追加多個文件到一個

Question

我在像一些地點4個不同的文件： d：\的1.txt d：\ 2.txt d：\ 3.txt和 d：\ 4.txt

我需要創建一個新文件爲NewFile.txt，它應該包含上述文件中存在的所有內容1.txt，2.txt，3.txt 4.txt .......

所有數據都應該出現在New Single文件中（NewFile.txt）..

請給我建議一些做法AME在Java或Groovy ....

Answer 1

這裏是做在Groovy的一種方式：

// Get a writer to your new file 
new File('/tmp/newfile.txt').withWriter { w -> 

    // For each input file path 
    ['/tmp/1.txt', '/tmp/2.txt', '/tmp/3.txt'].each { f -> 

    // Get a reader for the input file 
    new File(f).withReader { r -> 

     // And write data from the input into the output 
     w << r << '\n' 
    } 
    } 
} 

做這種方式（通過調用每個源文件的getText）的優點是它在將其內容寫入newfile之前，不需要將整個文件加載到內存中。如果你的一個文件很龐大，另一種方法可能會失敗。

Answer 2

這是常規

def allContentFile = new File("D:/NewFile.txt") 
def fileLocations = ['D:/1.txt' , 'D:/2.txt' , 'D:/3.txt' , 'D:/4.txt'] 
fileLocations.each{ allContentFile.append(new File(it).getText()) } 

Answer 3

我顯示你是用Java做的方式：

public class Readdfiles { 
    public static void main(String args[]) throws Exception 
    { 
    String []filename={"C:\\WORK_Saurabh\\1.txt","C:\\WORK_Saurabh\\2.txt"}; 
    File file=new File("C:\\WORK_Saurabh\\new.txt"); 
    FileWriter output=new FileWriter(file); 
    try 
    { 
     for(int i=0;i<filename.length;i++) 
     { 
     BufferedReader objBufferedReader = new BufferedReader(new FileReader(getDictionaryFilePath(filename[i]))); 

     String line; 
     while ((line = objBufferedReader.readLine())!=null) 
     { 
      line=line.replace(" ",""); 

      output.write(line); 
     } 
     objBufferedReader.close(); 
     } 
     output.close(); 
    } 
    catch (Exception e) 
    { 
     throw new Exception (e); 
    } 
    } 

    public static String getDictionaryFilePath(String filename) throws Exception 
    { 
    String dictionaryFolderPath = null; 
    File configFolder = new File(filename); 
    try 
    { 
     dictionaryFolderPath = configFolder.getAbsolutePath(); 
    } 
    catch (Exception e) 
    { 
     throw new Exception (e); 
    } 
    return dictionaryFolderPath; 
    } 
} 

告訴我，如果您有任何疑問

Answer 4

你可以做像Java這樣的東西。希望它可以幫助你解決你的問題：

import java.io.*; 
class FileRead { 
public void readFile(String[] args) { 
for (String textfile : args) { 

try{ 
     // Open the file that is the first 
     // command line parameter 
     FileInputStream fstream = new FileInputStream(textfile); 
     // Get the object of DataInputStream 
     DataInputStream in = new DataInputStream(fstream); 
     BufferedReader br = new BufferedReader(new InputStreamReader(in)); 
     String strLine; 
     //Read File Line By Line 
     while ((strLine = br.readLine()) != null) { 
     // Print the content on the console 
     System.out.println (strLine); 

    // Write to the new file 
     FileWriter filestream = new FileWriter("Combination.txt",true); 
     BufferedWriter out = new BufferedWriter(filestream); 
     out.write(strLine); 
     //Close the output stream 
     out.close(); 

     } 
     //Close the input stream 
     in.close(); 
     }catch (Exception e){//Catch exception if any 
     System.err.println("Error: " + e.getMessage()); 
     } 
} 
} 

public static void main(String args[]) { 
FileRead myReader = new FileRead(); 
String fileArray[] = {"file1.txt", "file2.txt", "file3.txt", "file4.txt"}; 
    myReader.readFile(fileArray); 

    } 
} 

Answer 5

一個襯墊例如：

def out = new File(".all_profiles") 
['.bash_profile', '.bashrc', '.zshrc'].each {out << new File(it).text} 

OR

['.bash_profile', '.bashrc', '.zshrc'].collect{new File(it)}.each{out << it.text} 

蒂姆的實現是更好，如果你有大的文件。

Answer 6

我試圖解決這個，我發現它很容易，如果你的內容複製到陣列和陣列寫入不同的文件

public class Fileread 
{ 

public static File read(File f,File f1) throws FileNotFoundException 
{ 

    File file3=new File("C:\\New folder\\file3.txt"); 
    PrintWriter output=new PrintWriter(file3); 
    ArrayList arr=new ArrayList(); 
    Scanner sc=new Scanner(f); 
    Scanner sc1=new Scanner(f1); 
    while(sc.hasNext()) 
    { 
     arr.add(sc.next()); 

    } 
    while(sc1.hasNext()) 
    { 
     arr.add(sc1.next()); 

    } 
     output.print(arr); 
    output.close(); 

    return file3; 
} 
/** 
* 
* @param args 
* @throws FileNotFoundException 
*/ 
public static void main(String[] args) { 
    try 
    { 
    File file1=new File("C:\\New folder\\file1.txt"); 
    File file2=new File("C:\\New folder\\file2.txt"); 
    File file3=read(file1,file2); 
    Scanner sc=new Scanner(file3); 
    while(sc.hasNext()) 
     System.out.print(sc.next()); 

    } 
    catch(Exception e) 
    { 
     System.out.printf("Error :%s",e); 
    } 
} 
}