excel导入导出的两种方式：csv和XLS

依赖

 <dependency>
             <groupId>net.sourceforge.jexcelapi</groupId>
             <artifactId>jxl</artifactId>
             <version>2.6.12</version>
</dependency>

　　

XLS

package export;

import java.io.File;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;


public class XLSUtil implements Serializable {
    
    public static boolean createXls(String tableName,List<Object> head, List<List<Object>> dataList,
            String outPutPath, String filename){
        WritableWorkbook book = null;
         try {
             String filePath = outPutPath+filename+".xls";
             XLSUtil.checkFile(filePath);
             // 打开文件
             book = Workbook.createWorkbook(new File(filePath));
             WritableSheet sheet = book.createSheet(filename, 0);
             if(head!=null&&head.size()>0){
                 for (int i = 0; i < head.size(); i++) {
                     Label label = new Label(i, 0, (String) head.get(i));
                     // 将定义好的单元格添加到工作表中
                     sheet.addCell(label);
                }
             }
             if(dataList!=null&&dataList.size()>0){
                 for (int i = 0; i < dataList.size(); i++) {
                     List<Object> list = dataList.get(i);
                     // 保存数字的单元格必须使用Number的完整包路径
                     for (int j = 0; j < list.size(); j++) {
                         Label label = new Label(j, i+1,  (String) list.get(j));
                         sheet.addCell(label);
                    }
                }
             }
             // 写入数据并关闭文件
             book.write();
         } catch (Exception e) {
             System.out.println(e);
         }finally{
             if(book!=null){
                 try {
                     book.close();
                 } catch (Exception e) {
                     e.printStackTrace();
                 } 
             }
         }
        return true;
    }
    
    public static void checkFile(String filename) {
        File file = new File(filename);
        if(!file.getParentFile().exists()){
            file.getParentFile().mkdirs();
        } 
        if(!file.exists()){
            try {
                file.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        
    }

    public static void main(String[] args) {
        
        String tableName = "学生";
        List<Object> head = new ArrayList<Object>();
        head.add("你好");
        head.add("我好");
        head.add("大家好");
        
        List<List<Object>> dataList = new ArrayList<List<Object>>();
        List<Object> head1 = new ArrayList<Object>();
        head1.add("1");
        head1.add("2");
        head1.add("3");
        
        dataList.add(head1);
        dataList.add(head1);
        dataList.add(head1);
        
        
        String filename = "我的文件";
        String outPutPath = "F:/test/aqa/";
        
        XLSUtil.createXls(tableName, head, dataList, outPutPath, filename);
//        XLSUtil.xlsExport(tableName , head , dataList, outPutPath , filename );
    }
}

csv

package export;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class CSVUtil implements Serializable {
      /**
     * CSV文件生成方法
     * @param head
     * @param dataList
     * @param outPutPath
     * @param filename
     * @return
     */
    public static File createCSVFile(List<Object> head, List<List<Object>> dataList,
                                     String outPutPath, String filename) {
        File csvFile = null;
        BufferedWriter csvWtriter = null;
        try {
            csvFile = new File(outPutPath + File.separator + filename + ".csv");
            System.out.println(File.separator);
            File parent = csvFile.getParentFile();
            if (parent != null && !parent.exists()) {
                parent.mkdirs();
            }
            csvFile.createNewFile();
            csvWtriter =  new BufferedWriter(new OutputStreamWriter(new FileOutputStream( csvFile)));
            // 写入文件头部
            writeRow(head, csvWtriter);
            // 写入文件内容
            for (List<Object> row : dataList) {
                writeRow(row, csvWtriter);
            }
            csvWtriter.flush();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                csvWtriter.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return csvFile;
    }
 
    /**
     * 写一行数据方法
     * @param row
     * @param csvWriter
     * @throws IOException
     */
    private static void writeRow(List<Object> row, BufferedWriter csvWriter) throws IOException {
        // 写入文件头部
        for (Object data : row) {
            StringBuffer sb = new StringBuffer();
            String rowStr = sb.append("\"").append(data).append("\",").toString();
            csvWriter.write(rowStr);
        }
        csvWriter.newLine();
    }
    
    
    public static void main(String[] args) {
         List<Object> exportData = new ArrayList<Object>();
         exportData.add("第一列");
         exportData.add("第二列");
         exportData.add("第三列");
         List<List<Object>> datalist = new ArrayList<List<Object>>();
         List<Object> data=new ArrayList<Object>();
         data.add("111");
         data.add("222");
         data.add("333");
         List<Object> data1=new ArrayList<Object>();
         data1.add("444");
         data1.add("555");
         data1.add("666");
         datalist.add(data);
         datalist.add(data1);
         String path = "d:/export/";
         String fileName = "文件导出";
         
         File file = CSVUtil.createCSVFile(exportData, datalist, path, fileName);
         String fileName2 = file.getName();
         System.out.println("文件名称：" + fileName2);
    }
}