行。我想出了如何使用Apache Tika搜索它可以处理的一些文件类型,而不提供比tika-example
中存在的代码更多的代码:
public class MyFirstTika {
public static boolean contains(File file, String s) throws MalformedURLException,
IOException, MimeTypeException, SAXException, TikaException{
ContentHandler handler = new BodyContentHandler();
MimeTypes mimeRegistry = TikaConfig.getDefaultConfig().getMimeRepository();
Detector mimeDetector = (Detector) mimeRegistry;
LanguageIdentifier lang = new LanguageIdentifier(new LanguageProfile(FileUtils.readFileToString(file)));
Parser parser = TikaConfig.getDefaultConfig().getParser(MediaType.parse(mimeRegistry.getMimeType(file).getName()));
Metadata parsedMet = new Metadata();
parser.parse(file.toURI().toURL().openStream(), handler,parsedMet, new ParseContext());
return handler.toString().toLowerCase().contains(s.toLowerCase());
}
public static void main(String[] args) throws Exception
{
String searchString = "champion";
String filename = "schedule.pdf"; //test.docx";//"meds.xlsx";//Test2.Doc";
File file = new File(filename);
System.out.println(file + " contains " + searchString + ": "
+ contains(file, searchString));
}
}
以上可以判断以下文件类型是否包含单词或短语: .DOC .DOCX .XLSX .PDF 。文本 html的
它不适用于.java
个文件或.xml
个文件。
(a)我该怎么做我想查看扩展名为.java
或.xml
的文字文件是否包含字词或短语?
(b)这些不是我经常创建或编辑的唯一文件类型。有没有办法让Apache Tika检测文件是否是文本文件而没有指定其扩展名?
编辑背景:我为Windows编写了一个比搜索命令更好的搜索程序。现在我正在尝试在模式匹配的文件中添加特定文本的搜索。
修改
当我在void
中搜索Copy.java
时,以下是该程序的输出(已修改为提供以下信息):
Examining: [copy.java]
The MIME type (based on filename) is: [text/x-java-source]
The MIME type (based on MAGIC) is: [application/octet-stream
The MIME type (based on the Detector interface) is: [text/plain]
The language of this content is: [et]
Parsed Metadata:
Parsed Text:
copy.java contains void: false
那为什么没找到void
? (答案:因为找不到任何Parsed Metadata
或Parsed Text
,但为什么找不到?它应该显示整个文件。
我将copy.java
复制到copy.txt
。程序DID找到void
。将build.xml
复制到build.txt
时也发生了同样的事情。
也许此添加的信息有助于回答以下问题:“如何处理.java
和.xml
以及.c
等其他文本文件?”
请注意搜索copy.TXT
:
run:
Examining: [copy.TXT]
The MIME type (based on filename) is: [text/plain]
The MIME type (based on MAGIC) is: [application/octet-stream
The MIME type (based on the Detector interface) is: [text/plain]
The language of this content is: [et]
解析元数据:
Content-Encoding=UTF-8 Content-Type=text/plain; charset=UTF-8
解析文字:
public static void main(String[] args) throws IOException {
EventQueue.invokeLater(new Runnable()
{ @Override
public void run() {
insUserIO = new UserIO();
}
}
);
}
copy.TXT contains void: true
BUILD SUCCESSFUL (total time: 1 second)
完整修订的计划
package org.apache.tika.example;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import org.apache.commons.io.FileUtils;
import org.apache.tika.config.TikaConfig;
import org.apache.tika.detect.Detector;
import org.apache.tika.exception.TikaException;
import org.apache.tika.language.LanguageIdentifier;
import org.apache.tika.language.LanguageProfile;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MediaType;
import org.apache.tika.mime.MimeTypeException;
import org.apache.tika.mime.MimeTypes;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.Parser;
import org.apache.tika.sax.BodyContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
public class MyFirstTika {
static boolean debugging = true;
public static boolean contains(File file, String s) throws MalformedURLException, IOException, MimeTypeException, SAXException, TikaException{
ContentHandler handler = new BodyContentHandler();
MimeTypes mimeRegistry = TikaConfig.getDefaultConfig()
.getMimeRepository();
if(debugging) System.out.println("Examining: [" + file + "]");
if(debugging) System.out.println("The MIME type (based on filename) is: ["
+ mimeRegistry.getMimeType(file.toString()) + "]");
if(debugging) System.out.println("The MIME type (based on MAGIC) is: ["
