java實(shí)現(xiàn)Excel的導(dǎo)入導(dǎo)出
本文實(shí)例為大家分享了java實(shí)現(xiàn)Excel導(dǎo)入導(dǎo)出的具體代碼,供大家參考,具體內(nèi)容如下
一.Excel讀寫技術(shù)

區(qū)別:

二.jxl讀寫基礎(chǔ)代碼
1.從數(shù)據(jù)庫(kù)將數(shù)據(jù)導(dǎo)出到excel表格
public class JxlExcel {
public static void main(String[] args) {
//創(chuàng)建Excel文件
String[] title= {"姓名","課程名","分?jǐn)?shù)"};
File file=new File("f:/sheet1.xls");
try {
file.createNewFile();
//創(chuàng)建工作簿
WritableWorkbook workbook=Workbook.createWorkbook(file);
//創(chuàng)建Sheet
WritableSheet sheet=workbook.createSheet("表格一", 20);
//第一行設(shè)置列名
Label label=null;
for (int i = 0; i < title.length; i++) {
label=new Label(i, 0, title[i]);//第一個(gè)參數(shù)為列,第二個(gè)為行
sheet.addCell(label);
}
Data data=new Data();
ResultSet rs=data.getString();
while(rs.next()) {
System.out.println(rs.getString(1));
label=new Label(0,rs.getRow(),rs.getString(1));
sheet.addCell(label);
label=new Label(1,rs.getRow(),rs.getString(2));
sheet.addCell(label);
label=new Label(2,rs.getRow(),rs.getString(3));
sheet.addCell(label);
}
workbook.write();
workbook.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
2.從Excel表格中讀取數(shù)據(jù)
public class JxlRead {
public static void main(String[] args) {
//創(chuàng)建workbook
try {
Workbook workbook=Workbook.getWorkbook(new File("f:/sheet1.xls"));
//獲取第一個(gè)表格
Sheet sheet=workbook.getSheet(0);
//獲取數(shù)據(jù)
for (int i = 0; i < sheet.getRows(); i++) {
for (int j = 0; j < sheet.getColumns(); j++) {
Cell cell=sheet.getCell(j, i);
System.out.print(cell.getContents()+" ");
}
System.out.println();
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
三.Poi讀寫基礎(chǔ)代碼
//所需jar包:commons-io-2.2.jar;poi-3.11-20141221.jar
//通過poi進(jìn)行excel導(dǎo)入數(shù)據(jù)
public class PoiExcel {
public static void main(String[] args) throws SQLException {
String title[]= {"名字","課程","分?jǐn)?shù)"};
//1.創(chuàng)建Excel工作簿
HSSFWorkbook workbook=new HSSFWorkbook();
//2.創(chuàng)建一個(gè)工作表
HSSFSheet sheet=workbook.createSheet("sheet2");
//3.創(chuàng)建第一行
HSSFRow row=sheet.createRow(0);
HSSFCell cell=null;
//4.插入第一行數(shù)據(jù)
for (int i = 0; i < title.length; i++) {
cell=row.createCell(i);
cell.setCellValue(title[i]);
}
//5.追加數(shù)據(jù)
Data data=new Data();
ResultSet rs=data.getString();
while(rs.next()) {
HSSFRow row2=sheet.createRow(rs.getRow());
HSSFCell cell2=row2.createCell(0);
cell2.setCellValue(rs.getString(1));
cell2=row2.createCell(1);
cell2.setCellValue(rs.getString(2));
cell2=row2.createCell(2);
cell2.setCellValue(rs.getString(3));
}
//創(chuàng)建一個(gè)文件,將Excel內(nèi)容存盤
File file=new File("e:/sheet2.xls");
try {
file.createNewFile();
FileOutputStream stream=FileUtils.openOutputStream(file);
workbook.write(stream);
stream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//將Excel表中內(nèi)容讀取
public class PoiRead {
public static void main(String[] args) {
//需要解析的Excel文件
File file=new File("e:/sheet2.xls");
try {
//獲取工作簿
FileInputStream fs=FileUtils.openInputStream(file);
HSSFWorkbook workbook=new HSSFWorkbook(fs);
//獲取第一個(gè)工作表
HSSFSheet hs=workbook.getSheetAt(0);
//獲取Sheet的第一個(gè)行號(hào)和最后一個(gè)行號(hào)
int last=hs.getLastRowNum();
int first=hs.getFirstRowNum();
//遍歷獲取單元格里的信息
for (int i = first; i <last; i++) {
HSSFRow row=hs.getRow(i);
int firstCellNum=row.getFirstCellNum();//獲取所在行的第一個(gè)行號(hào)
int lastCellNum=row.getLastCellNum();//獲取所在行的最后一個(gè)行號(hào)
for (int j = firstCellNum; j <lastCellNum; j++) {
HSSFCell cell=row.getCell(j);
String value=cell.getStringCellValue();
System.out.print(value+" ");
}
System.out.println();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
如果Excel版本過高則需要改寫用XSSF
public class PoiExpExcel2 {
/**
* POI生成Excel文件
* @author David
* @param args
*/
