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Java POI 实现Excel相同数据同一颜色,不同数据颜色交替显示

时间:2019-04-18 17:15:04      阅读:194      评论:0      收藏:0      [点我收藏+]

标签:book   文件   count   避免   log4   exception   package   ali   center   

1、效果图

技术图片

2、具体代码实现

excel 读取工具类

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

import org.apache.log4j.Logger;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;  
/** 
 * excel读写工具类 */  
public class POIUtil2 {  
    private static Logger logger  = Logger.getLogger(POIUtil2.class);  
    private final static String xls = "xls";  
    private final static String xlsx = "xlsx";  
      
    /** 
     * 读入excel文件,解析后返回 
     * @param file 
     * @throws IOException  
     */  
    public static List<String[]> readExcel(File file) throws IOException{  
        //检查文件  
        checkFile(file);  
        //获得Workbook工作薄对象  
        Workbook workbook = getWorkBook(file);  
        //创建返回对象,把每行中的值作为一个数组,所有行作为一个集合返回  
        List<String[]> list = new ArrayList<String[]>();  
        if(workbook != null){  
            for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){  
                //获得当前sheet工作表  
                Sheet sheet = workbook.getSheetAt(sheetNum);  
                if(sheet == null){  
                    continue;  
                }  
                //获得当前sheet的开始行  
                int firstRowNum  = sheet.getFirstRowNum();  
                //获得当前sheet的结束行  
                int lastRowNum = sheet.getLastRowNum();  
                //循环除了第一行的所有行  
//                for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){  
                for(int rowNum = firstRowNum;rowNum <= lastRowNum;rowNum++){  
                    //获得当前行  
                    Row row = sheet.getRow(rowNum);  
                    if(row == null){  
                        continue;  
                    }  
                    //获得当前行的开始列  
                    int firstCellNum = row.getFirstCellNum();  
                    //获得当前行的列数  
                    int lastCellNum = row.getPhysicalNumberOfCells();  
                    String[] cells = new String[row.getPhysicalNumberOfCells()];  
                    //循环当前行  
                    for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){  
                        Cell cell = row.getCell(cellNum);  
                        cells[cellNum] = getCellValue(cell);  
                    }  
                    list.add(cells);  
                }  
            }  
            workbook.close();  
        }  
        return list;  
    }  
    public static void checkFile(File file) throws IOException{  
        //判断文件是否存在  
        if(null == file){  
            logger.error("文件不存在!");  
            throw new FileNotFoundException("文件不存在!");  
        }  
        //获得文件名  
        String fileName = file.getName();  
        //判断文件是否是excel文件  
        if(!fileName.endsWith(xls) && !fileName.endsWith(xlsx)){  
            logger.error(fileName + "不是excel文件");  
            throw new IOException(fileName + "不是excel文件");  
        }  
    }  
    public static Workbook getWorkBook(File file) {  
        //获得文件名  
        String fileName = file.getName();  
        //创建Workbook工作薄对象,表示整个excel  
        Workbook workbook = null;  
        try {  
            //获取excel文件的io流  
            InputStream is = new FileInputStream(file);  
            //根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象  
            if(fileName.endsWith(xls)){  
                //2003  
                workbook = new HSSFWorkbook(is);  
            }else if(fileName.endsWith(xlsx)){  
                //2007  
                workbook = new XSSFWorkbook(is);  
            }  
        } catch (IOException e) {  
            logger.info(e.getMessage());  
        }  
        return workbook;  
    }  
    public static String getCellValue(Cell cell){  
        String cellValue = "";  
        if(cell == null){  
            return cellValue;  
        }  
        //把数字当成String来读,避免出现1读成1.0的情况  
        if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){  
            cell.setCellType(Cell.CELL_TYPE_STRING);  
        }  
        //判断数据的类型  
        switch (cell.getCellType()){  
            case Cell.CELL_TYPE_NUMERIC: //数字  
                cellValue = String.valueOf(cell.getNumericCellValue());  
                break;  
            case Cell.CELL_TYPE_STRING: //字符串  
                cellValue = String.valueOf(cell.getStringCellValue());  
                break;  
            case Cell.CELL_TYPE_BOOLEAN: //Boolean  
                cellValue = String.valueOf(cell.getBooleanCellValue());  
                break;  
            case Cell.CELL_TYPE_FORMULA: //公式  
                cellValue = String.valueOf(cell.getCellFormula());  
                break;  
            case Cell.CELL_TYPE_BLANK: //空值   
                cellValue = "";  
                break;  
            case Cell.CELL_TYPE_ERROR: //故障  
                cellValue = "非法字符";  
                break;  
            default:  
                cellValue = "未知类型";  
                break;  
        }  
        return cellValue;  
    }  
}

excel写入和测试类

package test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.junit.Test;

import pojo.ReadEntity;
import utils.POIUtil2;

