package com.opslab.util.image;
import com.opslab.util.FileUtil;
import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import java.awt.*;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
import java.io.*;
import java.util.Iterator;
import java.util.List;
/**
* 图片相关的操作
* @author adam.胡升阳
*/
public final class OperateImage {
// 图形交换格式
public static String IMAGE_TYPE_GIF = "gif";
// 联合照片专家组
public static String IMAGE_TYPE_JPG = "jpg";
// 联合照片专家组
public static String IMAGE_TYPE_JPEG = "jpeg";
// 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_BMP = "bmp";
// 可移植网络图形
public static String IMAGE_TYPE_PNG = "png";
// Photoshop的专用格式Photoshop
public static String IMAGE_TYPE_PSD = "psd";
/**
* 对图片裁剪，并把裁剪新图片保存
*
* @param srcPath 读取源图片路径
* @param toPath 写入图片路径
* @param x 剪切起始点x坐标
* @param y 剪切起始点y坐标
* @param width 剪切宽度
* @param height 剪切高度
* @param readImageFormat 读取图片格式
* @param writeImageFormat 写入图片格式
* @throws IOException
*/
public static void cropImage(String srcPath, String toPath,
int x, int y, int width, int height,
String readImageFormat, String writeImageFormat) throws IOException {
try(
FileInputStream fis =new FileInputStream(srcPath);
ImageInputStream iis = ImageIO.createImageInputStream(fis)
) {
Iterator it = ImageIO.getImageReadersByFormatName(readImageFormat);
ImageReader reader = (ImageReader) it.next();
//获取图片流
reader.setInput(iis, true);
ImageReadParam param = reader.getDefaultReadParam();
//定义一个矩形
Rectangle rect = new Rectangle(x, y, width, height);
//提供一个 BufferedImage，将其用作解码像素数据的目标。
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param);
//保存新图片
ImageIO.write(bi, writeImageFormat, new File(toPath));
}catch (IOException e){
e.printStackTrace();
throw e;
}
}
/**
* 按倍率缩小图片
*
* @param srcImagePath 读取图片路径
* @param toImagePath 写入图片路径
* @param widthRatio 宽度缩小比例
* @param heightRatio 高度缩小比例
* @throws IOException
*/
public static void reduceImageByRatio(String srcImagePath, String toImagePath, int widthRatio, int heightRatio) throws IOException {
File file = new File(srcImagePath);
try(FileOutputStream out = new FileOutputStream(toImagePath)) {
//读入文件
String prefix= FileUtil.suffix(file);
// 构造Image对象
BufferedImage srcBuffer = ImageIO.read(file);
// 按比例缩减图像
BufferedImage imageBuffer = ImageUtil.imageShrinkRatio(srcBuffer, widthRatio, heightRatio);
ImageIO.write(imageBuffer,prefix,out);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 长高等比例缩小图片
*
* @param srcImagePath 读取图片路径
* @param toImagePath 写入图片路径
* @param ratio 缩小比例
* @throws IOException
*/
public static void reduceImageEqualProportion(String srcImagePath, String toImagePath, int ratio) throws IOException {
File file = new File(srcImagePath);
try(FileOutputStream out = new FileOutputStream(toImagePath)) {
//读入文件
String prefix= FileUtil.suffix(file);
// 构造Image对象
BufferedImage srcBuffer = ImageIO.read(file);
// 按比例缩减图像
BufferedImage imageBuffer = ImageUtil.imageShrinkRatio(srcBuffer, ratio, ratio);
ImageIO.write(imageBuffer,prefix,out);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 按倍率放大图片
*
* @param srcImagePath 读取图形路径
* @param toImagePath 写入入行路径
* @param widthRatio 宽度放大比例
* @param heightRatio 高度放大比例
* @throws IOException
*/
public static void enlargementImageByRatio(String srcImagePath, String toImagePath, int widthRatio, int heightRatio) throws IOException {
File file = new File(srcImagePath);
try(FileOutputStream out = new FileOutputStream(toImagePath)) {
//读入文件
String prefix= FileUtil.suffix(file);
// 构造Image对象
BufferedImage srcBuffer = ImageIO.read(file);
// 按比例缩减图像
BufferedImage imageBuffer = ImageUtil.imageMagnifyRatio(srcBuffer, widthRatio, heightRatio);
ImageIO.write(imageBuffer, prefix, out);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 长高等比例放大图片
*
