Java图像处理工具类_java的Font类资源-CSDN文库

56 浏览量 2020-09-03 22:41:37 上传评论收藏 87KB PDF 举报

age.TYPE_INT_RGB); Graphics2D g = bufferedImage.createGraphics(); g.drawImage(image, 0, 0, null); g.dispose(); return bufferedImage; } // 缩放图像 public void scaleImage(String srcPath, String targetPath, int width, int height) throws IOException { File srcFile = new File(srcPath); Image srcImage = ImageIO.read(srcFile); BufferedImage destImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = destImage.createGraphics(); g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); g.drawImage(srcImage, 0, 0, width, height, null); g.dispose(); ImageIO.write(destImage, "jpg", new File(targetPath)); } // 切割图像 public void cutImage(String srcPath, String targetPath, int x, int y, int width, int height) throws IOException { File srcFile = new File(srcPath); Image srcImage = ImageIO.read(srcFile); BufferedImage destImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g = destImage.createGraphics(); g.drawImage(srcImage, 0, 0, width, height, x, y, x + width, y + height, null); g.dispose(); ImageIO.write(destImage, "jpg", new File(targetPath)); } // 图像类型转换 public void convertImageType(String srcPath, String targetPath, String targetType) throws IOException { File srcFile = new File(srcPath); BufferedImage srcImage = ImageIO.read(srcFile); ImageIO.write(srcImage, targetType, new File(targetPath)); } // 彩色转黑白 public void grayscaleImage(String srcPath, String targetPath) throws IOException { File srcFile = new File(srcPath); BufferedImage srcImage = ImageIO.read(srcFile); BufferedImage destImage = new BufferedImage(srcImage.getWidth(), srcImage.getHeight(), BufferedImage.TYPE_BYTE_GRAY); Graphics2D g = destImage.createGraphics(); g.drawImage(srcImage, 0, 0, null); g.dispose(); ImageIO.write(destImage, "jpg", new File(targetPath)); } // 文字水印 public void addTextWatermark(String srcPath, String targetPath, String text, Color color, int fontSize, int position) throws IOException { File srcFile = new File(srcPath); BufferedImage srcImage = ImageIO.read(srcFile); int imgWidth = srcImage.getWidth(); int imgHeight = srcImage.getHeight(); Graphics2D g = srcImage.createGraphics(); g.setColor(color); g.setFont(new Font("Arial", Font.BOLD, fontSize)); g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.5f)); switch (position) { case POSITION_UPPERLEFT: g.drawString(text, 10, fontSize); break; case POSITION_UPPERRIGHT: g.drawString(text, imgWidth - text.length() * fontSize - 10, fontSize); break; case POSITION_LOWERLEFT: g.drawString(text, 10, imgHeight - fontSize - 10); break; case POSITION_LOWERRIGHT: g.drawString(text, imgWidth - text.length() * fontSize - 10, imgHeight - fontSize - 10); break; default: g.drawString(text, imgWidth / 2 - text.length() * fontSize / 2, imgHeight - fontSize - 10); break; } g.dispose(); ImageIO.write(srcImage, "jpg", new File(targetPath)); } // 图片水印 public void addImageWatermark(String srcPath, String watermarkPath, String targetPath, int

资源推荐

资源详情

资源评论

Java图像处理工具类图像处理工具类

里给大家分享了一个java常用的图像处理工具类，包含缩放图像、切割图像、图像类型转换、彩色转黑白、文字

水印、图片水印等，有需要的小伙伴参考下。

本工具类的功能：缩放图像、切割图像、图像类型转换、彩色转黑白、文字水印、图片水印等

复制代码代码如下:

package net.kitbox.util;

import java.awt.AlphaComposite;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Image;

import java.awt.RenderingHints;

import java.awt.Toolkit;

import java.awt.color.ColorSpace;

import java.awt.image.BufferedImage;

import java.awt.image.ColorConvertOp;

import java.awt.image.CropImageFilter;

import java.awt.image.FilteredImageSource;

import java.awt.image.ImageFilter;

import java.awt.image.ImagingOpException;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import javax.imageio.ImageIO;

/**

* author:lldy

* time:2012-5-6下午6:37:18

* 图片处理工具类：<br>

* 功能：缩放图像、切割图像、图像类型转换、彩色转黑白、文字水印、图片水印等

public class ImageUtils {

/**

* 相对于图片的位置

private static final int POSITION_UPPERLEFT=0;

private static final int POSITION_UPPERRIGHT=10;

private static final int POSITION_LOWERLEFT=1;

private static final int POSITION_LOWERRIGHT=11;

