【JAVA】图片生成工具类

package com.XXX.utils.image;

package com.hlf.vpos.common.utils.image;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ImageUtil {
    // 宽度
    private static final int WIDTH = 450;
    // 高度
    private static final int HEIGHT = 400;
    // 双字节字符字体大小
    private static final int DOUBLE_FONT_SIZE = 15;
    // 单字节字符字体大小
    private static final int SINGLE_FONT_SIZE = 8;
    // 行间距
    private static final int LINE_HEIGHT = 30;
    // 水印透明度
    private static float alpha = 1.0f;
    // 水印横向位置
    private static int positionWidth = 53;
    // 水印纵向位置
    private static int positionHeight = 317;
    // 水印文字字体
    private static Font font = new Font("宋体", Font.BOLD, 115);
    // 水印文字颜色
    private static Color color = new Color(230, 230, 230);
    /**
     * 生成图片
     * @throws IOException
     */
    public static void createImage(String[] strList, int[] sizes, String basePath, String targetPath) throws IOException {
        OutputStream os = null;
        // 1.创建空白图片
        BufferedImage image = new BufferedImage(
                WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
        // 2.获取图片画笔
        Graphics graphic = image.getGraphics();
        // 3.设置画笔颜色
        graphic.setColor(Color.white);
        // 4.绘制矩形背景
        graphic.fillRect(0, 0, WIDTH, HEIGHT);
        // 5.绘制矩形边框
        graphic.setColor(Color.lightGray);
        graphic.drawRect(0, 0, WIDTH-1, HEIGHT-1);

        /**
         * strList:字符串数组,里面存储的是需要显示的文字,每个元素换行显示
         * sizes:长度数组,对应上面的字符串数组,对于每个字符串,记录标题长度,需要加粗显示
         */
        int height = 0;//记录文字行数
        int sumLength = 0;
        String regex = "[^\\x00-\\xff]";//匹配双字节字符
        Matcher matcher = null;
        Pattern pattern = Pattern.compile(regex);
        boolean rs = false;//记录当前字符的匹配情况
        boolean flag = false;//记录前一字符的匹配情况
        for(int j = 0; j WIDTH - DOUBLE_FONT_SIZE*2){
                    //每一行的前后都要留有一定空白,横坐标已经超出长度,需要折行
                    height = height + 1;
                    if(rs){ //前面是双字节字符,横坐标设置为15
                        sumLength = DOUBLE_FONT_SIZE;
                    }else{  //前面是单字节字符,横坐标设置为8
                        sumLength = SINGLE_FONT_SIZE;
                    }
                }
                // 画字符
                graphic.drawString(schar, sumLength, height*LINE_HEIGHT);
            }
        }
        // 6.返回图片
        os = new FileOutputStream(targetPath);
        ImageIO.write(image, "JPG", os);
        os.close();

        System.out.println("返回图片。。。。。。");
    }

    //添加文字水印
    public static void markImageByText(String logoText, String srcImgPath,
                                       String targerPath, Integer degree) {

        InputStream is = null;
        OutputStream os = null;
        try {
            // 1、源图片
            Image srcImg = ImageIO.read(new File(srcImgPath));
            BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);

            // 2、得到画笔对象
            Graphics2D g = buffImg.createGraphics();
            // 3、设置对线段的锯齿状边缘处理
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg.getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);
            // 4、设置水印旋转
            if (null != degree) {
                g.rotate(Math.toRadians(degree),(double) buffImg.getWidth() / 2, (double) buffImg.getHeight() / 2);
            }
            // 5、设置水印文字颜色
            g.setColor(color);
            // 6、设置水印文字Font
            g.setFont(font);
            // 7、设置水印文字透明度
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,alpha));
            // 8、第一参数->设置的内容,后面两个参数->文字在图片上的坐标位置(x,y)
            g.drawString(logoText, positionWidth, positionHeight);
            // 9、释放资源
            g.dispose();
            // 10、生成图片
            os = new FileOutputStream(targerPath);
            ImageIO.write(buffImg, "JPG", os);

            System.out.println("图片完成添加水印文字");

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != is)
                    is.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
            try {
                if (null != os)
                    os.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    //添加图片水印
    public static void markImageByIcon(String iconPath, String srcImgPath,
                                       String targerPath, Integer degree) {
        OutputStream os = null;
        try {
            Image srcImg = ImageIO.read(new File(srcImgPath));

            BufferedImage buffImg = new BufferedImage(srcImg.getWidth(null),
                    srcImg.getHeight(null), BufferedImage.TYPE_INT_RGB);

            // 得到画笔对象
            Graphics2D g = buffImg.createGraphics();

            // 设置对线段的锯齿状边缘处理
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                    RenderingHints.VALUE_INTERPOLATION_BILINEAR);

            g.drawImage(srcImg.getScaledInstance(srcImg.getWidth(null), srcImg
                    .getHeight(null), Image.SCALE_SMOOTH), 0, 0, null);

            if (null != degree) {
                // 设置水印旋转
                g.rotate(Math.toRadians(degree),
                        (double) buffImg.getWidth() / 2, (double) buffImg
                                .getHeight() / 2);
            }

            // 水印图象的路径 水印一般为gif或者png的,这样可设置透明度
            ImageIcon imgIcon = new ImageIcon(iconPath);

            // 得到Image对象。
            Image img = imgIcon.getImage();


            //float alpha = 0.1f; // 透明度
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                    alpha));

            // 表示水印图片的位置
            g.drawImage(img, positionWidth-1, positionHeight-1, null);

            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER));

            g.dispose();

            os = new FileOutputStream(targerPath);

            // 生成图片
            ImageIO.write(buffImg, "JPG", os);

            System.out.println("图片完成添加Icon印章。。。。。。");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != os)
                    os.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        String[] contents = new String[4];
        contents[0] = "姓名:张三";
        contents[1] = "性别:男";
        contents[2] = "出生年月:1988-01";
        contents[3] = "个人经历:1995年9月进入XXX小学,2000年9月进入某中学,2003年顺利升入本市高中,2006年考入某一本大学成为一名大学生,2010年考入北京一所大学成为一名研究生,2013年顺利毕业进入职场。";
        int[] sizes = new int[24];
        sizes[0] = 6;
        sizes[1] = 11;
        sizes[2] = 5;
        sizes[3] = 5;
        try {
            createImage(contents, sizes,
                    "e:/test/createImage.jpg",
                    "e:/test/createImage.jpg");
        } catch (IOException e) {
            e.printStackTrace();
        }

        //markImageByText("测试水印","e:/test/createImage.jpg","e:/test/createImage_text.jpg",90);

        markImageByIcon("e:/test/test.jpg",
                "e:/test/createImage.jpg", "e:/test/createImage.jpg", 0);
    }

}

参考出处:http://www.zhimengzhe.com/bianchengjiaocheng/Javabiancheng/321738.html

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