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改善代码实现逻辑

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lxyer 2018-12-02 14:03:46 +08:00
parent 40a64e6392
commit 26b7123ebc
4 changed files with 359 additions and 392 deletions
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62
pom.xml
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@ -5,9 +5,34 @@
<modelVersion>4.0.0</modelVersion>
<groupId>com.lxyer</groupId>
<artifactId>jdk-demo</artifactId>
<version>1.0-SNAPSHOT</version>
<artifactId>excel</artifactId>
<version>0.1.0</version>
<packaging>jar</packaging>
<dependencies>
<!-- poi支持 -->
<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>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>JExcel</finalName>
<sourceDirectory>src</sourceDirectory>
<testSourceDirectory>test</testSourceDirectory>
<resources>
@ -26,37 +51,4 @@
</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.redkale</groupId>
<artifactId>redkale</artifactId>
<version>1.9.3</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>servlet-api</artifactId>
<version>6.0.37</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>

156
src/com/lxyer/excel/poi/ExcelKit.java
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@ -5,17 +5,29 @@ import org.apache.poi.poifs.filesystem.OfficeXmlFileException;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.*;
/**
下载示例
private static boolean downloadExcel(Workbook wb, String xlsName, HttpServletRequest request, HttpServletResponse response) throws IOException{
if(request.getHeader("user-agent").indexOf("MSIE") != -1) {
xlsName = java.net.URLEncoder.encode(xlsName,"utf-8") + ".xls";
} else {
xlsName = new String(xlsName.getBytes("utf-8"),"iso-8859-1")+ ".xls";
}
OutputStream os = response.getOutputStream();
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-disposition", "attachment;filename="+xlsName);
wb.write(os);
return true;
}
* 使用poi报表导出工具类
* 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
@ -24,45 +36,14 @@ import java.util.*;
*/
public class ExcelKit {
/**
* <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>
* hdNames:表头列名<br>
* hds:对应表头的数据KEY<br>
* xlsName:导出文件名<br>
* @author LiangXianYou
* @date 2015-6-25 上午10:22:51
*/
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 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
Row nRow = sheet.createRow(0); //创建行
for(int i=0;i<hdNames.length;i++){
Cell nCell = nRow.createCell(i); //创建单元格
nCell.setCellValue(hdNames[i]);
}
//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++){
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
}
}
return downloadExcel(wb, xlsName, request, response);
}
/**
* Excels导出多个sheet
*
* @author LiangXianYou
* @date 2015-6-16 下午5:56:56
*/
//map:data,sheetName,hds,hdNames,xlsName;request,response
public static <T> boolean exportExcels(List<Map<String, Object>> list,String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
//map:data,sheetName,hds,hdNames,xlsName;
public static <T> Workbook exportExcels(List<Map<String, Object>> list) throws Exception {
Workbook wb = new XSSFWorkbook(); //创建工作薄
for (int i = 0; i < list.size(); i++) {
@ -90,7 +71,7 @@ public class ExcelKit {
}
}
return downloadExcel(wb, xlsName, request, response);
return wb;
}
/**
@ -102,11 +83,12 @@ public class ExcelKit {
* request: HttpServletRequest
* response：HttpServletResponse
* 通过数据构建Excel
* @author LiangXianYou
*
* @throws Exception
* @author LiangXianYou
* @date 2015-3-13 上午11:00:30
*/
public static <T> boolean exportExcel(List<T> list, String[] hdNames, String[] hds, String xlsName, HttpServletRequest request, HttpServletResponse response) throws Exception{
public static <T> Workbook exportExcel(List<T> list, String[] hdNames, String[] hds) throws Exception {
Workbook wb = new XSSFWorkbook(); //创建工作薄
Sheet sheet = wb.createSheet(); //创建工作表
@ -125,46 +107,35 @@ public class ExcelKit {