public static void main(String[] args) {
String[] title = {"id","name","sex"};
//創(chuàng)建Excel工作簿
XSSFWorkbook workbook = new XSSFWorkbook();
//創(chuàng)建一個(gè)工作表sheet
Sheet sheet = workbook.createSheet();
//創(chuàng)建第一行
Row row = sheet.createRow(0);
Cell cell = null;
//插入第一行數(shù)據(jù) id,name,sex
for (int i = 0; i < title.length; i++) {
cell = row.createCell(i);
cell.setCellValue(title[i]);
}
//追加數(shù)據(jù)
for (int i = 1; i <= 10; i++) {
Row nextrow = sheet.createRow(i);
Cell cell2 = nextrow.createCell(0);
cell2.setCellValue("a" + i);
cell2 = nextrow.createCell(1);
cell2.setCellValue("user" + i);
cell2 = nextrow.createCell(2);
cell2.setCellValue("男");
}
//創(chuàng)建一個(gè)文件
File file = new File("e:/poi_test.xlsx");
try {
file.createNewFile();
//將Excel內(nèi)容存盤
FileOutputStream stream = FileUtils.openOutputStream(file);
workbook.write(stream);
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
四.定制導(dǎo)入模板
1.首先準(zhǔn)備好模板的.xml文件,然后導(dǎo)入所需的jar包
例子:student.xml文件
<?xml version="1.0" encoding="UTF-8"?> <excel id="student" code="student" name="學(xué)生信息導(dǎo)入"> <colgroup> <col index="A" width='17em'></col> <col index="B" width='17em'></col> <col index="C" width='17em'></col> <col index="D" width='17em'></col> <col index="E" width='17em'></col> <col index="F" width='17em'></col> </colgroup> <title> <tr height="16px"> <td rowspan="1" colspan="6" value="學(xué)生信息導(dǎo)入" /> </tr> </title> <thead> <tr height="16px"> <th value="編號(hào)" /> <th value="姓名" /> <th value="年齡" /> <th value="性別" /> <th value="出生日期" /> <th value=" 愛好" /> </tr> </thead> <tbody> <tr height="16px" firstrow="2" firstcol="0" repeat="5"> <td type="string" isnullable="false" maxlength="30" /><!--用戶編號(hào) --> <td type="string" isnullable="false" maxlength="50" /><!--姓名 --> <td type="numeric" format="##0" isnullable="false" /><!--年齡 --> <td type="enum" format="男,女" isnullable="true" /><!--性別 --> <td type="date" isnullable="false" maxlength="30" /><!--出生日期 --> <td type="enum" format="足球,籃球,乒乓球" isnullable="true" /><!--愛好 --> </tr> </tbody> </excel>
所需jar包:
commons-lang3-3.1.jar
jdom.jar
poi-3.11-20141221.jar
commons-io-2.2.jar
java代碼:
//準(zhǔn)備工作:導(dǎo)入相關(guān)jar包c(diǎn)ommons-lang3-3.1.jar,jdom.jar,poi-3.11-20141221.jar
public class CreateTemp {
public static void main(String[] args) {
//獲取解析Xml路徑
String path=System.getProperty("user.dir")+"/student.xml";
File file=new File(path);
SAXBuilder builder=new SAXBuilder();
//解析xml文件
try {
Document document=builder.build(file);
//創(chuàng)建Excel
HSSFWorkbook workbook=new HSSFWorkbook();
//創(chuàng)建表格
HSSFSheet sheet=workbook.createSheet("sheet0");
//獲取Xml文件的根節(jié)點(diǎn)
Element root=document.getRootElement();
//獲取模板名稱
String tempName=root.getAttributeValue("name");
//設(shè)置列寬
Element colgroup=root.getChild("colgroup");
setColumnWidth(sheet,colgroup);
//設(shè)置標(biāo)題
int rownum = 0;
int column = 0;
Element title=root.getChild("title");
List<Element> trs=title.getChildren("tr");
for (int i = 0; i <trs.size(); i++) {
Element tr=trs.get(i);
List<Element> tds=tr.getChildren("td");
HSSFRow row=sheet.createRow(rownum);
HSSFCellStyle cellStyle=workbook.createCellStyle();//創(chuàng)建單元格格式
cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);//標(biāo)題居中
for (int j = 0; j < tds.size(); j++) {
Element td=tds.get(j);
HSSFCell cell=row.createCell(j);
Attribute rowspan=td.getAttribute("rowspan");
Attribute colspan=td.getAttribute("colspan");
Attribute value=td.getAttribute("value");
if (value!=null) {
String content=value.getValue();
cell.setCellValue(content);
int rspan=rowspan.getIntValue()-1;
int cspan=colspan.getIntValue()-1;
//設(shè)置字體
HSSFFont font=workbook.createFont();
