本文实例讲述了java实现的导出Excel工具类。分享给大家供大家参考，具体如下：
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ExcelExportUtil：
package com.excel;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.regex.Pattern;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.Number;
import jxl.write.NumberFormat;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;
/**
* 生成excel表格
*
* @author
*
*/
public class ExcelExportUtil {
/**
* 构造器
*
*/
public ExcelExportUtil() {
}
/**
* 生成具有一定格式excel
*
* @param sheetName
* sheet名称,默认为sheet1
* @param nf
* 数字类型的格式 如:jxl.write.NumberFormat nf = new
* jxl.write.NumberFormat("#.##");默认无格式
* @param content
* 二维数组,要生成excel的数据来源
* @param 合并项
* 每一项的数据格式为0,1,0,2 即：把(0,1)和(0,2)合并--->第1列的第一、二个元素合并
* @param os
* excel输出流
* @param row
* 需要水平居中的行,默认居左。以逗号分隔的字符串
* @param col
* 需要水平居中的列,默认居左。以逗号分隔的字符串
*/
public void export(String sheetName, NumberFormat nf, String[][] content,
String[] mergeInfo, OutputStream os, String row, String col) {
if (VerifyUtil.isNullObject(content, os) || VerifyUtil.isNull2DArray(content)) {
return;
}
// 默认名称
if (VerifyUtil.isNullObject(sheetName)) {
sheetName = "sheet1";
}
Set rows = this.getInfo(row);
Set cols = this.getInfo(col);
WritableWorkbook workbook = null;
try {
workbook = Workbook.createWorkbook(os);
WritableSheet sheet = workbook.createSheet(sheetName, 0);
for (int i = 0; i < content.length; i++) {
for (int j = 0; j < content[i].length; j++) {
if (content[i][j] == null) {
content[i][j] = "";
}
if (isNumber(content[i][j]) && !rows.contains(i)
&& !cols.contains(j)) {// 处理数字
Number number = null;
if (VerifyUtil.isNullObject(nf)) {// 数字无格式
number = new Number(j, i,
Double.valueOf(content[i][j]));
} else {// 如果有格式,按格式生成
jxl.write.WritableCellFormat wcfn = new jxl.write.WritableCellFormat(
nf);
number = new Number(j, i,
Double.valueOf(content[i][j]), wcfn);
}
sheet.addCell(number);
} else {// 处理非数字
WritableCellFormat format = new WritableCellFormat();
if (rows.contains(i) || cols.contains(j)) {
format.setAlignment(jxl.format.Alignment.CENTRE);
} else {
format.setAlignment(jxl.format.Alignment.LEFT);
}
format.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
Label label = new Label(j, i, content[i][j], format);
sheet.addCell(label);
}
}
}
this.merge(sheet, mergeInfo);
workbook.write();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
workbook.close();
os.close();
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
/**
* 生成固定格式的excel,表格都为文本,水平居左,垂直居中
*
* @param sheetName
* sheet名称,默认为sheet1
* @param content
* 二维数组,要生成excel的数据来源
* @param os
* excel输出流
*/
public void exportFormatExcel(String[][] content, String sheetName,
OutputStream os) {
if (VerifyUtil.isNullObject(content, os) || VerifyUtil.isNull2DArray(content)) {
return;
}
// 默认名称
if (VerifyUtil.isNullObject(sheetName)) {
sheetName = "sheet1";
}
WritableWorkbook workbook = null;
try {
workbook = Workbook.createWorkbook(os);
WritableSheet sheet = workbook.createSheet(sheetName, 0);
for (int i = 0; i < content.length; i++) {
for (int j = 0; j < content[i].length; j++) {
if (content[i][j] == null) {
content[i][j] = "";
}
WritableCellFormat format = new WritableCellFormat();
format.setAlignment(jxl.format.Alignment.LEFT);
format.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
Label label = new Label(j, i, content[i][j], format);
sheet.addCell(label);
}
}
workbook.write();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
workbook.close();
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
/**
* 生成固定格式的excel,表格都为文本,水平居左,垂直居中
*
* @param sheetName
* sheet名称,默认为sheet1
* @param content
* Map,要生成excel的数据来源
* @param os
* excel输出流
*/
public void exportFormatExcel(Map content,
String[] salary_name_array, String sheetName, OutputStream os)
{
if (VerifyUtil.isNullObject(content, os) || content.size() == 0) {
return;
}
// 默认名称
if (VerifyUtil.isNullObject(sheetName)) {
sheetName = "sheet1";
}
WritableWorkbook workbook = null;
try {
workbook = Workbook.createWorkbook(os);
WritableSheet sheet = workbook.createSheet(sheetName, 0);
int index = 0;
for (int k = 0; k < salary_name_array.length; k++) {
String[][] value = (String[][]) content
.get(salary_name_array[k]);
if (value != null && value.length > 0) {
if (index != 0) {
index++;
}
WritableCellFormat format1 = new WritableCellFormat();
format1.setAlignment(jxl.format.Alignment.LEFT);
format1.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
Label label1 = new Label(0, index, salary_name_array[k],
format1);
sheet.addCell(label1);
for (int i = 0; i < value.length; i++) {