data2Excel(sheet, o, i + 1, j); //将值写入Excel
}
}
return downloadExcel(wb, xlsName, request, response);
return wb;
}
/**
* 传递一个Wookbook，给定文件名，以及request和response下载Excel文档
* @author LiangXianYou
* @throws IOException
* @date 2015-3-13 上午9:00:36
*/
private static boolean downloadExcel(Workbook wb, String xlsName, HttpServletRequest request, HttpServletResponse response) throws IOException{
if(request.getHeader("user-agent").indexOf("MSIE") != -1) {
xlsName = java.net.URLEncoder.encode(xlsName,"utf-8") + ".xls";
} else {
xlsName = new String(xlsName.getBytes("utf-8"),"iso-8859-1")+ ".xls";
}
OutputStream os = response.getOutputStream();
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-disposition", "attachment;filename="+xlsName);
wb.write(os);
return true;
}
/**
* 通过泛型实例对象得到某一字段值
*
* @author LiangXianYou
* @date 2015-3-13 上午10:53:32
*/
private static <T> Object getFieldValue(T t, String fieldName) throws Exception {
Object v;
if (t == null) {
return null;
}
v = null;
} else if (t instanceof Map) {
v = ((Map) t).get(fieldName); //得到列的值
} else {
Field field = t.getClass().getDeclaredField(fieldName);
field.setAccessible(true); //暴力反射
Object o = field.get(t);//得到字段数据的值
return o;
v = field.get(t); //得到字段数据的值
}
return v;
}
/**
* 将数据写到Excel中
*
* @author LiangXianYou
* @date 2015-3-13 上午10:37:55
*/
@ -195,6 +166,7 @@ public class ExcelKit {
List<Map> list = readExcel(file, fields, 1, null);
return list.size() > 0 ? list.get(0) : new HashMap();
}
//read excel head by sheetName
public static Map readExcelHead(File file, String[] fields, String sheetName) throws IOException {
List<Map> list = readExcel(file, fields, 1, sheetName);
@ -233,20 +205,20 @@ public class ExcelKit {
//read excel sheet[0]
private static List<Map> readExcel(File file, String[] fields, int lastRowNum, String sheetName) throws IOException {
Workbook wk;
try {
wk = new HSSFWorkbook(new FileInputStream(file));//if excel version 2007+ will throws OfficeXmlFileException
}catch (OfficeXmlFileException e){
wk = new XSSFWorkbook(new FileInputStream(file));
}
Workbook wk = getWorkbook(file);
Sheet sheet = sheetName == null ? wk.getSheetAt(0) : wk.getSheet(sheetName);
if (sheet == null) throw new OfficeXmlFileException("sheet["+sheetName+"] can't find");
if (sheet == null) throw new OfficeXmlFileException("sheet[" + sheetName + "] can't findList");
if (lastRowNum < 0 || lastRowNum > sheet.getLastRowNum()) {
lastRowNum = sheet.getLastRowNum();
}
return readExcel(sheet, fields, lastRowNum);
}
/**
* read excel all sheet,
* can read excel 2007+ and 2007-
*
* @param file
* @param fields
* @param lastRowNum
@ -254,12 +226,7 @@ public class ExcelKit {
* @throws IOException
*/
private static Map<String, List<Map>> readExcelAll(File file, String[] fields, int lastRowNum) throws IOException {
Workbook wk;
try {
wk = new HSSFWorkbook(new FileInputStream(file));//if excel version 2007+ will throws OfficeXmlFileException
}catch (OfficeXmlFileException e){
wk = new XSSFWorkbook(new FileInputStream(file));
}
Workbook wk = getWorkbook(file);
Map<String, List<Map>> data = new LinkedHashMap<>();
//reading all sheet
@ -278,20 +245,22 @@ public class ExcelKit {
/**
* read excel
*
* @author Lxyer 2016/8/1 10:32.
*/
private static List<Map> readExcel(Sheet sheet, String[] fields, int lastRowNum) throws OfficeXmlFileException {
if (lastRowNum < 0 || lastRowNum > sheet.getLastRowNum()) {
lastRowNum = sheet.getLastRowNum();
}
if (fields == null || fields.length == 0) {
return readExcel(sheet, lastRowNum);
}
List<Map> list = new ArrayList<>();
if (lastRowNum < 0 || lastRowNum > sheet.getLastRowNum()){
lastRowNum = sheet.getLastRowNum();
}
int t = 0;
r:for (int i=0; i<=lastRowNum; i++){
r:
for (int i = 0; i <= lastRowNum; i++) {
Row row = sheet.getRow(i);
if (row == null) continue;
short cellNum = row.getLastCellNum();
@ -321,7 +290,6 @@ public class ExcelKit {
}
/**
*
* @author Lxyer 2016/9/21 00:38.
