用java对两个文件的内容进行排序

我有两个名为“text1”的文本文件，内容如下

1191196800.681 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D
1191196800.683 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D
1191196800.685 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D 

1191196800.682 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D
1191196800.684 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D
1191196800.686 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D 

 1191196800.681 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D
 1191196800.682 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D
 1191196800.683 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D
 1191196800.684 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D
 1191196800.685 - !AIVDM,1,1,,,13aG?N0rh20E6sjN1J=9d4<00000,0*1D

1196800.681-！AIVDM，1,1,13aG？N0rh20E6sjN1J=9d4未测试：

BufferedReader reader1 = new BufferedReader(new FileReader("file1.txt"));
BufferedReader reader2 = new BufferedReader(new FileReader("file2.txt"));
PrintWriter out = new PrintWriter ("out.txt");

String line1 = reader1.readLine();
String line2 = reader2.readLine();

while(line1 !=null && line2 != null) {
  out.println(line1);
  out.println(line2);
  line1 = reader1.readLine();
  line2 = reader2.readLine();
}

在unix计算机上：

sort -n -k1 file1 file2 > results.txt

读取这两个文件并将其存储到哈希映射中，如下所示

HashMap<Double,String> hash=new Hashmap<Double,String> ();

HashMap hash=newhashmap（）；

双人是第一部分
双精度（1191196800.681），字符串（-！AIVDM，1,1，，，13aG？N0rh20E6sjN1J=9d4将文件读入列表，调用：

Collections.sort(yourList);

然后遍历已排序的列表并将内容写入文件

读取文件示例：
写文件示例：
试试这个

读取文件1并将其存储在临时文件中，然后读取文件2并将其也存储在同一临时文件中

现在使用Scanner（即
next（）
）来读取这个临时文件，只使用next（），这将只读取每行中的第一个单词，使用
double.parseDouble（）将其转换为double。
将整行作为字符串放到
TreeSet（）
中进行比较

在文件3中写入TreeSet（）内容

最终结果将是你想要的

虽然这会很有帮助，但我也展示了我阅读和附加的方式

用于从文件中读取

File f = new File("my.txt");
FileReader fr = new FileReader(f);
BufferedReader br  = new BufferedReader(fr);

String s = null;

while ((br=readLine())!=null) {

// Do whatever u want to do with the content of the file,eg print it on console using SysOut...etc

}

br.close();

要写入文件，请执行以下操作：

Boolean isDone = true;
Scanner scan = new Scanner(System.in);
File f = new File("my.txt");
FileWriter fr = new FileWriter(f,true);
BufferedWriter br  = new BufferedWriter(fr);

while (b) {

   if (!b) {

 br.append(new Scanner(System.in).nextLine());

 }


}

下面是完成上述工作的简单程序

public class RunSysCmd {

/**Executes the Linux command necessary for sorting
 * @param String
 */
public static void main(String[] args) {

    try {
        // command to be executed
        String cmd = "/usr/bin/sort -n -k1 /home/General_DataStructure/r1.nmea /home/General_DataStructure/r2.nmea";

        // new file where the result will be stored
        BufferedWriter out = new BufferedWriter(new FileWriter(new File("/home/General_DataStructure/r3.nmea")));
        String line;

        // run the command specified in the cmd variable
        final Process process = Runtime.getRuntime().exec(cmd);

        // read the result executed by the previous command
        BufferedReader buf = new BufferedReader(new InputStreamReader(process.getInputStream()));

        // write the output of the command to new file
        while ((line = buf.readLine())!=null) {
            out.write(line);
            out.newLine();

        }

        // close the file
        buf.close();
        out.close();

        // causes the thread to wait until the process represented by this Process object the is terminated
        process.waitFor();

        // get the return value of the process. The value 0 means successful execution of the thread
        int returnCode = process.exitValue();
        System.out.println(returnCode);

    } catch (IOException e) {
        e.printStackTrace();

    }

    catch (InterruptedException e) {
        e.printStackTrace();

    }

  }// main ends here
 }

谢谢
这两个文件都已经自己排序了吗？是的，文件是自己排序的。而且，这不需要任何Java代码。在Unix和Windows中都可以通过命令行完成（尽管在Windows中有点困难）
public class RunSysCmd {

/**Executes the Linux command necessary for sorting
 * @param String
 */
public static void main(String[] args) {

    try {
        // command to be executed
        String cmd = "/usr/bin/sort -n -k1 /home/General_DataStructure/r1.nmea /home/General_DataStructure/r2.nmea";

        // new file where the result will be stored
        BufferedWriter out = new BufferedWriter(new FileWriter(new File("/home/General_DataStructure/r3.nmea")));
        String line;

        // run the command specified in the cmd variable
        final Process process = Runtime.getRuntime().exec(cmd);

        // read the result executed by the previous command
        BufferedReader buf = new BufferedReader(new InputStreamReader(process.getInputStream()));

        // write the output of the command to new file
        while ((line = buf.readLine())!=null) {
            out.write(line);
            out.newLine();

        }

        // close the file
        buf.close();
        out.close();

        // causes the thread to wait until the process represented by this Process object the is terminated
        process.waitFor();

        // get the return value of the process. The value 0 means successful execution of the thread
        int returnCode = process.exitValue();
        System.out.println(returnCode);

    } catch (IOException e) {
        e.printStackTrace();

    }

    catch (InterruptedException e) {
        e.printStackTrace();

    }

  }// main ends here
 }