyle.setWrapText(true);
stringStyle.setAlignment(CellStyle.ALIGN_LEFT);
stringStyle.setBorderBottom(CellStyle.BORDER_THIN);
stringStyle.setBorderLeft(CellStyle.BORDER_THIN);
stringStyle.setBorderRight(CellStyle.BORDER_THIN);
stringStyle.setBorderTop(CellStyle.BORDER_THIN);
stringStyle.setFont(contentFont);
stringStyle.setWrapText(true);
dateStyle.setAlignment(CellStyle.ALIGN_LEFT);
dateStyle.setBorderBottom(CellStyle.BORDER_THIN);
dateStyle.setBorderLeft(CellStyle.BORDER_THIN);
dateStyle.setBorderRight(CellStyle.BORDER_THIN);
dateStyle.setBorderTop(CellStyle.BORDER_THIN);
dateStyle.setFont(contentFont);
dateStyle.setWrapText(true);
booleanStyle.setAlignment(CellStyle.ALIGN_LEFT);
booleanStyle.setBorderBottom(CellStyle.BORDER_THIN);
booleanStyle.setBorderLeft(CellStyle.BORDER_THIN);
booleanStyle.setBorderRight(CellStyle.BORDER_THIN);
booleanStyle.setBorderTop(CellStyle.BORDER_THIN);
booleanStyle.setFont(contentFont);
booleanStyle.setWrapText(true);
Sheet sheet = workbook.createSheet();
workbook.setSheetName(0, sheetName);
Row row = sheet.createRow(0);
// Drawing draw = sheet.createDrawingPatriarch();
Class<Record> clz = null;
Method[] methods = new Method[cols];
if (!CollectionUtils.isEmpty(records)) {
clz = (Class<Record>) records.get(0).getClass();
}
// 设置标题
for (int i = 0; i < cols; i++) {
cell = row.createCell(i);
cellSetter = cellSetters.get(i);
cell.setCellValue(cellSetter.getTitle().trim());
cell.setCellStyle(titleStyle);
// if (cellSetters.get(i) != null) {
// Comment comment = draw
// .createCellComment(new XSSFClientAnchor(0, 0, 0, 0,
// cell.getColumnIndex(), row.getRowNum(),
// cell.getColumnIndex() + 1,
// row.getRowNum() + 2));
// comment.setString(new XSSFRichTextString(cellSetter
// .getTitle()));
// cell.setCellComment(comment);
// }
if (clz != null) {
PropertyDescriptor pd = new PropertyDescriptor(
cellSetter.getProperty(), clz);
methods[i] = pd.getReadMethod();
}
}
// 这是内容
for (int i = 0; i < rows; i++) {
row = sheet.createRow(i + 1);
row.setHeight((short) 300);
if ((i + 1) % 10000 == 0)
logger.info("存了一万条记录 {}");
for (int j = 0; j < cols; j++) {
cellSetter = cellSetters.get(j);
cell = row.createCell(j);
Record record = records.get(i);
getMethod = methods[j];
if (getMethod.invoke(record) == null) {
cell.setCellStyle(stringStyle);
continue;
}
if (cellSetter.getRender() != null) {
cell.setCellType(Cell.CELL_TYPE_STRING);
cell.setCellStyle(stringStyle);
cell.setCellValue(cellSetter.getRender().view(
getMethod.invoke(record)));
// Comment comment = draw
// .createCellComment(new XSSFClientAnchor(0, 0,
// 0, 0, cell.getColumnIndex(), row
// .getRowNum(), cell
// .getColumnIndex() + 1, row
// .getRowNum() + 2));
// comment.setString(new XSSFRichTextString(cellSetter
// .getRender().view(getMethod.invoke(record))));
// cell.setCellComment(comment);
continue;
}
if (cellSetter.getType().trim().toLowerCase()
.equals("long")
|| cellSetter.getType().trim().toLowerCase()
.equals("int")
|| cellSetter.getType().trim().toLowerCase()
.equals("byte")
|| cellSetter.getType().trim().toLowerCase()
.equals("short")) {
cell.setCellType(Cell.CELL_TYPE_NUMERIC);
longStyle.setDataFormat(format.getFormat(cellSetter
.getFormat()));
cell.setCellValue(Long.parseLong(getMethod.invoke(
record).toString()));
// Comment comment = draw
// .createCellComment(new XSSFClientAnchor(0, 0,
// 0, 0, cell.getColumnIndex(), row
// .getRowNum(), cell
// .getColumnIndex() + 1, row
// .getRowNum() + 2));
