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JAVA 操作Excle解决方案_workbook.createsheet()报 cannot evaluate java.awt.f

workbook.createsheet()报 cannot evaluate java.awt.font.tostring()
前不久公司的一个项目里要用到Excel报表功能,因项目组中的兄弟都没搞过这个东西,所以走了不少弯路。现总结一下JAVA操作Excel的解决方案与大家分亨,有不正确的地方请高手指正。
    JAVA操作Excel目前流行的技术有:
      1: javascript;
      2: Apache的poi;
      3: jxl;
      4: Jfreechart(与其它几种配合使用)
 
     一:报表结构较简单且格式固定 这类报表建议创建模版,用poi/jxl/javascript读取模版里的内容,然后生成新的Excel文件(POI在读取文件和生成新文件过程中会丢失公式,必须在生成的新文件里重写公式),POI读取示例代码如下:
 
  publicclass ReadModelDemo {
    publicstaticvoid createExcelFromTemplate()
    {
        // 读取模板 Excel
        HSSFWorkbook workBook = null ;
       try {
           workBook = new HSSFWorkbook( new FileInputStream( "C://model.xls" ));
       } catch (FileNotFoundException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
 
        // 得到这个 workbook 模版后 , 就可以插入数据了
       
       //......
       workBook.createSheet().createRow(6).createCell(( short )2).setCellValue(15);
       //......
      
       try { // 新建一输出文件流
            FileOutputStream out = new FileOutputStream( "C://test.xls" );
            // 把相应的 Excel 工作簿存盘
            workBook.write(out);
            out.flush();
            out.close();
        } catch (Exception e) {
            e.printStackTrace(); 
        }
     
    }
      
}
 
 
      报表结构不确定且复杂(带分析图) 这类报表建议用 poi/javascript 写数据部分,分析图可以用 jfreechart 来画,画完后插入到 excel 中( poi 3.0 以后支持图片插入)以下示例为 POI 写数据和格式的部分, jfreechart 生成图片及插入到 Excel 的代码略:
import java.io.FileOutputStream;
 
import org.apache.poi.hssf.record.ChartRecord;
import org.apache.poi.hssf.record.FormulaRecord;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFChart;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.Region;
 
publicclass CreateExcelDemo {
 
    /**
      * @param args
      */
    publicstaticvoid main(String[] args) {
        
        HSSFWorkbook workbook = new HSSFWorkbook();
        HSSFSheet sheet = workbook.createSheet();
        HSSFRow row = sheet.createRow(0);
        HSSFCell cell = row.createCell(( short )0);
        // 表名样式
        HSSFCellStyle titlecellstyle = workbook.createCellStyle();
        titlecellstyle.setAlignment(HSSFCellStyle. ALIGN_LEFT ); // 左对齐
        HSSFFont titleFont = workbook.createFont();
        titleFont.setBoldweight(HSSFFont. BOLDWEIGHT_BOLD ); // 粗体
        titleFont.setUnderline(HSSFFont. U_SINGLE );    // 单下画线
        titleFont.setFontName( "Arial" );               // 字体
        titleFont.setFontHeightInPoints(( short )14);   // 大小
        titlecellstyle.setFont(titleFont);
        // 表头样式
        HSSFCellStyle formTitleStyle = workbook.createCellStyle();
        formTitleStyle.setAlignment(HSSFCellStyle. ALIGN_CENTER );
        formTitleStyle.setBorderBottom(HSSFCellStyle. BORDER_THIN );
        formTitleStyle.setBorderLeft(HSSFCellStyle. BORDER_THIN );
        formTitleStyle.setBorderRight(HSSFCellStyle. BORDER_THIN );
        formTitleStyle.setBorderTop(HSSFCellStyle. BORDER_THIN );
        HSSFFont formTitleFont = workbook.createFont();
        formTitleFont.setBoldweight(HSSFFont. BOLDWEIGHT_BOLD );
        formTitleFont.setFontName( "Arial" );
        titleFont.setFontHeightInPoints(( short )10);
        formTitleStyle.setFont(formTitleFont);
        // 表内容样式
        HSSFCellStyle contentStyle = workbook.createCellStyle();
        contentStyle.setAlignment(HSSFCellStyle. ALIGN_CENTER );
        contentStyle.setBorderBottom(HSSFCellStyle. BORDER_THIN );
        contentStyle.setBorderLeft(HSSFCellStyle. BORDER_THIN );
        contentStyle.setBorderRight(HSSFCellStyle. BORDER_THIN );
        contentStyle.setBorderTop(HSSFCellStyle. BORDER_THIN );
        contentStyle.setAlignment(HSSFCellStyle. ALIGN_CENTER );
        HSSFFont contentFont = workbook.createFont();
        contentFont.setFontName( "Arial" );
        contentFont.setFontHeightInPoints(( short )12);
        contentStyle.setFont(contentFont);
        // 百分数显示样式
        HSSFCellStyle percentStyle = workbook.createCellStyle();
        percentStyle.setAlignment(HSSFCellStyle. ALIGN_CENTER );
        percentStyle.setBorderBottom(HSSFCellStyle. BORDER_THIN );
        percentStyle.setBorderLeft(HSSFCellStyle. BORDER_THIN );
        percentStyle.setBorderRight(HSSFCellStyle. BORDER_THIN );
        percentStyle.setBorderTop(HSSFCellStyle. BORDER_THIN );
        percentStyle.setAlignment(HSSFCellStyle. ALIGN_CENTER );
        percentStyle.setDataFormat(( short )9);
        percentStyle.setAlignment(HSSFCellStyle. ALIGN_CENTER );
        HSSFFont percentFont = workbook.createFont();
        percentFont.setFontName( "Arial" );
        percentStyle.setFont(percentFont);
        // 写入内容
        cell.setCellStyle(titlecellstyle);
        cell.setCellValue( "PII-ENG 采购申请流程控制分析报告 " );
       
