使用JExcel导出excel文件

package org.aaa.portal.tools;



import java.io.File;

import java.io.IOException;

import java.util.List;

import java.util.Map;



import jxl.Workbook;

import jxl.format.Alignment;

import jxl.format.Border;

import jxl.format.BorderLineStyle;

import jxl.format.VerticalAlignment;

import jxl.write.Label;

import jxl.write.Number;

import jxl.write.WritableCellFormat;

import jxl.write.WritableFont;

import jxl.write.WritableSheet;

import jxl.write.WritableWorkbook;

import jxl.write.WriteException;

import jxl.write.biff.RowsExceededException;

import net.sf.json.JSONArray;

import net.sf.json.JSONObject;





public class ExcelUtils {

    public static final String COLUMN_KEY="key";    //列的键，对应JSONObject的key

    public static final String COLUMN_TEXT="text";    //列头名称

    /**

     * 把JSONArray存储为Excel

     * @param fileName    完整文件路径名称

     * @param sheetName    sheet 名称

     * @param ja JSONArray

     * @param columns    

     *     List<Map<String, String>> 按照list Item的顺序生成列

     *    Map格式：        

             Map<String,String> column1 =new HashMap<String,String>();

            column1.put(ExcelUtils.COLUMN_KEY, "sUserName");

            column1.put(ExcelUtils.COLUMN_TEXT, "用户名");

            columns.add(column1);

     */

    public static boolean exportFromJSONArray(String fileName, String sheetName,JSONArray ja,

            List<Map<String, String>> columns) {

        boolean isSuccess=true;

        WritableWorkbook book;

        try {

            //确保保存文件目录存在

            String filePathStr=fileName.substring(0,fileName.lastIndexOf(File.separatorChar));

            File filePath=new File(filePathStr);

            if(!filePath.exists()){

                filePath.mkdirs();

            }

            //确保保存文件存在

            File file=new File(fileName);

            if(!file.exists()){

                file.createNewFile();

            }

            // 在指定地址创建EXCEL表

            book = Workbook.createWorkbook(file);

            // 设置第一个工作薄的名字

            WritableSheet sheet = book.createSheet(sheetName, 0);



            // 设置列头

            for (int i = 0; i < columns.size(); i++) {

                // 设置列宽

                sheet.setColumnView(i, 20);

                // 设置列头样式

                // 分别设置表头，表元的格式

                WritableFont fontb = new WritableFont(WritableFont.ARIAL, 8,

                        WritableFont.BOLD, false); // 粗体

                WritableCellFormat formatb = new WritableCellFormat(fontb);

                formatb.setAlignment(Alignment.CENTRE); // 水平居中

                formatb.setVerticalAlignment(VerticalAlignment.CENTRE); // 垂直居中

                formatb.setBorder(Border.ALL, BorderLineStyle.THIN); // 边框

                // 填充列名

                Label labelb = new Label(i, 0, columns.get(i).get("text"),

                        formatb);

                sheet.addCell(labelb);

            }





            //设置数据单元格格式

            WritableFont fontc = new WritableFont(WritableFont.ARIAL, 8,

                    WritableFont.NO_BOLD, false);

            WritableCellFormat formatc = new WritableCellFormat(fontc);

            formatc.setAlignment(Alignment.CENTRE);

            formatc.setVerticalAlignment(VerticalAlignment.CENTRE);

            formatc.setBorder(Border.ALL, BorderLineStyle.THIN);

            // 填充数据

            for (int i = 0; i < ja.size(); i++) {

                JSONObject jo = ja.getJSONObject(i);

                // 按照预设的列顺序填充

                for (int j = 0; j < columns.size(); j++) {

                    String key = columns.get(j).get("key");

                    Object text = jo.get(key);

                    // 如果是数字，则按照数字的格式填充

                    if (text != null && text.toString().matches("\\d+")) {

                        Number numberc = new Number(j, i+1, Long.parseLong(text.toString()),

                                formatc);

                        sheet.addCell(numberc);

                    } else {

                        //其余全按文字处理

                        Label labelb = new Label(j, i+1, text.toString(), formatc);

                        sheet.addCell(labelb);

                    }

                }

            }



            

            book.write();

            book.close();

        } catch (IOException e) {

            e.printStackTrace();

            isSuccess=false;

        } catch (RowsExceededException e) {

            e.printStackTrace();

            isSuccess=false;

        } catch (WriteException e) {

            e.printStackTrace();

            isSuccess=false;

        }

        return isSuccess;

    }

}