// comment.setString(new XSSFRichTextString(getMethod
// .invoke(record).toString()));
// cell.setCellComment(comment);
cell.setCellStyle(longStyle);
continue;
}
if (cellSetter.getType().trim().toLowerCase()
.equals("double")
|| cellSetter.getType().trim().toLowerCase()
.equals("float")) {
cell.setCellType(Cell.CELL_TYPE_NUMERIC);
doubleStyle.setDataFormat(format.getFormat(cellSetter
.getFormat()));
cell.setCellValue(Double.parseDouble(getMethod.invoke(
record).toString()));
// Comment comment = draw
// .createCellComment(new XSSFClientAnchor(0, 0,
// 0, 0, cell.getColumnIndex(), row
// .getRowNum(), cell
// .getColumnIndex() + 1, row
// .getRowNum() + 2));
// comment.setString(new XSSFRichTextString(getMethod
// .invoke(record).toString()));
// cell.setCellComment(comment);
cell.setCellStyle(doubleStyle);
continue;
}
if (cellSetter.getType().trim().toLowerCase()
.equals("date")) {
cell.setCellType(Cell.CELL_TYPE_NUMERIC);
dateStyle.setDataFormat(format.getFormat(cellSetter
.getFormat()));
cell.setCellValue((Date) getMethod.invoke(record));
cell.setCellStyle(dateStyle);
// Comment comment = draw
// .createCellComment(new XSSFClientAnchor(0, 0,
// 0, 0, cell.getColumnIndex(), row
// .getRowNum(), cell
// .getColumnIndex() + 1, row
// .getRowNum() + 2));
// comment.setString(new XSSFRichTextString(getMethod
// .invoke(record).toString()));
// cell.setCellComment(comment);
continue;
}
if (cellSetter.getType().trim().toLowerCase()
.equals("string")
|| cellSetter.getType().trim().toLowerCase()
.equals("char")) {
cell.setCellType(Cell.CELL_TYPE_STRING);
try {
cell.setCellValue(Integer.parseInt(getMethod
.invoke(record).toString()));
cell.setCellStyle(longStyle);
} catch (Exception e) {
try {
cell.setCellValue(Double.parseDouble(getMethod
.invoke(record).toString()));
cell.setCellStyle(doubleStyle);
} catch (Exception e1) {
cell.setCellStyle(stringStyle);
cell.setCellValue(getMethod.invoke(record)
.toString());
}
}
// Comment comment = draw
// .createCellComment(new XSSFClientAnchor(0, 0,
// 0, 0, cell.getColumnIndex(), row
// .getRowNum(), cell
// .getColumnIndex() + 1, row
// .getRowNum() + 2));
// comment.setString(new XSSFRichTextString(getMethod
// .invoke(record).toString()));
// cell.setCellComment(comment);
continue;
}
if (cellSetter.getType().trim().toLowerCase()
.equals("boolean")) {
cell.setCellType(Cell.CELL_TYPE_BOOLEAN);
booleanStyle.setDataFormat(format.getFormat(cellSetter
.getFormat()));
cell.setCellStyle(booleanStyle);
cell.setCellValue((Boolean) getMethod.invoke(record));
// Comment comment = draw
// .createCellComment(new XSSFClientAnchor(0, 0,
// 0, 0, cell.getColumnIndex(), row
// .getRowNum(), cell
// .getColumnIndex() + 1, row
// .getRowNum() + 2));
// comment.setString(new XSSFRichTextString(getMethod
// .invoke(record).toString()));
// cell.setCellComment(comment);
continue;
}
}
}
// 给每行设置单元格长度
for (int i = 0; i < cellSetters.size(); i++) {
cellSetter = cellSetters.get(i);
sheet.setColumnWidth(i, cellSetter.getCellColumnWidth());
}
logger.info("总耗时 {} ", System.currentTimeMillis() - xl);
return workbook;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
2.2构造组成excel数据的实体
/***
* 该类 可根据具体需求设定
*
**/
public class CellSetter {
private String title;
private String property;
private String type;
private String format;
private int cellColumnWidth;
private ExeclColRnderer render;
/**** 省略 get、set *****/
public CellSetter(String title, String property, String type, String format, int cellColumnWidth) {