font.setFontName("仿宋_GB2312");
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//字體加粗
// font.setFontHeight((short)12);
font.setFontHeightInPoints((short)12);
cellStyle.setFont(font);
cell.setCellStyle(cellStyle);
//合并單元格居中
sheet.addMergedRegion(new CellRangeAddress(rspan, rspan, 0, cspan));
}
}
rownum++;
}
//設(shè)置表頭
Element thead=root.getChild("thead");
trs=thead.getChildren("tr");
for (int i = 0; i < trs.size(); i++) {
Element tr=trs.get(i);
HSSFRow row=sheet.createRow(rownum);
List<Element> ths=tr.getChildren("th");
for (int j = 0; j <ths.size(); j++) {
Element th=ths.get(j);
HSSFCell cell=row.createCell(j);
Attribute value=th.getAttribute("value");
if (value!=null) {
String content=value.getValue();
cell.setCellValue(content);
}
}
rownum++;
}
//設(shè)置數(shù)據(jù)區(qū)域樣式
Element tbody = root.getChild("tbody");
Element tr=tbody.getChild("tr");
int repeat=tr.getAttribute("repeat").getIntValue();
List<Element> tds=tr.getChildren("td");
for (int i = 0; i < repeat; i++) {
HSSFRow row=sheet.createRow(rownum);
for (int j = 0; j < tds.size(); j++) {
Element td=tds.get(j);
HSSFCell cell=row.createCell(j);
setType(workbook,cell,td);
}
}
rownum++;
//生成Excel導(dǎo)入模板
File tempFile=new File("e:/"+tempName+".xls");
tempFile.delete();
tempFile.createNewFile();
FileOutputStream fos=FileUtils.openOutputStream(tempFile);
workbook.write(fos);
fos.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private static void setType(HSSFWorkbook workbook, HSSFCell cell, Element td) {
Attribute typeAttr = td.getAttribute("type");
String type = typeAttr.getValue();
HSSFDataFormat format = workbook.createDataFormat();
HSSFCellStyle cellStyle = workbook.createCellStyle();
if("NUMERIC".equalsIgnoreCase(type)){
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
Attribute formatAttr = td.getAttribute("format");
String formatValue = formatAttr.getValue();
formatValue = StringUtils.isNotBlank(formatValue)? formatValue : "#,##0.00";
cellStyle.setDataFormat(format.getFormat(formatValue));
}else if("STRING".equalsIgnoreCase(type)){
cell.setCellValue("");
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cellStyle.setDataFormat(format.getFormat("@"));
}else if("DATE".equalsIgnoreCase(type)){
cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
cellStyle.setDataFormat(format.getFormat("yyyy-m-d"));
}else if("ENUM".equalsIgnoreCase(type)){
CellRangeAddressList regions =
new CellRangeAddressList(cell.getRowIndex(), cell.getRowIndex(),
cell.getColumnIndex(), cell.getColumnIndex());
Attribute enumAttr = td.getAttribute("format");
String enumValue = enumAttr.getValue();
//加載下拉列表內(nèi)容
DVConstraint constraint =
DVConstraint.createExplicitListConstraint(enumValue.split(","));
//數(shù)據(jù)有效性對(duì)象
HSSFDataValidation dataValidation = new HSSFDataValidation(regions, constraint);
workbook.getSheetAt(0).addValidationData(dataValidation);
}
cell.setCellStyle(cellStyle);
}
private static void setColumnWidth(HSSFSheet sheet, Element colgroup) {
List<Element> cols=colgroup.getChildren("col");//獲取col的節(jié)點(diǎn)
for (int i = 0; i < cols.size(); i++) {
Element col=cols.get(i);
Attribute width=col.getAttribute("width");//獲取每列中的width屬性
String unit = width.getValue().replaceAll("[0-9,\\.]", "");//單位
String value = width.getValue().replaceAll(unit, "");//數(shù)值
int v=0;
if(StringUtils.isBlank(unit) || "px".endsWith(unit)){
v = Math.round(Float.parseFloat(value) * 37F);
}else if ("em".endsWith(unit)){
v = Math.round(Float.parseFloat(value) * 267.5F);
}//對(duì)單位進(jìn)行判斷
sheet.setColumnWidth(i, v);
}
}
}
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
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