ImgUtil文字logo位置

类

package io01;

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import javax.imageio.ImageIO;

public class ImgUtil {
    private String img = "";
    private String name = "";
    private String ext = "";
    private int width = 0;
    private int height = 0;
    private Random rand = new Random();
    private BufferedImage i;//缓冲图像
    private Graphics2D g;
    private Font font = new Font("", Font.BOLD, 35);

    public ImgUtil() {

    }

    public ImgUtil(String img) {
        this.setImg(img);
    }

    public ImgUtil(File img) {
        this.setImg(img.getAbsolutePath());
    }
　　//生成缩略图，宽高，是否毁掉原图
    public void thumb(int width, int height, boolean flag) {
        BufferedImage dst = new BufferedImage(width, height, 1);
        Graphics2D g = dst.createGraphics();
        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_GASP);
        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_DEFAULT);
        g.drawImage(this.i, 0, 0, width, height, null);//绘制图像
        g.dispose();

        String nn = name + String.format("_ok(%d_%d).", width, height) + ext;

        try {
            if (flag) {　　　　　　//图像格式，new
                ImageIO.write(dst, this.ext, new File(this.img));
            } else {//名字
                ImageIO.write(dst, this.ext, new File(nn));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    public void logo(File logo, int pos, boolean flag) {
                    //放哪，是否覆盖
        try {
            BufferedImage log = ImageIO.read(logo);//缓冲图像
            int lw = log.getWidth();//获取logo的宽度
            int lh = log.getHeight();
            int x = 0, y = 0;//初始坐标
            switch (pos) {
                case 1:
                    x = 30;
                    y = 30;
                    break;
                case 2:
                    x = 0;
                    y = 0;
                    break;
                case 3:
                    x = 0;
                    y = 0;
                    break;
                case 4:
                    x = 0;
                    y = 0;
                    break;
                case 5:
                    x = (int) ((this.width - lw) / 2.0);
                    y = (int) ((this.height - lh) / 2.0);
                    break;
                case 6:
                    x = 0;
                    y = 0;
                    break;
                case 7:
                    x = 0;
                    y = 0;
                    break;
                case 8:
                    x = (int) ((this.width - lw) / 2.0);
                    y = this.height - lh - 30;
                    break;
                case 9:
                    x = this.width - lw - 30;
                    y = this.height - lh - 30;
                    break;
                default:
                    x = rand.nextInt(this.width - lw) + 30;
                    y = rand.nextInt(this.height - lh) + 30;
                    break;
            }
            //水印透明，f类型
            this.g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, .5f));
            // 原始大小水印图标效果
             this.g.drawImage(log, x, y, null);
            // 改变大小水印图标效果
            //this.g.drawImage(log, x, y, lw - 50, lh - 10, null);
　　　　　　　　　　　　　　　　　　　//xy 坐标， lwlh宽高，路径
            this.g.dispose();
            this.save(flag, "_logo");
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public void text(String text) {
        text(text, 30, 5, true);
    }

    /**
     * @param text
     * @param fontSize
     * @param pos
     * @param flag
     */
    public void text(String text, float fontSize, int pos, boolean flag) {
        g.setColor(new Color(255, 0, 0, 180));
        try {
            Font font =new Font("宋体",Font.BOLD,60);
        } catch (Exception e) {

        }
        font = font.deriveFont(fontSize);
        font = font.deriveFont(Font.BOLD);
        g.setFont(font);
        FontMetrics fm = g.getFontMetrics(font);
        int tw = fm.stringWidth(text);
        int th = fm.getHeight();
        int x = 0;
        int y = 0;
        switch (pos) {
            case 1:
                x = 30;
                y = th + 20;
                break;

            case 2:
                break;
            case 3:
                break;
            case 4:
                break;
            case 5:
                x = (int) ((this.width - tw) / 2.0);
                y = (int) ((this.height - th) / 2.0);
                break;
            case 6:
                break;
            case 7:
                break;
            case 8:
                break;
            case 9:
                x = this.width - 30 - tw;
                y = this.height - 30;
                break;
            default:
                x = rand.nextInt(this.width - 30 - tw) + 30;
                y = rand.nextInt(this.height - th - 10) + th + 10;
                break;
        }
        g.drawString(text, x, y);
        g.dispose();
        this.save(flag, "_text");

    }

    //保存
    public void save(boolean flag, String txt) {//String txt "."设置自定义后缀
        try {
            if (flag) {
                ImageIO.write(this.i, this.ext, new File(this.img));
            } else {
                ImageIO.write(this.i, this.ext, new File(this.name + txt + "." + this.ext));//_text+
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public int getWidth() {
        return width;
    }

    public void setWidth(int width) {
        this.width = width;
    }

    public int getHeight() {
        return height;
    }

    public void setHeight(int height) {
        this.height = height;
    }

    public String getImg() {
        return img;
    }

    public void setImg(String img) {
        this.img = img;
        this.name = this.img.substring(0, this.img.lastIndexOf("."));
        this.ext = this.img.substring(this.img.lastIndexOf(".") + 1);
        try {
            i = ImageIO.read(new File(this.img));
            this.width = i.getWidth();
            this.height = i.getHeight();
            this.g = i.createGraphics();
            g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_GASP);
            g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_DEFAULT);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getExt() {
        return ext;
    }

    public void setExt(String ext) {
        this.ext = ext;
    }

    public void info() {
        List<String> in = new ArrayList<>();
        in.add(this.img);
        in.add(this.ext);
        in.add("" + this.width);
        in.add("" + this.height);
        System.out.println(in);
    }

}

使用

 public static void main(String[] args) {
   ImgUtil iu = new ImgUtil("d:/Auser/2.png");
//   iu.text(String.format("%1$tF %1$tT",System.currentTimeMillis()),30,5,false);
     iu.text(String.format("你说你"),30,5,false);

//水印图像
//     ImgUtil iu = new ImgUtil("d:/Auser/2.png");
//        iu.logo(new File("d:/Auser/log.jpg"),9,false);
 
//缩略图
ImgUtil iu =new ImgUtil("d:/Auser/2.png");

iu.thumb(400,400,false);
iu.thumb(350,350,false);
iu.thumb(150,150,false);
}