Excel POI通过模版的方式加载数据

源码下载地址：http://download.csdn.net/detail/mexican_jacky/9378632


Excel模版如上，可以通过模版进行Excel样式加载，常量设置

---------------------------------------Excel模版类--------------------------------------

package org.ksea.poi.util;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.util.HashMap;

import java.util.Map;

import javax.management.RuntimeErrorException;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;

import org.apache.poi.ss.usermodel.Cell;

import org.apache.poi.ss.usermodel.CellStyle;

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.ss.usermodel.WorkbookFactory;

//创建Excel模版类,用于来加载模版Excel表

public class ExcelTemplate {

// 创建模版标示符

private static final String DATA_LINE = "datas";

//excel样式标示符

private static final String DEFAULT_STYLE="defaultStyles";

private static final String STYLE="styles";

//样式容器、用于装载第几列所在的样式

private Map<Integer, CellStyle> styles;

// 声明Wrokbook

private Workbook workbook;

//声明sheet表格

private Sheet sheet;

//声明row

private Row currRow;

//声明最后一行数据

private int lastRowIndex;

//初始化行的下标

private int initRowIndex;

//初始化列的下标

private int initCollIndex;

//当前行的下标

private int currRowIndex;

//当前列的下标

private int currCollIndex;

//excel默认样式

private CellStyle defaultStyle;

//设置默认行高样式

private float rowHeight;

//用于记录sernums序列号列列的坐标

private int colSernums;

// single模式

private static ExcelTemplate excelTemplate = new ExcelTemplate();

private ExcelTemplate() {

}

public static ExcelTemplate getInstance() {

return excelTemplate;

}

// 第一步、读取相应模版文档,该方法通过classpath方式读取模版

public void readExcelTemplateByClassPath(String path) {

try {

workbook = WorkbookFactory.create(ExcelTemplate.class.getResourceAsStream(path));

//初始化模版

initTemplate();

} catch (InvalidFormatException e) {

e.printStackTrace();

throw new RuntimeException("Excel模版格式不正确!");

} catch (IOException e) {

e.printStackTrace();

throw new RuntimeException("Excel模版不存在!");

}

}

//第二种读取模版方式、通过path来继续读取

public void readExcelTemplateByPath(String path) {

try {

workbook = WorkbookFactory.create(new File(path));

//初始化模版

initTemplate();

//创建行

createNewRow();

} catch (InvalidFormatException e) {

e.printStackTrace();

throw new RuntimeException("Excel模版格式不正确!");

} catch (IOException e) {

e.printStackTrace();

throw new RuntimeException("Excel模版不存在!");

}

}

//初始化模版

private void initTemplate(){

//得到模版中第一个sheet表格

sheet=workbook.getSheetAt(0);

//初始化配置信息

initConfigData();

//获取最后一行的数据坐标

lastRowIndex=sheet.getLastRowNum();

//初始化完成,创建一行

//currRow=sheet.getRow(currRowIndex);

createNewRow();

}

//初始化模版中的数据信息找到标识符的坐标

private void initConfigData() {

boolean isFind=false;

boolean isFindSernums=false;

for (Row row : sheet) {

//如果找到对应的数据就结束

if(isFind) break;

for (Cell cell : row) {

//如果当前行的数据类型不是字符串类型就继续,因为我们在excel模版中设置的是datas是字符串类型

if(cell.getCellType()!=Cell.CELL_TYPE_STRING) continue;

//获取到当前单元格的值

String cellValue=cell.getStringCellValue().trim();

//找序列号的标示符sernums

if(cellValue.equals("sernums")){

colSernums=cell.getColumnIndex();

isFindSernums=true;

}

if(cellValue.equals("datas")){

//获取当前单元格行的坐标

initRowIndex=cell.getRowIndex();

//获取当前单元格列的坐标

initCollIndex=cell.getColumnIndex();

currRowIndex=initRowIndex;

currCollIndex=initCollIndex;

//获取默认行高

rowHeight=row.getHeightInPoints();

//初始化模版样式

initStyles();

isFind=true;

break;

}

}

}

//最后检查一下在初始化数据的时候有没有找到，如果没找到就初始化序列号

initSernums();

}

//将模版样式初始化数据加载到styles容器中

private void initStyles() {

//初始化样式容器

styles= new HashMap<Integer, CellStyle>();

for (Row row : sheet) {

for (Cell cell : row) {

if(cell.getCellType()!=Cell.CELL_TYPE_STRING) continue;

String cellValue=cell.getStringCellValue().trim();

//如果当前列的值等于defaultstyles设置成默认样式

if(DEFAULT_STYLE.equals(cellValue)){

defaultStyle=cell.getCellStyle();

