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加入非poi的excel导出，导出数据类型灵活（得益于jdk8+的 BiFuntion使用）

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lxyer 2018-07-06 10:53:42 +08:00
parent aaa80c9678
commit f7b0fb28b5
7 changed files with 727 additions and 217 deletions
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.gitignore vendored Normal file
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/target/
.project
.classpath
/.settings/
/.externalToolBuilders/
/bin/
*.iml
.idea/
/.idea/
/out/
*.zip
/tmp/
*.swp
~$*

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README.md Normal file
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# ExcelUtil
### 功能
1. poi的导入导出 支持多sheet导出,详见代码 ExcelKit
2. 非poi导出，导出数据量理论无上限；导出数据类型不限制List<T>(JDK8+),
如果是jdk7及以下版本，未做支持（需要修改部分代码）

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pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.lxyer</groupId>
<artifactId>jdk-demo</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<testSourceDirectory>test</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>servlet-api</artifactId>
<version>6.0.37</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>

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ExcelUtil.java → src/excel/poi/ExcelKit.java
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import java.io.IOException; package excel.poi;
import java.io.OutputStream;
import java.lang.reflect.Field; import org.apache.poi.hssf.usermodel.HSSFCell;
import java.text.SimpleDateFormat; import org.apache.poi.hssf.usermodel.HSSFRow;
import java.util.Calendar; import org.apache.poi.hssf.usermodel.HSSFSheet;
import java.util.Date; import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import java.util.List; import org.apache.poi.poifs.filesystem.OfficeXmlFileException;
import java.util.Map; import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import javax.servlet.http.HttpServletRequest; import org.apache.poi.ss.usermodel.Sheet;
import javax.servlet.http.HttpServletResponse; import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.ss.usermodel.Row; import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook; import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/** import java.io.*;
* 使用poi报表导出工具类 import java.lang.reflect.Field;
* 把poi的一个调用接口抽出来，便于导出功能的管理 import java.text.SimpleDateFormat;
* @author LiangXianYou lxy208@126.com import java.util.*;
* @param
* /**
*/ * 使用poi报表导出工具类
public class ExcelUtil { * 把poi的一个调用接口抽出来，便于导出功能的管理
* @author LiangXianYou lxy208@126.com
/** * @param
* <b>导出list中map做载体的数据到excel</b><br> *
* 参数说明：<br> */
* list:存放了Map数据的集合<br> public class ExcelKit {
* hdNames:表头列名<br>
* hds:对应表头的数据KEY<br> /**
* xlsName:导出文件名<br> * <b>导出list中map做载体的数据到excel</b><br>
* @author LiangXianYou * 参数说明：<br>
* @date 2015-6-25 上午10:22:51 * list:存放了Map数据的集合<br>
*/ * hdNames:表头列名<br>
public static <T> boolean outPutExcelByMap(List<Map<String, Object>> list, String[] hdNames, String[] hds, String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{ * hds:对应表头的数据KEY<br>
* xlsName:导出文件名<br>
Workbook wb = new HSSFWorkbook(); //创建工作薄 * @author LiangXianYou
Sheet sheet = wb.createSheet(); //创建工作表 * @date 2015-6-25 上午10:22:51
sheet.autoSizeColumn(( short ) 0 ); //自适应宽度 */
//写入表头---Excel的第一行数据 public static <T> boolean exportByMap(List<Map<String, Object>> list, String[] hdNames, String[] hds, String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
Row nRow = sheet.createRow(0); //创建行
for(int i=0;i<hdNames.length;i++){ Workbook wb = new XSSFWorkbook(); //创建工作薄
Cell nCell = nRow.createCell(i); //创建单元格 Sheet sheet = wb.createSheet(); //创建工作表
nCell.setCellValue(hdNames[i]); sheet.autoSizeColumn(( short ) 0 ); //自适应宽度