/**

* 几种常见的图片格式

public static String IMAGE_TYPE_GIF = "gif";// 图形交换格式

public static String IMAGE_TYPE_JPG = "jpg";// 联合照片专家组

public static String IMAGE_TYPE_JPEG = "jpeg";// 联合照片专家组

public static String IMAGE_TYPE_BMP = "bmp";// 英文Bitmap（位图）的简写，它是Windows操作系统中的标准图像文件

格式

public static String IMAGE_TYPE_PNG = "png";// 可移植网络图形

private static ImageUtils instance;

private ImageUtils() {

instance = this;

}

/**

* 获取实例

* @return

public static ImageUtils getInstance() {

if (instance == null) {

instance = new ImageUtils();

}

return instance;

}

public BufferedImage image2BufferedImage(Image image){

System.out.println(image.getWidth(null));

System.out.println(image.getHeight(null));

BufferedImage bufferedImage = new BufferedImage(image.getWidth(null), image.getHeight(null),

BufferedImage.TYPE_INT_ARGB);

Graphics2D g = bufferedImage.createGraphics();

g.drawImage(image, null, null);

g.dispose();

System.out.println(bufferedImage.getWidth());

System.out.println(bufferedImage.getHeight());

return bufferedImage;

}

/**

* 缩放并转换格式后保存

* @param srcPath源路径

* @param destPath目标路径

* @param width：目标宽

* @param height：目标高

* @param format：文件格式

* @return

public static boolean scaleToFile(String srcPath, String destPath, int width, int height,String format) {

boolean flag = false;

try {

File file = new File(srcPath);

File destFile = new File(destPath);

if (!destFile.getParentFile().exists()) {

destFile.getParentFile().mkdir();

}

BufferedImage src = ImageIO.read(file); // 读入文件

Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT);

BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

Graphics g = tag.getGraphics();

g.drawImage(image, 0, 0, null); // 绘制缩小后的图

g.dispose();

flag = ImageIO.write(tag, format, new FileOutputStream(destFile));// 输出到文件流

} catch (IOException e) {

e.printStackTrace();

}

return flag;

}

/**

* 缩放Image，此方法返回源图像按百分比缩放后的图像

* @param inputImage

* @param percentage 百分比允许的输入0<percentage<10000

* @return

public static BufferedImage scaleByPercentage(BufferedImage inputImage,int percentage){

//允许百分比

if(0>percentage||percentage>10000){

throw new ImagingOpException("Error::不合法的参数:percentage->"+percentage+",percentage应该大于0~小于

10000");

}

//获取原始图像透明度类型

int type = inputImage.getColorModel().getTransparency();

//获取目标图像大小

int w=inputImage.getWidth()*percentage;

int h=inputImage.getHeight()*percentage;

//开启抗锯齿

RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,

RenderingHints.VALUE_ANTIALIAS_ON);

//使用高质量压缩

renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);

BufferedImage img = new BufferedImage(w, h, type);

Graphics2D graphics2d =img.createGraphics();

graphics2d.setRenderingHints(renderingHints);

graphics2d.drawImage(inputImage, 0, 0, w, h, 0, 0, inputImage

.getWidth(), inputImage.getHeight(), null);

graphics2d.dispose();

剩余10页未读，继续阅读

评论收藏

内容反馈

weixin_38673909

粉丝: 10
资源: 926

Java图像处理工具类

java图片处理工具类

java工具类：图像处理类

java图片处理类

Java图片处理开源框架Thumbnailator

java图片处理jar包

Java图片处理

Java图片处理类库SimpleImage.zip

图像处理单机版（java）-一个开源项目

Java图像处理类库 Java Image Filters

java实现图像处理小工具

java图像处理源代码

java图像处理 java图像处理java图像处理

JAVA基本数字图像处理

java图片处理工具类ImgUtils.java

JAVA图片处理

java图片处理

java图片处理工具类JAR包 java-image-scalingjar

Java图片处理工具ImageMagick

java 图像处理资源 api

java下使用opencv

png修复工具

java图片模糊工具类

16 个超级实用的 Java 工具类

java图像处理

mst.zip_java 图像处理_java图像处理_图像处理_图像处理 java

图像识别与处理Java代码.rar_java 图像处理_java图像处理_java图像识别_java源代码_图像识别

java开发常用工具类大全，程序员必备工具

java imageProcess 图像处理程序模板

最新资源