poi的常用api .

import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.Calendar;import java.util.Date;import java.util.List;import org.apache.poi.hssf.usermodel.HSSFCell;import org.apache.poi.hssf.usermodel.HSSFCellStyle;import org.apache.poi.hssf.usermodel.HSSFDataFormat;import org.apache.poi.hssf.usermodel.HSSFFont;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.HSSFColor;public class ExcelPoi {    /**     *      * @param file 文件的路径     * @throws Exception     */    public void outExcel(File file) throws Exception{        //创建一个输出流，要把生成的文件输出到那个地方        FileOutputStream fos = new FileOutputStream(file);        //生成一个表格对象        HSSFWorkbook wb = new HSSFWorkbook();        //每个文件必须包含一个工作表        //创建一个工作表        HSSFSheet sheet = wb.createSheet("first sheet");        //创建行，参数说明的是第几行        HSSFRow row = sheet.createRow(0);        //创建单元格，参数说明的是第几个单元格        HSSFCell cell = row.createCell(0);        //设置单元和的内容        cell.setCellValue("第一个值");        row.createCell(1).setCellValue(false);        row.createCell(2).setCellValue(2312313.55);        //一下两行设置貌似没有问题实际上是有问题的                row.createCell(3).setCellValue(Calendar.getInstance());        row.createCell(4).setCellValue(new Date());        //对数据进行格式化（style,风格，样式）        //获得wb的日期格式对象        HSSFDataFormat format = wb.createDataFormat();        cell = row.getCell(2);        HSSFCellStyle style = wb.createCellStyle();        style.setDataFormat(format.getFormat("#,###.00"));        //把样式添加到单元格中        cell.setCellStyle(style);        //设置日期的格式        format.getFormat("yyyy-MM-dd");        style = wb.createCellStyle();        style.setDataFormat(format.getFormat("yyyy-MM-dd hh:mm:ss"));        row.getCell(3).setCellStyle(style);        row.getCell(4).setCellStyle(style);                //设置列宽        sheet.setColumnWidth(1, 4000);        sheet.setColumnWidth(2, 4000);        sheet.setColumnWidth(3, 5000);        sheet.setColumnWidth(4, 5000);                        //设置文本的对其方式--左上对其        row = sheet.createRow(1);        //设置行的高        row.setHeightInPoints(100);        System.out.println(row);        cell = row.createCell(0);        System.out.println(cell);        style = wb.createCellStyle();        style.setVerticalAlignment(HSSFCellStyle.VERTICAL_TOP);        style.setAlignment(HSSFCellStyle.ALIGN_LEFT);        cell.setCellValue("左上对其方式");        cell.setCellStyle(style);                //设置文本的对齐方式：--中中        //row = sheet.createRow(1);        cell = row.createCell(1);        System.out.println(cell);        style = wb.createCellStyle();        style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);        style.setAlignment(HSSFCellStyle.ALIGN_CENTER);        cell.setCellValue("种种对其方式");        cell.setCellStyle(style);        //设置文本的对齐方式：--右下        //row = sheet.createRow(1);        System.out.println(row);        cell = row.createCell(2);        System.out.println(cell);        style = wb.createCellStyle();        style.setVerticalAlignment(HSSFCellStyle.VERTICAL_BOTTOM);        style.setAlignment(HSSFCellStyle.ALIGN_RIGHT);        cell.setCellValue("右下对其方式右下对其方式右下对其方式右下对其方式右下对其方式右下对其方式右下对其方式右下对其方式");        cell.setCellStyle(style);        //设置字体        HSSFFont font = wb.createFont();        font.setFontName("宋体");        //font.setFontHeight((short)30);        font.setColor(HSSFColor.GREEN.index);        style = row.getCell(1).getCellStyle();        style.setFont(font);        //设置旋转        style.setRotation((short)10);        //设置自动列宽        //**sheet.autoSizeColumn((short)1);可以使用的        //设置自动换行,是单元格的属性        row.getCell(2).getCellStyle().setWrapText(true);//这样它就自动换行了                //设置边框的颜色        row = sheet.createRow(2);        cell = row.createCell(1);        style = wb.createCellStyle();        //左边框为红色        style.setRightBorderColor(HSSFColor.RED.index);        style.setBorderRight(HSSFCellStyle.BORDER_DOUBLE);                style.setLeftBorderColor(HSSFColor.GREEN.index);        style.setBorderLeft(HSSFCellStyle.BORDER_DASH_DOT_DOT);        //设置粗细        //style.setBorderRight(HSSFCellStyle.BORDER_THICK);        cell.setCellStyle(style);                //移动 从第几行到第几行，第三个值是-1.是向上移动，正是向下移动        sheet.shiftRows(1, 2, 1);                row = sheet.createRow(3);        row.createCell(0);        cell = row.getCell(0);        cell.setCellValue(11);        row.createCell(1);        cell = row.getCell(1);        cell.setCellValue(12);        row.createCell(2);        cell = row.getCell(2);        cell.setCellValue(13);        //怎样去1,2，3的平局值呢        cell = row.createCell(3);        cell.setCellFormula("average(A4:C4)");        //总和        cell = row.createCell(4);        cell.setCellFormula("sum(A4:C4)");        //拆分窗格        //1.上边距        //2.下边距        //3.        //4.        //5.        //sheet.createSplitPane(1000, 2000, 3, 4, 3);        //冻结窗格                sheet.createFreezePane(1, 1);        //把以上设计好的对象写道输出流中去                wb.write(fos);        //关闭流        fos.close();    }    public static void main(String[] args) {        ExcelPoi ep = new ExcelPoi();        try {            ep.outExcel(new File("F:/test.xls"));        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        List<Person> persons = new ArrayList<Person>();        persons.add(new Person(1,"wangguang",false,24));        persons.add(new Person(1,"王广",false,24));        persons.add(new Person(1,"wa哈哈guang",false,24));        persons.add(new Person(1,"wangguang",false,24));        try {            ep.createExcel(persons);        } catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }    public void createExcel(List<Person> persons) throws Exception {        String[] titles = {"ID","姓名","婚否","年龄"};        HSSFWorkbook wb = new HSSFWorkbook();        HSSFSheet sheet = wb.createSheet();        HSSFRow row = sheet.createRow(0);        for(int i=0;i<titles.length;i++) {            row.createCell(i).setCellValue(titles[i]);        }        int i = 1;        for(Person person:persons) {            row = sheet.createRow(i++);            row.createCell(0).setCellValue(person.getId());            row.createCell(1).setCellValue(person.getName());            row.createCell(2).setCellValue(person.isMarr());            row.createCell(3).setCellValue(person.getAge());        }        FileOutputStream fos = new FileOutputStream("d:/person.xls");        wb.write(fos);        fos.close();        System.out.println("-------------------------------");    }}class Person {    public Integer id;    public String name;    public boolean marr;    public int age;    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public boolean isMarr() {        return marr;    }    public void setMarr(boolean marr) {        this.marr = marr;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    public Person() {            }    public Person(Integer id, String name, boolean marr, int age) {        super();        this.id = id;        this.name = name;        this.marr = marr;        this.age = age;    }    }