} //写入表头---Excel的第一行数据
Row nRow = sheet.createRow(0); //创建行
//写入每一行数据---一条记录就是一行数据 for(int i=0;i<hdNames.length;i++){
for(int i=0;i<list.size();i++){ Cell nCell = nRow.createCell(i); //创建单元格
for(int j=0;j<hds.length;j++){ nCell.setCellValue(hdNames[i]);
Object o = list.get(i).get(hds[j]); //得到列的值 }
data2Excel(sheet, o, i+1, j); //将值写入Excel
} //写入每一行数据---一条记录就是一行数据
} for(int i=0;i<list.size();i++){
return downloadExcel(wb, xlsName, request, response); for(int j=0;j<hds.length;j++){
} Object o = list.get(i).get(hds[j]); //得到列的值
data2Excel(sheet, o, i+1, j); //将值写入Excel
/** }
* Excels导出多个sheet }
* @author LiangXianYou return downloadExcel(wb, xlsName, request, response);
* @date 2015-6-16 下午5:56:56 }
*/
//map:data,sheetName,hds,hdNames,xlsName;request,response /**
public static <T> boolean outPutExcels(List<Map<String, Object>> list,String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{ * Excels导出多个sheet
* @author LiangXianYou
Workbook wb = new HSSFWorkbook(); //创建工作薄 * @date 2015-6-16 下午5:56:56
for(int i=0;i<list.size();i++){ */
Map<String, Object> map = list.get(i); //map:data,sheetName,hds,hdNames,xlsName;request,response
Sheet sheet = wb.createSheet(); //创建工作表 public static <T> boolean exportExcels(List<Map<String, Object>> list,String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
String sheetName = (String) map.get("sheetName");
wb.setSheetName(i, sheetName); Workbook wb = new XSSFWorkbook(); //创建工作薄
//写入表头---Excel的第一行数据 for(int i=0;i<list.size();i++){
Row nRow = sheet.createRow(0); //创建行 Map<String, Object> map = list.get(i);
String[] hdNames = (String[]) map.get("hdNames"); Sheet sheet = wb.createSheet(); //创建工作表
for(int j=0;j<hdNames.length;j++){ String sheetName = (String) map.get("sheetName");
Cell nCell = nRow.createCell(j); //创建单元格 wb.setSheetName(i, sheetName);
nCell.setCellValue(hdNames[j]); //写入表头---Excel的第一行数据
} Row nRow = sheet.createRow(0); //创建行
String[] hdNames = (String[]) map.get("hdNames");
//写入每一行数据---一条记录就是一行数据 for(int j=0;j<hdNames.length;j++){
@SuppressWarnings("unchecked") Cell nCell = nRow.createCell(j); //创建单元格
List<T> data = (List<T>) map.get("data"); nCell.setCellValue(hdNames[j]);
String[] hds = (String[]) map.get("hds"); }
for(int j=0;j<data.size();j++){
for(int k=0;k<hds.length;k++){ //写入每一行数据---一条记录就是一行数据
Object o = getFieldValue(data.get(j), hds[k]); //得到列的值 @SuppressWarnings("unchecked")
data2Excel(sheet, o, j+1, k); //将值写入Excel List<T> data = (List<T>) map.get("data");
} String[] hds = (String[]) map.get("hds");
} for(int j=0;j<data.size();j++){
} for(int k=0;k<hds.length;k++){
Object o = getFieldValue(data.get(j), hds[k]); //得到列的值
return downloadExcel(wb, xlsName, request, response); data2Excel(sheet, o, j+1, k); //将值写入Excel
} }
}
/** }
* 参数说明：
* list：list数据集合 return downloadExcel(wb, xlsName, request, response);
* hdNames：表头需要显示的名称 }
* hds：表头对应的对象属性名称，和 hdNames一一对应
* xlsName：导出Excel的预定义名称 /**
* request: HttpServletRequest * 参数说明：
* response：HttpServletResponse * list：list数据集合
* 通过数据构建Excel * hdNames：表头需要显示的名称
* @author LiangXianYou * hds：表头对应的对象属性名称，和 hdNames一一对应
* @throws Exception * xlsName：导出Excel的预定义名称
* @date 2015-3-13 上午11:00:30 * request: HttpServletRequest
*/ * response：HttpServletResponse
public static <T> boolean outPutExcel(List<T> list, String[] hdNames, String[] hds, String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{ * 通过数据构建Excel
* @author LiangXianYou
Workbook wb = new HSSFWorkbook(); //创建工作薄 * @throws Exception
Sheet sheet = wb.createSheet(); //创建工作表 * @date 2015-3-13 上午11:00:30
sheet.autoSizeColumn(( short ) 0 ); //自适应宽度 */
//写入表头---Excel的第一行数据 public static <T> boolean exportExcel(List<T> list, String[] hdNames, String[] hds, String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
Row nRow = sheet.createRow(0); //创建行
for(int i=0;i<hdNames.length;i++){ Workbook wb = new XSSFWorkbook(); //创建工作薄
Cell nCell = nRow.createCell(i); //创建单元格 Sheet sheet = wb.createSheet(); //创建工作表
nCell.setCellValue(hdNames[i]); sheet.autoSizeColumn(( short ) 0 ); //自适应宽度
} //写入表头---Excel的第一行数据
Row nRow = sheet.createRow(0); //创建行
//写入每一行数据---一条记录就是一行数据 for(int i=0;i<hdNames.length;i++){
for(int i=0;i<list.size();i++){ Cell nCell = nRow.createCell(i); //创建单元格
for(int j=0;j<hds.length;j++){ nCell.setCellValue(hdNames[i]);
Object o = getFieldValue(list.get(i), hds[j]); //得到列的值 }
data2Excel(sheet, o, i+1, j); //将值写入Excel
} //写入每一行数据---一条记录就是一行数据
} for(int i=0;i<list.size();i++){
return downloadExcel(wb, xlsName, request, response); for(int j=0;j<hds.length;j++){
} Object o = getFieldValue(list.get(i), hds[j]); //得到列的值
data2Excel(sheet, o, i+1, j); //将值写入Excel
/** }
* 传递一个Wookbook，给定文件名，以及request和response下载Excel文档 }
* @author LiangXianYou return downloadExcel(wb, xlsName, request, response);
* @throws IOException }
* @date 2015-3-13 上午9:00:36
*/ /**
@SuppressWarnings("all") * 传递一个Wookbook，给定文件名，以及request和response下载Excel文档
private static boolean downloadExcel(Workbook wb, String xlsName, HttpServletRequest request, HttpServletResponse response) throws IOException{ * @author LiangXianYou
if(request.getHeader("user-agent").indexOf("MSIE") != -1) { * @throws IOException
xlsName = java.net.URLEncoder.encode(xlsName,"utf-8") + ".xls"; * @date 2015-3-13 上午9:00:36
} else { */
xlsName = new String(xlsName.getBytes("utf-8"),"iso-8859-1")+ ".xls"; @SuppressWarnings("all")
} private static boolean downloadExcel(Workbook wb, String xlsName, HttpServletRequest request, HttpServletResponse response) throws IOException{
OutputStream os = response.getOutputStream(); if(request.getHeader("user-agent").indexOf("MSIE") != -1) {
response.setContentType("application/vnd.ms-excel"); xlsName = java.net.URLEncoder.encode(xlsName,"utf-8") + ".xls";
response.setHeader("Content-disposition", "attachment;filename="+xlsName); } else {
xlsName = new String(xlsName.getBytes("utf-8"),"iso-8859-1")+ ".xls";
wb.write(os); }
return true; OutputStream os = response.getOutputStream();
} response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-disposition", "attachment;filename="+xlsName);
/**
* 通过泛型实例对象得到某一字段值 wb.write(os);
* @author LiangXianYou return true;
* @date 2015-3-13 上午10:53:32 }
*/
private static <T> Object getFieldValue(T t, String fieldName) throws Exception{ /**
if(t == null){ * 通过泛型实例对象得到某一字段值
return null; * @author LiangXianYou
} * @date 2015-3-13 上午10:53:32
Field field = t.getClass().getDeclaredField(fieldName); */
field.setAccessible(true);//暴力反射 private static <T> Object getFieldValue(T t, String fieldName) throws Exception{
Object o = field.get(t);//得到字段数据的值 if(t == null){
return o; return null;
} }
Field field = t.getClass().getDeclaredField(fieldName);
/** field.setAccessible(true);//暴力反射
* 将数据写到Excel中 Object o = field.get(t);//得到字段数据的值
* @author LiangXianYou return o;
* @date 2015-3-13 上午10:37:55 }
*/
private static void data2Excel(Sheet sheet, Object o, Integer r, Integer c){ /**
//通过获得sheet中的某一列，有得到，没有创建 * 将数据写到Excel中
Row nRow = sheet.getRow(r); * @author LiangXianYou
if(nRow == null){ * @date 2015-3-13 上午10:37:55
nRow = sheet.createRow(r); */
} private static void data2Excel(Sheet sheet, Object o, Integer r, Integer c){
// nRow.setColumnWidth(r, arg1); //通过获得sheet中的某一列，有得到，没有创建
Row nRow = sheet.getRow(r);
Cell nCell = nRow.createCell(c); if(nRow == null){
nRow = sheet.createRow(r);
}
//根据不同类型进行转化，如有其它类型没有考虑周全的，使用发现的时候添加 // nRow.setColumnWidth(r, arg1);
