java - java接收html网页时出错

Question

下面的代码用于获取 html 网页

import java.net.*;
import java.io.*;
import java.io.File;  // Import the File class
import java.io.IOException;  // Import the IOException class to handle errors

public class TestClass2 {
    
  public static void main(String[] args) throws Exception {


 
    try{
      URL url = new URL("https://stackoverflow.com/");
      
      HttpURLConnection urlConnection=(HttpURLConnection)url.openConnection(); 

      BufferedReader reader = new BufferedReader( new InputStreamReader(url.openStream()));
      String line;
      while ((line = reader.readLine()) != null)
      {
        System.out.println(line+"\n");
      }
      reader.close();
    }catch(Exception ex){
      System.out.println(ex);
    }
    
  }
}

但是在编译和运行时会出现以下错误:
javax.net.ssl.SSLException:收到致命警报:protocol_version。
如何解决？
谢谢。

Answer 1

这可能是 SSL 证书已过期？您是否尝试过使用 HttpsURLConnection？先试试这个
修订代码

import java.net.*;
import java.io.*;
import java.io.File;  // Import the File class
import java.io.IOException;  // Import the IOException class to handle errors

public class TestClass2 {
    
  public static void main(String[] args) throws Exception {


 
    try{
      URL url = new URL("https://stackoverflow.com/");
      
      HttpsURLConnection urlConnection=(HttpsURLConnection)url.openConnection(); 

      BufferedReader reader = new BufferedReader( new InputStreamReader(url.openStream()));
      String line;
      while ((line = reader.readLine()) != null)
      {
        System.out.println(line+"\n");
      }
      reader.close();
    }catch(Exception ex){
      System.out.println(ex);
    }
    
  }
}