2021年4月7日

时间:1.5个小时左右

代码:200行左右

博客:1

学习内容:自己尝试写exel表的生成

这个是代码，可以勉强生成也还算可以了。

package bjfu.it.sun.tem;


import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;

import android.widget.Button;
import android.widget.Toast;

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

import bjfu.it.sun.tem.model.dao.TemperatureAccounrDao;
import bjfu.it.sun.tem.model.dao.UserAccountDao;
import bjfu.it.sun.tem.model.db.UserAccountDB;
import bjfu.it.sun.tem.model.dean.Teminfo;
import bjfu.it.sun.tem.util.SPDDataUtils;
import jxl.Workbook;
import jxl.WorkbookSettings;
import jxl.format.Alignment;
import jxl.format.Border;
import jxl.format.BorderLineStyle;
import jxl.format.Colour;
import jxl.format.VerticalAlignment;
import jxl.read.biff.BiffException;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;



public class ExportActivity extends AppCompatActivity implements View.OnClickListener {
    private Button export;
    private AlertDialog alertDialog;
    Teminfo teminfo;
    TemperatureAccounrDao temperatureAccounrDao;
    List<Teminfo>teminfos=new ArrayList<>();
    private UserAccountDao userAccountDao ;

    String[] permissions = {Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE};

    private int REQUEST_PERMISSION_CODE = 1000;

    private static WritableFont arial14font = null;//可写字体
    private static WritableCellFormat arial14format = null;//单元格格式

    private static WritableFont arial10font = null;
    private static WritableCellFormat arial10format = null;

    private static WritableFont arial12font = null;
    private static WritableCellFormat arial12format = null;

    private static WritableFont song12font = null;//可写字体
    private static WritableCellFormat song12format = null;//单元格格式

    private static WritableFont kai12font = null;//可写字体
    private static WritableCellFormat kai12format = null;//单元格格式

    private final static String UTF8_ENCODING = "UTF-8";


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_export);
        requestPermission();

        StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
        StrictMode.setVmPolicy(builder.build());
        builder.detectFileUriExposure();
        initView();

    }

    private void initView(){
        export=findViewById(R.id.export);
        export.setOnClickListener(this);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.export:
                exportExcel(this);

                break;
        }
    }

    //请求权限
    private void requestPermission() {
        if (Build.VERSION.SDK_INT > 23) {
            if (ContextCompat.checkSelfPermission(ExportActivity.this, permissions[0]) == PackageManager.PERMISSION_GRANTED) {
                Log.e(getLocalClassName(),"requestPermission:" + "用户之前已经授予了权限！");
            } else {
                requestPermissions(permissions, REQUEST_PERMISSION_CODE);
            }
        }
    }
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == REQUEST_PERMISSION_CODE) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Log.e(getLocalClassName(),"申请成功");
            } else {
                AlertDialog.Builder builder = new AlertDialog.Builder(ExportActivity.this);
                builder.setTitle("permission");
                builder.setMessage("点击允许才可以使用");
                builder.setPositiveButton("去允许", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        if (alertDialog != null && alertDialog.isShowing()) {
                            alertDialog.dismiss();
                        }
                        ActivityCompat.requestPermissions(ExportActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
                    }
                });
                alertDialog = builder.create();
                alertDialog.setCanceledOnTouchOutside(false);
                alertDialog.show();
            }
        }
    }
    private void showDialogTipUserRequestPermission() {
        ActivityCompat.requestPermissions(this, permissions, 321);
    }

    //单元格的格式设置 字体大小 颜色 对齐方式、背景颜色等...
    private  void format() {
        try {
            //字体 黑体， 字号 14  bold  粗体
            arial14font = new WritableFont(WritableFont.createFont("黑体"), 18, WritableFont.BOLD);
            arial14font.setColour(Colour.BLACK);//字体的颜色
            //   arial14font.setUnderlineStyle(UnderlineStyle.SINGLE);//设置下划线