char type = 'x';
if(o instanceof Integer){ Cell nCell = nRow.createCell(c);
type = 1;
}else if(o instanceof Double){
type = 2; //根据不同类型进行转化，如有其它类型没有考虑周全的，使用发现的时候添加
}else if(o instanceof Float){ char type = 'x';
type = 3; if(o instanceof Integer){
}else if(o instanceof String){ type = 1;
type = 4; }else if(o instanceof Double){
}else if(o instanceof Date){ type = 2;
type = 5; }else if(o instanceof Float){
}else if(o instanceof Calendar){ type = 3;
type = 6; }else if(o instanceof String){
}else if(o instanceof Boolean){ type = 4;
type = 7; }else if(o instanceof Date){
}else if(o == null) { type = 5;
type = 8; }else if(o instanceof Calendar){
} type = 6;
}else if(o instanceof Boolean){
switch (type) { type = 7;
case 1:nCell.setCellValue((Integer)o);break; }else if(o == null) {
case 2:nCell.setCellValue((Double)o);break; type = 8;
case 3:nCell.setCellValue((Float)o);break; }
case 4:nCell.setCellValue((String)o);break;
case 5:nCell.setCellValue(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(o));break; switch (type) {
case 6:nCell.setCellValue((Calendar)o);break; case 1:nCell.setCellValue((Integer)o);break;
case 7:nCell.setCellValue((Boolean)o);break; case 2:nCell.setCellValue((Double)o);break;
case 8:nCell.setCellValue("");break; case 3:nCell.setCellValue((Float)o);break;
default:nCell.setCellValue(o + "");break; case 4:nCell.setCellValue((String)o);break;
} case 5:nCell.setCellValue(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(o));break;
} case 6:nCell.setCellValue((Calendar)o);break;
case 7:nCell.setCellValue((Boolean)o);break;
} case 8:nCell.setCellValue("");break;
default:nCell.setCellValue(o + "");break;
}
}
//读取 excel
//读取excel表头
public static Map readExcelHead(File file, String[] fields) throws IOException {
List<Map> list = null;
try {
list = readExcel(new FileInputStream(file), fields, 0);//2007 -
} catch (OfficeXmlFileException e) {
list = readExcelPlus(new FileInputStream(file), fields, 0);//2007 +
}
return list.size() > 0 ? list.get(0) : new HashMap();
}
//读取excel表头
public static Map readExcelHead(String fPath, String[] fields) throws IOException {
return readExcelHead(new File(fPath), fields);
}
public static List<Map> readExcel(File file, String[] fields) throws IOException {
List<Map> list = null;
try {
list = readExcel(new FileInputStream(file), fields, -1);//2007 -
} catch (OfficeXmlFileException e) {
list = readExcelPlus(new FileInputStream(file), fields, -1);//2007 +
}
//去除表头
if (list.size() > 0){
list.remove(0);
}
return list;
}
public static List<Map> readExcel(String fPath, String[] fields) throws IOException {
return readExcel(new File(fPath), fields);
}
/**
* excel读取2007-
* @author Lxyer 2016/8/1 10:32.
*/
private static List<Map> readExcel(InputStream is, String[] fields, int lastRowNum) throws IOException,OfficeXmlFileException {
List<Map> list = new ArrayList<>();
HSSFWorkbook wk = new HSSFWorkbook(is);
HSSFSheet sheet = wk.getSheetAt(0);
if (lastRowNum < 0 || lastRowNum > sheet.getLastRowNum()){
lastRowNum = sheet.getLastRowNum();
}
int t = 0;
r:for (int i=0; i<=lastRowNum; i++){
HSSFRow row = sheet.getRow(i);
if (row == null) continue ;
short cellNum = row.getLastCellNum();
//空跳过/连续三行为空结束
if (isEmptyRow(row, fields.length)) {
if (t++ > 3) break;
continue ;
}
Map map = new HashMap();
for (int j=0; j<cellNum && j<fields.length; j++){
HSSFCell cell = row.getCell(j);
if (cell == null){
map.put(fields[j], "");
continue;
}
int cellType = cell.getCellType();
if (cellType == 0){
map.put(fields[j], (long)cell.getNumericCellValue()+"");
}else {
map.put(fields[j], cell.getStringCellValue());
}
}
list.add(map);
}
return list;
}
/**
* excel读取 2007+
* @author Lxyer 2016/8/1 10:32.
