Question

我这里有一个代码，它接受一个文件的输入，并且只向控制台显示包含单词“LANTALK”的某些行，然后将这些行写出到外部文件。我需要的是能够过滤行内的信息以便以某种方式显示。

以下是完整代码：

import java.io.*;
import java.util.*;

public class baseline 
{

   // Class level variables
   static Scanner sc = new Scanner(System.in); 

   public static void main(String[] args) throws IOException, 
   FileNotFoundException { // Start of main

   // Variables  
   String filename;

   // Connecting to the output file with a buffer
   PrintWriter outFile = new PrintWriter(
                          new BufferedWriter(
                           new FileWriter("chatOutput.log")));

   // Get the input file
   System.out.print("Please enter full name of the file: ");
   filename = sc.next();

   // Assign the name of the input file to a file object
   File log = new File(filename);
   String textLine = null; // Null
   String outLine = "";    // Null
   BufferedWriter bw = null;



  try
  {
  // assigns the input file to a filereader object
     BufferedReader infile = new BufferedReader(new FileReader(log));

      sc = new Scanner(log);
            while(sc.hasNext())
            {
                String line=sc.nextLine();
                if(line.contains("LANTALK"))
                    System.out.println(line);
            } // End of while


  try
   {
     // Read data from the input file
    while((textLine = infile.readLine()) != null)
     {
       // Print to output file
       outLine = textLine;
       sc = new Scanner (outLine);
             while(sc.hasNext())
          {
               String line=sc.nextLine();
               if(line.contains("LANTALK"))
                outFile.printf("%s\n",outLine);
          }// end of while 
      } // end of while
    } // end of try


    finally  // This gets executed even when an exception is thrown 
       {
     infile.close();
     outFile.close();
       } // End of finally
     } // End of try


   catch (FileNotFoundException nf) // Goes with first try
   {
    System.out.println("The file \""+log+"\" was not found"); 
   } // End of catch
   catch (IOException ioex) // Goes with second try
   {
    System.out.println("Error reading the file");
   } // End of catch

  } // end of main

 } // end of class

以下是输入文件的示例行：

08:25:26.668 [D] [T:000FF4] [F:LANTALK2C] <CMD>LANMSG</CMD>
<MBXID>1124</MBXID><MBXTO>5760</MBXTO><SUBTEXT>LanTalk</SUBTEXT><MOBILEADDR>
</MOBILEADDR><LAP>0</LAP><SMS>0</SMS><MSGTEXT>but didn't give me the info I 
needed</MSGTEXT>
08:25:26.672 [+] [T:000FF4] [S:1:1:1124:5607:5] LANMSG [0/2 | 0]

以下是我试图让输出看起来像：

8:25:00 AM [Steve Jobs] to [John Smith] but didn't give me the info I needed

有没有人对最佳方法有任何建议？我正在考虑某种XML解析器，但是正在读取的文件是.log，我不确定如何在这个实例中转换它，因为它已经被读取了。谢谢！

Answer 1

您需要一种混合方法：从缓冲读取器读取具有LANTALK的行，然后从第一个＆lt;到最后一个＆gt;。之后，jsoup可以为你做xml技巧

修改

从这里下载jsoup

https://mvnrepository.com/artifact/org.jsoup/jsoup/1.8.3

然后在你的if块中只使用String indexOf和lastIndexOf，直到你在日志行中读取xml（将其放入字符串生成器）

将日志文件解析为XML

1 个答案: