JAVA图片压缩质量
2015-07-03 17:03
423 查看
jdk1.5之前的不支持PNG格式的图片,之后支持,下面先来一个传进文件传出文件方式的:
Java代码
![](http://fandayrockworld.iteye.com/images/icon_star.png)
public static void main(String[] args)
{
if(compressPic("D:/Program Files/myftp/1.jpg", "D:/Program Files/myftp/ssss.jpg"))
{
System.out.println("压缩成功!");
}
else
{
System.out.println("压缩失败!");
}
}
public static boolean compressPic(String srcFilePath, String descFilePath)
{
File file = null;
BufferedImage src = null;
FileOutputStream out = null;
ImageWriter imgWrier;
ImageWriteParam imgWriteParams;
// 指定写图片的方式为 jpg
imgWrier = ImageIO.getImageWritersByFormatName("jpg").next();
imgWriteParams = new javax.imageio.plugins.jpeg.JPEGImageWriteParam(null);
// 要使用压缩,必须指定压缩方式为MODE_EXPLICIT
imgWriteParams.setCompressionMode(imgWriteParams.MODE_EXPLICIT);
// 这里指定压缩的程度,参数qality是取值0~1范围内,
imgWriteParams.setCompressionQuality((float)0.1);
imgWriteParams.setProgressiveMode(imgWriteParams.MODE_DISABLED);
ColorModel colorModel = ColorModel.getRGBdefault();
// 指定压缩时使用的色彩模式
imgWriteParams.setDestinationType(new javax.imageio.ImageTypeSpecifier(colorModel, colorModel
.createCompatibleSampleModel(16, 16)));
try
{
if(StringUtils.isBlank(srcFilePath))
{
return false;
}
else
{
file = new File(srcFilePath);
src = ImageIO.read(file);
out = new FileOutputStream(descFilePath);
imgWrier.reset();
// 必须先指定 out值,才能调用write方法, ImageOutputStream可以通过任何 OutputStream构造
imgWrier.setOutput(ImageIO.createImageOutputStream(out));
// 调用write方法,就可以向输入流写图片
imgWrier.write(null, new IIOImage(src, null, null), imgWriteParams);
out.flush();
out.close();
}
}
catch(Exception e)
{
e.printStackTrace();
return false;
}
return true;
}
下面是传进byte[],传出byte[]数组的,稍微修改即可即可,(data为传过来的byte[]数组)
Java代码
![](http://fandayrockworld.iteye.com/images/icon_star.png)
ByteArrayInputStream is = new ByteArrayInputStream(data);
BufferedImage src = null;
ByteArrayOutputStream out = null;
ImageWriter imgWrier;
ImageWriteParam imgWriteParams;
// 指定写图片的方式为 jpg
imgWrier = ImageIO.getImageWritersByFormatName("jpg").next();
imgWriteParams = new javax.imageio.plugins.jpeg.JPEGImageWriteParam(null);
// 要使用压缩,必须指定压缩方式为MODE_EXPLICIT
imgWriteParams.setCompressionMode(imgWriteParams.MODE_EXPLICIT);
// 这里指定压缩的程度,参数qality是取值0~1范围内,
imgWriteParams.setCompressionQuality((float)0.1/data.length);
imgWriteParams.setProgressiveMode(imgWriteParams.MODE_DISABLED);
ColorModel colorModel = ColorModel.getRGBdefault();
// 指定压缩时使用的色彩模式
imgWriteParams.setDestinationType(new javax.imageio.ImageTypeSpecifier(colorModel, colorModel
.createCompatibleSampleModel(16, 16)));
try
{
src = ImageIO.read(is);
out = new ByteArrayOutputStream(data.length);
imgWrier.reset();
// 必须先指定 out值,才能调用write方法, ImageOutputStream可以通过任何 OutputStream构造
imgWrier.setOutput(ImageIO.createImageOutputStream(out));
// 调用write方法,就可以向输入流写图片
imgWrier.write(null, new IIOImage(src, null, null), imgWriteParams);
out.flush();
out.close();
is.close();
data = out.toByteArray();
}
catch(Exception e)
{
