java利用水印往图片中添加文字，以及文字进行描边的两种实现方式

最近自在做个项目，需要使用到水印图片，以及java文字描边，网上查找资料都七零八落，不太直观，也比较难找到自己想要的东西，下面就是自己整合成功的demo以及上传部分的代码

package com.osa.platform.constant;

import java.awt.AlphaComposite;

import java.awt.BasicStroke;

import java.awt.Color;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.RenderingHints;

import java.awt.Shape;

import java.awt.font.FontRenderContext;

import java.awt.font.TextLayout;

import java.awt.geom.AffineTransform;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

 

import javax.imageio.ImageIO;

 

public class ImageUtils {

 

public static void main(String[] args) throws IOException {

 

String inputImagePath = "/Users/eko/Documents/hb.png";

String outputPath = "/Users/eko/Documents/hb1.png";

String text = "0.60元红包";

System.err.println(text.length());

addTextToImage(inputImagePath, outputPath, text, new Color(231, 65, 51));

}

 

public static void addTextToImage(String inputImagePath,String outputPath,String text,Color color) throws IOException{

File file = new File(inputImagePath);

Image image = ImageIO.read(file);

BufferedImage bi = new BufferedImage(image.getWidth(null),image.getHeight(null),BufferedImage.TYPE_INT_ARGB);

System.err.println(bi.getWidth());

float alpha = 1F;

Graphics2D g2 =  bi.createGraphics();

//高清代码

g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);

g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);

g2.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);

AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);

    g2.setComposite(ac);

g2.drawImage(image, 0, 0, image.getWidth(null), image.getHeight(null), null);

g2.setColor(color);

g2.setBackground(Color.BLACK);

Font font = new Font("微软雅黑",Font.BOLD,18);

g2.setFont(font);

FontRenderContext frc = g2.getFontRenderContext();

        TextLayout tl = new TextLayout(text, font, frc);

        FontMetrics fm = sun.font.FontDesignMetrics.getMetrics(font);

        int stringWidth = fm.stringWidth(text);

        Shape sha = tl.getOutline(AffineTransform.getTranslateInstance((bi.getWidth()-stringWidth)/2,115));

        //字体色

        g2.setColor(Color.red);

        g2.draw(sha);

        //描边色

        g2.setColor(Color.white);

        g2.fill(sha);

ImageIO.write(bi, "PNG", new FileOutputStream(outputPath));

}

}

结果如下：

                                  

//2.水印的纯文字拼接，不带描边的实现

package com.osa.platform.constant;

import java.awt.AlphaComposite;

import java.awt.Color;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

 

import javax.imageio.ImageIO;

 

public class ImageUtils {

 

public static void main(String[] args) throws IOException {

 

String inputImagePath = "/Users/eko/Documents/hb.png";

String outputPath = "/Users/eko/Documents/hb1.png";

String text = "88元红包";

System.err.println(text.length());

addTextToImage(inputImagePath, outputPath, text, new Color(231, 65, 51));

}

 

public static void addTextToImage(String inputImagePath,String outputPath,String text,Color color) throws IOException{

File file = new File(inputImagePath);

Image image = ImageIO.read(file);

BufferedImage bi = new BufferedImage(image.getWidth(null),image.getHeight(null),BufferedImage.TYPE_INT_ARGB);

float alpha = 1F;

Graphics2D g2 =  bi.createGraphics();

AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);

    g2.setComposite(ac);

g2.drawImage(image, 0, 0, image.getWidth(null), image.getHeight(null), null);

g2.setColor(color);

g2.setBackground(Color.BLACK);

Font font = new Font("微软雅黑",Font.BOLD,18);

g2.setFont(font);

FontMetrics fm = sun.font.FontDesignMetrics.getMetrics(font);

int stringWidth = fm.stringWidth(text);

g2.drawString(text, (image.getWidth(null)-stringWidth)/2, 115);

g2.dispose();

ImageIO.write(bi, "PNG", new FileOutputStream(outputPath));

}

}

效果如下：

                                              

