net.gdface.utils.FaceUtilitsX Maven / Gradle / Ivy
package net.gdface.utils;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.MemoryCacheImageInputStream;
public class FaceUtilitsX {
/**
* 通过 {@link ImageIO#getImageReaders(Object)}获取图像类型，返回文件格式名,如"jpeg","gif"
* 用于保存图像文件时的后缀名
* @param img 图像数据
* @return 图像文件格式
* @throws IllegalArgumentException {@code img}为null或空字符串""
* @throws IOException
* @see ImageIO#getImageReaders(Object)
* @see ImageReader#getFormatName()
*/
public static String getFormatName(byte[] img) throws IllegalArgumentException, IOException{
Assert.notEmpty(img, "img");
Iterator it = ImageIO.getImageReaders(new MemoryCacheImageInputStream(
new ByteArrayInputStream(img)));
if (!it.hasNext())
throw new IOException("UNRECOGNIZED IMG FORMAT");
ImageReader reader = it.next();
try{
return reader.getFormatName();
}finally{
reader.dispose();
}
}
/**
* 当类被加载的时候,根据环境变量‘is_building’判断当前是运行状态还是代码编译构建状态
* 如果没有定义环境变量，则默认为false
*
* @return 当前是代码编译构建状态返回{@code true},否则返回{@code false}
*/
public static final boolean isBuilding() {
if (null == FaceUtilitsX.IS_BUILDING) {
FaceUtilitsX.IS_BUILDING = Boolean.valueOf(FaceUtilitsX.getRuntimeProperty("is_building"));
}
return FaceUtilitsX.IS_BUILDING;
}
private static Boolean IS_BUILDING=null;
/**
* 通过环境变量CATALINA_HOME,获取axis2/WEB-INF/conf的位置
* 如果没有定义CATALINA_HOME或没有找到/webapps/axis2/WEB-INF/conf,则抛出{@link FileNotFoundException}
* @return 返回conf文件夹位置
* @throws FileNotFoundException
*/
public static File getAxis2Conf() throws FileNotFoundException{
String tomcat=System.getenv("CATALINA_HOME");
if(Judge.isEmpty(tomcat))
throw new FileNotFoundException("NOT DEFINED environment variable CATALINA_HOME,can't locate configuration file");
File conf = new File(tomcat+"/webapps/axis2/WEB-INF/conf");
if(!conf.exists()||!conf.isDirectory())
throw new FileNotFoundException(String.format("NOT FOUND %s for configuration file",conf));
return conf;
}
/**
* 当类被加载的时候,根据环境变量‘notLoadCodeTable’判断是否要加载code表
* 如果没有定义环境变量，则默认为false
* @return true/false
*/
public static final boolean notLoadCodeTable() {
return Boolean.valueOf(FaceUtilitsX.getRuntimeProperty("notLoadCodeTable"));
}
public static final String getRuntimeProperty(String key){
String value = System.getProperty(key);
if (null == value)
value = System.getenv(key);
System.out.printf("environment variable(java property) %s=%b\n", key, Boolean.valueOf(value));
return value;
}
}