Wie liest man Gruppenwerte in der Eigenschaftendatei mit Java?

Question

Beispiel der Immobilie:

Label1=DataSet1 
Label1.Col1=val1 
Label1.Col2=val2 
Label1.Col3=val3 
Label1.Col4=val4 

Label2=DataSet2 
Label2.Col1=val1 
Label2.Col2=val2 
Label2.Col3=val3 
Label2.Col4=val4 

Wenn ich will DataSet 1 & 2-Daten lesen. Ich sollte die entsprechenden Schlüssel & Werte erhalten. Wie kann ich diesen Code in Java machen? Kannst du mir bitte helfen.

DataSet1:

Col1=val1 
Col2=val2... 

Answer 1

Try this:

ReadGroupLevel.txt:

Label1=DataSet1 
Label1.Col1=val1 
Label1.Col2=val2 
Label1.Col3=val3 
Label1.Col4=val4 

Label2=DataSet2 
Label2.Col1=val1 
Label2.Col2=val2 
Label2.Col3=val3 
Label2.Col4=val4 

Label3=DataSet3 
Label3.Col1=val1 
Label3.Col4=val4 

Label4=DataSet4 
Label4.Col1=val1 
Label4.Col2=val2 
Label4.Col3=val3 
Label4.Col4=val4 

Code:

import java.io.BufferedReader; 
import java.io.FileReader; 
import java.io.IOException; 
import java.util.HashMap; 
import java.util.Map; 



public class readGroupLevel { 

    static Map<Integer,String> dataset = new HashMap<Integer, String>(); 

    public static void main(String[] args) throws IOException { 
     // 1 - Read the file and sore it in "dataset" 
     readFile(); 

     // 2 - Get content of dataset 
     System.out.println("Dataset 1:"); 
     System.out.println(dataset.get(1)); 

     System.out.println("Dataset 2:"); 
     System.out.println(dataset.get(2)); 

     System.out.println("Dataset 3:"); 
     System.out.println(dataset.get(3)); 

     System.out.println("Dataset 4:"); 
     System.out.println(dataset.get(4)); 

     System.out.println("Dataset 5:"); 
     System.out.println(dataset.get(5)); 

    } 

    /** 
    * Reads the file and store it in dataset 
    * @throws IOException 
    */ 
    private static void readFile() throws IOException{ 

     // Read the file 
     FileReader in = new FileReader("src/ReadGroupLevel.txt"); 
     BufferedReader br = new BufferedReader(in); 

     // Current line 
     String line; 

     // Number of dataset find 
     int numberDataset = -1; 

     // Content of current dataset 
     String contentDataset=""; 

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

      // Find line "Label1=DataSet1" 
      if(line.contains("DataSet")){ 

       if(numberDataset!=-1){ 
        // Fill data 
        dataset.put(numberDataset, contentDataset); 
        contentDataset = ""; 
        numberDataset=-1; 
       } 

       // Split line "Label1=DataSet1" by "=" and get number 
       String[] split = line.split("="); 
       String nameDataset=split[1]; 
       try{ 
        numberDataset = Integer.parseInt(nameDataset.replace("DataSet", "")); 
       }catch(Exception e){ 
        numberDataset = -1; 
       } 
      }else if(numberDataset!=-1){ 
       // Get content 
       contentDataset = contentDataset+line+"\n"; 
      } 
     } 

     // Last dataset content 
     if(numberDataset!=-1){ 
      dataset.put(numberDataset, contentDataset); 
     } 

     in.close(); 
    } 

} 

Ausgang:

Dataset 1: 
Label1.Col1=val1 
Label1.Col2=val2 
Label1.Col3=val3 
Label1.Col4=val4 


Dataset 2: 
Label2.Col1=val1 
Label2.Col2=val2 
Label2.Col3=val3 
Label2.Col4=val4 


Dataset 3: 
Label3.Col1=val1 
Label3.Col4=val4 


Dataset 4: 
Label4.Col1=val1 
Label4.Col2=val2 
Label4.Col3=val3 
Label4.Col4=val4 

Dataset 5: 
null