}

if(STYLE.equals(cellValue)){

styles.put(cell.getColumnIndex(), cell.getCellStyle());

}

}

}

}

//初始化模版sernums序列号的坐标

private void initSernums() {

for (Row row : sheet) {

for (Cell cell : row) {

//如果当前行的数据类型不是字符串类型就继续,因为我们在excel模版中设置的是sernums是字符串类型

if(cell.getCellType()!=Cell.CELL_TYPE_STRING) continue;

//获取到当前单元格的值

String cellValue=cell.getStringCellValue().trim();

if(cellValue.equals("sernums")){

//获取到序列号sernums的坐标

colSernums=cell.getColumnIndex();

}

}

}

}

//用于替换一些常量固定的值

public void replaceConstant(Map<String, String> datas){

for (Row row : sheet) {

for (Cell cell : row) {

String cellValue=cell.getStringCellValue().trim();

//如果当前模版中式#开头就是我们所需要替换的常量

if(cellValue.startsWith("#")){

//如果datas数据中包含有我们的值就进行常量设置

String key=cellValue.substring(1);

if(datas.containsKey(key)){

cell.setCellValue(datas.get(key));

}

}

}

}

}

//创建行

public void createNewRow() {

if(lastRowIndex>currRowIndex && currRowIndex!=initRowIndex){

//移动下一行

sheet.shiftRows(currRowIndex, lastRowIndex, 1, true, true);

lastRowIndex++;

}

currRow=sheet.createRow(currRowIndex);

//设置行高

currRow.setHeightInPoints(rowHeight);

//下一行

currRowIndex++;

//当创建到下一行的单元格的列就应该是初始化的列的坐标

currCollIndex=initCollIndex;

}

//创建列,并为当前单元格赋值

public void createCell(String cellValue){

Cell cell=currRow.createCell(currCollIndex);

cell.setCellValue(cellValue);

setCellStyle(cell);

//到下一个单元格

currCollIndex++;

}

//插入序列号

public void insertSernums(){

int index=1;

Row row=null;

Cell cell= null;

for (int i = initRowIndex; i < currRowIndex; i++) {

//得到当前行

row=sheet.getRow(i);

cell=row.createCell(colSernums);

setCellStyle(cell);

cell.setCellValue(index++);

}

}

//设置样式

public void setCellStyle(Cell cell){

//设置的时候将样式添加进去

cell.setCellStyle(styles.containsKey(currCollIndex)?styles.get(currCollIndex):defaultStyle);

}

//将数据到处到Excel中

public void writeFilePath(String filePath){

FileOutputStream fos=null;

try {

fos= new FileOutputStream(new File(filePath));

workbook.write(fos);

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

throw new RuntimeException("写入的文件不存在!");

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

throw new RuntimeException("写入流失败!");

}finally{

try {

fos.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

public void writeStream(OutputStream os){

try {

workbook.write(os);

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

throw new RuntimeException("写入流失败!");

}finally{

try {

os.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

---------------------------------------测试类--------------------------------------

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;

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.ss.usermodel.WorkbookFactory;

import org.apache.poi.ss.util.WorkbookUtil;

import org.apache.poi.xssf.streaming.SXSSFWorkbook;

import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import org.junit.Test;

import org.ksea.poi.util.ExcelTemplate;

public class PoiTest {

@Test

public void testExcelTemplate(){

ExcelTemplate excelTemplate=ExcelTemplate.getInstance();

excelTemplate.readExcelTemplateByClassPath("/excel/template/default.xls");

//excelTemplate.createNewRow();

excelTemplate.createCell("1111");

excelTemplate.createCell("1112");

excelTemplate.createCell("1113");

excelTemplate.createCell("1114");

excelTemplate.createNewRow();

excelTemplate.createCell("1115");

excelTemplate.createCell("1116");

excelTemplate.createCell("1117");

excelTemplate.createCell("1118");

excelTemplate.createNewRow();

excelTemplate.createCell("1115a");

excelTemplate.createCell("1116a");

excelTemplate.createCell("1117a");

excelTemplate.createCell("1118a");

excelTemplate.createNewRow();

excelTemplate.createCell("1115b");

excelTemplate.createCell("1116b");

excelTemplate.createCell("1117b");

excelTemplate.createCell("1118b");

Map<String, String> datas= new HashMap<String, String>();

datas.put("title", "excel模版测试用例标题");

datas.put("date", "2015-12-24");

datas.put("dep", "帅哥部门");

excelTemplate.replaceConstant(datas);

excelTemplate.insertSernums();

excelTemplate.writeFilePath("e:/poi/testExcel.xls");

}

｝