Java操作Excel

/**
* 创建Excel文件方法，供外部调用
* @param fileName 文件名
* @param list<HashMap<String,String>>
* @return true 创建成功  false 创建失败
* @throws FileNotFoundException
* @throws IOException
*/
public static boolean createExcel(String fileName,List <HashMap<String,String>> list) throws FileNotFoundException, IOException{
if(fileName.endsWith(".xls")){
return createExcel2003(fileName, list);
}else if (fileName.endsWith(".xlsx")){
return createExcel2007(fileName, list);
}else {
return false;
}
}
/**
*
* @param fileName
* @param list
* @return
* @throws FileNotFoundException
* @throws IOException
*/
public static boolean createExcel2003(String fileName,List <HashMap<String,String>> list) throws FileNotFoundException, IOException{
if(list==null||list.size()==0){
return false;
}
HSSFWorkbook xls = new HSSFWorkbook();
HSSFSheet sheet= xls.createSheet();
HashMap<String,String> map=null;
//遍历list
for(int i=0;i<list.size();i++){
HSSFRow rows= sheet.createRow(i);
map=list.get(i);
Set<String> set=map.keySet();
Iterator<String> iterator=set.iterator();
int j=0;
while(iterator.hasNext()){
String key=iterator.next();
HSSFCell cell=rows.createCell(j);
cell.setCellValue(map.get(key));//赋值
j++;
}
}
FileOutputStream out=new FileOutputStream(new File(fileName));
xls.write(out);
xls.close();
out.flush();
out.close();
return true;
}
/**
*
* @param fileName
* @param list
* @return
* @throws FileNotFoundException
* @throws IOException
*/
public static boolean createExcel2007(String fileName,List <HashMap<String,String>> list) throws FileNotFoundException, IOException{
if(list==null||list.size()==0){
return false;
}
//创建对象
XSSFWorkbook xlsx = new XSSFWorkbook();
//创建sheet
XSSFSheet sheet= xlsx.createSheet("工作簿");
//创建map对象，接收传进的参数
HashMap<String,String> map=null;
//遍历list
for(int i=0;i<list.size();i++){
//创建row对象，代表每一行
XSSFRow rows= sheet.createRow(i);
map=list.get(i);
//遍历map对象，把每一个map中value对方到单元格中
Set<String> set=map.keySet();
Iterator<String> iterator=set.iterator();
int j=0;
while(iterator.hasNext()){
String key=iterator.next();
XSSFCell cell=rows.createCell(j);
cell.setCellValue(map.get(key));//赋值
j++;
}
}
//创建流
FileOutputStream out=new FileOutputStream(new File(fileName));
//写到本地文件中
xlsx.write(out);
xlsx.close();
out.flush();
out.close();
return true;
}

package com.demo;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import com.util.ExcelUtil;
/**
* 测试类
* @author NO-1
*
*/
public class Test {
public static void main(String[] args) {
//		String filename="C:/Users/NO-1/Documents/部门.xlsx";
String filename="C:/Users/NO-1/Documents/xmndcS15090700001-2015-11-27.xls";
String filename2="C:/Users/NO-1/Documents/2015-12-03.xls";
try {
//			List<HashMap<String,String>> list=ExcelUtil.readExcel(filename);
//			for(HashMap<String,String> map:list){
//				System.out.println(map);
//			}
List<HashMap<String,String>> list=new ArrayList<HashMap<String,String>>();
HashMap<String,String> map=null;
for(int i=0;i<10;i++){
map=new HashMap<String,String>();
for(int j=0;j<10;j++){
map.put("测试"+j, "测试"+j);
}
list.add(map);
}
boolean isok=ExcelUtil.createExcel(filename2,list);
if(isok){
System.out.println("创建成功");
}else{
System.out.println("创建失败");
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}