Question

我想比较两个或更多文本文件以查找重复条目。 O / P应该说文件中的那些行是否匹配。

我想将每个文件1 行与文件2 的所有行进行比较（即，比较文件1＆＃39;第1行文件的所有行2）。当我运行下面的代码时，它将文件1的第1行与文件2的所有行进行比较，然后程序被终止。

注意：我尝试了 Danail Alexiev 的想法（查看答案），但循环无限运行，（也没有跳到2行文件1，文件1＆＃39;第1行的无限循环，文件2的所有行

以下文件

文件1：内容

21321sc231231a23d1a32df1adfsdfsdfsd
fsdfs4dfs
dfsdf
3sd1f
sdfs4df3s 
df0 
sd4f 
sdf 
sdf1 
3sdf 
sdfs4df6s 
fs1df 
3sdfsd 
fs.d1f 
s3d1
sdf1s 
df1 
sdf1sdf

文件2：内容

21321sc231231a23d1a32df1adfsdfsdfsd
fsdfs4dfs
dfsdf
3sd1f
sdfs4df3s 
df0 
sd4f 
sdf 
sdf1 
3sdf 
sdfs4df6s 
fs1df 
3sdfsd 
fs.d1f 
s3d1
sdf1s 
df1 
sdf1sdf

代码：

while ((sCurrentLine1 =file1.readLine()) != null )
 {
  while ((sCurrentLine2 =file2.readLine()) != null )
   {
    if(sCurrentLine1.equalsIgnoreCase(sCurrentLine2))
     {
      System.out.println("=---Matched----=" + sCurrentLine1 + " -->" + sCurrentLine2);
     }
     else
     {
      System.out.println("=---Not Matched----=" + sCurrentLine1 + " -->" + sCurrentLine2);
     }
    }
  }

O / P ：

= --- Matched ---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; 1321sc231231a23d1a32df1adfsdfsdfsd = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; fsdfs4dfs = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; dfsdf = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; 3sd1f = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; sdfs4df3s = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; df0 = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; sd4f = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; sdf = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; sdf1 = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; 3sdf = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; sdfs4df6s = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; fs1df = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; 3sdfsd = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; fs.d1f = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; s3d1 = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; sdf1s = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; df1 = ---未匹配---- = 1321sc231231a23d1a32df1adfsdfsdfsd - ＆gt; sdf1sdf

Answer 1

您正在将第二个文件的每一行与第一个文件的每一行进行比较。

为了进行正确的比较，您必须检查匹配的行号。

将循环更改为：

while (((sCurrentLine1 = file1.readLine()) != null) && ((sCurrentLine2 = file2.readLine()) != null) {
    // your comparison
}

请务必检查以检测文件行数不同的情况。

修改

在OP澄清之后，我想我知道这个问题。

您正在尝试阅读文件。当您将File1的第一行与File2中的所有行进行比较时，嵌套while循环将停止，因为您已经读取了文件中的所有行，readLine()每次都会返回null。

要解决此问题，您需要提前读取File2中的所有行，并使用它们与File1的行进行比较。

Answer 2

public void CompareFileMain()
{
   /*int tempvar = 0;
   int tempvar1 =0 ;*/
   String Tlines1[] = new String [100];
   String Tlines2[] = new String [100];
   String tempstring1 = null;
   String tempstring2 = null;
   int file1lines;
   int file2lines ;
   System.out.println(file1lines = linesOffile1());
   System.out.println(file2lines = linesOffile2());
   try {
    file1 = new BufferedReader(new FileReader(SOAPFile));
    file2 = new BufferedReader(new FileReader(RestFile));
    int oplines = 1;
    while ((sCurrentLine1 =file1.readLine()) != null ) 
    {
        tempstring1 = sCurrentLine1;
        while ((sCurrentLine2 =file2.readLine()) != null )
        {
               tempstring2 = sCurrentLine2;
                }
        if ((sCurrentLine2 =file2.readLine()) == null)
        {
           System.out.println("File 1 --> line# "+oplines +"\t");
           CompareFileSub(tempstring1, tempstring2);
        }
        oplines = oplines+1;
    }
        } catch (IOException e) {
        e.printStackTrace();
        }
}
public void CompareFileSub(String t1, String t2) throws IOException  // reading file 2 
{
  file2 = new BufferedReader(new FileReader(RestFile));
  int oplines = 1;
  while ((sCurrentLine2 =file2.readLine()) != null )
  {
    t2 = sCurrentLine2;
    if((t1.contains(t2) && (t2.contains(t1))))
    {
          System.out.print(t1+"-->"+t2+"---->matched \t");
          System.out.println("File 2 --> line# "+oplines +"\n");
    }
    else
    {
          System.out.print(t1+"-->"+t2+"---->not matched \t");
          System.out.println("File 2 --> line# "+oplines +"\n");
    }
              oplines = oplines+1;
 }
}

public int linesOffile1() //Count file 1 lines
{
  try {
    while ((sCurrentLine1 =file1.readLine()) != null )
    {
        //System.out.println("Taken line sCurrentLine1 "+sCurrentLine1);
        //System.out.println("Taken line sCurrentLine1 "+i);
        i=i+1;
    }                                   
        } catch (IOException e) {
            e.printStackTrace();
            }
   finally {
    try {
           if (file1 == null)file1.close();
         } catch (IOException ex) {
                ex.printStackTrace();
                }
    }
   return i;