 

 

 

上传图片部分代码：

package com.osa.platform.service;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import com.osa.global.utils.DoHttp;
import com.osa.platform.utils.BaseResponse;
import com.osa.platform.utils.ConfigUtils;
import com.osa.platform.utils.FtpUpload;
import com.osa.platform.utils.HTTPSentUtils;
import com.osa.platform.utils.OsaResult;
import com.osa.platform.utils.utils.Common;
/**
 * 红包图片加上水印文字
 * @author eko
 *
 */
@Service
public class ImageService {
    private static final Logger LOGGER=LoggerFactory.getLogger(ImageService.class);
    /**    
     * 给图片添加“图片水印”、可设置图片水印旋转角度    
     * @param srcImgPath 源图片路径    
     */    
    public String markImageByText(HttpServletResponse response,String sourceUrl,String prizeName) {   
        String srcUrl=ConfigUtils.getConfig("image.server");
        OutputStream os = null;   
        ByteArrayOutputStream bos=null;
        try {   
            //1、源图片  
            String url=srcUrl+sourceUrl;
            byte[] imgByte = getImgByte(url);
            if(imgByte==null){
                return null; 
            }
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(imgByte);
            Image srcImg = ImageIO.read(byteArrayInputStream);  
            BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),srcImg.getHeight(null),BufferedImage.TYPE_INT_ARGB);
            float alpha = 1F;
            Graphics2D g2 =  buffImg.createGraphics();
             AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);
            g2.setComposite(ac);
            g2.drawImage(srcImg, 0, 0, srcImg.getWidth(null), srcImg.getHeight(null), null);
            Color color= new Color(231, 65, 51);
            g2.setColor(color);
            g2.setBackground(Color.BLACK);
             Font font = new Font("微软雅黑",Font.BOLD,18);
            g2.setFont(font);
            FontMetrics fm = sun.font.FontDesignMetrics.getMetrics(font);
            int stringWidth = fm.stringWidth(prizeName);
            g2.drawString(prizeName, (srcImg.getWidth(null)-stringWidth)/2, 115);
            g2.dispose();
            File directory = new File("");// 参数为空
            String realPath = directory.getCanonicalPath();
            String mbFilePath=realPath+File.separator+"src"+File.separator+"main"+File.separator+"resources"+File.separator+"static"+File.separator+"temp"+"hbSY.png";
            //5、生成图片   
            os=new FileOutputStream(new File(mbFilePath));
            ImageIO.write(buffImg,"png",os);  
            bos = new ByteArrayOutputStream();  
            ImageIO.write(buffImg,"png",bos); 
            final InputStream is = new ByteArrayInputStream(bos.toByteArray()); 
            String filePath = Common.getFilePath();
            filePath="/temp"+filePath;
            BaseResponse osa;
                    try {
                        osa = FtpUpload.getUploadResult(is, false,"hbSY.png",filePath);
                        if(osa.getStatus()==200){
                            Map map=(Map) osa.getData();
                            String imgUrl = map.get("keyUrl");
                            return imgUrl;
                        }
                    } catch (IOException e) {
                        LOGGER.error("红包图片生成异常,{}",e);
                    }
        } catch (Exception e) {     
            LOGGER.error("红包图片生成异常,{}",e);
        } finally {
            IOUtils.closeQuietly(os);
            IOUtils.closeQuietly(bos);
        }
        return null;     
    }
    public byte[] getImgByte(String url){
        if(StringUtils.isBlank(url)){
            return null;
        }
        url=getUrl(url);
        byte[] imgByte = HTTPSentUtils.doGet(url);
        return imgByte;
    }
    private String getUrl(String url){
        int last = url.lastIndexOf("/");
        String pre = url.substring(0, last+1);
        String name = url.substring(last+1);
        try {
            name = URLEncoder.encode(name,"UTF-8");
        } catch (UnsupportedEncodingException e) {
            LOGGER.error("编码失败,{}",e);
        }
        url=pre+name;
        return url;
    }
}