我想比较两个或多个文本文件以查找重复条目。O/P应该说明文件中的这些行是否匹配。
我想将文件1的每一行与文件夹2中的所有行进行比较(即，将文件1的第1行与文件2的所有行相比较(。当我运行下面的代码，将文件1的第1行与文件2的所有行进行比较时，程序终止。
注意：我尝试了Danail Alexiev的想法(见答案(，但循环正在无限运行，(也没有跳到文件1的2行，文件1的1行上的无限循环与文件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：
=---匹配----=1321SC231231a23d1a32df1adfsdfsd-->1321sc231231a23D1a32df1=---不匹配----=1321sc231231a23d1a32df1dfsdfsdfsd-->fsdfs4dfs=---不匹配----=1321SC231231a23d1a32df1adfsdfsd-->dfsdf=---不匹配----=1321SC231231a23d1a32df1dfsdfsd-->3sd1f=---不匹配----=1321SC231231a23d1a32df1dfsdfsdfsd-->sdfs4df3s=---不匹配----=1321SC231231a23d1a32df1adfsdfsd-->df0=---不匹配----=1321SC231231a23d1a32df1dfsdfsd-->sd4f=---不匹配----=1321SC231231a23d1a32df1dfsdfsd-->sdf=---不匹配----=1321SC231231a23d1a32df1adsfsdfsd-->sdf1=---不匹配----=1321SC231231a23d1a32df1adfsdfsd-->3sdf=---不匹配----=1321SC231231a23d1a32df1dfsdfsdfsd-->sdfs4df6s=---不匹配----=1321SC231231a23d1a32df1dfsdfsdfsd-->fs1df=---不匹配----=1321SC231231a23d1a32df1adfsdfsd-->3sdfsd=---不匹配----=1321SC231231a23d1a32df1dfsdfsdfsd-->fs.d1f=---不匹配----=1321SC231231a23d1a32df1adfsdfsd-->s3d1=---不匹配----=1321SC231231a23d1a32df1adfsdfsd-->sdf1s=---不匹配----=1321SC231231a23d1a32df1adfsdfsd-->df1=---不匹配----=1321SC231231a23d1a32df1adfsdfsd-->sdf1sdf
将第二个文件的每一行与第一个文件的各行进行比较。
为了进行正确的比较，您必须检查匹配的行号。
循环时将您更改为：
while (((sCurrentLine1 = file1.readLine()) != null) && ((sCurrentLine2 = file2.readLine()) != null) {
// your comparison
}
请确保包含一个检查，以检测文件具有不同行数的情况。
编辑：
经过OP的澄清，我想我知道这个问题了。
你正在努力边读边读文件。当比较File1中的第一行和File2中的所有行时，嵌套while循环将停止，因为您已经读取了文件中的所有行都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中的行进行比较。
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：
文件1:
java
c++
test
stack
test
overflow
extraLine
文件2:
stack
overflow
test
java
c++
test
Ouput
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
找到了解决方案，谢谢大家