super();
this.title = title;
this.property = property;
this.type = type;
this.format = format;
this.cellColumnWidth = cellColumnWidth;
}
public CellSetter(String title, String property, String type, String format, int cellColumnWidth, ExeclColRnderer render) {
super();
this.title = title;
this.property = property;
this.type = type;
this.format = format;
this.cellColumnWidth = cellColumnWidth;
this.render = render;
}
public CellSetter() {
}
}
interface ExeclColRnderer{
String view(Object o);
}
2.3 数据库的数据填充的excel里
/***
* 统计分析_kpi指标_售中kpi指标_售中kpi维护
*
* @param data ws层直接传过来的数据
* @throws Exception
*/
public void createKpiIndexSZ(List<KpiIndexSZ> data,String realFile) throws Exception{
CreateExcel<KpiIndexSZ> createExcel = new CreateExcel<KpiIndexSZ>();
logger.info("开始导出 统计分析_kpi指标_售中kpi指标_售中kpi维护 数据");
// CellSetter 第一列为 excel中的头、第二列为实体对应的字段、第三列为数据的类型、第4列为excel的类型、5列为宽度
List<CellSetter> cellSetter = new ArrayList<CellSetter>();
cellSetter.add(new CellSetter("月份", "saveDate", "String", "G/通用格式", 6000));
cellSetter.add(new CellSetter("属地分公司", "dependency", "String", "G/通用格式", 6000));
cellSetter.add(new CellSetter("售中开通及时率(%)", "ratio", "String", "G/通用格式", 6000));
OutputStream outputStream = new FileOutputStream(realFile);
SXSSFWorkbook workbook = createExcel.create(cellSetter, data,"售中kpi维护");
workbook.write(outputStream);
logger.info("统计分析_kpi指标_售中kpi指标 数据导出成功");
outputStream.flush();
outputStream.close();
}
其余下载为List<Map> 一致
三、复杂表头的数据导出
下载方式与上述一致，只是构造excel的模板不同，跨列和跨行其实就算坐标。合并坐标。
比如：要导出这样的格式（客户信息跨两列，专线编号跨两行）
导出excel复杂表头模板类
import java.util.List;
import java.util.Map;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class CreateTwoMapExcel {
private static Logger logger = LoggerFactory.getLogger(CreateMapExcel.class);
/**
* @param
* datas 数据
* @param
* props 参数设置
* @param
* fps 合并单元格坐标值
* @param
* sheetName 单元格名称
*
* */
public static SXSSFWorkbook create(List<Map<String, Object>> datas,
List<PropSetter> props, List<FourPoint> fps, String sheetName) {
long startTime = System.currentTimeMillis();
SXSSFWorkbook workbook = new SXSSFWorkbook();
Sheet sheet = workbook.createSheet();
workbook.setSheetName(0, sheetName);
Font titleFont = workbook.createFont();
titleFont.setFontName("微软雅黑");
titleFont.setFontHeightInPoints((short) 10); // 字体大小
titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);// 加粗
Font contentFont = workbook.createFont();
contentFont.setFontName("微软雅黑");
contentFont.setFontHeightInPoints((short) 9);
CellStyle titleStyle = workbook.createCellStyle();
titleStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直
titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平
titleStyle.setBorderBottom(CellStyle.BORDER_THIN);
titleStyle.setBorderLeft(CellStyle.BORDER_THIN);
titleStyle.setBorderRight(CellStyle.BORDER_THIN);
titleStyle.setBorderTop(CellStyle.BORDER_THIN);
titleStyle.setFillForegroundColor(HSSFColor.LIGHT_GREEN.index);// 填暗红色
titleStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
titleStyle.setFont(titleFont);
titleStyle.setWrapText(true);
CellStyle stringStyle = workbook.createCellStyle();
stringStyle.setAlignment(CellStyle.ALIGN_LEFT);
stringStyle.setBorderBottom(CellStyle.BORDER_THIN);
stringStyle.setBorderLeft(CellStyle.BORDER_THIN);
stringStyle.setBorderRight(CellStyle.BORDER_THIN);
stringStyle.setBorderTop(CellStyle.BORDER_THIN);
stringStyle.setFont(contentFont);
stringStyle.setWrapText(true);
Row rowOne = sheet.createRow(0);