index++;
for (int j = 0; j < value[i].length; j++) {
if (value[i][j] == null) {
value[i][j] = "";
}
WritableCellFormat format = new WritableCellFormat();
format.setAlignment(jxl.format.Alignment.LEFT);
format.setVerticalAlignment(jxl.format.VerticalAlignment.CENTRE);
Label label = new Label(j, index, value[i][j],
format);
sheet.addCell(label);
}
}
}
}
workbook.write();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
workbook.close();
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
/**
* 合并表格
* @param sheet
* 工作表
* @param mergeInfo
* 要合并的表格的信息
* @throws RowsExceededException
* @throws NumberFormatException
* @throws WriteException
*/
private void merge(WritableSheet sheet, String[] mergeInfo)
throws RowsExceededException, NumberFormatException, WriteException {
if (VerifyUtil.isNullObject(sheet) || VerifyUtil.isNull1DArray(mergeInfo)) {
return;
} else if (!this.isMergeInfo(mergeInfo)) {
return;
} else {
for (String str : mergeInfo) {
String[] temp = str.split(",");
sheet.mergeCells(Integer.parseInt(temp[1]),
Integer.parseInt(temp[0]), Integer.parseInt(temp[3]),
Integer.parseInt(temp[2]));
}
}
}
/**
* 处理要居中的行或列的数据
*
* @param indexes
* 行标或列标
* @return 行坐标或列坐标组成的集合
*/
private Set getInfo(String indexes) {
Set set = new HashSet();
if (VerifyUtil.isNullObject(indexes)) {
return set;
}
String[] temp = indexes.split(",", 0);
for (String str : temp) {
if (isNumeric(str)) {
set.add(Integer.parseInt(str));
}
}
return set;
}
/**
* 判断字符串是否由纯数字组成
*
* @param str
* 源字符串
* @return true是，false否
*/
private boolean isNumeric(String str) {
if (VerifyUtil.isNullObject(str)) {
return false;
}
Pattern pattern = Pattern.compile("[0-9]*");
return pattern.matcher(str).matches();
}
/**
* 判断字符串是否是数字
*
* @param str
* 源字符串
* @return true是，false否
*/
private boolean isNumber(String number) {
// 判断参数
if (VerifyUtil.isNullObject(number)) {
return false;
}
// 查看是否有小数点
int index = number.indexOf(".");
if (index < 0) {
return isNumeric(number);
} else {
// 如果有多个".",则不是数字
if (number.indexOf(".") != number.lastIndexOf(".")) {
return false;
}
String num1 = number.substring(0, index);
String num2 = number.substring(index + 1);
return isNumeric(num1) && isNumeric(num2);
}
}
/**
* 判断合并项内容是否合法
*
* @param mergeInfo
* 合并项 每一项的数据格式为0,1,0,2即把(0,1)和(0,2)合并
* @return true合法,false非法
*/
private boolean isMergeInfo(String[] mergeInfo) {
if (VerifyUtil.isNull1DArray(mergeInfo)) {
return false;
} else {
for (String str : mergeInfo) {
String[] temp = str.split(",");
if (VerifyUtil.isNull1DArray(temp) || temp.length != 4) {
return false;
} else {
for (String s : temp) {
if (!isNumeric(s)) {
return false;
}
}
}
}
}
return true;
}
public static void main(String[] args) {
ExcelExportUtil ee = new ExcelExportUtil();
String[][] content = new String[][] { { "", "第一列", null, "第三列" },
{ "第一行", "aa", "2.00", "22" }, { "第二行", "bb", "3.01", "32" },
{ "第三行", "cc", "4.00", "41" } };
try {
OutputStream os = new FileOutputStream("D:/test2.xls");
// ee.export(null,null, content,null, os);
ee.export(null, null, content,
new String[] { "0,1,0,2", "1,0,3,0" }, os, "0,1", "0");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
VerifyUtil：
package com.excel;
import java.io.OutputStream;
import java.util.Map;
import jxl.write.NumberFormat;
import jxl.write.WritableSheet;
public class VerifyUtil {
public static boolean isNullObject(String[][] content, OutputStream os) {
// TODO Auto-generated method stub
if(content != null && content.length > 0 && os != null)
{
return false;
}
return true;
}
public static boolean isNull2DArray(String[][] content) {
// TODO Auto-generated method stub
if(content != null && content.length > 0)
{
return false;
}
return true;
}
public static boolean isNullObject(NumberFormat nf) {
// TODO Auto-generated method stub
if(nf != null)
{
return false;
}
return true;
}
public static boolean isNullObject(String sheetName) {
if(sheetName != null && !"".equals(sheetName.trim()))
{
return false;
}
return true;
}
public static boolean isNullObject(Map content,
OutputStream os) {
// TODO Auto-generated method stub
if(content != null && content.size() > 0 && os != null)
{
return false;
}
return true;
}
public static boolean isNull1DArray(String[] mergeInfo) {
// TODO Auto-generated method stub
if(mergeInfo != null && mergeInfo.length > 0)
{
return false;
}
return true;
}
public static boolean isNullObject(WritableSheet sheet) {
// TODO Auto-generated method stub
if(sheet != null)
{
return false;
}
return true;
}
}
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