package com.sinata.system.utils;
|
|
import java.awt.image.BufferedImage;
|
import java.io.File;
|
import java.io.FileOutputStream;
|
import java.io.InputStream;
|
import java.io.OutputStream;
|
import java.net.URL;
|
|
public class ImgUtils {
|
/**
|
* 从URL中获取图片输入流
|
* 并创建本地文件
|
*
|
* @param imageUrl
|
* @param savePath
|
* @return
|
* @throws Exception
|
*/
|
public static File getImageFileFromUrl(String imageUrl, String savePath) throws Exception {
|
// 从URL中获取图片输入流
|
URL url = new URL(imageUrl);
|
InputStream in = url.openStream();
|
|
|
// 构建保存路径
|
String[] split = imageUrl.split("/");
|
String fileName = split[split.length - 1];
|
File file = new File(savePath + fileName);
|
if (!file.exists()) {
|
file.createNewFile();
|
}
|
|
// 写入文件
|
FileOutputStream out = new FileOutputStream(file);
|
byte[] buffer = new byte[4096];
|
int n = 0;
|
while ((n = in.read(buffer)) != -1) {
|
out.write(buffer, 0, n);
|
}
|
out.close();
|
in.close();
|
|
return file;
|
}
|
|
/**
|
* 根据URL地址获取文件
|
* 得到file对象
|
*
|
* @param path URL网络地址
|
* @return File
|
*/
|
public static File getFileByHttpURL(String path) {
|
String newUrl = path.split("[?]")[0];
|
String[] suffix = newUrl.split("/");
|
//得到最后一个分隔符后的名字
|
String fileName = suffix[suffix.length - 1];
|
File file = null;
|
InputStream inputStream = null;
|
OutputStream outputStream = null;
|
try {
|
file = File.createTempFile("report", fileName);//创建临时文件
|
URL urlFile = new URL(newUrl);
|
inputStream = urlFile.openStream();
|
outputStream = new FileOutputStream(file);
|
|
int bytesRead = 0;
|
byte[] buffer = new byte[8192];
|
while ((bytesRead = inputStream.read(buffer, 0, 8192)) != -1) {
|
outputStream.write(buffer, 0, bytesRead);
|
}
|
} catch (Exception e) {
|
e.printStackTrace();
|
} finally {
|
try {
|
if (null != outputStream) {
|
outputStream.close();
|
}
|
if (null != inputStream) {
|
inputStream.close();
|
}
|
|
} catch (Exception e) {
|
e.printStackTrace();
|
}
|
}
|
return file;
|
}
|
|
//顺时针旋转90度（通过交换图像的整数像素RGB 值）
|
public static BufferedImage rotateClockwise90(BufferedImage bi) {
|
int width = bi.getWidth();
|
int height = bi.getHeight();
|
BufferedImage bufferedImage = new BufferedImage(height, width, bi.getType());
|
for (int i = 0; i < width; i++)
|
for (int j = 0; j < height; j++)
|
bufferedImage.setRGB(height - 1 - j, width - 1 - i, bi.getRGB(i, j));
|
return bufferedImage;
|
}
|
|
//逆时针旋转90度（通过交换图像的整数像素RGB 值）
|
public static BufferedImage rotateCounterclockwise90(BufferedImage bi) {
|
int width = bi.getWidth();
|
int height = bi.getHeight();
|
BufferedImage bufferedImage = new BufferedImage(height, width, bi.getType());
|
for (int i = 0; i < width; i++)
|
for (int j = 0; j < height; j++)
|
bufferedImage.setRGB(j, i, bi.getRGB(i, j));
|
return bufferedImage;
|
}
|
|
//旋转180度（通过交换图像的整数像素RGB 值）
|
public static BufferedImage rotate180(BufferedImage bi) {
|
int width = bi.getWidth();
|
int height = bi.getHeight();
|
BufferedImage bufferedImage = new BufferedImage(width, height, bi.getType());
|
for (int i = 0; i < width; i++)
|
for (int j = 0; j < height; j++)
|
bufferedImage.setRGB(width - i - 1, height - j - 1, bi.getRGB(i, j));
|
return bufferedImage;
|
}
|
|
//水平翻转
|
public static BufferedImage rotateHorizon(BufferedImage bi) {
|
int width = bi.getWidth();
|
int height = bi.getHeight();
|
BufferedImage bufferedImage = new BufferedImage(width, height, bi.getType());
|
for (int i = 0; i < width; i++)
|
for (int j = 0; j < height; j++)
|
bufferedImage.setRGB(width - i - 1, j, bi.getRGB(i, j));
|
return bufferedImage;
|
}
|
|
//垂直翻转
|
public static BufferedImage rotateVertical(BufferedImage bi) {
|
int width = bi.getWidth();
|
int height = bi.getHeight();
|
BufferedImage bufferedImage = new BufferedImage(width, height, bi.getType());
|
for (int i = 0; i < width; i++)
|
for (int j = 0; j < height; j++)
|
bufferedImage.setRGB(i, height - 1 - j, bi.getRGB(i, j));
|
return bufferedImage;
|
}
|
|
public static void main(String[] args) throws Exception {
|
//File file = ImgUtils.getImageFileFromUrl("【你的图片网络url】", "【你要保存的本地文件位置】");
|
File file = ImgUtils.getFileByHttpURL("【你的图片网络url】");
|
System.out.println("file.length() = " + file.length());
|
}
|
}
|
