基于外部文本输入读写多个文件

下面的可运行代码基本上就是这样：

    
      package maketestcfg_cm;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
public class MakeTestCfg_CM {
public static void main(String[] args) {
    String suppliedDataFile = args[0];
    if (suppliedDataFile.isEmpty() || suppliedDataFile.equals("")) {
        return;
    }
    // Variable to hold the actual System line separator
    String ls = System.lineSeparator();
    // A html template used to write to files in a single write.
    // Note we use tags instead of variables. These tags are 
    // replaced when we write to whichever file. The tags are:
    // %c% = City | %l% = Link | %n% = Node Name | %g% = GIS
    String htmlTemplate = " <TABLE>" + ls + 
                          "   <TR><TD>City:</TD><TD><b>%c%</b></TD></TR>" + ls +
                          "   <TR><TD>Node Name:</TD><TD>%n%</TD></TR>" + ls + 
                          "   <TR><TD>GIS:</TD><TD>%g%</TD></TR>" + ls + 
                          "   <TR><TD>Link:</TD><TD>%l%</TD></TR>" + ls +
                          " </TABLE>" + ls + ls;
    try {
        // Prepare to read the data file.
        // Place each line in the data file into a ArrayList.
        List<String> list = new ArrayList<>();
        String line;
        int counter = 0;
        try (BufferedReader input = new BufferedReader(new FileReader(suppliedDataFile))) {
            while ((line = input.readLine()) != null) {
                // Ignore lines that contain nothing and ignore
                // the first line which is a CSV header line.
                line = line.trim();
                if (line.equals("") || counter == 0) {
                    counter++;
                    continue;
                }
                list.add(line);
            }
        }
        // Each data file line is now contained within a 
        // List interface named 'list'. Now we process
        // each line (List element):
        for (int i = 0; i < list.size(); i++) {
            // Parse the current line into a String Array
            String[] City_Link_NodeName_GIS = list.get(i).split(",");
            // Get the GIS & trim off leading/trailing spaces (if any).
            String gis = City_Link_NodeName_GIS[3].trim();
            // Create the file name
            String currentFileName = gis + ".txt";
            File file = new File(currentFileName);
            // if file doesnt exists, then create it
            if (!file.exists()) {
                file.createNewFile();
            }
            // Append to file...
            try ( FileWriter fw = new FileWriter(file.getAbsoluteFile(), true); 
                  BufferedWriter bw = new BufferedWriter(fw)) {
                  // Here we replace the tags in template 
                  // with proper values. Notice that all element
                  // data is trimmed of leading/trailing whitespace
                  // (just in case).
                  bw.write(htmlTemplate.
                        replace("%c%", City_Link_NodeName_GIS[0].trim()).
                        replace("%n%", City_Link_NodeName_GIS[2].trim()).
                        replace("%g%", City_Link_NodeName_GIS[3].trim()).
                        replace("%l%", City_Link_NodeName_GIS[1].trim()));
            }
        }
    }
    catch (FileNotFoundException ex) {
        Logger.getLogger(MakeTestCfg_CM.class.getName()).log(Level.SEVERE, null, ex);
    }
    catch (IOException ex) {
        Logger.getLogger(MakeTestCfg_CM.class.getName()).log(Level.SEVERE, null, ex);
    }
}
}
</code>