e.printStackTrace();
}
Java代码
![](http://fandayrockworld.iteye.com/images/icon_star.png)
public static void main(String[] args)
{
if(compressPic("D:/Program Files/myftp/1.jpg", "D:/Program Files/myftp/ssss.jpg"))
{
System.out.println("压缩成功!");
}
else
{
System.out.println("压缩失败!");
}
}
public static boolean compressPic(String srcFilePath, String descFilePath)
{
File file = null;
BufferedImage src = null;
FileOutputStream out = null;
ImageWriter imgWrier;
ImageWriteParam imgWriteParams;
// 指定写图片的方式为 jpg
imgWrier = ImageIO.getImageWritersByFormatName("jpg").next();
imgWriteParams = new javax.imageio.plugins.jpeg.JPEGImageWriteParam(null);
// 要使用压缩,必须指定压缩方式为MODE_EXPLICIT
imgWriteParams.setCompressionMode(imgWriteParams.MODE_EXPLICIT);
// 这里指定压缩的程度,参数qality是取值0~1范围内,
imgWriteParams.setCompressionQuality((float)0.1);
imgWriteParams.setProgressiveMode(imgWriteParams.MODE_DISABLED);
ColorModel colorModel = ColorModel.getRGBdefault();
// 指定压缩时使用的色彩模式
imgWriteParams.setDestinationType(new javax.imageio.ImageTypeSpecifier(colorModel, colorModel
.createCompatibleSampleModel(16, 16)));
try
{
if(StringUtils.isBlank(srcFilePath))
{
return false;
}
else
{
file = new File(srcFilePath);
src = ImageIO.read(file);
out = new FileOutputStream(descFilePath);
imgWrier.reset();
// 必须先指定 out值,才能调用write方法, ImageOutputStream可以通过任何 OutputStream构造
imgWrier.setOutput(ImageIO.createImageOutputStream(out));
// 调用write方法,就可以向输入流写图片
imgWrier.write(null, new IIOImage(src, null, null), imgWriteParams);
out.flush();
out.close();
}
}
catch(Exception e)
{
e.printStackTrace();
return false;
}
return true;
}
下面是传进byte[],传出byte[]数组的,稍微修改即可即可,(data为传过来的byte[]数组)
Java代码
![](http://fandayrockworld.iteye.com/images/icon_star.png)
ByteArrayInputStream is = new ByteArrayInputStream(data);
BufferedImage src = null;
ByteArrayOutputStream out = null;
ImageWriter imgWrier;
ImageWriteParam imgWriteParams;
// 指定写图片的方式为 jpg
imgWrier = ImageIO.getImageWritersByFormatName("jpg").next();
imgWriteParams = new javax.imageio.plugins.jpeg.JPEGImageWriteParam(null);
// 要使用压缩,必须指定压缩方式为MODE_EXPLICIT
imgWriteParams.setCompressionMode(imgWriteParams.MODE_EXPLICIT);
// 这里指定压缩的程度,参数qality是取值0~1范围内,
imgWriteParams.setCompressionQuality((float)0.1/data.length);
imgWriteParams.setProgressiveMode(imgWriteParams.MODE_DISABLED);
ColorModel colorModel = ColorModel.getRGBdefault();
// 指定压缩时使用的色彩模式
imgWriteParams.setDestinationType(new javax.imageio.ImageTypeSpecifier(colorModel, colorModel
.createCompatibleSampleModel(16, 16)));
try
{
src = ImageIO.read(is);
out = new ByteArrayOutputStream(data.length);
imgWrier.reset();
// 必须先指定 out值,才能调用write方法, ImageOutputStream可以通过任何 OutputStream构造
imgWrier.setOutput(ImageIO.createImageOutputStream(out));
// 调用write方法,就可以向输入流写图片
imgWrier.write(null, new IIOImage(src, null, null), imgWriteParams);
out.flush();
out.close();
is.close();
data = out.toByteArray();
}
catch(Exception e)
{
e.printStackTrace();
}
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