制表符分隔的字符串到数组答案

【问题标题】：Tab delimited String to arrays制表符分隔的字符串到数组
【发布时间】：2012-08-10 15:22:16
【问题描述】：

我想要实现的是逐行读取 Excel 工作表中的数据（保存在 Txt 中，以制表符分隔），每一列都是我想要存储在数组中的不同数据。

我尝试了不同的方法。我什至从互联网上下载了 CSVReader 类，但它没有用。至少这一次它阅读真实的字符而不是胡言乱语。

我现在的版本是使用 bufferedReader 和 String Tokenizer。但它没有正确阅读。

代码如下：

     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.StringTokenizer;

     import com.csvreader.CsvReader;

     import au.com.bytecode.opencsv.CSVReader;


     public class excelToText{
     public static void main(String[] args) throws IOException {

    try
    {

        //csv file containing data
          BufferedReader CSVFile = new BufferedReader(new          FileReader("C:/Users/nhajjar/workspace/MB/src/yoyo.txt"));


          // Read first line.
          String dataRow; 
          int lineNumber = 0; 


          while ((dataRow = CSVFile.readLine() )!= null)
          {
                String [] dataArray;
                lineNumber++; 



                String delimiter = "\t";
                /* given string will be split by the argument delimiter provided. */
                dataArray = dataRow.split(delimiter);
                /* print substrings */

// for(int i =0; i

                String PrinterName = dataArray[0];
                String Model = dataArray[1];
                String IP = dataArray[2];
                String Location = dataArray[3];
                String Department = dataArray[4];
                String PrimServer = dataArray[5];
                String SecServer = dataArray[6];
                String ShareName = dataArray[7];
                String GroupNamePrefix = dataArray[8];
                String GroupNameSuffix = dataArray[9];
                String GroupNameFinal = dataArray[10];
                String WSPPrefix = dataArray[11];
                String WSPFull = dataArray[12];
                String PrimWSP = dataArray[13];
                String SecWSP = dataArray[14];

              System.out.println("PrinterName is : " + PrinterName);
                System.out.println("Model is : " + Model);
                System.out.println("IP is : " + IP);
                System.out.println("Location is : " + Location);
                System.out.println("Department is : " + Department);
                System.out.println("PrimServer is : " + PrimServer);
                System.out.println("SecServer is : " + SecServer);
                System.out.println("ShareName is : " + ShareName);
                System.out.println("GroupNamePrefix is : " + GroupNamePrefix);
                System.out.println("GroupNameSuffix is : " + GroupNameSuffix);
                System.out.println("GroupNameFinal is : " + GroupNameFinal);
                System.out.println("WSPPrefix is : " + WSPPrefix);
                System.out.println("WSPFull is : " + WSPFull);
                System.out.println("PrimWSP is : " + PrimWSP);
                System.out.println("PrimWSP is : " + PrimWSP);
                System.out.println("SecWSP is : " + SecWSP);



                /*//writing file for ones that were not sent out. 
                  File file = new File("write.txt");
                  BufferedWriter output = new BufferedWriter(new FileWriter(file));
                  */

            }




            CSVFile.close();

        }   catch (FileNotFoundException e) {
            e.printStackTrace();
        }   catch (IOException e) {
            e.printStackTrace();
        }   catch(Exception e)          {
          System.out.println("Exception while reading/writing csv file: " + e);                   
        }// end Exceptions 

  }// end try block 
     }

输入是：

    Printer name    Model   IP  Location    Department  Primary Server  Secondary Server    Share Name
    Boundary Sprinter Techs Lexmark E360dn      Boundary    Sprinter    s173m928site    s173mho1site    928-Sprinter-techs-L-E360dn
    Boundary Sprinter Xerox 7232    Xerox WorkCentre 7232       Boundary    Sprinter    s173m928site    s173mho1site    928-Sprinter-WC7232
    Boundry Parts   HP LaserJet P2055dn     Boundary    Parts   s173m928site    s173mho1site    928-Parts-LJ-P2055dn
    Boundry Sales   HP Color LaserJet CP4005        Boundary    Sales   s173m928site    s173mho1site    928-Sales-Main-CP4005
    Boundry Techs East  HP LaserJet P3015       Boundary    Techs East  s173m928site    s173mho1site    928-Techs-east-LJ-P3015
    Boundry Techs West  Lexmark E352dn      Boundary    Techs West  s173m928site    s173mho1site    928-Techs-west-L-E352dn
    Concord     Lexmark E360dn      Concord         s173mho1site    
    Dundas Parts    Xerox WorkCentre 7232       Dundas  Parts   s173m910site    s173mho1site    910-Parts-WC-7232
    Dundas Preowned Xerox WorkCentre 7425       Dundas  Preowned    s173m910site    s173mho1site    910-PreOwned-WC-7425
    Dundas Sales 2nd Floor  HP Color LaserJet CP4025        Dundas  Sales   s173m910site    s173mho1site    910-Sales-2nd-CP4025
    Dundas Sales Main Floor HP Color LaserJet CP4025        Dundas  Sales   s173m910site    s173mho1site    910-Sales-Main-CP4025


output im getting is : 