* @param srcImagePath 读取图形路径
* @param toImagePath 写入入行路径
* @param ratio 放大比例
* @throws IOException
*/
public static void enlargementImageEqualProportion(String srcImagePath, String toImagePath, int ratio) throws IOException {
File file = new File(srcImagePath);
try(FileOutputStream out = new FileOutputStream(toImagePath)) {
//读入文件
String prefix= FileUtil.suffix(file);
// 构造Image对象
BufferedImage srcBuffer = ImageIO.read(file);
// 按比例缩减图像
BufferedImage imageBuffer = ImageUtil.imageMagnifyRatio(srcBuffer, ratio, ratio);
ImageIO.write(imageBuffer, prefix, out);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 重置图形的边长大小
*
* @param srcImagePath 原图像
* @param toImagePath 新生产的图像
* @param width 图像宽度
* @param height 图像高度
* @throws IOException
*/
public static void resizeImage(String srcImagePath, String toImagePath, int width, int height) throws IOException {
File file = new File(srcImagePath);
try(FileOutputStream out = new FileOutputStream(toImagePath)) {
//读入文件
String prefix= FileUtil.suffix(file);
// 构造Image对象
BufferedImage srcBuffer = ImageIO.read(file);
// 按比例缩减图像
BufferedImage imageBuffer = ImageUtil.imageResize(srcBuffer, width, height);
ImageIO.write(imageBuffer, prefix, out);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 横向拼接图片（两张）
*
* @param firstSrcImagePath 第一张图片的路径
* @param secondSrcImagePath 第二张图片的路径
* @param imageFormat 拼接生成图片的格式
* @param toPath 拼接生成图片的路径
* 要拼接的俩张图片尺寸要一致
*/
public static void joinImagesHorizontal(String firstSrcImagePath, String secondSrcImagePath, String imageFormat, String toPath) {
try {
//读取第一张图片
File fileOne = new File(firstSrcImagePath);
BufferedImage imageOne = ImageIO.read(fileOne);
int width = imageOne.getWidth();//图片宽度
int height = imageOne.getHeight();//图片高度
//从图片中读取RGB
int[] imageArrayOne = new int[width * height];
imageArrayOne = imageOne.getRGB(0, 0, width, height, imageArrayOne, 0, width);
//对第二张图片做相同的处理
File fileTwo = new File(secondSrcImagePath);
BufferedImage imageTwo = ImageIO.read(fileTwo);
int width2 = imageTwo.getWidth();
int height2 = imageTwo.getHeight();
int[] ImageArrayTwo = new int[width2 * height2];
ImageArrayTwo = imageTwo.getRGB(0, 0, width, height, ImageArrayTwo, 0, width);
//ImageArrayTwo = imageTwo.getRGB(0,0,width2,height2,ImageArrayTwo,0,width2);
//生成新图片
//int height3 = (height>height2 || height==height2)?height:height2;
BufferedImage imageNew = new BufferedImage(width * 2, height, BufferedImage.TYPE_INT_RGB);
//BufferedImage imageNew = new BufferedImage(width+width2,height3,BufferedImage.TYPE_INT_RGB);
imageNew.setRGB(0, 0, width, height, imageArrayOne, 0, width);//设置左半部分的RGB
imageNew.setRGB(width, 0, width, height, ImageArrayTwo, 0, width);//设置右半部分的RGB
//imageNew.setRGB(width,0,width2,height2,ImageArrayTwo,0,width2);//设置右半部分的RGB
File outFile = new File(toPath);
ImageIO.write(imageNew, imageFormat, outFile);//写图片
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 横向拼接一组（多张）图像
*
* @param pics 将要拼接的图像
* @param type 图像写入格式
* @param dst_pic 图像写入路径
* @return
*/
public static boolean joinImageListHorizontal(String[] pics, String type, String dst_pic) {
try {
int len = pics.length;
if (len < 1) {
System.out.println("pics len < 1");
return false;
}
File[] src = new File[len];
BufferedImage[] images = new BufferedImage[len];
int[][] imageArrays = new int[len][];
for (int i = 0; i < len; i++) {
src[i] = new File(pics[i]);
images[i] = ImageIO.read(src[i]);
int width = images[i].getWidth();
int height = images[i].getHeight();
imageArrays[i] = new int[width * height];// 从图片中读取RGB
imageArrays[i] = images[i].getRGB(0, 0, width, height, imageArrays[i], 0, width);
}
int dst_width = 0;
int dst_height = images[0].getHeight();
for (int i = 0; i < images.length; i++) {
dst_height = dst_height > images[i].getHeight() ? dst_height : images[i].getHeight();