            //初始化单元格格式
            arial14format = new WritableCellFormat(arial14font);
            arial14format.setAlignment(Alignment.CENTRE);//对齐方式
            arial14format.setBorder(Border.ALL, BorderLineStyle.THIN);//边框的格式
            // arial14format.setBackground(Colour.VERY_LIGHT_YELLOW);//底色


            arial10font = new WritableFont(WritableFont.ARIAL, 10, WritableFont.BOLD);
            arial10format = new WritableCellFormat(arial10font);
            arial10format.setAlignment(Alignment.CENTRE);
            arial10format.setBorder(Border.ALL, BorderLineStyle.THIN);
            arial10format.setBackground(Colour.GRAY_25);

            arial12font = new WritableFont(WritableFont.ARIAL, 10);
            arial12format = new WritableCellFormat(arial12font);
            arial12format.setAlignment(Alignment.CENTRE);
            arial12format.setBorder(Border.ALL, BorderLineStyle.THIN);

            song12font = new WritableFont(WritableFont.createFont("宋体"), 12);
            song12format = new WritableCellFormat(song12font);
            song12format.setAlignment(Alignment.CENTRE);
            song12format.setBorder(Border.ALL, BorderLineStyle.THIN);

            kai12font = new WritableFont(WritableFont.createFont("楷体"), 10);
            kai12format = new WritableCellFormat(kai12font);
            kai12format.setAlignment(Alignment.CENTRE);
            kai12format.setBorder(Border.ALL, BorderLineStyle.THIN);

        } catch (WriteException e) {
            e.printStackTrace();
        }
    }
    /**
     * 初始化Excel
     * 写入字段名称，表名
     *
     * @param filePath  导出excel的存放地址
     * @param sheetName Excel表格的表名
     * @ colName   excel中包含的列名
     */
    public  void initExcel(File filePath, String sheetName) {
        format();
        //创建一个工作薄，就是整个Excel文档
        WritableWorkbook workbook = null;
        try {
//            File file = new File(filePath);
            if (!filePath.exists()) {
                filePath.createNewFile();
            }
            //使用Workbook创建一个工作薄，就是整个Excel文档
            workbook = Workbook.createWorkbook(filePath);
            //设置表格的名称(两个参数分别是工作表名字和插入位置，这个位置从0开始)
            WritableSheet sheet = workbook.createSheet(sheetName, 0);
            //创建label标签：实际就是单元格的标签（三个参数分别是：col + 1列，row + 1行， 内容， 单元格格式）
//            Label label = new Label(0, 0, filePath, arial14format);//设置第一行的单元格标签为：标题
            //将标签加入到工作表中
//            sheet.addCell(label);

            //通过writablesheet.mergeCells(int x,int y,int m,int n);来实现的。
            // 表示将从第x+1列，y+1行到m+1列，n+1行合并 (四个点定义了两个坐标，左上角和右下角)
            sheet.mergeCells(0, 0, 6, 0);
            sheet.addCell(new Label(0, 0, "学生14天健康情况登记表", arial14format));
            sheet.setRowView(0, 520);
            sheet.addCell(new Label(0,1,"单位名称：",song12format));
            sheet.setRowView(1, 520);
            sheet.mergeCells(1,1,3,1);
            sheet.addCell(new Label(1,1,"石家庄铁道大学",kai12format));
            sheet.addCell(new Label(4,1,"填表日期：",song12format));
            sheet.mergeCells(5,1,6,1);
            sheet.addCell(new Label(5,1,timenow(),kai12format));
            sheet.addCell(new Label(0,2,"姓名：",kai12format));
            sheet.mergeCells(1,2,3,2);
            sheet.addCell(new Label(1,2,"贾亚赛",kai12format));

            sheet.addCell(new Label(4,2,"学号：",kai12format));
            sheet.mergeCells(5,2,6,2);
            sheet.addCell(new Label(5,2,"20194058",kai12format));
            sheet.addCell(new Label(0,3,"目前健康状况：",kai12format));
            sheet.setRowView(3, 400);
            sheet.mergeCells(1,3,3,3);
            sheet.addCell(new Label(1,3,"良好"));
            sheet.addCell(new Label(4,3,"手机号：",kai12format));
            sheet.mergeCells(5,3,6,3);
            sheet.addCell(new Label(5,3,"19832586253",kai12format));
            sheet.mergeCells(0, 4, 6, 4);
            sheet.addCell(new Label(0,4,"每日体温、健康状况监测（周期14天）",arial14format));
            sheet.setRowView(4, 520);
            sheet.addCell(new Label(0,5,"日期",kai12format));
            sheet.addCell(new Label(1,5,"每日体温℃",kai12format));
            sheet.addCell(new Label(2,5,"健康状况",kai12format));
            sheet.addCell(new Label(3,5,"当日所在地",kai12format));
            sheet.mergeCells(3,5,4,5);
            sheet.addCell(new Label(5,5,"备注",kai12format));
            sheet.mergeCells(5,5,6,5);

