Linux图片处理工具-GraphicsMagick

下载gm http://download.csdn.net/detail/madman_trio/9280499 下载jpeg和png http://download.csdn.net/detail/madman_trio/9280515
1. 下载 GraphicsMagick-1.3.20.tar.gz
2. 解压 tar -xvzf GraphicsMagick-1.3.20.tar.gz
3. cd GraphicsMagick-1.3.20
4. ./configure --without-prel --enable-shared --disable-openmp
5. make
6. make install
7. vi /etc/profile > IM4JAVA_TOOLPATH=/usr/local/bin/gm
8. ldconfig

遇到问题
gm: error while loading shared libraries: libGraphicsMagick.so.3: cannot open shared object file: No such file or directory
原因是没执行第8步

查看版本及安装信息 gm identify -version

-------------------支持PNG---------------------
1. 下载libpng-1.4.16.tar.gz
2. 解压
3. cd libpng-1.4.16
4. ./configure
5.
make
6. make
install
7.
重装GraphicsMagick，重复上面步骤 3 4 5 6 8

如果发现即便安装了libjpeg-6b，
也不能支持JPEG那么你需要安装libjpeg-devel，【yum
install libjpeg-turbo-devel】

######################################java demo###############################

import org.im4java.core.ConvertCmd;
import org.im4java.core.IMOperation;
public class ImageUtility {
public static void resize(String inFileName, String outFileName, String width, double quality) {
ConvertCmd cmd = new ConvertCmd(true);
IMOperation op = new IMOperation();
op.addImage(inFileName);
op.resize();
op.addRawArgs(width); //"300x"
op.quality(quality); //80.00
op.addImage(outFileName);
try {
cmd.run(op);
} catch (Exception e) {
e.printStackTrace();
}
}
}