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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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15
.gitignore vendored Normal file
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/target/
.project
.classpath
/.settings/
/.externalToolBuilders/
/bin/
*.iml
.idea/
/.idea/
/out/
*.zip
/tmp/
*.swp
~$*

7
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）

49
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>

167
src/excel/ExcelExportKit.java Normal file
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199
ExcelUtil.java → src/excel/poi/ExcelKit.java
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import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
package excel.poi;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.OfficeXmlFileException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* 使用poi报表导出工具类
@ -23,7 +28,7 @@ import org.apache.poi.ss.usermodel.Workbook;
* @param
*
*/
public class ExcelUtil {
public class ExcelKit {
/**
* <b>导出list中map做载体的数据到excel</b><br>
@ -35,9 +40,9 @@ public class ExcelUtil {
* @author LiangXianYou
* @date 2015-6-25 上午10:22:51
*/
public static <T> boolean outPutExcelByMap(List<Map<String, Object>> list, String[] hdNames, String[] hds, String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
public static <T> boolean exportByMap(List<Map<String, Object>> list, String[] hdNames, String[] hds, String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
Workbook wb = new HSSFWorkbook(); //创建工作薄
Workbook wb = new XSSFWorkbook(); //创建工作薄
Sheet sheet = wb.createSheet(); //创建工作表
sheet.autoSizeColumn(( short ) 0 ); //自适应宽度
//写入表头---Excel的第一行数据
@ -63,9 +68,9 @@ public class ExcelUtil {
* @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{
public static <T> boolean exportExcels(List<Map<String, Object>> list,String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
Workbook wb = new HSSFWorkbook(); //创建工作薄
Workbook wb = new XSSFWorkbook(); //创建工作薄
for(int i=0;i<list.size();i++){
Map<String, Object> map = list.get(i);
Sheet sheet = wb.createSheet(); //创建工作表
@ -107,9 +112,9 @@ public class ExcelUtil {
* @throws Exception
* @date 2015-3-13 上午11:00:30
*/
public static <T> boolean outPutExcel(List<T> list, String[] hdNames, String[] hds, String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
public static <T> boolean exportExcel(List<T> list, String[] hdNames, String[] hds, String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
Workbook wb = new HSSFWorkbook(); //创建工作薄
Workbook wb = new XSSFWorkbook(); //创建工作薄
Sheet sheet = wb.createSheet(); //创建工作表
sheet.autoSizeColumn(( short ) 0 ); //自适应宽度
//写入表头---Excel的第一行数据
@ -214,4 +219,162 @@ public class ExcelUtil {
}
}
//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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test/excel/ExportTest.java Normal file
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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();
}
}
}

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test/excel/Person.java Normal file
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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;
}
}