POI初步学习1

/*
==================================================================== Licensed to the Apache Software Foundation (ASF) under one or more   contributor license agreements.  See the NOTICE file distributed with    this work for additional information regarding copyright ownership.    The ASF licenses this file to You under the Apache License, Version
2.0 (the "License"); you may not use this file except in compliance with the License.  You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software    distributed under the License is distributed on an "AS IS" BASIS,    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or    implied. See the License for the specific language governing    permissions and limitations under the License.
==================================================================== */
package my.exl; import org.apache.poi.xssf.usermodel.*; import    org.apache.poi.ss.usermodel.*; import    org.apache.poi.hssf.usermodel.HSSFWorkbook;
import java.util.Map; import java.util.HashMap; import    java.util.Calendar; import java.io.FileOutputStream; import    java.text.SimpleDateFormat;
/**    * A business plan demo    * Usage:    *  BusinessPlan -xls|xlsx    *    * @author Yegor Kozlov    */ public class BusinessPlan {
private static SimpleDateFormat fmt = new    SimpleDateFormat("dd-MMM");
private static final String[] titles = {
"ID", "Project Name", "Owner", "Days", "Start", "End"};
//sample data to fill the sheet.  private static final String[][]    data = {
{"1.0", "Marketing Research Tactical Plan", "J. Dow", "70", "9-Jul", null,
"x", "x", "x", "x", "x", "x", "x", "x", "x", "x", "x"},
null,
{"1.1", "Scope Definition Phase", "J. Dow", "10", "9-Jul", null,
"x", "x", null, null,  null, null, null, null, null, null, null},
{"1.1.1", "Define research objectives", "J. Dow", "3", "9-Jul", null,
"x", null, null, null,  null, null, null, null, null, null, null},
{"1.1.2", "Define research requirements", "S. Jones", "7", "10-Jul", null,
"x", "x", null, null,  null, null, null, null, null, null, null},
{"1.1.3", "Determine in-house resource or hire vendor", "J. Dow", "2", "15-Jul", null,
"x", "x", null, null,  null, null, null, null, null, null, null},
null,
{"1.2", "Vendor Selection Phase", "J. Dow", "19", "19-Jul", null,
null, "x", "x", "x",  "x", null, null, null, null, null, null},
{"1.2.1", "Define vendor selection criteria", "J. Dow", "3", "19-Jul", null,
null, "x", null, null,  null, null, null, null, null, null, null},
{"1.2.2", "Develop vendor selection questionnaire", "S. Jones, T. Wates", "2", "22-Jul", null,
null, "x", "x", null,  null, null, null, null, null, null, null},
{"1.2.3", "Develop Statement of Work", "S. Jones", "4", "26-Jul", null,
null, null, "x", "x",  null, null, null, null, null, null, null},
{"1.2.4", "Evaluate proposal", "J. Dow, S. Jones", "4", "2-Aug", null,
null, null, null, "x",  "x", null, null, null, null, null, null},
{"1.2.5", "Select vendor", "J. Dow", "1", "6-Aug", null,
null, null, null, null,  "x", null, null, null, null, null, null},
null,
{"1.3", "Research Phase", "G. Lee", "47", "9-Aug", null,
null, null, null, null,  "x", "x", "x", "x", "x", "x", "x"},
{"1.3.1", "Develop market research information needs questionnaire", "G. Lee", "2", "9-Aug", null,
null, null, null, null,  "x", null, null, null, null, null, null},
{"1.3.2", "Interview marketing group for market research needs", "G. Lee", "2", "11-Aug", null,
null, null, null, null,  "x", "x", null, null, null, null, null},
{"1.3.3", "Document information needs", "G. Lee, S. Jones", "1", "13-Aug", null,
null, null, null, null,  null, "x", null, null, null, null, null},  };
public static void main(String[] args) throws Exception {
Workbook wb;

if(args.length > 0 && args[0].equals("-xls")) wb = new HSSFWorkbook();
else wb = new XSSFWorkbook();

Map<String, CellStyle> styles = createStyles(wb);

Sheet sheet = wb.createSheet("Business Plan");

//turn off gridlines
sheet.setDisplayGridlines(false);
sheet.setPrintGridlines(false);
sheet.setFitToPage(true);
sheet.setHorizontallyCenter(true);
PrintSetup printSetup = sheet.getPrintSetup();
printSetup.setLandscape(true);

//the following three statements are required only for HSSF
sheet.setAutobreaks(true);
printSetup.setFitHeight((short)1);
printSetup.setFitWidth((short)1);

//the header row: centered text in 48pt font
Row headerRow = sheet.createRow(0);
headerRow.setHeightInPoints(12.75f);
for (int i = 0; i < titles.length; i++) {
Cell cell = headerRow.createCell(i);
cell.setCellValue(titles[i]);
cell.setCellStyle(styles.get("header"));
}
//columns for 11 weeks starting from 9-Jul
Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);

calendar.setTime(fmt.parse("9-Jul"));
calendar.set(Calendar.YEAR, year);
for (int i = 0; i < 11; i++) {
Cell cell = headerRow.createCell(titles.length + i);
cell.setCellValue(calendar);
cell.setCellStyle(styles.get("header_date"));
calendar.roll(Calendar.WEEK_OF_YEAR, true);
}
//freeze the first row
sheet.createFreezePane(0, 1);

