com.github.fanzezhen.oldutils.ExcelUtils Maven / Gradle / Ivy

Go to download
package com.github.fanzezhen.oldutils;

import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;
import jxl.write.Label;
import jxl.write.WritableSheet;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;

/**
 * Created by Andy on 2018/12/20.
 * Desc:
 */
public class ExcelUtils {

    // 去读Excel的方法readExcel，该方法的入口参数为一个File对象
    public static List> readExcel(File file) {
        InputStream is = null;
        try {
            // 创建输入流，读取Excel
            is = new FileInputStream(file.getAbsolutePath());
            // jxl提供的Workbook类
            Workbook wb = Workbook.getWorkbook(is);
            // Excel的页签数量
            int sheet_size = wb.getNumberOfSheets();
//            for (int index = 0; index < sheet_size; index++) {
            List> outerList = new ArrayList<>();
            for (Sheet sheet : wb.getSheets()) {
                // 每个页签创建一个Sheet对象
//                Sheet sheet = wb.getSheet(index);
                // sheet.getRows()返回该页的总行数
                for (int i = 0; i < sheet.getRows(); i++) {
                    List innerList = new ArrayList<>();
                    // sheet.getColumns()返回该页的总列数
                    for (int j = 0; j < sheet.getColumns(); j++) {
                        String cellInfo = sheet.getCell(j, i).getContents();
//                        if (cellInfo.isEmpty()) {
//                            continue;
//                        }
                        innerList.add(cellInfo);
                    }
                    outerList.add(i, innerList);
                    System.out.println();
                }
            }
            return outerList;
        } catch (BiffException | IOException e) {
            e.printStackTrace();
        } finally {
            try {
                assert is != null;
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    /**
     * 导出excel报表
     *
     * @param res 查询到的结果集
     *            Page p=(Page)ResultList.getModel().get("page");
     *            res=p.getResult();
     * @param s   需要提取的数据列，VO中只有列出的才会被导出
     *            String[] s={"activename","partnerid"};
     * @param ws  工作表
     */
    public static void createExcel(List res, String[] s, WritableSheet ws) {

        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

        try {
            for (int i = 0; i < res.size(); i++) {
                Object obj = res.get(i);
                String resultString = "";
                Class classType = obj.getClass();
                for (int j = 0; j < s.length; j++) {
                    String fieldName = s[j];
                    String stringLetter = fieldName.substring(0, 1).toUpperCase();
                    String getName = "get" + stringLetter + fieldName.substring(1);
                    Method getMethod = classType.getMethod(getName);
                    Object value = getMethod.invoke(obj);
                    if (value == null) {
                        ws.addCell(new Label(j, i + 1, ""));
                    } else {
                        if (fieldName.toUpperCase().contains("time".toUpperCase())) {
                            ws.addCell(new Label(j, i + 1, sdf.format(value)));
                        } else {
                            ws.addCell(new Label(j, i + 1, value.toString()));
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 生成excel的标题栏
     *
     * @param s  标题列
     * @param ws 工作表
     */
    public static void createTitle(String[] s, WritableSheet ws) {

        try {
            for (int j = 0; j < s.length; j++) {
                String fieldName = s[j];
                ws.addCell(new Label(j, 0, fieldName));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void createExcelByMap(List> res, String[] s, WritableSheet ws) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            int row = 1;
            for (HashMap hashMap : res) {
                for (int j = 0; j < s.length; j++) {
                    ws.addCell(new Label(j, row, hashMap.get(s[j]) == null ? "" : hashMap.get(s[j]).toString()));
                }
                row++;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void createExcelByBean(List