        row = sheet.createRow(( short )1);
       
        row = sheet.createRow(( short )2);
        cell = row.createCell(( short )0);
        cell.setCellValue( " 报告日期: 2007-10-25      (月报) " );
        row = sheet.createRow(( short )3);
        HSSFRichTextString str1 = new HSSFRichTextString( " 作业标准: (1) HKD0-10 (14 ) " +
             "(2) HKD10 -50 (14 ) (3) >=HKD50 (37 ) (4) 豁免申请 (37 )" );
        HSSFRichTextString str2 = new HSSFRichTextString( " 指标: 作业标准内完成数量 / 总数量 >=80%" );
        row.createCell(( short )0).setCellValue(str1);
        sheet.createRow(( short )4).createCell(( short )0).setCellValue(str2);
        row=sheet.createRow(( short )5);
        cell = row.createCell(( short )0);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 时段 " ));
        cell = row.createCell(( short )1);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( "HKD0-10 " ));
        cell = row.createCell(( short )4);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( "HKD10 -50 " ));
        cell = row.createCell(( short )7);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( ">HKD50 " ));
        cell = row.createCell(( short )10);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 豁免申请 " ));
        cell = row.createCell(( short )13);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 当月合计 " ));
        cell = row.createCell(( short )17);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 指标 " ));
        row = sheet.createRow(( short )6);
        cell = row.createCell(( short )1);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( "<=14 " ));
        cell = row.createCell(( short )2);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( ">14 " ));
        cell = row.createCell(( short )3);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 达标率 " ));
        cell = row.createCell(( short )4);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( "<=14 " ));
        cell = row.createCell(( short )5);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( ">14 " ));
        cell = row.createCell(( short )6);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 达标率 " ));
        cell = row.createCell(( short )7);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( "<=37 " ));
        cell = row.createCell(( short )8);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( ">37 " ));
        cell = row.createCell(( short )9);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 达标率 " ));
        cell = row.createCell(( short )10);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( "<=37 " ));
        cell = row.createCell(( short )11);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( ">37 " ));
        cell = row.createCell(( short )12);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 达标率 " ));
        cell = row.createCell(( short )13);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 达标数 " ));
        cell = row.createCell(( short )14);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 不达标数 " ));
        cell = row.createCell(( short )15);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 合计 " ));
        cell = row.createCell(( short )16);
        cell.setCellStyle(formTitleStyle);
        cell.setCellValue( new HSSFRichTextString( " 合计达标率 " ));
        // 合并单元格
        sheet.addMergedRegion( new Region(5,( short )0,6,( short )0));
        sheet.addMergedRegion( new Region(5,( short )1,5,( short )3));
        sheet.addMergedRegion( new Region(5,( short )4,5,( short )6));
        sheet.addMergedRegion( new Region(5,( short )7,5,( short )9));
        sheet.addMergedRegion( new Region(5,( short )10,5,( short )12));
        sheet.addMergedRegion( new Region(5,( short )13,5,( short )16));
        sheet.addMergedRegion( new Region(5,( short )17,6,( short )17));
        // 加入数据,设置公式
        row = sheet.createRow(( short )7);
        cell = row.createCell(( short )0);
        cell.setCellStyle(contentStyle);
        cell.setCellValue( new HSSFRichTextString( "1 " ));
        cell = row.createCell(( short )1);
        cell.setCellStyle(contentStyle);
        cell.setCellValue(256);
        cell = row.createCell(( short )2);
        cell.setCellStyle(contentStyle);
        cell.setCellValue(1);
        cell = row.createCell(( short )3);
        cell.setCellStyle(percentStyle);
        cell.setCellFormula( "B8/(B8+C8)" );
        cell = row.createCell(( short )4);
        cell.setCellStyle(contentStyle);
        cell.setCellValue(3);
        cell = row.createCell(( short )5);
        cell.setCellStyle(contentStyle);
        cell.setCellValue(5);
        cell = row.createCell(( short )6);
        cell.setCellStyle(percentStyle);
        cell.setCellFormula( "E8/(E8+F8)" );
        cell = row.createCell(( short )7);
        cell.setCellStyle(contentStyle);
        cell.setCellValue(0);
        cell = row.createCell(( short )8);
        cell.setCellStyle(contentStyle);
        cell.setCellValue(5);
        cell = row.createCell(( short )9);
        cell.setCellStyle(percentStyle);
        cell.setCellFormula( "H8/(H8+I8)" );
        cell = row.createCell(( short )10);
        cell.setCellStyle(contentStyle);
        cell.setCellValue(2);
        cell = row.createCell(( short )11);
        cell.setCellStyle(contentStyle);
        cell.setCellValue(0);
        cell = row.createCell(( short )12);
        cell.setCellStyle(percentStyle);
        cell.setCellFormula( "K8/(K8+L8)" );
        cell = row.createCell(( short )13);
        cell.setCellStyle(contentStyle);
        cell.setCellFormula( "sum(b8+e8+h8+k8)" );
        cell = row.createCell(( short )14);
        cell.setCellStyle(contentStyle);
        cell.setCellFormula( "sum(c8+f8+i8+l8)" );
        cell = row.createCell(( short )15);
        cell.setCellStyle(contentStyle);
        cell.setCellFormula( "sum(n8+o8)" );
        cell = row.createCell(( short )16);
        cell.setCellFormula( "n8/p8" );
        cell.setCellStyle(percentStyle);
        cell = row.createCell(( short )17);
        cell.setCellValue(0.8);
        cell.setCellStyle(percentStyle);
        //HSSFChart chart = new HSSFChart();
        //chart.createBarChart(workbook, sheet);
        ChartRecord chart = new ChartRecord();
        chart.setHeight(200);
        chart.setWidth(400);
        chart.setX(20);
        chart.setY(20);
       
