[英]Text file - multiline string into one line
我正在解析txt文件並執行一些編輯任務。 我在將多行字符串更改為一行字符串時卡住了。
工作流程:1)將多行合並為一行2)提取包含一些char或startsWith的特定行
已經嘗試了一些方法,但是沒有理想的結果。
目標是具有以下行:
Jrn.Directive "WindowSize" , "[A.rvt]", "Floor Plan: Level 1" , 1912, 849
基於
Jrn.Directive "WindowSize" _
, "[A.rvt]", "Floor Plan: Level 1" _
, 1912, 849
嘗試:
line.lines().collect(Collectors.joining("_"+"[\n]"));
要么
line.replaceAll(" _\n" +
" ,");
感謝任何建議更新:
工作流程:
文字包含以下文字(這是整個txt文件的一小部分)-我無法將其粘貼為代碼,請參見屏幕截圖
Jrn.Directive“ WindowSize” _,“ [A.rvt]”,“平面圖:級別1” _,1912,849'0:<.Marshalling'0:<... CompactCaching = 1(Enabled)'0: <.ThreadPool'0:<... ActivePoolSize = 51'0:<... ConfiguredPoolSize =自動'0:<... ParallelCores = 8'0:<... RequestedPoolSize =自動'0:<.Tuning' 0:<... ElemTable = 1(多線程時除外)'0:<BC:0,0,0 Jrn.Directive“ WindowSize” _,“ [A.rvt]”,“平面圖:1級” _ ,1912,84
請查看截圖https://i.ibb.co/0cRrwcR/2019-02-03-1947.png
因為我將提取以Jrn.D等開頭的字符串, 所以我需要將其加入並獲取
Jrn.Directive“ WindowSize”,“ [A.rvt]”,“平面圖:級別1”,1912,849
我認為有必要先定義哪些行需要連接,然后提取包含有趣信息的行,例如以Jrn.D開頭的信息。
編碼Im用於查找特定st的內容
import java.io.*;
import java.util.stream.Collectors;
public class ReadFromFile {
public static void main(String [] args) {
// The name of the file to open.
String fileName = "test.txt";
// This will reference one line at a time
String line = null;
try {
// FileReader reads text files in the default encoding.
FileReader fileReader =
new FileReader(fileName);
// Always wrap FileReader in BufferedReader.
BufferedReader bufferedReader =
new BufferedReader(fileReader);
while((line = bufferedReader.readLine()) != null) {
// Im defining which lines are important for me but firstly I
//need have them in one line especially when looking for Jrn
if (line.startsWith("Jrn")||
line.contains("started recording journal file")||
line.contains("' Build:")|| line.contains("Dim Jrn"))
System.out.println(line);
}
// Always close files.
bufferedReader.close();
}
catch(FileNotFoundException ex) {
System.out.println(
"Unable to open file '" +
fileName + "'");
}
catch(IOException ex) {
System.out.println(
"Error reading file '"
+ fileName + "'");
// Or we could just do this:
// ex.printStackTrace();
}
}
}
我認為可以解決您的特定問題的最佳方式(對文件的侵入最少)是在Jrn.Directive
元信息的末尾添加定界符(*)(如果位於可能性范圍內),例如:
Jrn.Directive "WindowSize" _ , "[A.rvt]", "Floor Plan: Level 1" _ , 1912, 849*
然后,您可以使用循環來順序打印每個與定界符不匹配的令牌,並在中斷時中斷循環。
像這樣
//File object instantiation
File file = new File("test.txt");
//Iterator which loops over every line in the file
Iterator<String> iterator = Files.readAllLines(file.toPath()).iterator();
//The end delimiter for you Jrn.Directive information
String delimiter = "*";
while(iterator.hasNext()) {
//String to store current line
String line = iterator.next();
//Execute if line starts with Jrn.Directive
if (line.startsWith("Jrn")) {
//JrnLoop to serialize Jrn.Directive information
JrnLoop: while(true) {
//Splitting and processing each character in the current line
for(String token: line.split("")) {
//Escape and break the JrnLoop if the current character matches end delimiter
if (token.matches(delimiter)) {
System.out.println();
break JrnLoop;
}
//Otherwise print the current character
System.out.print(token);
}
//Go to the next line of the Jrn.Directive information
line = iterator.next();
}
}
//If the line does not start with Jrn.Directive
else {
System.out.println(line);
}
至於為什么您的Jrn.Directive信息存儲在文件中的多行中,我真的不知道
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