Android使用jxl快速生成Excel表

super.onCreate();
        


        //模拟数据集合
        students = new ArrayList<Strudent>();
        for (int i = 1; i <= 10; i++) { 
            students.add(new Strudent("小红"+i,"女","1"+i)); 
        }
        exportExcel(this);

/** * 导出excel * @param view */
    public void exportExcel(App app) { 
        file = new File(getSDPath() + "/Record"); 
        makeDir(file); 
        ExcelUtil.initExcel(file.toString() + "/成绩表.xls", title); 
        fileName = getSDPath() + "/Record/成绩表.xls"; 
        System.out.println("=======================" + fileName);
        ExcelUtil.writeObjListToExcel(getRecordData(), fileName, this); 
        }


/** * 将数据集合 转化成ArrayList<ArrayList<String>> * @return */
    private ArrayList<ArrayList<String>> getRecordData() { 
        recordList = new ArrayList(); 
        for (int i = 0; i <students.size(); i++) { 
            Strudent student = students.get(i); 
            ArrayList<String> beanList = new ArrayList<String>();
            beanList.add(student.id); 
            beanList.add(student.name);
            beanList.add(student.sex); 
            recordList.add(beanList); 
            } 
        return recordList; 
        } 
    


    private String getSDPath() {
        File sdDir = null; 
        boolean sdCardExist = Environment.getExternalStorageState().equals( android.os.Environment.MEDIA_MOUNTED); 
        if (sdCardExist) { 
            sdDir = Environment.getExternalStorageDirectory(); 
        } 
        String dir = sdDir.toString(); 
        return dir; 
        } 



    public void makeDir(File dir) {
        if (!dir.getParentFile().exists()) {
            makeDir(dir.getParentFile()); 
            } 
        dir.mkdir(); 
        }

https://www.jianshu.com/p/d3d40a69a9b1

package com.hg.excel;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.widget.Toast;

import jxl.Workbook;
import jxl.WorkbookSettings;
import jxl.format.Colour;
import jxl.write.Label;
import jxl.write.WritableCell;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;

public class ExcelUtil {
    public static WritableFont arial14font = null; 
    public static WritableCellFormat arial14format = null; 
    public static WritableFont arial10font = null; 
    public static WritableCellFormat arial10format = null; 
    public static WritableFont arial12font = null; 
    public static WritableCellFormat arial12format = null; 
    public final static String UTF8_ENCODING = "UTF-8"; 
    public final static String GBK_ENCODING = "GBK";
    /** * 单元格的格式设置 字体大小 颜色 对齐方式、背景颜色等... */ 
    public static void format() { 
        try { 
            arial14font = new WritableFont(WritableFont.ARIAL, 14, WritableFont.BOLD); 
            arial14font.setColour(jxl.format.Colour.LIGHT_BLUE); 
            arial14format = new WritableCellFormat(arial14font); 
            arial14format.setAlignment(jxl.format.Alignment.CENTRE); 
            arial14format.setBorder(jxl.format.Border.ALL,jxl.format.BorderLineStyle.THIN); 
            arial14format.setBackground(jxl.format.Colour.VERY_LIGHT_YELLOW); 
            arial10font = new WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD); 
            arial10format = new WritableCellFormat(arial10font); 
            arial10format.setAlignment(jxl.format.Alignment.CENTRE); 
            arial10format.setBorder(jxl.format.Border.ALL,jxl.format.BorderLineStyle.THIN); 
            arial10format.setBackground(Colour.GRAY_25); 
            arial12font = new WritableFont(WritableFont.ARIAL, 10); 
            arial12format = new WritableCellFormat(arial12font); 
            arial10format.setAlignment(jxl.format.Alignment.CENTRE);//对齐格式 
            arial12format.setBorder(jxl.format.Border.ALL,jxl.format.BorderLineStyle.THIN); //设置边框 
            } catch (WriteException e) {
                e.printStackTrace(); 
                } 
        } 
    /** * 初始化Excel * @param fileName * @param colName */ 
    public static void initExcel(String fileName, String[] colName) 
    { 
        format(); 
        WritableWorkbook workbook = null; 
        try { File file = new File(fileName); 
        if (!file.exists()) {
            file.createNewFile(); 
            } 
        workbook = Workbook.createWorkbook(file); 
        WritableSheet sheet = workbook.createSheet("成绩表", 0); 
        //创建标题栏 
        sheet.addCell((WritableCell) new Label(0, 0, fileName,arial14format)); 
        for (int col = 0; col < colName.length; col++) {
            sheet.addCell(new Label(col, 0, colName[col], arial10format)); 
            } 
        sheet.setRowView(0,340); 
        //设置行高 
        workbook.write(); 
        } catch (Exception e) {
            e.printStackTrace(); 
            } finally {
                if (workbook != null) {
                    try {
                        workbook.close(); 
                        } catch (Exception e) {
                            e.printStackTrace(); 
                            } 
                    } 
                } 
        } 
    @SuppressWarnings("unchecked") 
    public static <T> void writeObjListToExcel(List<T> objList,String fileName, Context c) {
        if (objList != null && objList.size() > 0) {
            WritableWorkbook writebook = null; 
            InputStream in = null; 
            try { 
                WorkbookSettings setEncode = new WorkbookSettings(); 
                setEncode.setEncoding(UTF8_ENCODING); 
                in = new FileInputStream(new File(fileName)); 
                Workbook workbook = Workbook.getWorkbook(in); 
                writebook = Workbook.createWorkbook(new File(fileName),workbook); 
                WritableSheet sheet = writebook.getSheet(0); 
                // sheet.mergeCells(0,1,0,objList.size()); //合并单元格 
                // sheet.mergeCells() 
                for (int j = 0; j < objList.size(); j++) {
                    ArrayList<String> list = (ArrayList<String>) objList.get(j); 
                    for (int i = 0; i < list.size(); i++) { 
                        sheet.addCell(new Label(i, j + 1, list.get(i),arial12format)); 
                        if (list.get(i).length() <= 5){ 
                            sheet.setColumnView(i,list.get(i).length()+8); //设置列宽 
                            }else { sheet.setColumnView(i,list.get(i).length()+5); //设置列宽 
                            } 
                        } sheet.setRowView(j+1,350); //设置行高 
                        } writebook.write(); 
                        Toast.makeText(c, "导出到手机存储中文件夹Record成功", Toast.LENGTH_SHORT).show(); 
                        } catch (Exception e) {
                            e.printStackTrace(); 
                            } finally {
                                if (writebook != null) {
                                    try { writebook.close(); 
                                    } catch (Exception e) { e.printStackTrace(); 
                                    } 
                                    } if (in != null) {
                                        try { in.close(); 
                                        } catch (IOException e) {
                                            e.printStackTrace(); 
                                            } 
                                        } 
                                    } 
            } 
        } 
                        }
//                    }
//                }
//        }
//        }
//    }
//
//
//
//
//}

    private ArrayList<ArrayList<String>> recordList; 
    private List<Strudent> students; 
    private static String[] title = { "编号","姓名","性别","年龄","班级","数学","英语","语文" }; 
    private File file; 
    private String fileName;