*/
private static List<Map> readExcel(Sheet sheet, int lastRowNum) throws OfficeXmlFileException {
@ -331,7 +299,8 @@ public class ExcelKit {
}
int t = 0;
r:for (int i=0; i<=lastRowNum; i++){
r:
for (int i = 0; i <= lastRowNum; i++) {
Row row = sheet.getRow(i);
if (row == null) continue;
short cellNum = row.getLastCellNum();
@ -379,13 +348,7 @@ public class ExcelKit {
//get all sheet names
public static List<String> getSheetNames(File file) throws IOException {
Workbook wk;
try {
wk = new HSSFWorkbook(new FileInputStream(file));//if excel version 2007+ will throws OfficeXmlFileException
}catch (OfficeXmlFileException e){
wk = new XSSFWorkbook(new FileInputStream(file));
}
Workbook wk = getWorkbook(file);
List<String> sheetNames = new ArrayList<>();
for (int i = 0; i < wk.getNumberOfSheets(); i++) {
sheetNames.add(wk.getSheetAt(i).getSheetName());
@ -393,4 +356,15 @@ public class ExcelKit {
return sheetNames;
}
private static Workbook getWorkbook(File file) throws IOException {
Workbook wk;
try {
wk = new HSSFWorkbook(new FileInputStream(file));//if excel version 2007+ will throws OfficeXmlFileException
} catch (OfficeXmlFileException e) {
wk = new XSSFWorkbook(new FileInputStream(file));
}
return wk;
}
}

4
test/com/lxyer/excel/ExcelKitTest.java
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@ -14,7 +14,7 @@ import java.util.Map;
public class ExcelKitTest {
//read excel by fields
@Test
//@Test
public void readTest() throws IOException {
/*String sql1 = "select a, b, c from Sheet1";
String sql2 = "select a, b, c from Sheet1 where a=1 order by b";
@ -33,7 +33,7 @@ public class ExcelKitTest {
}
//read excel no fields
@Test
//@Test
public void readTest2() throws IOException {
List<Map> list = ExcelKit.readExcel(new File("res/test.xlsx"));

19
test/com/lxyer/excel/ExportKitTest.java
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@ -1,13 +1,10 @@
package com.lxyer.excel;
import org.junit.Test;
import org.redkale.net.http.HttpResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.*;
import java.util.concurrent.CountDownLatch;
import java.util.function.BiFunction;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
@ -25,7 +22,7 @@ import java.util.zip.ZipOutputStream;
public class ExportKitTest {
//1、导出List<javabean>示例
@Test
//@Test
public void exportBean(){
Map<String, String> heads = new LinkedHashMap();
heads.put("姓名", "name");
@ -52,7 +49,7 @@ public class ExportKitTest {
}
//2、导出List<Map> 示例
@Test
//@Test
public void exportMapToZip(){
Map<String, String> heads = new LinkedHashMap();
@ -101,6 +98,7 @@ public class ExportKitTest {
* @return
* @throws IOException
*/
/*
public <T> boolean exportExcel(Map head, List<T> rows, HttpServletRequest request, HttpServletResponse response, String xlsName, BiFunction fun) throws IOException {
if(request.getHeader("user-agent") != null && request.getHeader("user-agent").indexOf("MSIE") != -1) {
xlsName = java.net.URLEncoder.encode(xlsName,"utf-8") + ".xls";
@ -120,6 +118,7 @@ public class ExportKitTest {
os.write(ExcelExportKit.exportExcel(head, rows, fun).toString().getBytes());
return true;
}
*/
/**
* 4、导出压缩的excel示例
@ -156,6 +155,7 @@ public class ExportKitTest {
* @return
* @throws IOException
*/
/*
public static <T,U,R> void exportExcel(Map head, List<T> rows, HttpResponse response, String xlsName, BiFunction<T,U,R> fun) throws IOException {
xlsName = new String(xlsName.getBytes("utf-8"),"iso-8859-1")+ ".xls";
@ -165,4 +165,5 @@ public class ExportKitTest {
StringBuilder buf = ExcelExportKit.exportExcel(head, rows, fun);
response.finish(buf.toString().getBytes());
}
*/
}