rowOne.setHeight((short) 350);
Row rowTwo = sheet.createRow(1);
Cell cell;
for(int i=0; i<props.size(); i++) {
cell = rowOne.createCell(i);// 一级标题的设置
cell.setCellStyle(titleStyle);
cell.setCellValue(props.get(i).getrOne());
cell = rowTwo.createCell(i);// 二级标题的设置
cell.setCellStyle(titleStyle);
cell.setCellValue(props.get(i).getrTwo());
sheet.setColumnWidth(i, props.get(i).getWidth()); // 宽度
}
for(FourPoint fp : fps) {// 合并单元格
sheet.addMergedRegion(new CellRangeAddress(fp.getRowStart(), fp.getRowEnd(),
fp.getColStart(), fp.getColEnd()));
}
// 内容设置
Row row;
if (datas.size() != 0) {
for (int m = 0; m < datas.size(); m++) {
row = sheet.createRow(m + 2);
row.setHeight((short) 310);
for (int i = 0; i < props.size(); i++) {
Cell cont = row.createCell(i);
Object value = datas.get(m).get(props.get(i).getProp());
if (value == null) {
cont.setCellValue("");
// cont.setCellType(HSSFCell.CELL_TYPE_STRING);
cont.setCellStyle(stringStyle);
} else {
cont.setCellType(HSSFCell.CELL_TYPE_STRING);
cont.setCellValue(String.valueOf(value));
cont.setCellStyle(stringStyle);
}
}
}
}
logger.info("导出总计耗时: {}", System.currentTimeMillis() - startTime + "毫秒!");
return workbook;
}
}
3.2构造导出实体
package com.tm.util;
/***
* 组成list数据的实体
*
* @author tablemiao
*
*/
public class PropSetter {
private String rOne; //第一行标题
private String rTwo; //第二行标题
private String prop;//对应的导出数据的字段名
private String type;//数据类型
private int width;//表格宽度
private boolean color;//颜色
/****** Getter Setter 省略*****/
public PropSetter(String rOne, String rTwo, String prop, int width) {
super();
this.rOne = rOne;
this.rTwo = rTwo;
this.prop = prop;
this.width = width;
}
public PropSetter(String rOne, String rTwo, String prop, int width,
boolean color) {
super();
this.rOne = rOne;
this.rTwo = rTwo;
this.prop = prop;
this.width = width;
this.color = color;
}
public PropSetter(String rOne, String rTwo, String prop, String type,
int width) {
super();
this.rOne = rOne;
this.rTwo = rTwo;
this.prop = prop;
this.type = type;
this.width = width;
}
public PropSetter() {
super();
}
}
3.3 填充数据并导出（此处简单起见，就直接导出测试，以单元测试的方式呈现，也可向上诉一样封装接口）
@Test
public void testMapExport1() throws Exception {
List<Map<String, Object>> datas = new ArrayList<Map<String,Object>>();
Map<String, Object> map = null;
map = new HashMap<String, Object>();
map.put("customersNum", "2101087118");
map.put("customersName", "上海习正金融信息服务有限公司");
map.put("logo", "CL-BQ-A-NULL-218840-ZB");
datas.add(map);
map = new HashMap<String, Object>();
map.put("customersNum", "2100309828");
map.put("customersName", "苏州银行股份有限公司");
map.put("logo", "CL-XB-A-NULL-1211-0072");
datas.add(map);
map = new HashMap<String, Object>();
map.put("customersNum", "2100311056");
map.put("customersName", "中国移动国际有限公司");
map.put("logo", "CL-JK-I-NULL-218446-XB");
datas.add(map);
List<PropSetter> props = new ArrayList<PropSetter>();
props.add(new PropSetter("客户信息", "客户名称", "customersName", 4000));
props.add(new PropSetter("", "客户编号", "customersNum", 4000));
props.add(new PropSetter("专线编号", "", "logo", 4000));
List<FourPoint> fps = new ArrayList<FourPoint>();
//合并A,B列，坐标从0开始（客户信息这一栏为第一行所以是（0,0）纵左边跨AB所以是（0,1））
fps.add(new FourPoint(0, 0, 0, 1));
//合并1,2行，坐标从0开始（专线编号这一栏为1,2行所以是（0,1）纵左边为C列所以是（2,2））
fps.add(new FourPoint(0, 1, 2, 2));
OutputStream outputStream = new FileOutputStream("Z:/复杂表头导出.xlsx");
SXSSFWorkbook workbook = CreateTwoMapExcel.create(datas, props, fps,
"跨行跨列导出测试");
workbook.write(outputStream);
outputStream.flush();
outputStream.close();
}