导入导出Excel工具，支持XML和properties配置（一）

需要jxl.jar,dom4j.jar

JXLUtil.java 
  package ssh.util; 
     
    import java.io.File; 
    import java.io.IOException; 
    import java.io.OutputStream; 
    import java.text.SimpleDateFormat; 
    import java.util.ArrayList; 
    import java.util.Date; 
    import java.util.HashMap; 
    import java.util.List; 
    import java.util.Map; 
     
    import javax.servlet.http.HttpServletResponse; 
     
    import jxl.Sheet; 
    import jxl.Workbook; 
    import jxl.format.Alignment; 
    import jxl.format.Border; 
    import jxl.format.BorderLineStyle; 
    import jxl.format.Colour; 
    import jxl.format.UnderlineStyle; 
    import jxl.format.VerticalAlignment; 
    import jxl.write.Label; 
    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; 
     
    /**
     * 导入,导出excel
     * @author gary
     * @version 1.0
     *
     */ 
    public class JXLUtil { 
         
        private JXLReader reader; 
         
        public JXLUtil(){ 
            reader = new JXLReader(); 
        } 
         
         
        /**
         * 返回目标数据库列名key
         * @param target
         * @return
         */ 
        public String getTargetKey(String target){ 
            return reader.getTargetValue(target, "key"); 
        } 
         
        /**
         * 返回目标标题
         * @param target
         * @return
         */ 
        public String getTargetTitle(String target){ 
            return reader.getTargetValue(target, "title"); 
        } 
         
        /**
         * 返回目标文件名
         * @param target
         * @return
         */ 
        public String getTargetFileName(String target){ 
            return reader.getTargetValue(target, "fileName"); 
        } 
         
        /**
         * 导出EXCEL
         * 
         * jxl.xml配置:
         * <jxl>
         *      <目标>
         *          <title>标题</title>
         *          <key>数据库中的列名</key>
         *          <fileName>文件名</fileName>
         *      </目标>
         * </jxl>
         * example:
         * <jxl>
         *      <user>
         *          <title>ID,用户名,登陆密码,真实名字</title>
         *          <key>userId,userName,password,realName</key>
         *          <fileName>userInfo</fileName>
         *      </user>
         * </jxl>
         * 
         * jxl.properties配置:
         * 标题: jxl.目标.title
         * 数据库表中的列名: jxl.目标.key
         * 文件名: jxl.目标.fileName
         * example:
         * jxl.user.title=ID,\u7528\u6237\u540D,\u767B\u9646\u5BC6\u7801,\u771F\u5B9E\u540D\u5B57
         * jxl.user.key=userId,userName,password,realName
         * jxl.user.fileName=userInfo
         * 
         * @param list
         * @param target
         * @param response
         */ 
        public void exportExcel(List<Map<String,?>> list, String target, HttpServletResponse response){ 
             
            try{ 
                //设置table列名 
                String excelTitle = getTargetTitle(target); 
                String[] excelTitleArray = excelTitle.split(","); 
                //文件名 
                String fileName = getTargetFileName(target) + "_" + new SimpleDateFormat("yyyy-MM-dd").format(new Date()); 
                //取得key 
                String excelKey = getTargetKey(target); 
                String[] excelKeyArray = excelKey.split(","); 
                // 取得输出流  
                OutputStream os = response.getOutputStream(); 
                // 清空输出流 
                response.reset();    
                // 设定输出文件头,不用GBK会乱码 
                    response.setHeader("Content-disposition", "attachment; filename=" + new String(fileName.getBytes("GBK"),"ISO-8859-1") + ".xls"); 
                // 定义输出类型  
                response.setContentType("application/msexcel;charset=utf-8"); 
                // 建立excel文件  
                WritableWorkbook wwb; 
                wwb = Workbook.createWorkbook(os); 
                // 创建一个工作表 
                WritableSheet ws = wwb.createSheet("Sheet1", 10);    
                // 设置单元格的文字格式 
                //WritableFont wf = new WritableFont(WritableFont.ARIAL,10,WritableFont.NO_BOLD,false, 
                //        UnderlineStyle.NO_UNDERLINE,Colour.BLUE); 
                WritableFont wf = new WritableFont(WritableFont.ARIAL,11,WritableFont.BOLD,false, 
                UnderlineStyle.NO_UNDERLINE,Colour.BLUE); 
                WritableCellFormat wcf = new WritableCellFormat(wf); 
                // 对齐方式 
                wcf.setAlignment(Alignment.CENTRE); 
                wcf.setVerticalAlignment(VerticalAlignment.CENTRE); 
                // 边框 
                wcf.setBorder(Border.ALL, BorderLineStyle.THIN); 
                // 背景色 
                wcf.setBackground(Colour.GRAY_25); 
                ws.setRowView(0, 500); 
                 
