使用Jsoup在html文件中搜索字符串

问题描述

任何人都可以帮助我使用Jsoup或任何其他方法在HTML文件中搜索特定字符串.有内置的方法，但是它们可以帮助提取特定标签内的标题或脚本文本，而不是通常的字符串.在这段代码中，我使用了一种这样的内置方法从html页面提取标题.但是我想搜索一个字符串.

Can anyone help me with searching for a particular string in HTML file using Jsoup or any other method. There are inbuilt methods but they help in extracting title or script texts inside a specific tags and not string in general.In this code I have used one such inbuilt method to extract title from the html page.But I want to search a string instead.

package dynamic_tester;
import java.io.File;
import java.io.IOException;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
public class tester {
    public static void main(String args[])
    {
Document htmlFile = null;
{
try {
    htmlFile = Jsoup.parse(new File("x.html"), "ISO-8859-1");

}
catch (IOException e)
{
    e.printStackTrace();
}
String title = htmlFile.title();
System.out.println("Title = "+title);
}
}
}

推荐答案

这里是一个示例.它将HTML文件读取为文本字符串，然后对该字符串执行搜索.

Here's a sample. It reads the HTML file as text String and then performs search on that String.

package com.example;

import java.io.FileInputStream;
import java.nio.charset.Charset;

public class SearchTest {
    public static void main(String[] args) throws Exception {

        StringBuffer htmlStr = getStringFromFile("test.html", "ISO-8859-1");
        boolean isPresent = htmlStr.indexOf("hello") != -1;

        System.out.println("is Present ? : " + isPresent);
    }

    private static StringBuffer getStringFromFile(String fileName, String charSetOfFile) {
        StringBuffer strBuffer = new StringBuffer();
        try(FileInputStream fis = new FileInputStream(fileName)) {
            byte[] buffer = new byte[10240]; //10K buffer;
            int readLen = -1;

            while( (readLen = fis.read(buffer)) != -1) {
                strBuffer.append( new String(buffer, 0, readLen, Charset.forName(charSetOfFile)));
            }

        } catch(Exception ex) {
            ex.printStackTrace();
            strBuffer = new StringBuffer();
        }

        return strBuffer;
    }
}

这篇关于使用Jsoup在html文件中搜索字符串的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！