dst_width += images[i].getWidth();
}
//System.out.println(dst_width);
//System.out.println(dst_height);
if (dst_height < 1) {
System.out.println("dst_height < 1");
return false;
}
/*
* 生成新图片
*/
BufferedImage ImageNew = new BufferedImage(dst_width, dst_height, BufferedImage.TYPE_INT_RGB);
int width_i = 0;
for (int i = 0; i < images.length; i++) {
ImageNew.setRGB(width_i, 0, images[i].getWidth(), dst_height, imageArrays[i], 0, images[i].getWidth());
width_i += images[i].getWidth();
}
File outFile = new File(dst_pic);
ImageIO.write(ImageNew, type, outFile);// 写图片
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 纵向拼接图片（两张）
*
* @param firstSrcImagePath 读取的第一张图片
* @param secondSrcImagePath 读取的第二张图片
* @param imageFormat 图片写入格式
* @param toPath 图片写入路径
*/
public static void joinImagesVertical(String firstSrcImagePath, String secondSrcImagePath, String imageFormat, String toPath) {
try {
//读取第一张图片
File fileOne = new File(firstSrcImagePath);
BufferedImage imageOne = ImageIO.read(fileOne);
int width = imageOne.getWidth();//图片宽度
int height = imageOne.getHeight();//图片高度
//从图片中读取RGB
int[] imageArrayOne = new int[width * height];
imageArrayOne = imageOne.getRGB(0, 0, width, height, imageArrayOne, 0, width);
//对第二张图片做相同的处理
File fileTwo = new File(secondSrcImagePath);
BufferedImage imageTwo = ImageIO.read(fileTwo);
int width2 = imageTwo.getWidth();
int height2 = imageTwo.getHeight();
int[] ImageArrayTwo = new int[width2 * height2];
ImageArrayTwo = imageTwo.getRGB(0, 0, width, height, ImageArrayTwo, 0, width);
//ImageArrayTwo = imageTwo.getRGB(0,0,width2,height2,ImageArrayTwo,0,width2);
//生成新图片
//int width3 = (width>width2 || width==width2)?width:width2;
BufferedImage imageNew = new BufferedImage(width, height * 2, BufferedImage.TYPE_INT_RGB);
//BufferedImage imageNew = new BufferedImage(width3,height+height2,BufferedImage.TYPE_INT_RGB);
imageNew.setRGB(0, 0, width, height, imageArrayOne, 0, width);//设置上半部分的RGB
imageNew.setRGB(0, height, width, height, ImageArrayTwo, 0, width);//设置下半部分的RGB
//imageNew.setRGB(0,height,width2,height2,ImageArrayTwo,0,width2);//设置下半部分的RGB
File outFile = new File(toPath);
ImageIO.write(imageNew, imageFormat, outFile);//写图片
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 纵向拼接一组（多张）图像
*
* @param pics 将要拼接的图像数组
* @param type 写入图像类型
* @param dst_pic 写入图像路径
* @return
*/
public static boolean joinImageListVertical(String[] pics, String type, String dst_pic) {
try {
int len = pics.length;
if (len < 1) {
System.out.println("pics len < 1");
return false;
}
File[] src = new File[len];
BufferedImage[] images = new BufferedImage[len];
int[][] imageArrays = new int[len][];
for (int i = 0; i < len; i++) {
//System.out.println(i);
src[i] = new File(pics[i]);
images[i] = ImageIO.read(src[i]);
int width = images[i].getWidth();
int height = images[i].getHeight();
imageArrays[i] = new int[width * height];// 从图片中读取RGB
imageArrays[i] = images[i].getRGB(0, 0, width, height, imageArrays[i], 0, width);
}
int dst_height = 0;
int dst_width = images[0].getWidth();
for (int i = 0; i < images.length; i++) {
dst_width = dst_width > images[i].getWidth() ? dst_width : images[i].getWidth();
dst_height += images[i].getHeight();
}
//System.out.println(dst_width);
//System.out.println(dst_height);
if (dst_height < 1) {
System.out.println("dst_height < 1");
return false;
}
/*
* 生成新图片
*/
BufferedImage ImageNew = new BufferedImage(dst_width, dst_height, BufferedImage.TYPE_INT_RGB);
int height_i = 0;
for (int i = 0; i < images.length; i++) {
ImageNew.setRGB(0, height_i, dst_width, images[i].getHeight(), imageArrays[i], 0, dst_width);
height_i += images[i].getHeight();
}
File outFile = new File(dst_pic);
ImageIO.write(ImageNew, type, outFile);// 写图片