           


            workbook.write();// 写入数据
        } catch (IOException | WriteException e) {
            e.printStackTrace();
        } finally {
            if (workbook != null) {
                try {
                    workbook.close();// 关闭文件
                } catch (IOException | WriteException e) {
                    e.printStackTrace();
                }
            }
        }
    }


    //导出
    private void exportExcel(Context context) {
        String path = getExternalFilesDir("exter_test").getPath();
        String fileName00 = "test.txt";
        File file = new File(path+"/"+"xxxxxxx");
        try {
            if (!file.exists()) {
                boolean mkdir = file.mkdir();//创建文件夹

            }
        }catch (Exception e){
            e.printStackTrace();
        }
        File files=new File(file.getPath()+"/"+"text.xls");
        try {
            if(!files.exists()) {
                boolean newFile = files.createNewFile();//创建文件
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
//        String[] title = {"姓名", "年龄", "男孩","分数"};
        String sheetName = "表格名称";
        initExcel(files,sheetName);


        Toast.makeText(context, "导出Excel成功", Toast.LENGTH_SHORT).show();
  //      writeObjListToExcel(demoBeanList, files.getPath(), context);
    }

    public  String timenow(){
        Calendar calendar = Calendar.getInstance();
        //年
        int year = calendar.get(Calendar.YEAR);
        //月
        int month = calendar.get(Calendar.MONTH) + 1;
        //日
        int day = calendar.get(Calendar.DAY_OF_MONTH);
        //获取系统时间
        //小时
        int hour = calendar.get(Calendar.HOUR_OF_DAY);
        //分钟
        int minute = calendar.get(Calendar.MINUTE);
        //秒
        int second = calendar.get(Calendar.SECOND);
        String tem=year + "年" + month + "月" + day + "日" + hour + ":" + minute;
        return tem;
    }
    //建立一行数据
    //x行，Y列
    public  void createCell(Teminfo person, int x, WritableSheet sheet) throws WriteException {
        Label label=new Label(0,x,person.getTime());
        sheet.addCell(label);
        Label label1=new Label(1,x,person.getTemperature());
        sheet.addCell(label1);
        int t=0;
        String tem="";
        if(Float.parseFloat(person.getTemperature())>35&&Float.parseFloat(person.getTemperature())<37){
            tem="良好";
        }
        else {

            tem="患病";
        }
        Label label2=new Label(2,x,tem);
        sheet.addCell(label2);
        Label label3=new Label(3,x,person.getAddress());
        sheet.addCell(label3);
        Label label4=new Label(4,x,person.getOther());
        sheet.addCell(label4);
    }
    //从第6行开始，插入数据；
    public  void insertdata(WritableSheet sheet) throws WriteException {
        int r=6;
        int t=0;

      //  Log.e("tttttt",persons.size()+"");
        t = teminfos.size();//数据库表中的数据条数；
        if(t>=14){
            //从6行到20行；
            for(Teminfo teminfo:teminfos){
                if(r>19){
                    break;
                }
                createCell(teminfo,r,sheet);
                r++;
            }
        }
        if(t<14){
            for(Teminfo teminfo:teminfos){
                createCell(teminfo,r,sheet);
                r++;
            }
        }

    }
    //得到手机号
    private String getPhone(){
        String str=null;
        str= SPDDataUtils.getUserinfo(this) ;
        return str;
    }

    //得到姓名
    private String getName(){
        String str;
        userAccountDao=new UserAccountDao(this) ;
        str=userAccountDao .getAccountByPhone(getPhone()).getName() ;
        return str;
    }

    //显示信息的方法
    private void showMSg(String msg){
        Toast.makeText(this,msg,Toast.LENGTH_SHORT ).show() ;
    }
}