public class readTest {

    @Test
    public void test() {
        try {
            // 创建一个Excel对象
            XSSFWorkbook wb = new XSSFWorkbook();
            // 创建表单Sheet对象
            XSSFSheet sheet = wb.createSheet();
            XSSFCellStyle style = null;
            XSSFCellStyle style1 = getCellStyle(wb, HSSFColor.GREEN.index);
            XSSFCellStyle style2 = getCellStyle(wb, HSSFColor.LIGHT_YELLOW.index);
            XSSFCellStyle style3 = getCellStyle(wb, HSSFColor.SKY_BLUE.index);
            XSSFCellStyle style4 = getCellStyle(wb, HSSFColor.LIGHT_ORANGE.index);

            sheet.setColumnWidth(0, 10000); //设置第一列列宽:
            sheet.setColumnWidth(1, 10000); //设置第二列列宽:
            sheet.setColumnWidth(2, 10000); //设置列宽:
            sheet.setColumnWidth(3, 10000); //设置列宽:
            sheet.setColumnWidth(4, 10000); //设置列宽:
            
            int count = 0;
            int rowNum = 0; //行
            
            Map<String, List<ReadEntity>> map = getData();
            for (Entry<String, List<ReadEntity>> entry : map.entrySet()) {
                //判断相同数据用同一种背景颜色,四种背景颜色交替显示
                if (count % 4 == 0) {
                    style = style1;
                } else if (count % 4 == 1) {
                    style = style2;
                } else if (count % 3 == 2) {
                    style = style3;
                } else {
                    style = style4;
                }
                List<ReadEntity> value = entry.getValue();
                for (ReadEntity temp : value) {
                    //创建行
                    XSSFRow row = sheet.createRow(rowNum);
//                  创建单元格,此处设置了5列
                    XSSFCell cell1 = row.createCell(0);
                    cell1.setCellValue(temp.getTableName());
                    cell1.setCellStyle(style);
                    XSSFCell cell2 = row.createCell(1);
                    cell2.setCellValue(temp.getTableRemark());
                    cell2.setCellStyle(style);
                    XSSFCell cell3 = row.createCell(2);
                    cell3.setCellValue(temp.getField());
                    cell3.setCellStyle(style);
                    XSSFCell cell4 = row.createCell(3);
                    cell4.setCellValue(temp.getFieldRemark());
                    cell4.setCellStyle(style);
                    XSSFCell cell5 = row.createCell(4);
                    cell5.setCellValue(temp.getFieldType());
                    cell5.setCellStyle(style);
                    rowNum++;
                }
                count++;
            }
            //写出数据文件
            File file = new File("D:/table2.xlsx");
            if (!file.exists()) {
                file.createNewFile();
            }
            // 输出文件
            FileOutputStream output = new FileOutputStream(file);
            wb.write(output);
            output.flush();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    /**
     * 获取本地导入数据
     * @return
     * @throws IOException
     */
    private Map<String, List<ReadEntity>> getData() throws IOException {
        File file = new File("D:/table.xlsx");
        List<String[]> list = POIUtil2.readExcel(file);
        Map<String, List<ReadEntity>> map = new LinkedHashMap<>();
        Set<String> set = new HashSet<>();
        List<ReadEntity> entites = null;
        for (String[] strArr : list) {
            if (set.add(strArr[0])) {
                entites = new ArrayList<>();
                map.put(strArr[0], entites);
            }
            ReadEntity entity = new ReadEntity();
            entity.setTableName(strArr[0]);
            entity.setTableRemark(strArr[1]);
            entity.setField(strArr[2]);
            entity.setFieldRemark(strArr[3]);
            entity.setFieldType(strArr[4]);
            entites.add(entity);
        }
        return map;
    }

    

    /**
     * 得到不同颜色的style样式
     * @param wb
     * @param color
     * @return
     */
    public XSSFCellStyle getCellStyle(XSSFWorkbook wb, Short color) {
        XSSFCellStyle style = wb.createCellStyle();
        //注意这两个属性同时设置才能起作用
//      style.setFillForegroundColor(color);// 设置背景色
//      style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        style.setFillForegroundColor(color);// 设置背景色
        style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        
        style.setBorderBottom(HSSFCellStyle.BORDER_THIN); // 下边框
        style.setBorderLeft(HSSFCellStyle.BORDER_THIN);// 左边框
        style.setBorderTop(HSSFCellStyle.BORDER_THIN);// 上边框
        style.setBorderRight(HSSFCellStyle.BORDER_THIN);// 右边框
//      style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 居中

        XSSFFont font = wb.createFont();
        font.setFontName("仿宋_GB2312");
//      font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 粗体显示
        font.setFontHeightInPoints((short) 12); // 字体大小
        style.setFont(font);// 选择需要用到的字体格式
        return style;
    }

}

Java POI 实现Excel相同数据同一颜色,不同数据颜色交替显示

标签:book   文件   count   避免   log4   exception   package   ali   center   

原文地址:https://www.cnblogs.com/ygzone/p/10730297.html

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