}      
public int linesOffile2() //Count file 2 lines
{
  try {
    while ((sCurrentLine2 =file2.readLine()) != null )
    {   
    //System.out.println("Taken line sCurrentLine2 "+sCurrentLine2);
    //System.out.println("Taken line sCurrentLine2 "+j);
    j=j+1;
    }
        } catch (IOException e) {
            e.printStackTrace();
            }   
  finally {
    try {
        if (file2 == null)file1.close();
    } catch (IOException ex) {
            ex.printStackTrace();
            }
    }
 return j;
}

输入：

File1中：

java
c++

test
stack
test
overflow
extraLine

文件2：

stack
overflow
test
java
c++

test

输出继电器

8
7
File 1 --> line# 1  
java-->stack---->not matched    File 2 --> line# 1

java-->overflow---->not matched     File 2 --> line# 2

java-->test---->not matched     File 2 --> line# 3

java-->java---->matched     File 2 --> line# 4

java-->c++---->not matched  File 2 --> line# 5

java-->---->not matched     File 2 --> line# 6

java-->test---->not matched     File 2 --> line# 7

File 1 --> line# 2  
c++-->stack---->not matched     File 2 --> line# 1

c++-->overflow---->not matched  File 2 --> line# 2

c++-->test---->not matched  File 2 --> line# 3

c++-->java---->not matched  File 2 --> line# 4

c++-->c++---->matched   File 2 --> line# 5

c++-->---->not matched  File 2 --> line# 6

c++-->test---->not matched  File 2 --> line# 7

File 1 --> line# 3  
-->stack---->not matched    File 2 --> line# 1

-->overflow---->not matched     File 2 --> line# 2

-->test---->not matched     File 2 --> line# 3

-->java---->not matched     File 2 --> line# 4

-->c++---->not matched  File 2 --> line# 5

-->---->matched     File 2 --> line# 6

-->test---->not matched     File 2 --> line# 7

File 1 --> line# 4  
test-->stack---->not matched    File 2 --> line# 1

test-->overflow---->not matched     File 2 --> line# 2

test-->test---->matched     File 2 --> line# 3

test-->java---->not matched     File 2 --> line# 4

test-->c++---->not matched  File 2 --> line# 5

test-->---->not matched     File 2 --> line# 6

test-->test---->matched     File 2 --> line# 7

File 1 --> line# 5  
stack-->stack---->matched   File 2 --> line# 1

stack-->overflow---->not matched    File 2 --> line# 2

stack-->test---->not matched    File 2 --> line# 3

stack-->java---->not matched    File 2 --> line# 4

stack-->c++---->not matched     File 2 --> line# 5

stack-->---->not matched    File 2 --> line# 6

stack-->test---->not matched    File 2 --> line# 7

File 1 --> line# 6  
test-->stack---->not matched    File 2 --> line# 1

test-->overflow---->not matched     File 2 --> line# 2

test-->test---->matched     File 2 --> line# 3

test-->java---->not matched     File 2 --> line# 4

test-->c++---->not matched  File 2 --> line# 5

test-->---->not matched     File 2 --> line# 6

test-->test---->matched     File 2 --> line# 7

File 1 --> line# 7  
overflow-->stack---->not matched    File 2 --> line# 1

overflow-->overflow---->matched     File 2 --> line# 2

overflow-->test---->not matched     File 2 --> line# 3

overflow-->java---->not matched     File 2 --> line# 4

overflow-->c++---->not matched  File 2 --> line# 5

overflow-->---->not matched     File 2 --> line# 6

overflow-->test---->not matched     File 2 --> line# 7

File 1 --> line# 8  
extraLine-->stack---->not matched   File 2 --> line# 1

extraLine-->overflow---->not matched    File 2 --> line# 2

extraLine-->test---->not matched    File 2 --> line# 3

extraLine-->java---->not matched    File 2 --> line# 4

extraLine-->c++---->not matched     File 2 --> line# 5

extraLine-->---->not matched    File 2 --> line# 6

extraLine-->test---->not matched    File 2 --> line# 7

得到解决方案，谢谢大家

JAVA程序用于2个或更多文本文件的比较

2 个答案: