java springboot实现图片添加文字/图片水印（单个/多个）

一.Controller

 @PostMapping(value = {"/watermark"},
            produces = {MediaType.APPLICATION_JSON_UTF8_VALUE})
    public String watermark(@RequestParam("file") MultipartFile image) throws Exception {
//        MarkService markService = new TextMarkServiceImpl();  //单个文字水印
//        MarkService markService = new MoreTextServiceImpl();  //多个文字水印
//        MarkService markService = new ImgMarkServiceImpl();   //单个图片水印
        MarkService markService = new MoreImgMarkServiceImpl(); //多个图片水印
        //将上传的图片上传到项目中类路径下面
        String path = "";
        String realUploadPath = InvestInvitationInfoController.class.getClassLoader().getResource(path).getPath();
        String imageURL =uploadImage( image, path, realUploadPath );
        File imgFile=new File(realUploadPath + image.getOriginalFilename());
        //添加水印
        String watermark = markService.watermark(imgFile, image.getOriginalFilename(), path, realUploadPath);
        return watermark;
    }
    //将上传的图片上传到项目中类路径下面
	public String uploadImage(MultipartFile file, String uploadPath, String physicalUploadPath ) {

        String filePath = physicalUploadPath + file.getOriginalFilename();

        try {
            File targetFile=new File(filePath);
            FileUtils.writeByteArrayToFile(targetFile, file.getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }
        return uploadPath + "/" + file.getOriginalFilename();
    }

二.Service

import java.awt.*;
import java.io.File;

public interface MarkService {
    public static final String MARK_TEXT="LMS";  //字体水印
    public static final String FONT_NAME="微软雅黑";
    public static final int FONT_STYLE= Font.BOLD;
    public static final int FONT_SIZE=20;
    public static final Color FONT_COLOR=Color.BLACK;
    public static final  int X=10;
    public static final int Y=10;
    public static final float ALPHA=0.3f;  //透明度
    public static final String LOGO="mimi.jpg";  //图片水印，提前保存在类路径下的图片
    public String watermark(File img, String imgName, String imgpath, String realImgPath);
}

三.ServiceImpl
（一）单个文字水印

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;


public class MarkServiceImpl implements MarkService {
    public static final String MARK_TEXT = "LM