/**
*
*/
package weibo4j.http;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.MemoryCacheImageInputStream;
import com.sun.imageio.plugins.bmp.BMPImageReader;
import com.sun.imageio.plugins.gif.GIFImageReader;
import com.sun.imageio.plugins.jpeg.JPEGImageReader;
import com.sun.imageio.plugins.png.PNGImageReader;
/**
* 临时存储上传图片的内容，格式，文件信息等
*
* @author zhulei
*
*/
public class ImageItem {
private byte[] content;
private String name;
private String contentType;
public ImageItem(String name,byte[] content) throws Exception{
String imgtype=getContentType(content);
if(imgtype!=null&&(imgtype.equalsIgnoreCase("image/gif")||imgtype.equalsIgnoreCase("image/png")
||imgtype.equalsIgnoreCase("image/jpeg"))){
this.content=content;
this.name=name;
this.contentType=imgtype;
}else{
throw new IllegalStateException(
"Unsupported image type, Only Suport JPG ,GIF,PNG!");
}
}
public byte[] getContent() {
return content;
}
public String getName() {
return name;
}
public String getContentType() {
return contentType;
}
public static String getContentType(byte[] mapObj) throws IOException {
String type = "";
ByteArrayInputStream bais = null;
MemoryCacheImageInputStream mcis = null;
try {
bais = new ByteArrayInputStream(mapObj);
mcis = new MemoryCacheImageInputStream(bais);
Iterator itr = ImageIO.getImageReaders(mcis);
while (itr.hasNext()) {
ImageReader reader = (ImageReader) itr.next();
if (reader instanceof GIFImageReader) {
type = "image/gif";
} else if (reader instanceof JPEGImageReader) {
type = "image/jpeg";
} else if (reader instanceof PNGImageReader) {
type = "image/png";
} else if (reader instanceof BMPImageReader) {
type = "application/x-bmp";
}
}
} finally {
if (bais != null) {
try {
bais.close();
} catch (IOException ioe) {
}
}
if (mcis != null) {
try {
mcis.close();
} catch (IOException ioe) {
}
}
}
return type;
}
}