Row row;
Cell cell;
int rownum = 1;
for (int i = 0; i < data.length; i++, rownum++) {
row = sheet.createRow(rownum);
if(data[i] == null) continue;

for (int j = 0; j < data[i].length; j++) {
cell = row.createCell(j);
String styleName;
boolean isHeader = i == 0 || data[i-1] == null;
switch(j){
case 0:
if(isHeader) {
styleName = "cell_b";
cell.setCellValue(Double.parseDouble(data[i][j]));
} else {
styleName = "cell_normal";
cell.setCellValue(data[i][j]);
}
break;
case 1:
if(isHeader) {
styleName = i == 0 ? "cell_h" : "cell_bb";
} else {
styleName = "cell_indented";
}
cell.setCellValue(data[i][j]);
break;
case 2:
styleName = isHeader ? "cell_b" : "cell_normal";
cell.setCellValue(data[i][j]);
break;
case 3:
styleName = isHeader ? "cell_b_centered" : "cell_normal_centered";
cell.setCellValue(Integer.parseInt(data[i][j]));
break;
case 4: {
calendar.setTime(fmt.parse(data[i][j]));
calendar.set(Calendar.YEAR, year);
cell.setCellValue(calendar);
styleName = isHeader ? "cell_b_date" : "cell_normal_date";
break;
}
case 5: {
int r = rownum + 1;
String fmla = "IF(AND(D"+r+",E"+r+"),E"+r+"+D"+r+",\"\")";
cell.setCellFormula(fmla);
styleName = isHeader ? "cell_bg" : "cell_g";
break;
}
default:
styleName = data[i][j] != null ? "cell_blue" : "cell_normal";
}

cell.setCellStyle(styles.get(styleName));
}
}

//group rows for each phase, row numbers are 0-based
sheet.groupRow(4, 6);
sheet.groupRow(9, 13);
sheet.groupRow(16, 18);

//set column widths, the width is measured in units of 1/256th of a character width
sheet.setColumnWidth(0, 256*6);
sheet.setColumnWidth(1, 256*33);
sheet.setColumnWidth(2, 256*20);
sheet.setZoom(3, 4);

// Write the output to a file
String file = "businessplan.xls";
if(wb instanceof XSSFWorkbook) file += "x";
FileOutputStream out = new FileOutputStream(file);
wb.write(out);
out.close();  }
/**   * create a library of cell styles   */  private static    Map<String, CellStyle> createStyles(Workbook wb){
Map<String, CellStyle> styles = new HashMap<String, CellStyle>();
DataFormat df = wb.createDataFormat();

CellStyle style;
Font headerFont = wb.createFont();
headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex());
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
style.setFont(headerFont);
styles.put("header", style);

style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex());
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
style.setFont(headerFont);
style.setDataFormat(df.getFormat("d-mmm"));
styles.put("header_date", style);

Font font1 = wb.createFont();
font1.setBoldweight(Font.BOLDWEIGHT_BOLD);
style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_LEFT);
style.setFont(font1);
styles.put("cell_b", style);

style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setFont(font1);
styles.put("cell_b_centered", style);

style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_RIGHT);
style.setFont(font1);
style.setDataFormat(df.getFormat("d-mmm"));
styles.put("cell_b_date", style);

style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_RIGHT);
style.setFont(font1);
style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
style.setDataFormat(df.getFormat("d-mmm"));
styles.put("cell_g", style);

Font font2 = wb.createFont();
font2.setColor(IndexedColors.BLUE.getIndex());
font2.setBoldweight(Font.BOLDWEIGHT_BOLD);
style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_LEFT);
style.setFont(font2);
styles.put("cell_bb", style);

style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_RIGHT);
style.setFont(font1);
style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
style.setDataFormat(df.getFormat("d-mmm"));
styles.put("cell_bg", style);

Font font3 = wb.createFont();
font3.setFontHeightInPoints((short)14);
font3.setColor(IndexedColors.DARK_BLUE.getIndex());
font3.setBoldweight(Font.BOLDWEIGHT_BOLD);
style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_LEFT);
style.setFont(font3);
style.setWrapText(true);
styles.put("cell_h", style);

style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_LEFT);
style.setWrapText(true);
styles.put("cell_normal", style);

style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_CENTER);
style.setWrapText(true);
styles.put("cell_normal_centered", style);

style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_RIGHT);
style.setWrapText(true);
style.setDataFormat(df.getFormat("d-mmm"));
styles.put("cell_normal_date", style);

style = createBorderedStyle(wb);
style.setAlignment(CellStyle.ALIGN_LEFT);
style.setIndention((short)1);
style.setWrapText(true);
styles.put("cell_indented", style);

style = createBorderedStyle(wb);
style.setFillForegroundColor(IndexedColors.BLUE.getIndex());
style.setFillPattern(CellStyle.SOLID_FOREGROUND);
styles.put("cell_blue", style);

return styles;  }
private static CellStyle createBorderedStyle(Workbook wb){
CellStyle style = wb.createCellStyle();
style.setBorderRight(CellStyle.BORDER_THIN);
style.setRightBorderColor(IndexedColors.BLACK.getIndex());
style.setBorderBottom(CellStyle.BORDER_THIN);
style.setBottomBorderColor(IndexedColors.BLACK.getIndex());
style.setBorderLeft(CellStyle.BORDER_THIN);
style.setLeftBorderColor(IndexedColors.BLACK.getIndex());
style.setBorderTop(CellStyle.BORDER_THIN);
style.setTopBorderColor(IndexedColors.BLACK.getIndex());
return style;  } }