*/
private static List<Map> readExcelPlus(InputStream is, String[] fields, int lastRowNum) throws IOException {
List<Map> list = new ArrayList<>();
XSSFWorkbook wk = new XSSFWorkbook(is);
XSSFSheet sheet = wk.getSheetAt(0);
if (lastRowNum < 0 || lastRowNum > sheet.getLastRowNum()){
lastRowNum = sheet.getLastRowNum();
}
int t=0;
r:for (int i=0; i<=lastRowNum; i++){
XSSFRow row = sheet.getRow(i);
if (row == null) continue ;
short cellNum = row.getLastCellNum();
if (isEmptyRow(row, fields.length)) {
if (t++ > 3) break;
continue ;
}
Map map = new HashMap();
//读取数据
for (int j=0; j<cellNum && j<fields.length; j++){
XSSFCell cell = row.getCell(j);
if (cell == null){
map.put(fields[j], "");
continue;
}
int cellType = cell.getCellType();
if (cellType == 0){
map.put(fields[j], (long)cell.getNumericCellValue()+"");
}else {
map.put(fields[j], cell.getStringCellValue());
}
}
list.add(map);
}
return list;
}
//空跳过/连续三行为空结束
private static boolean isEmptyRow(XSSFRow row, int len){
for (int i = 0; i< row.getLastCellNum() && i < len; i++) {
XSSFCell cell = row.getCell(i);//列
if (cell != null && cell.getCellType() != 0
&& cell.getStringCellValue() != null
&& !cell.getStringCellValue().isEmpty()){
//System.out.println("---F");
return false;
}
}
//System.out.println("---T");
return true;
}
private static boolean isEmptyRow(HSSFRow row, int len){
for (int i = 0; i< row.getLastCellNum() && i < len; i++) {
HSSFCell cell = row.getCell(i);//列
if (cell != null && cell.getCellType() != 0
&& cell.getStringCellValue() != null
&& !cell.getStringCellValue().isEmpty()){
//System.out.println("---F");
return false;
}
}
//System.out.println("---T");
return true;
}
}

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package excel;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import java.util.*;
/**
* Created by liangxianyou at 2018/7/6 10:29.
*/
public class ExportTest {
@Test
public void exportBean(){
Map<String, String> heads = new LinkedHashMap();
heads.put("姓名", "name");
heads.put("年龄", "age");
int total = 5_0000;
List rows = new ArrayList<>(total);
Random random = new Random();
for (int i = 0; i < total; i++) {
String name = UUID.randomUUID().toString();
int age = random.nextInt(100);
rows.add(new Person(name, age));
}
File file = new File("target/user.zip");
if (file.exists()) file.delete();
try {
ExcelExportKit.exportExcelZip(heads, rows, file, ExcelExportKit.TC.BEAN);
} catch (IOException e) {
e.printStackTrace();
}
}
@Test
public void exportMapToZip(){
Map<String, String> heads = new LinkedHashMap();
heads.put("姓名", "name");
heads.put("姓名1", "name1");
heads.put("姓名2", "name2");
heads.put("年龄", "age");
int total = 5_0000;
List<Map> rows = new ArrayList<>(total);
Map r1 = new HashMap();
r1.put("name", "张三");
r1.put("age", 12);
rows.add(r1);
Random random = new Random();
//使用uuid 模拟复杂数据导出
for (int i = 0; i < total; i++) {
Map r2 = new HashMap();
r2.put("name", UUID.randomUUID());
r2.put("name1", UUID.randomUUID());
r2.put("name2", UUID.randomUUID());
r2.put("age", random.nextInt(100));
rows.add(r2);
}
File file = new File("target/hello.zip");
if (file.exists()) file.delete();
try {
ExcelExportKit.exportExcelZip(heads, rows, file, ExcelExportKit.TC.MAP);
} catch (IOException e) {
e.printStackTrace();
}
}
}

33
test/excel/Person.java Normal file
View File

@ -0,0 +1,33 @@
package excel;
/**
* Created by liangxianyou at 2018/7/6 10:28.
*/
public class Person {
private String name;
private int age;
public Person() {
}
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}