java中文关键词提取,Java语言关键词

本文目录一览：

• 1、java 如何在一篇文章中取出某个关键字
• 2、java编程 求一个能够从TXT文本中提取中文关键字并输出的程序
• 3、如何用java实现文本的关键字提取
• 4、java word中提取关键字
• 5、求一个提取文章关键词的java程序

java 如何在一篇文章中取出某个关键字

这个方法是取出了含有keyword的那一行，你要去关键字，只要返回true，直接取就O了！！忘楼主采纳！

public void selectKeyWord(String keyWord){

String filepath = “”;

try {

DataInputStream dis = new DataInputStream(new FileInputStream(filepath));

while(dis.read()!=-1){

String str = dis.readUTF();

if(str.contains(keyWord)){

System.out.println(str);

}

}

} catch (FileNotFoundException e) {

System.out.println(“文件不存在”);

System.exit(0);

} catch (IOException e) {

e.printStackTrace();

}

}

java编程 求一个能够从TXT文本中提取中文关键字并输出的程序

以下这个程序就是 获取到.txt中的中文，然后在控制台中输出

希望这个能帮到你啊，望采纳啊

package cn.ima_21;

import java.io.FileWriter;

import java.io.FileReader;

import java.io.IOException;

public class FileReaderDemo {

public static void main(String[] args) throws IOException {

// 创建对象

FileReader fr = new FileReader(“a.txt”);

//开发一般如下写

int num = 0;

while((num=fr.read())!=-1){

System.out.print((char)num);

}

//释放资源

fr.close();

}

}

如何用java实现文本的关键字提取

可以使用java API中的URL抓取流，也可以使用Apache的HttpClient等多种方法，最终得到的就是字符串咯，得到字符串就好办了，使用正则匹配，将匹配的保存起来就可以了

java word中提取关键字

首先，要用Java的File类中函数（如open，read等，记不清了）打开word文档，利用形式语言与自动机的原理，跳过word文档的头部，分析内容，利用String中的equals()方法匹配”java”字符串。

求一个提取文章关键词的java程序

//直接粘贴就行。

import java.awt.BorderLayout;

import java.awt.EventQueue;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.Scanner;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JFileChooser;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JSplitPane;

import javax.swing.JTextArea;

import javax.swing.border.EtchedBorder;

import javax.swing.filechooser.FileFilter;

public class Application2 extends JFrame implements Cloneable{

public Application2(){

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

this.setSize(800,700);

this.setLayout(new BorderLayout());

keyWords1=new String[]{“那么”,”还是”,”sdf”};

keyWords2=new String[]{“所以”,”而且”,};

input=new JTextArea();

JPanel ip=new JPanel();

ip.setLayout(new BorderLayout());

ip.add(input,BorderLayout.CENTER);

ip.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(EtchedBorder.LOWERED), “输入文本”));

output1=new JTextArea();

JPanel o1p=new JPanel();

o1p.setLayout(new BorderLayout());

o1p.add(output1,BorderLayout.CENTER);

o1p.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(EtchedBorder.LOWERED), “以下为”));

output2=new JTextArea();

JPanel o2p=new JPanel();

o2p.setLayout(new BorderLayout());

o2p.add(output2,BorderLayout.CENTER);

o2p.setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(EtchedBorder.LOWERED), “以下为”));

JSplitPane split1=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,o1p,o2p);

split1.setDividerLocation(350);

JSplitPane split2=new JSplitPane(JSplitPane.VERTICAL_SPLIT,ip,split1);

split2.setDividerLocation(300);

this.add(split2,BorderLayout.CENTER);

open=new JButton(“导入”);

open.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

JFileChooser chooser=new JFileChooser(“.”);

chooser.setMultiSelectionEnabled(false);

chooser.addChoosableFileFilter(new FileFilter(){

@Override

public boolean accept(File file) {

if(file.isDirectory())

return true;

int length=file.getName().length();

if(length5)

return false;

if(file.getName().substring(length-4).equals(“.txt”))

return true;

return false;

}

@Override

public String getDescription() {

return “文本文件”;

}

});

chooser.showOpenDialog(Application2.this);

File file=chooser.getSelectedFile();

if(file==null)

return;

try {

Scanner sc=new Scanner(file);

String text=””;

while(sc.hasNextLine())

text+=sc.nextLine()+”\n”;

input.setText(text);

String[] array=getSentences();

output1.setText(getKeySentences(keyWords1,array));

output2.setText(getKeySentences(keyWords2,array));

}catch (IOException e1) {

e1.printStackTrace();

}

}

});

save=new JButton(“导出”);

save.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

JFileChooser chooser=new JFileChooser(“.”);

chooser.setMultiSelectionEnabled(false);

chooser.addChoosableFileFilter(new FileFilter(){

@Override

public boolean accept(File file) {

if(file.isDirectory())

return true;

int length=file.getName().length();

if(length5)

return false;

if(file.getName().substring(length-4).equals(“.txt”))

return true;

return false;

}

@Override

public String getDescription() {

return “文本文件”;

}

});

chooser.showSaveDialog(Application2.this);

File file=chooser.getSelectedFile();

if(file==null)

return;

try {

PrintWriter pw=new PrintWriter(file);

pw.print(output1.getText());

pw.flush();

pw.print(output2.getText());

pw.flush();

}catch (IOException e1) {

e1.printStackTrace();

}

}

});

JPanel buttonPane=new JPanel();

buttonPane.add(open);

buttonPane.add(save);

this.add(buttonPane,BorderLayout.SOUTH);

}

public String[] getSentences(){

ArrayListString set=new ArrayListString();

int length=input.getText().length();

for(int i=0,last=0;ilength;i++){

String s=String.valueOf(input.getText().charAt(i));

if(s.equals(“\n”))

last=i+1;

if(s.equals(“.”)||s.equals(“,”)||s.equals(“。”)||s.equals(“。”)||s.equals(“！”)||s.equals(“？”)||s.equals(“?”)||s.equals(“!”)||s.equals(“，”)){

set.add(input.getText().substring(last,i)+s);

last=i+1;

}

}

return set.StringtoArray(new String[set.size()]);

}

public String getKeySentences(String[] key,String[] sentences){

String result=””;

A: for(int i=0;isentences.length;i++){

for (int k = 0; k key.length; k++)

if (sentences[i].contains(key[k].subSequence(0, key[k].length()))) {

result += sentences[i] + “\n”;

continue A;

}

}

return result;

}

private JTextArea input;

private JTextArea output1;

private JTextArea output2;

private JButton open;

private JButton save;

private String[] keyWords1;

private String[] keyWords2;

public static void main(String… args){

EventQueue.invokeLater(new Runnable(){

public void run(){

new Application2().setVisible(true);

}

});

}

}