PrinterName is : Printer name 
Model is : Model
IP is : IP
Location is : Location
Department is : Department
PrimServer is : Primary Server 
SecServer is : Secondary Server
ShareName is : Share Name
GroupNamePrefix is : Group Name Prefix
GroupNameSuffix is : Group Name Suffix
GroupNameFinal is : Group Name Final
WSPPrefix is : WSP Prefix
WSPFull is : WSP Full
PrimWSP is : Primary WSP
PrimWSP is : Primary WSP
SecWSP is : Secondary WSP


PrinterName is : Boundary Sprinter Techs
Model is : Lexmark E360dn
IP is : 53.254.177.138
Location is : Boundary
Department is : Sprinter
PrimServer is : s173m928site
SecServer is : s173mho1site
ShareName is : 928-Sprinter-techs-L-E360dn
GroupNamePrefix is : D173_PRINTER-
GroupNameSuffix is : 928-Sprinter-techs-L-E360dn
GroupNameFinal is : D173_PRINTER-928-Sprinter-techs-L-E360dn
WSPPrefix is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\
WSPFull is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\D173_PRINTER-928-Sprinter-techs-L-E360dn.wsp;D173_PRINTER-928-Sprinter-techs-L-E360dn
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Sprinter-techs-L-E360dn
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Sprinter-techs-L-E360dn
SecWSP is : ;>;%;\\s173mho1site.cambc.corpintra.net\928-Sprinter-techs-L-E360dn


PrinterName is : Boundary Sprinter Xerox 7232
Model is : Xerox WorkCentre 7232
IP is : 53.254.177.136
Location is : Boundary
Department is : Sprinter
PrimServer is : s173m928site
SecServer is : s173mho1site
ShareName is : 928-Sprinter-WC7232
GroupNamePrefix is : D173_PRINTER-
GroupNameSuffix is : 928-Sprinter-WC7232
GroupNameFinal is : D173_PRINTER-928-Sprinter-WC7232
WSPPrefix is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\
WSPFull is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\D173_PRINTER-928-Sprinter-WC7232.wsp;D173_PRINTER-928-Sprinter-WC7232
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Sprinter-WC7232
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Sprinter-WC7232
SecWSP is : ;>;%;\\s173mho1site.cambc.corpintra.net\928-Sprinter-WC7232


PrinterName is : Boundry Parts
Model is : HP LaserJet P2055dn
IP is : 53.254.193.222
Location is : Boundary
Department is : Parts
PrimServer is : s173m928site
SecServer is : s173mho1site
ShareName is : 928-Parts-LJ-P2055dn
GroupNamePrefix is : D173_PRINTER-
GroupNameSuffix is : 928-Parts-LJ-P2055dn
GroupNameFinal is : D173_PRINTER-928-Parts-LJ-P2055dn
WSPPrefix is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\
WSPFull is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\D173_PRINTER-928-Parts-LJ-P2055dn.wsp;D173_PRINTER-928-Parts-LJ-P2055dn
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Parts-LJ-P2055dn
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Parts-LJ-P2055dn
SecWSP is : ;>;%;\\s173mho1site.cambc.corpintra.net\928-Parts-LJ-P2055dn


PrinterName is : Boundry Sales
Model is : HP Color LaserJet CP4005
IP is : 53.254.193.117
Location is : Boundary
Department is : Sales
PrimServer is : s173m928site
SecServer is : s173mho1site
ShareName is : 928-Sales-Main-CP4005
GroupNamePrefix is : D173_PRINTER-
GroupNameSuffix is : 928-Sales-Main-CP4005
GroupNameFinal is : D173_PRINTER-928-Sales-Main-CP4005
WSPPrefix is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\
WSPFull is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\D173_PRINTER-928-Sales-Main-CP4005.wsp;D173_PRINTER-928-Sales-Main-CP4005
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Sales-Main-CP4005
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Sales-Main-CP4005
SecWSP is : ;>;%;\\s173mho1site.cambc.corpintra.net\928-Sales-Main-CP4005


PrinterName is : Boundry Techs East
Model is : HP LaserJet P3015
IP is : 53.254.193.220
Location is : Boundary
Department is : Techs East
PrimServer is : s173m928site
SecServer is : s173mho1site
ShareName is : 928-Techs-east-LJ-P3015
GroupNamePrefix is : D173_PRINTER-
GroupNameSuffix is : 928-Techs-east-LJ-P3015
GroupNameFinal is : D173_PRINTER-928-Techs-east-LJ-P3015
WSPPrefix is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\
WSPFull is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\D173_PRINTER-928-Techs-east-LJ-P3015.wsp;D173_PRINTER-928-Techs-east-LJ-P3015
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Techs-east-LJ-P3015
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Techs-east-LJ-P3015
SecWSP is : ;>;%;\\s173mho1site.cambc.corpintra.net\928-Techs-east-LJ-P3015


