用java读取Excel并依据模板图生成对应的图片

package test;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
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;

import javax.imageio.ImageIO;

public class Testpoi {

    public static void main(String[] args) {
        String a = "E:\\Desktop files\\工作文档\\pic\\photo.png";
        String b = "E:\\Desktop files\\工作文档\\test\\";
        String c = null;
        String d = null;
        String e = null;

        Workbook wb =null;
        Sheet sheet = null;
        Row row = null;
        List<Map<String,String>> list = null;
//        String cellData = null;
        String filePath = "E:\\Desktop files\\工作文档\\wps\\a.xlsx";
//        String columns[] = {"name","names","code"};
        wb = readExcel(filePath);
        if(wb != null){
            //用来存放表中数据
            list = new ArrayList<Map<String,String>>();
            //获取第一个sheet
            sheet = wb.getSheetAt(0);
            //获取最大行数
            int rownum = sheet.getPhysicalNumberOfRows();
            //获取第一行
            row = sheet.getRow(0);
            //获取最大列数
            int colnum = row.getPhysicalNumberOfCells();
//            DecimalFormat df = new DecimalFormat("0.00");
//            String whatYouWant = df.format(1234567890.666);
            for (int i = 1; i<rownum; i++) {
//                Map<String,String> map = new LinkedHashMap<String,String>();
                row = sheet.getRow(i);
                c = (String) getCellFormatValue(row.getCell(0));
                d = (String) getCellFormatValue(row.getCell(1));
                e = (String) getCellFormatValue(row.getCell(2));
                DecimalFormat df = new DecimalFormat("0");
                String code = df.format(Double.parseDouble(e));
                ImgYin(c,d,code,a,b+code+".png");
//                if(row !=null){
//                    for (int j=0;j<colnum;j++){
//                        cellData = (String) getCellFormatValue(row.getCell(j));
//                        System.out.println(cellData);
////                        map.put(columns[j], cellData);
//                    }
//                }else{
//                    break;
//                }
//                list.add(map);
            }
        }
        //遍历解析出来的list
//        for (Map<String,String> map : list) {
//            for (Entry<String,String> entry : map.entrySet()) {
//
//                System.out.print(entry.getKey()+entry.getValue()+"...");
//            }
//            System.out.println();
//        }
//        ImgYin("1111111","2222222","33333333",a,b+"1.png");
    }
    //读取excel
    public static Workbook readExcel(String filePath){
        Workbook wb = null;
        if(filePath==null){
            return null;
        }
        String extString = filePath.substring(filePath.lastIndexOf("."));
        InputStream is = null;
        try {
            is = new FileInputStream(filePath);
            if(".xls".equals(extString)){
                return wb = new HSSFWorkbook(is);
            }else if(".xlsx".equals(extString)){
                return wb = new XSSFWorkbook(is);
            }else{
                return wb = null;
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return wb;
    }
    public static Object getCellFormatValue(Cell cell){
        Object cellValue = null;
        if(cell!=null){
            //判断cell类型
            switch(cell.getCellType()){
            case Cell.CELL_TYPE_NUMERIC:{
                cellValue = String.valueOf(cell.getNumericCellValue());
                break;
            }
            case Cell.CELL_TYPE_FORMULA:{
                //判断cell是否为日期格式
                if(DateUtil.isCellDateFormatted(cell)){
                    //转换为日期格式YYYY-mm-dd
                    cellValue = cell.getDateCellValue();
                }else{
                    //数字
                    cellValue = String.valueOf(cell.getNumericCellValue());
                }
                break;
            }
            case Cell.CELL_TYPE_STRING:{
                cellValue = cell.getRichStringCellValue().getString();
                break;
            }
            default:
                cellValue = "";
            }
        }else{
            cellValue = "";
        }
        return cellValue;
    }
    public static void ImgYin(String s1, String s2,String s3, String ImgName,String outName){
        try{
            File file = new File(ImgName);
            Image src = ImageIO.read(file);
            int wideth=src.getWidth(null);
            int height=src.getHeight(null);
            BufferedImage image=new BufferedImage(wideth,height,BufferedImage.TYPE_INT_RGB);
            Graphics g=image.createGraphics();
            g.drawImage(src,0,0,wideth,height,null);
            //设置字体颜色
            g.setColor(Color.BLACK);
            //size字体大小
            g.setFont(new Font("宋体",Font.PLAIN,50));
            //wideth控制字体距离右侧边缘距离  height控制字体距离底部距离 1831   2569
            g.drawString(s1,wideth-1500,height-1250);
            g.drawString(s2,wideth-1450,height-970);
            g.drawString(s3,wideth-1150,height-970);
            g.dispose();
            FileOutputStream out=new FileOutputStream(outName);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            encoder.encode(image);
            out.close();
        }
        catch(Exception e){
            System.out.println(e);
        }
    }
}