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easy.util.Images Maven / Gradle / Ivy
package easy.util;
import javax.imageio.*;
import javax.imageio.stream.ImageInputStream;
import javax.imageio.stream.ImageOutputStream;
import javax.imageio.stream.MemoryCacheImageInputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Iterator;
public class Images
{
public Images()
{
}
/**
* 存jpg文件
* @param tagFileName
* @param image
* @param compressionquality 图片质量
* @throws IOException
*/
public static void toJpg(final String tagFileName,BufferedImage image,float compressionquality) throws IOException
{
ImageWriter writer = null;
Iterator iter = ImageIO.getImageWritersByFormatName("jpg");
if (iter.hasNext())
{
writer = iter.next();
}
// 准备输出文件
// JFile.delete(tagFileName);
BufferedOutputStream ofile = new BufferedOutputStream(new FileOutputStream(tagFileName, false));
ImageOutputStream ios = ImageIO.createImageOutputStream(ofile);
writer.setOutput(ios);
// 设置压缩比
ImageWriteParam iwparam = writer.getDefaultWriteParam();
iwparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
iwparam.setProgressiveMode(ImageWriteParam.MODE_DISABLED);
iwparam.setCompressionQuality(compressionquality);
// 写图片
writer.write(null, new IIOImage(image, null, null), iwparam);
// 最后清理
ios.flush();
writer.dispose();
ios.close();
}
/**
* 图片修改尺寸
*
* @param srcFileName
* @param tagFileName
* @param width
* @param height
* @throws IOException
*/
public static void resize(String srcFileName, String tagFileName,
int width, int height) throws IOException
{
if (width <= 0 || height <= 0)
{
ImageReader r = getReader(srcFileName);
int w = r.getWidth(0);
int h = r.getHeight(0);
if (width <= 0)
{
width = (int) (w * ((double) height / h));
}
else if (height <= 0)
{
height = (int) (h * ((double) width / w));
}
// System.out.println(width+" "+height);
}
String ext = Format.getFileExtName(srcFileName).toLowerCase();
if (ext.equals(""))
{
ext = "jpg";
}
boolean isjpg = false;
//System.setProperty("java.awt.headless", "true");
if (ext.equals("jpg"))
{
/* JPEGImageDecoder decoder = JPEGCodec
.createJPEGDecoder(new FileInputStream(srcFileName)); // 先把流转一遍*/
BufferedImage bi = ImageIO.read(new FileInputStream(srcFileName));
// Builder bu = Thumbnails.of(image).size(width,
// hight);
BufferedImage tag = new BufferedImage(width, height,BufferedImage.TYPE_INT_BGR);
Graphics2D g = (Graphics2D) tag.getGraphics();
//g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
//g.drawImage(bi, 0, 0, width, height, null);
g.drawImage(bi.getScaledInstance(width, height,
Image.SCALE_AREA_AVERAGING), 0, 0, width, height, null);
/*
* tag.getGraphics().drawImage(
bi.getScaledInstance(width, height,
Image.SCALE_AREA_AVERAGING), 0, 0, null);
*/
toJpg(tagFileName,tag,0.9f);
isjpg = true;
}
if (!isjpg)
{
BufferedImage bi = ImageIO.read(new File(srcFileName));
BufferedImage tag = new BufferedImage(width, height,
BufferedImage.TYPE_INT_BGR);
Graphics2D g = (Graphics2D) tag.getGraphics();
g.drawImage(bi, 0, 0, width, height, null);
if (ext.equals("jpg"))
{
toJpg(tagFileName,tag,0.9f);
}
else
{
ImageIO.write(tag, ext, new File(tagFileName));
}
}
// BufferedImage bi = ImageIO.read(new File(srcFileName));
// http://img04.taobaocdn.com/bao/uploaded/i4/T1ofTwFEJdXXXXXXXX_!!0-item_pic.jpg
}
/**
* 剪裁图片
*
* @param srcFileName
* @param tagFileName
* @param width
* @param height
* @throws IOException
*/
public static void cut(String srcFileName, String tagFileName, int x,
int y, int width, int height) throws IOException
{