        try {
            FileOutputStream fileOut = new FileOutputStream( "C://test.xls" );
            workbook.write(fileOut);
            fileOut.close();
        } catch (Exception e) {
            System. out .println(e.toString());
        }
 
 
    }
 
}
 
    三 以下方法生成的分析图与数据是分离的,当数据区的值改变时,分析图是不会随之改变的,如果要一起改变,就只能全部用无所不能的javascript来Excel了。以下为简单示例:
<HTML>   
 <BODY>   
<script lanage="javascript">
 function    CreateExcel()  
 {      
              var   exceldemo   =   new   ActiveXObject("Excel.Application");              
              exceldemo.Visible   =   true;  
              var   workbook   =   exceldemo.Workbooks.Add();  
              var   sheet   =   workbook.ActiveSheet; 
              sheet.Cells(1,1).Value   =   "1月";   
              sheet.Cells(2,1).Value   =   "2月";   
              sheet.Cells(3,1).Value   =   "3月";   
              sheet.Cells(4,1).Value   =   "4月"; 
              sheet.Cells(1,2).Value   =   "120";  
              sheet.Cells(2,2).Value   =   "250";  
              sheet.Cells(3,2).Value   =   "310";  
              sheet.Cells(4,2).Value   =   "80";   
              exceldemo.Visible   =   true;  
              exceldemo.UserControl   =   true;
              oResizeRange   =   sheet.Range("B1:B4");
              var   chart   =   sheet.Parent.Charts.Add(); 
              chart.ChartWizard(oResizeRange,   -4100,   null,  2);
              chart.SeriesCollection(1).XValues   =   sheet.Range("A1","A4");
              chart.SeriesCollection(1).Name   = '月报';
              chart.Location(2, sheet.Name);
              sheet.Shapes("Chart 1").Top   = sheet.Rows(10).Top;  
               sheet.Shapes("Chart 1").Left   =   sheet.Columns(2).Left;  
 }   
 </SCRIPT>   
 <P><INPUT    id=button1   type=button   value="生成excel" οnclick="CreateExcel()"></P>   
 </BODY>   
 </HTML>
 
 
个人觉得Apache和sun公司在对word和Excel的支持上做得不是很理想,虽然有一个poi和jxl,但使用起来还不如javascript 方便,更要命的是poi和jxl都不支持在Excel中画分析图。要画图的地方只能用模版或者是用jfreechart来画。如果谁有更好的解决方案,请一起交流交流。
 
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