在 Java 中对文本文件进行排序
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/15649567/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Sorting a text file in Java
提问by user2205055
I have a text file with a list of words which I need to sort in alphabetical order using Java. The words are located on seperate lines.
我有一个包含单词列表的文本文件，我需要使用 Java 按字母顺序对这些单词进行排序。这些词位于单独的行上。
How would I go about this, Read them into an array list and then sort that??
我将如何解决这个问题，将它们读入一个数组列表，然后对其进行排序？？
回答by Jordan Dea-Mattson
This is a simple four step process, with three of the four steps addressed by Stackoverflow Questions:
这是一个简单的四步过程，Stackoverflow Questions 解决了四个步骤中的三个：
- Read each line and turn them into Java String
- Store each Java String in a Array (don't think you need a reference for this one.)
- Sort your Array
- Write out each Java String in your array
- 读取每一行并将它们转换为 Java String
- 将每个 Java 字符串存储在一个数组中（不要认为您需要对这个字符串的引用。）
- 对数组进行排序
- 写出数组中的每个 Java 字符串
回答by www.gadgetgyan.in
import java.io.*;
import java.util.*;
public class example
{
TreeSet<String> tree=new TreeSet<String>();
public static void main(String args[])
{
new example().go();
}
public void go()
{
getlist();
System.out.println(tree);
}
void getlist()
{
try
{
File myfile= new File("C:/Users/Rajat/Desktop/me.txt");
BufferedReader reader=new BufferedReader(new FileReader(myfile));
String line=null;
while((line=reader.readLine())!=null){
addnames(line);
}
reader.close();
}
catch(Exception ex)
{
ex.printStackTrace();
}
}
void addnames(String a)
{
tree.add(a);
for(int i=1;i<=a.length();i++)
{
}
}
}
回答by live-love
Here is an example using Collections sort:
这是使用集合排序的示例：
public static void sortFile() throws IOException
{
FileReader fileReader = new FileReader("C:\words.txt");
BufferedReader bufferedReader = new BufferedReader(fileReader);
List<String> lines = new ArrayList<String>();
String line = null;
while ((line = bufferedReader.readLine()) != null) {
lines.add(line);
}
bufferedReader.close();
Collections.sort(lines, Collator.getInstance());
FileWriter writer = new FileWriter("C:\wordsnew.txt");
for(String str: lines) {
writer.write(str + "\r\n");
}
writer.close();
}
You can also use your own collation like this:
您还可以像这样使用自己的排序规则：
Locale lithuanian = new Locale("lt_LT");
Collator lithuanianCollator = Collator.getInstance(lithuanian);