} catch (Exception e) {
e.printStackTrace();
return false;
}
return true;
}
/**
* 合并图片(按指定初始x、y坐标将附加图片贴到底图之上)
*
* @param negativeImagePath 背景图片路径
* @param additionImagePath 附加图片路径
* @param x 附加图片的起始点x坐标
* @param y 附加图片的起始点y坐标
* @param toPath 图片写入路径
* @throws IOException
*/
public static void mergeBothImage(String negativeImagePath, String additionImagePath,String iamgeFromat, int x, int y, String toPath) throws IOException {
InputStream is = null;
InputStream is2 = null;
OutputStream os = null;
try {
is = new FileInputStream(negativeImagePath);
is2 = new FileInputStream(additionImagePath);
BufferedImage image = ImageIO.read(is);
BufferedImage image2 = ImageIO.read(is2);
Graphics g = image.getGraphics();
g.drawImage(image2, x, y, null);
os = new FileOutputStream(toPath);
ImageIO.write(image, iamgeFromat, os);//写图片
} catch (Exception e) {
e.printStackTrace();
} finally {
if (os != null) {
os.close();
}
if (is2 != null) {
is2.close();
}
if (is != null) {
is.close();
}
}
}
/**
* 将一组图片一次性附加合并到底图上
*
* @param negativeImagePath 源图像（底图）路径
* @param additionImageList 附加图像信息列表
* @param imageFormat 图像写入格式
* @param toPath 图像写入路径
* @throws IOException
*/
public static void mergeImageList(String negativeImagePath, List additionImageList, String imageFormat, String toPath) throws IOException {
InputStream is = null;
InputStream is2 = null;
OutputStream os = null;
try {
is = new FileInputStream(negativeImagePath);
BufferedImage image = ImageIO.read(is);
//Graphics g=image.getGraphics();
Graphics2D g = image.createGraphics();
BufferedImage image2 = null;
if (additionImageList != null) {
for (int i = 0; i < additionImageList.size(); i++) {
//解析附加图片信息：x坐标、 y坐标、 additionImagePath附加图片路径
//图片信息存储在一个数组中
String[] additionImageInfo = (String[]) additionImageList.get(i);
int x = Integer.parseInt(additionImageInfo[0]);
int y = Integer.parseInt(additionImageInfo[1]);
String additionImagePath = additionImageInfo[2];
//读取文件输入流，并合并图片
is2 = new FileInputStream(additionImagePath);
//System.out.println(x+" : "+y+" : "+additionImagePath);
image2 = ImageIO.read(is2);
g.drawImage(image2, x, y, null);
}
}
os = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, os);//写图片
//JPEGImageEncoder enc=JPEGCodec.createJPEGEncoder(os);
//enc.encode(image);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (os != null) {
os.close();
}
if (is2 != null) {
is2.close();
}
if (is != null) {
is.close();
}
}
}
/**
* 图片灰化操作
*
* @param srcImage 读取图片路径
* @param toPath 写入灰化后的图片路径
* @param imageFormat 图片写入格式
*/
public static void grayImage(String srcImage, String toPath, String imageFormat) {
try {
BufferedImage src = ImageIO.read(new File(srcImage));
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
ColorConvertOp op = new ColorConvertOp(cs, null);
src = op.filter(src, null);
ImageIO.write(src, imageFormat, new File(toPath));
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 在源图片上设置水印文字
*
* @param srcImagePath 源图片路径
* @param alpha 透明度（0<alpha<1）
* @param font 字体（例如：宋体）
* @param fontStyle 字体格式(例如：普通样式--Font.PLAIN、粗体--Font.BOLD )
* @param fontSize 字体大小
* @param color 字体颜色(例如：黑色--Color.BLACK)
* @param inputWords 输入显示在图片上的文字
* @param x 文字显示起始的x坐标
* @param y 文字显示起始的y坐标
* @param imageFormat 写入图片格式（png/jpg等）
* @param toPath 写入图片路径
* @throws IOException
*/
public static void alphaWords2Image(String srcImagePath, float alpha,
String font, int fontStyle, int fontSize, Color color,
String inputWords, int x, int y, String imageFormat, String toPath) throws IOException {
FileOutputStream fos = null;
try {
BufferedImage image = ImageIO.read(new File(srcImagePath));
//创建java2D对象
Graphics2D g2d = image.createGraphics();
//用源图像填充背景
g2d.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null, null);
//设置透明度
AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);
g2d.setComposite(ac);
//设置文字字体名称、样式、大小
g2d.setFont(new Font(font, fontStyle, fontSize));
g2d.setColor(color);//设置字体颜色
g2d.drawString(inputWords, x, y); //输入水印文字及其起始x、y坐标
g2d.dispose();
fos = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, fos);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
/**
* 在源图像上设置图片水印
* ---- 当alpha==1时文字不透明（和在图片上直接输入文字效果一样）
*
* @param srcImagePath 源图片路径
* @param appendImagePath 水印图片路径
* @param alpha 透明度
* @param x 水印图片的起始x坐标
* @param y 水印图片的起始y坐标
* @param width 水印图片的宽度
* @param height 水印图片的高度
* @param imageFormat 图像写入图片格式
* @param toPath 图像写入路径
* @throws IOException
*/
public static void alphaImage2Image(String srcImagePath, String appendImagePath,
float alpha, int x, int y, int width, int height,
String imageFormat, String toPath) throws IOException {
FileOutputStream fos = null;
try {
BufferedImage image = ImageIO.read(new File(srcImagePath));
//创建java2D对象
Graphics2D g2d = image.createGraphics();
//用源图像填充背景
g2d.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null, null);
//设置透明度
AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);
g2d.setComposite(ac);
//设置水印图片的起始x/y坐标、宽度、高度
BufferedImage appendImage = ImageIO.read(new File(appendImagePath));
g2d.drawImage(appendImage, x, y, width, height, null, null);
g2d.dispose();
fos = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, fos);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
/**
* 画单点 ---- 实际上是画一个填充颜色的圆
* ---- 以指定点坐标为中心画一个小半径的圆形，并填充其颜色来充当点
*
* @param srcImagePath 源图片颜色
* @param x 点的x坐标
* @param y 点的y坐标
* @param width 填充的宽度
* @param height 填充的高度
* @param ovalColor 填充颜色
* @param imageFormat 写入图片格式
* @param toPath 写入路径
* @throws IOException
*/
public static void drawPoint(String srcImagePath, int x, int y, int width, int height, Color ovalColor, String imageFormat, String toPath) throws IOException {
FileOutputStream fos = null;
try {
//获取源图片
BufferedImage image = ImageIO.read(new File(srcImagePath));
//根据xy点坐标绘制连接线
Graphics2D g2d = image.createGraphics();
g2d.setColor(ovalColor);
//填充一个椭圆形
g2d.fillOval(x, y, width, height);
fos = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, fos);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
/**
* 画一组（多个）点---- 实际上是画一组（多个）填充颜色的圆
* ---- 以指定点坐标为中心画一个小半径的圆形，并填充其颜色来充当点
*
* @param srcImagePath 原图片路径
* @param pointList 点列表
* @param width 宽度
* @param height 高度
* @param ovalColor 填充颜色
* @param imageFormat 写入图片颜色
* @param toPath 写入路径
* @throws IOException
*/
public static void drawPoints(String srcImagePath, List pointList, int width, int height, Color ovalColor, String imageFormat, String toPath) throws IOException {
FileOutputStream fos = null;
try {
//获取源图片
BufferedImage image = ImageIO.read(new File(srcImagePath));
//根据xy点坐标绘制连接线
Graphics2D g2d = image.createGraphics();
g2d.setColor(ovalColor);
//填充一个椭圆形
if (pointList != null) {
for (int i = 0; i < pointList.size(); i++) {
Point point = (Point) pointList.get(i);
int x = (int) point.getX();
int y = (int) point.getY();
g2d.fillOval(x, y, width, height);
}
}
fos = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, fos);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
/**
* 画线段
*
* @param srcImagePath 源图片路径
* @param x1 第一个点x坐标
* @param y1 第一个点y坐标
* @param x2 第二个点x坐标
* @param y2 第二个点y坐标
* @param lineColor 线条颜色
* @param toPath 图像写入路径
* @param imageFormat 图像写入格式
* @throws IOException
*/
public static void drawLine(String srcImagePath, int x1, int y1, int x2, int y2, Color lineColor, String toPath, String imageFormat) throws IOException {
FileOutputStream fos = null;
try {
//获取源图片
BufferedImage image = ImageIO.read(new File(srcImagePath));
//根据xy点坐标绘制连接线
Graphics2D g2d = image.createGraphics();
