java - 格式化 .txt 文件中的文本

Question

我必须为这样的文本文件创建一个小程序:

hello_this_is_a_test_Example_
 this line has to go up because it has a space at the beginning
 this one too
this is the next line because there's no space at the start
 this one has to connect with the first line 

希望你明白。

所以最后，它应该将格式化的文本保存在这样的文件中:

hello_this_is_a_test_Example_ this line has to go up because it has a space at the beginning this one too
this is the next line because there's no space at the start this one has to connect with te upper again

基本上，如果该行在每个字符串的开头都有一个空格字符，则它必须与顶行相连。我已经有了 GUI 来选择两个文件，只需要算法。提前谢谢你:D

我现在有这个，但它把所有内容都放在一行中。这是不对的:

public class Engine {

    public void Process(String fileIn,String fileOut) throws IOException{
        System.out.println("[Info]--> Processign");
        System.out.println("[Info]--> FileIn = " + fileIn);
        System.out.println("[Info]--> FileOut = " + fileOut);
        FileWriter Writer = new FileWriter(fileOut);

        BufferedReader br = new BufferedReader(new FileReader(fileIn));
        String line;
        String modified;
        while ((line = br.readLine()) != null) {
         System.out.println(line);
            Writer.write(line);
         if(line.startsWith(" ")){
            modified = line.replaceAll("\n ", " ");
            Writer.write(modified);
         }
        } 
        br.close();
        Writer.close();}    
    }

Answer 1

试试这个:

String modified = yourString.replaceAll("\n ", " ");

尝试这样的事情:

StringBuilder builder = new StringBuilder();
foreach (string line in Files.ReadAllLines(@"c:\myfile.txt"))
{
    builder.append(line);
}
String modified = builder.toString().replaceAll("\n ", " ");
FileWriter fw = new FileWriter(@"c:\myfile.txt");
fw.write(modified);
fw.close();