TIKA提取圖像文件

下面給出的該程序是從一個JPEG圖像中提取的內容和元數據。

import java.io.File; import java.io.FileInputStream; import java.io.IOException; import org.apache.tika.exception.TikaException; import org.apache.tika.metadata.Metadata; import org.apache.tika.parser.ParseContext; import org.apache.tika.parser.jpeg.JpegParser; import org.apache.tika.sax.BodyContentHandler; import org.xml.sax.SAXException; public class JpegParse { public static void main(final String[] args) throws IOException,SAXException, TikaException { //detecting the file type BodyContentHandler handler = new BodyContentHandler(); Metadata metadata = new Metadata(); FileInputStream inputstream = new FileInputStream(new File("boy.jpg")); ParseContext pcontext = new ParseContext(); //Jpeg Parse JpegParser JpegParser = new JpegParser(); JpegParser.parse(inputstream, handler, metadata,pcontext); System.out.println("Contents of the document:" + handler.toString()); System.out.println("Metadata of the document:"); String[] metadataNames = metadata.names(); for(String name : metadataNames) { System.out.println(name + ": " + metadata.get(name)); } } }

保存上述代碼爲JpegParse.java，並通過使用下面的命令從命令提示編譯：

javac JpegParse.java
java JpegParse

在這裏，我們通過下面的example.jpeg文件：

JPEG文件具有以下屬性：

在執行上面的應用程序，會得到如下的輸出。

輸出:

Contents of the document:

Metadata of the document:
IPTC-NAA record: 92 bytes binary data
Number of Components: 3
Image Height: 1000 pixels
Resolution Units: inch
Data Precision: 8 bits
tiff:BitsPerSample: 8
Compression Type: Baseline
Component 1: Y component: Quantization table 0, Sampling factors 1 horiz/1 vert
Component 2: Cb component: Quantization table 1, Sampling factors 1 horiz/1 vert
tiff:ImageLength: 1000
Component 3: Cr component: Quantization table 1, Sampling factors 1 horiz/1 vert
X Resolution: 300 dots
tiff:ImageWidth: 714
Application Record Version: 4
Image Width: 714 pixels
Original Transmission Reference:
53616c7465645f5fd22a84941585d89cc735d889c9d5ac58a01faf2c92ee3c6f9bcb38359bbe1eef
Y Resolution: 300 dots