g2d.setColor(lineColor);
g2d.drawLine(x1, y1, x2, y2);
fos = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, fos);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
/**
* 画折线 / 线段
* ---- 2个点即画线段，多个点画折线
*
* @param srcImagePath 源图片路径
* @param xPoints x坐标数组
* @param yPoints y坐标数组
* @param nPoints 点的数量
* @param lineColor 线条颜色
* @param toPath 图像写入路径
* @param imageFormat 图片写入格式
* @throws IOException
*/
public static void drawPolyline(String srcImagePath, int[] xPoints, int[] yPoints, int nPoints, Color lineColor, String toPath, String imageFormat) throws IOException {
FileOutputStream fos = null;
try {
//获取源图片
BufferedImage image = ImageIO.read(new File(srcImagePath));
//根据xy点坐标绘制连接线
Graphics2D g2d = image.createGraphics();
//设置线条颜色
g2d.setColor(lineColor);
g2d.drawPolyline(xPoints, yPoints, nPoints);
//图像写出路径
fos = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, fos);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
/**
* 绘制折线，并突出显示转折点
*
* @param srcImagePath 源图片路径
* @param xPoints x坐标数组
* @param yPoints y坐标数组
* @param nPoints 点的数量
* @param lineColor 连线颜色
* @param width 点的宽度
* @param height 点的高度
* @param ovalColor 点的填充颜色
* @param toPath 图像写入路径
* @param imageFormat 图像写入格式
* @throws IOException
*/
public static void drawPolylineShowPoints(String srcImagePath, int[] xPoints, int[] yPoints, int nPoints, Color lineColor, int width, int height, Color ovalColor, String toPath, String imageFormat) throws IOException {
FileOutputStream fos = null;
try {
//获取源图片
BufferedImage image = ImageIO.read(new File(srcImagePath));
//根据xy点坐标绘制连接线
Graphics2D g2d = image.createGraphics();
//设置线条颜色
g2d.setColor(lineColor);
//画线条
g2d.drawPolyline(xPoints, yPoints, nPoints);
//设置圆点颜色
g2d.setColor(ovalColor);
//画圆点
if (xPoints != null) {
for (int i = 0; i < xPoints.length; i++) {
int x = xPoints[i];
int y = yPoints[i];
g2d.fillOval(x, y, width, height);
}
}
//图像写出路径
fos = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, fos);
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
/**
* 绘制一个由 x 和 y 坐标数组定义的闭合多边形
*
* @param srcImagePath 源图片路径
* @param xPoints x坐标数组
* @param yPoints y坐标数组
* @param nPoints 坐标点的个数
* @param polygonColor 线条颜色
* @param imageFormat 图像写入格式
* @param toPath 图像写入路径
* @throws IOException
*/
public static void drawPolygon(String srcImagePath, int[] xPoints, int[] yPoints, int nPoints, Color polygonColor, String imageFormat, String toPath) throws IOException {
FileOutputStream fos = null;
try {
//获取图片
BufferedImage image = ImageIO.read(new File(srcImagePath));
//根据xy点坐标绘制闭合多边形
Graphics2D g2d = image.createGraphics();
g2d.setColor(polygonColor);
g2d.drawPolygon(xPoints, yPoints, nPoints);
fos = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, fos);
g2d.dispose();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
/**
* 绘制并填充多边形
*
* @param srcImagePath 源图像路径
* @param xPoints x坐标数组
* @param yPoints y坐标数组
* @param nPoints 坐标点个数
* @param polygonColor 多边形填充颜色
* @param alpha 多边形部分透明度
* @param imageFormat 写入图形格式
* @param toPath 写入图形路径
* @throws IOException
*/
public static void drawAndAlphaPolygon(String srcImagePath, int[] xPoints, int[] yPoints, int nPoints, Color polygonColor, float alpha, String imageFormat, String toPath) throws IOException {
FileOutputStream fos = null;
try {
//获取图片
BufferedImage image = ImageIO.read(new File(srcImagePath));
//根据xy点坐标绘制闭合多边形
Graphics2D g2d = image.createGraphics();
g2d.setColor(polygonColor);
//设置透明度
AlphaComposite ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, alpha);
g2d.setComposite(ac);
g2d.fillPolygon(xPoints, yPoints, nPoints);
fos = new FileOutputStream(toPath);
ImageIO.write(image, imageFormat, fos);
g2d.dispose();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fos != null) {
fos.close();
}
}
}
}