PrinterName is : Boundry Techs West
Model is : Lexmark E352dn
IP is : 53.254.193.221
Location is : Boundary
Department is : Techs West
PrimServer is : s173m928site
SecServer is : s173mho1site
ShareName is : 928-Techs-west-L-E352dn
GroupNamePrefix is : D173_PRINTER-
GroupNameSuffix is : 928-Techs-west-L-E352dn
GroupNameFinal is : D173_PRINTER-928-Techs-west-L-E352dn
WSPPrefix is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\
WSPFull is : #;\D173\_GLOBALRESOURCES\GROUPS\Printers\D173_PRINTER-928-Techs-west-L-E352dn.wsp;D173_PRINTER-928-Techs-west-L-E352dn
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Techs-west-L-E352dn
PrimWSP is : >;%;\\s173m928site.cambc.corpintra.net\928-Techs-west-L-E352dn
SecWSP is : ;>;%;\\s173mho1site.cambc.corpintra.net\928-Techs-west-L-E352dn
Exception while reading/writing csv file: java.lang.ArrayIndexOutOfBoundsException: 7

注意：我截断了输出。还有更多这样的“空块”

【问题讨论】：

“但读取不正确。” 你能说得更具体点吗？你有问题吗？什么是预期的输出？当文件是制表符分隔时，为什么使用“+”作为分隔符？您是否尝试过 "\t" 或使用 split("\t")？
obv 读取不正确，这是我的问题。我不知道为什么。预期的输出是打印机名称、型号、ip、位置...从文件中获取正确的值。
您指定的输入似乎不是 csv 值列表，而是空格/制表符分隔的值。你的问题是什么？你想达到什么目的？
您的标题显示为 CSV，但您的输入中没有逗号。文件真的是制表符吗？
我要修复的第一件事是您的分隔符，因为它们对我没有任何意义。

标签： java arrays string csv

【解决方案1】：

看起来你把事情复杂化了。 CSV 文件具有逗号分隔值。所以你的文件数据应该是这样的：

第 1 行：单元格 1、单元格 2、单元格 3、单元格 4 等...

第 2 行：第 2 行的单元格 1、第 2 行的单元格 2 等...

您使用的是制表符分隔文件，因此您需要在制表符上拆分

//Read first line 
String dataRow;
int lineNumber = 0;
while((dataRow = CSVFile.readline()) != null)
{
    String [] dataArray;
    lineNumber++;
    String delimiter = "\t";
    dataArray = dataRow.split(delimiter); //Now dataArray contains all the tab delimited cells that were on line one of the .txt file
    //Start assigning the information to your variables since it is stored in dataArray
    String PrinterName = dataArray[0];//This would assign the first cell (row 1, column 1 in excel) that was read from the text file. From looking at your input this should be "Printer name"
    String Model = dataArray[1];
    String IP = dataArray[2];
    //etc...Assign the rest
    //Print your output
    //Do anything else you need to do
 }//end the while loop

这里有一些来源：

http://www.java-examples.com/java-string-split-example

注意：这个例子更接近你正在做的只是使用“\t”而不是“，”： http://www.daniweb.com/software-development/java/threads/17262/reading-in-a-.csv-file-and-loading-the-data-into-an-array

希望对你有帮助

【讨论】：

读取/写入 csv 文件时出现异常崩溃：java.lang.ArrayIndexOutOfBoundsException: 7
我会查看将数据插入数组的代码部分。该错误只是指您尝试访问尚不存在的插槽。您是否超出了数组的大小？
我的第一个猜测是这行代码：dataArray[i++] = tokens.nextToken(); //如果 i 为 100 或更大，您将超出数组的范围，因为您声明的大小为 100（数组的索引为 0-99）
好吧，通常每个单元格包含不超过 50 个字符。我把它设为 100 是因为当我没有声明数组的大小时它崩溃了。也许更大的数组？
我指的不是单元格中的字符数，而是指您拥有的单元格数。如果您正在使用 "\t" 创建令牌并且如果您调用 tokens.countTokens() 并且它返回超过 100（意味着您有超过 100 个单元格），这也意味着我将超过您的字符串数组的边界宣布。 Declaring string[] dataArray = new String[100];//这会为您分配内存以存储最多 100 个字符串（例如 100 个单元格的内容），而不是 100 个字符。如果不清楚，我可以进一步解释。

【解决方案2】：

标记仅由空格和加号分隔。那是因为StringTokenizer 的第二个参数不允许正则表达式。尝试使用 "\t" 字段似乎真正分开。

顺便说一下，你并不需要每行有 100 个字符串数组。

【讨论】：

【解决方案3】：

我建议使用String.split() 函数，因为这将大大简化您的代码。

【讨论】：

【解决方案4】：

我不建议您自己使用 .split 或 StringTokenizer 类来拆分数据。他们不考虑字段引用等...

使用类似（如前所述）OpenCSV 或 StrTokenizer（commons-lang 的一部分）之类的库为您进行解析。

使用制表符分隔解析器的 StrTokenizer 示例：

StrTokenizer tokenizer = StrTokenizer.getTSVInstance();    
while ( (line = ...) != null) {
    tokenizer.reset(line);
    String tokArray[] = tokenizer.getTokenArray();
}

【讨论】：