package com.sicdt.sicsign.web.utils;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import org.apache.commons.io.FileUtils;
import org.bouncycastle.util.encoders.Base64Encoder;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.pdf.PdfWriter;
public class MyImgUtils {
/**
* <br>描 述: 将图片BASE64字符串转为二进制数组
* <br>作 者: 七脉
* @param base64 new Image();img.src或canvas.toDataURL("image/png")
* @return
* @throws IOException
*/
@SuppressWarnings("restriction")
public static byte[] imgBase64ToBytes(String base64) {
sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();
//因为参数base64来源不一样，需要将附件数据替换清空掉。如果此入参来自canvas.toDataURL("image/png");
base64 = base64.replaceAll("data:image/png;base64,", "");
//base64解码并转为二进制数组
byte[] bytes = null;
try {
bytes = decoder.decodeBuffer(base64);
for (int i = 0; i < bytes.length; ++i) {
if (bytes[i] < 0) {// 调整异常数据
bytes[i] += 256;
}
}
} catch (IOException e) {
e.printStackTrace();
}
return bytes;
}
/**
* <br>描 述: 图片字节数组转base64
* <br>作 者: shizhenwei
* <br>历 史: (版本) 作者 时间 注释
* @return
*/
@SuppressWarnings("restriction")
public static String bytesToImgBase64(byte[] bytes){
sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();
return encoder.encode(bytes);
}
/**
*
* <br>描 述: 图片/文件转二进制数组，这个方法有很多，只写一个
* <br>作 者: 七脉
* @param imgPath 图片路径
* @return
* @throws FileNotFoundException
*/
public static byte[] imgToBytes(String imgPath) {
File file = new File(imgPath);
BufferedImage bi = null;
ByteArrayOutputStream baos = null;
try {
//文件使用其他工具
bi = ImageIO.read(file);
baos = new ByteArrayOutputStream();
int index = imgPath.lastIndexOf(".");
String format = imgPath.substring(index+1);
ImageIO.write(bi, format, baos);
byte[] bytes = baos.toByteArray();
baos.close();
return bytes;
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
*
* <br>描 述: 将二进制转换为图片
* <br>作 者: 七脉
* @param outPath 将图片输出到哪里
* @param savePath 保存位置
*/
public static void bytesToImg(byte[] bytes,String savePath){
ByteArrayInputStream baos = new ByteArrayInputStream(bytes);
try {
BufferedImage bi = ImageIO.read(baos);
File file = new File(savePath);
ImageIO.write(bi, "png", file);
baos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* <br>描 述: 图片二进制数组转PDF二进制数组
* <br>作 者: 七脉
* @param imgBytes 图片二进制数组
* @return
*/
public static byte[] imgBytesToPdfBytes(byte[] imgBytes){
byte[] bytes = null;
Document document = new Document();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
PdfWriter.getInstance(document, baos);
// 设置文档的大小
document.setPageSize(PageSize.A4);
// 打开文档
document.open();
// 读取一个图片
Image image = Image.getInstance(imgBytes);
float imageWidth = image.getScaledWidth();
int i = 0;
while (imageWidth > 600) {
image.scalePercent(100 - i);
i++;
imageWidth = image.getScaledWidth();
}
image.setAlignment(Image.ALIGN_CENTER);
// 插入一个图片
document.add(image);
//转二进制数组
bytes = baos.toByteArray();
return bytes;
} catch (DocumentException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if(null!=baos){
try {
baos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(null!=document){
document.close();
}
}
return bytes;
}
/**
*
* <br>描 述: 二进制转文件，什么样的二进制转什么样的文件
* <br>作 者: 七脉
* @param bytes 二进制数组
* @param savePath 文件保存路径
*/
public static void byteArrayToFile(byte[] bytes,String savePath){
try {
FileUtils.writeByteArrayToFile(new File(savePath), bytes);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* <br>描 述: 去除图片背景,转透明图
* <br>作 者: shizhenwei
* <br>历 史: (版本) 作者 时间 注释
* @param is
* @return
*/
public static byte[] toTransparency(InputStream is) {
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
try {
BufferedImage bi = ImageIO.read(is);
java.awt.Image image = (java.awt.Image) bi;
ImageIcon imageIcon = new ImageIcon(image);
BufferedImage bufferedImage = new BufferedImage(imageIcon.getIconWidth(), imageIcon.getIconHeight(),
BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g2D = (Graphics2D) bufferedImage.getGraphics();
g2D.drawImage(imageIcon.getImage(), 0, 0, imageIcon.getImageObserver());
int alpha = 0;
for (int j1 = bufferedImage.getMinY(); j1 < bufferedImage.getHeight(); j1++) {
for (int j2 = bufferedImage.getMinX(); j2 < bufferedImage.getWidth(); j2++) {
int rgb = bufferedImage.getRGB(j2, j1);
int R = (rgb & 0xff0000) >> 16;
int G = (rgb & 0xff00) >> 8;
int B = (rgb & 0xff);
if (((255 - R) < 30) && ((255 - G) < 30) && ((255 - B) < 30)) {
rgb = ((alpha + 1) << 24) | (rgb & 0x00ffffff);
}
bufferedImage.setRGB(j2, j1, rgb);
}
}
g2D.drawImage(bufferedImage, 0, 0, imageIcon.getImageObserver());
ImageIO.write(bufferedImage, "png", byteArrayOutputStream);// 直接输出文件
} catch (Exception e) {
e.printStackTrace();
}
return byteArrayOutputStream.toByteArray();
}
}