                //设置列头名 
                for (int j=0;j<excelKeyArray.length;j++) { 
                    ws.addCell(new Label(j, 0, excelTitleArray[j], wcf)); 
                } 
                //设置内容 
                wcf = new WritableCellFormat(); 
                for (int i = 0; i < list.size(); i++) { 
                    Map<String, ?> mapList = (Map<String, ?>)list.get(i); 
                    for (int j=0;j<excelKeyArray.length;j++) { 
                        ws.addCell(new Label(j, i+1, (mapList.get(excelKeyArray[j])+"").toString(), wcf)); 
                    } 
                } 
                wwb.write(); 
                wwb.close(); 
            } catch (IOException e){ 
            } catch (RowsExceededException e){ 
            } catch (WriteException e){ 
            } 
     
        } 
         
        /**
         * 从excel文件读取数据,返回list
         * @param file
         * @param target
         * @return
         */ 
        public List<Map<String, ?>> getImportData(File file, String target){ 
             
            List<Map<String, ?>> data = new ArrayList<Map<String, ?>>(); 
            try { 
                Workbook book = Workbook.getWorkbook(file); 
         
                // 获得第一个sheet,默认有三个 
                Sheet sheet = book.getSheet(0); 
                // 一共有多少行多少列数据 
                int rows = sheet.getRows(); 
                int columns = sheet.getColumns(); 
         
                boolean hasText = false; 
                for (int i = 0; i < rows; i++) { 
                    // 过滤掉没有文本内容的行 
                    for (int j = 0; j < columns; j++) 
                        if (sheet.getCell(j, i).getContents() != "") { 
                            hasText = true; 
                            break; 
                        } 
                    if (hasText) { 
                        Map<String, String> temp = new HashMap<String, String>(); 
                         
                        //取得key 
                        String excelKey = getTargetKey(target); 
                        String[] excelKeyArray = excelKey.split(","); 
                         
                        for(int k = 0 ; k < excelKeyArray.length ; k++){ 
                            temp.put(excelKeyArray[k], sheet.getCell(k, i).getContents()); 
                        } 
    //                  temp.put(Integer.valueOf(sheet.getCell(0, i).getContents())); 
                        data.add(temp); 
                    } 
                } 
                book.close(); 
            } catch (Exception e) { 
                e.printStackTrace(); 
            } 
            return data; 
        } 
     
         
        //附:jdbc批量导入例子 
         
    //  //添加用户信息 
    //  private static final String SQL_ADD_USER =  
    //      "insert into users(userId,userName,password,realName) values (?,?,?,?)"; 
    //   
    //  /** 
    //   * 从Excel文件导入到数据库user表 
    //   */ 
    //    public int[] importUser(final File file) throws Exception { 
    //       
    //        BatchPreparedStatementSetter pss = new BatchPreparedStatementSetter() { 
    //             
    //            public void setValues(PreparedStatement ps, int i) throws SQLException { 
    //                Map row = (Map)(jxlUtil.getImportData(file, "user").get(i)); 
    // 
    //              //取得key 
    //              String excelKey =jxlUtil.getTargetKey("user"); 
    //              String[] excelKeyArray = excelKey.split(","); 
    //               
    //              for(int k = 0 ; k < excelKeyArray.length ; k++){ 
    //                  ps.setString(k+1, (String)row.get(excelKeyArray[k])); 
    //              } 
    //               
    //            } 
    //             
    //            public int getBatchSize() { 
    //                return jxlUtil.getImportData(file, "user").size(); 
    //            } 
    //        }; 
    //        return jt.batchUpdate(SQL_ADD_USER, pss); 
    //    } 
    }