我无法调试这个小应用程序。代码应该是
我一直在第91行收到错误,目前,notes.txt只显示:
标识,标签,编号 标记,标记,
不是实际的标签。我觉得循环中有些东西是错误的,但我不知道如何纠正这个问题。我还考虑使用此链接中演示的方法重写BufferedWriter + Writer代码:
http://tutorials.jenkov.com/java-io/bufferedwriter.html
但我不确定这是否是问题。如果你有关于如何(在哪里)寻找解决方案的任何指示,请告诉我。
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* and open the template in the editor.
*/
package Lecture4;
import Lecture3.*;
import com.csvreader.CsvReader;
import com.google.common.collect.HashMultiset;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Arrays;
/**
*
* @author doyinue
*/
public class ReadingACSVFile1 {
private static String tagsOfTheCurrentPicture;
private static String oneLine;
private static String[] myTagsAsAnArray;
private static char[] firstTag;
/**
* @param args the command line argumentsileReader myFileReader = new
* FileReader(myfile);
*
*
*
*
*
* }
* }
*
*/
@SuppressWarnings("empty-statement")
public static void main(String[] args) throws FileNotFoundException, IOException {
// TODO code application logic here
String myfile;
myfile = "D:\\Learning\\EUR - Handling Digital Data\\Resources\\rotterdam_erasmus.csv";
FileReader myFileReader = new FileReader(myfile);
BufferedReader myBufferedReader = new BufferedReader(myFileReader);
//this if for converting the comma into a character this can understand
String comma = ",";
char fieldCharacter = comma.charAt(0);
//csvReader
CsvReader myReader;
myReader = new CsvReader(myBufferedReader, fieldCharacter);
//this if for converting the text into a character this can understand
String text = "\"";
char textCharacter = text.charAt(0);
myReader.setTextQualifier(textCharacter);
myReader.setUseTextQualifier(true);
FileWriter nodesWriter = new FileWriter("D:\\Learning\\EUR - Handling Digital Data\\Output\\Lecture4\\nodes.txt");
BufferedWriter nodesBWriter = new BufferedWriter(nodesWriter);
// FileWriter connWriter = new FileWriter("D:\\Learning\\EUR - Handling Digital Data\\Output\\Lecture4\\conns.txt");
// BufferedWriter connBWriter = new BufferedWriter(connWriter);
//Multiset Tags
HashMultiset<String> myTags = HashMultiset.create();
//Multiset Links
HashMultiset<String> myConnections = HashMultiset.create();
//start the loop
while (myReader.readRecord()) {
String[] values = myReader.getValues();
String tagsOfImage = values[2];
String[] myTagsArrayed;
myTagsArrayed = tagsOfImage.split(",");
myTags.addAll(Arrays.asList(myTagsArrayed));
nodesBWriter.write("Id,Label,Number");
nodesBWriter.newLine();
for (String tags: myTags.elementSet()){
nodesBWriter.write(tags);
nodesBWriter.write(",");
nodesBWriter.write(tags);
nodesBWriter.write(",");
nodesBWriter.write(myTags.count(tags));
nodesBWriter.newLine();
}
nodesBWriter.close();
Utils usefulTools = new Utils();
myConnections.addAll(usefulTools.getListOfLinks(myTagsArrayed));
}
myBufferedReader.close();
}
}
答案 0 :(得分:1)
错误是您在循环中关闭nodesBWriter
。因此,在循环的第二次迭代中,写入失败。只需在循环结束后移动nodesBWriter.close();
。