+ mimeRegistry.getMimeType(file + "]"));
Detector mimeDetector = (Detector) mimeRegistry;
if(debugging) System.out
.println("The MIME type (based on the Detector interface) is: ["
+ mimeDetector.detect(file.toURI().toURL()
.openStream(), new Metadata()) + "]");
LanguageIdentifier lang = new LanguageIdentifier(new LanguageProfile(
FileUtils.readFileToString(file)));
if(debugging) System.out.println("The language of this content is: ["
+ lang.getLanguage() + "]");
Parser parser = TikaConfig.getDefaultConfig().getParser(
MediaType.parse(mimeRegistry.getMimeType(file).getName()));
Metadata parsedMet = new Metadata();
parser.parse(file.toURI().toURL().openStream(), handler,
parsedMet, new ParseContext());
if(debugging) System.out.println("Parsed Metadata: ");
if(debugging) System.out.println(parsedMet);
if(debugging) System.out.println("Parsed Text: ");
if(debugging) System.out.println(handler.toString());
return handler.toString().toLowerCase().contains(s.toLowerCase());
}
public static void main(String[] args) throws Exception
{
File file = new File(filename);
System.out.println(file + " contains " + searchString + ": "
+ contains(file, searchString));
}
static String searchString = "void";
static String filename = "copy.TXT";
}
答案 0 :(得分:1)
非常感谢@Gagravarr指导我AutoDetectParser
!
下面的小程序在" text"的所有类型中找到了文本。 (人类可读)(和其他 - 例如,.doc*
)文件,包括private.properties
,ParsingExample.java
(本身!),test.doc
,test.pdf
(已生成)通过Word),gradlew.bat
等等。
package org.apache.tika.example;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MimeTypeException;
import org.apache.tika.parser.AutoDetectParser;
import org.apache.tika.sax.BodyContentHandler;
import org.xml.sax.SAXException;
public class ParsingExample {
public static boolean contains(File file, String s) throws MalformedURLException,
IOException, MimeTypeException, SAXException, TikaException
{
InputStream stream = new FileInputStream(file);
AutoDetectParser parser = new AutoDetectParser();
BodyContentHandler handler = new BodyContentHandler(-1);
Metadata metadata = new Metadata();
try{
parser.parse(stream, handler, metadata);
return handler.toString().toLowerCase().contains(s.toLowerCase());
}
catch (IOException | SAXException | TikaException e){
System.out.println(file + ": " + e + "\n");
return false;
}
}
public static void main(String[] args)
{
try {
System.out.println("File " + filename + " contains <" + searchString + "> : "
+ contains(new File(filename), searchString));
} catch (IOException | SAXException | TikaException ex){
System.out.println("Error: " + ex);
}
}
static String parseExample = ":(";
static String searchString = "slom";
static String filename = "C:\\Users\\Dov\\x.pdf";
}
/**
* Example of how to use Tika to parse a file when you do not know its file type
* ahead of time.
*
* AutoDetectParser attempts to discover the file's type automatically, then call
* the exact Parser built for that file type.
*
* The stream to be parsed by the Parser. In this case, we get a file from the
* resources folder of this project.
*
* Handlers are used to get the exact information you want out of the host of
* information gathered by Parsers. The body content handler, intuitively, extracts
* everything that would go between HTML body tags.
*
* The Metadata object will be filled by the Parser with Metadata discovered about
* the file being parsed.
*
* Note: This example will extract content from the outer document and all
* embedded documents. However, if you choose to use a {@link ParseContext},
* make sure to set a {@link Parser} or else embedded content will not be
* parsed.
*
* @return The content of a file.
* I let Netbeans add next 3 lines:
* @throws java.io.IOException
* @throws org.xml.sax.SAXException
* @throws org.apache.tika.exception.TikaException
*/