Java中的 ParseContextClass

ParseContext类是Java包 org.apache.tika.parser 的一个组件，用于解析上下文并将其传递给Tika （Apache Tika 工具包检测并从一千多种不同的文件类型中提取元数据和文本）解析器org.apache.tika.parser.ParseContext实现了一个 Serializable 接口。

public class ParseContext extends Object implements Serializable

构造函数：

1. ParseContext() – ParseContext() 初始化 ParseContext 类的一个新实例。

ParseContext p = new ParseContext()

Note: p is the new instance of ParseContext class.

ParseContext 的方法——

S.No.	Method	Description	Return Type
1.	getDocumentBuilder()	getDocumentBuilder() returns the DOM builder specified in this parsing context.	DocumentBuilder
2.	getSAXParser()	getSAXParser() returns the SAX parser specified in this parsing context.	SAXParser
3.	getSAXParserFactory()	getSAXParserFactory() returns the SAX parser factory specified in this parsing context.	SAXParserFactory
4.	getTransformer()	getTransformer() returns the transformer specified in this parsing context.	Transformer
5.	getXMLInputFactory()	getXMLInputFactory() returns the StAX input factory specified in this parsing context.	XMLInputFactory
6.	getXMLReader()	getXMLReader() returns the XMLReader specified in this parsing context.	XMLReader
7.	get(Class key)	get(Class key) returns the object in this context that implements the given interface.	T
8.	get(Class key, T defaultValue)	get(Class key, T defaultValue)  returns the object in this context that implements the given interface.	T
9.	set(Class key, T value)	set(Class key, T value)  adds the given value to the context to implement the given interface.	void

例子：

Java

// Java Program To Get Content of the
// document using Tika Toolkit and 
// ContextParser:
import java.io.*;
  
// importing File class
import java.io.File.*;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.txt.TXTParser;
import org.apache.tika.sax.BodyContentHandler;
// import the necessary Tika packages
import org.xml.sax.SAXException;
  
class GFG {
    public static void main(String[] args)
    {
        // new instance of FIle is created
        File fileName = new File("tmp.txt");
        
        // new instance of FileInputStream is created for
        // reading purpose
        FileInputStream fileInputStream
            = new FileInputStream(fileName);
        
        // new instance of parseContext class is created
        ParseContext parseContext = new ParseContext();
        
        // new instance of MetaData is created
        MetaData metaData = new MetaData();
        
        // new instance of TXTParser is created for plain
        // text parsing purpose
        TXTParser textParser = new TXTParser();
        
        // new instance of BodyContentHandler is created
        BodyContentHandler bodyContentHandler
            = new BodyContentHandler();
        
        // TXTParser parse method is called for parsing a
        // document stream into sequence of XHTML SAX events.
        textParser.parse(fileInputStream,
                         bodyContentHandler, metaData,
                         parseContext);
  
        System.out.println("Contents of the document:"
                           + bodyContenthandler.toString());
    }
}

输出-

Contents of the document:GFG is the best website for programmer

注 – tmp.txt文件包含以下数据。