String ext = Format.getFileExtName(srcFileName);
// BufferedImage bi = ImageIO.read(new File(srcFileName));
BufferedImage tag = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
ImageReader reader = getReader(srcFileName);
ImageInputStream iis = ImageIO.createImageInputStream(new File(
srcFileName));
reader.setInput(iis, true);
Rectangle rect = new Rectangle(x, y, width, height);
ImageReadParam param = reader.getDefaultReadParam();
param.setSourceRegion(rect);
BufferedImage bi = reader.read(0, param);
tag.getGraphics().drawImage(bi, 0, 0, width, height, null);
ImageIO.write(tag, ext, new File(tagFileName));
}
public static String getImageType(final String localpath) throws IOException
{
FileInputStream fis = new FileInputStream(localpath);
int leng = fis.available();
BufferedInputStream buff = new BufferedInputStream(fis);
byte[] mapObj = new byte[leng];
buff.read(mapObj, 0, leng);
String type = "";
ByteArrayInputStream bais = new ByteArrayInputStream(mapObj);
MemoryCacheImageInputStream mcis = new MemoryCacheImageInputStream(bais);
Iterator itr = ImageIO.getImageReaders(mcis);
while (itr.hasNext())
{
ImageReader reader = itr.next();
type = reader.getFormatName();
break;
// System.out.println(reader.getFormatName());
/*if (reader instanceof GIFImageReader)
{
type = "gif";
}
else if (reader instanceof JPEGImageReader)
{
type = "jpg";
}
else if (reader instanceof PNGImageReader)
{
type = "png";
}
else if (reader instanceof BMPImageReader)
{
type = "bmp";
}
else if (reader instanceof WBMPImageReader)
{
type = "bmp";
}*/
}
fis.close();
return type;
}
/**
* 返回图片信息
*
* @param localpath
* @return
* @throws IOException
*/
public static ImageReader getReader(final String localpath)
throws IOException
{
//String ext = Format.getFileExtName(localpath);
ImageReader reader = null;
String ext = getImageType(localpath);
Iterator readers = ImageIO.getImageReadersByFormatName(ext);
if (readers.hasNext())
{
reader = readers.next();
File file = new File(localpath);
ImageInputStream input = ImageIO.createImageInputStream(file);
reader.setInput(input, true);
}
// int width = reader.getWidth(0);
// int height = reader.getHeight(0);
return reader;
}
// /*
// * 改改变尺寸如果不合适就进行剪裁到合适尺寸
// *
// */
// public static void resizecut(String srcFileName, String tagFileName,
// int width, int height) throws IOException
// {
//
// }
/**
* @param args
*/
public static void main(String[] args)
{
try
{
Images.resize("/Users/Neo/Desktop/a.jpg",
"/Users/Neo/Desktop/b.jpg", 20, 0);
// Images.resize("/Users/Neo/Desktop/a.",
// "/Users/Neo/Desktop/bb.jpg", 350, 0);
// Images.resize("/Users/Neo/Desktop/a.png",
// "/Users/Neo/Desktop/bb.png", 350, 0);
}
catch (IOException e)
{
Log.OutException(e);
}
// try
// {
// ImageReader r =
// getReader("/Users/Neo/Desktop/down/2014-04-14/59a35c174e7298d1dedbb9f2f0a067bb.jpg");
//
// System.out.println(r.getWidth(0) + " " + r.getHeight(0));
//
//
// resize("/Users/Neo/Desktop/down/2014-04-14/59a35c174e7298d1dedbb9f2f0a067bb.jpg","/Users/Neo/Desktop/down/2014-04-14/aaa.jpg",1200,1200);
// //resizePro("/Users/Neo/Desktop/down/2014-04-14/59a35c174e7298d1dedbb9f2f0a067bb.jpg","/Users/Neo/Desktop/down/2014-04-14/bbb.jpg",0,300);
// cut("/Users/Neo/Desktop/down/2014-04-14/59a35c174e7298d1dedbb9f2f0a067bb.jpg","/Users/Neo/Desktop/down/2014-04-14/ccc.jpg",0,200,800,400);
// resizecut("/Users/Neo/Desktop/down/2014-04-14/59a35c174e7298d1dedbb9f2f0a067bb.jpg","/Users/Neo/Desktop/down/2014-04-14/ccc.jpg",0,200,800,400);
//
// }
// catch (IOException e)
// {
// Log.OutException(e);
// }
}
}
