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1. Split into multiple files first

2. Multiple threads operate multiple files to avoid two threads operating the same file

3. Read files line by line and write new files line by line

4. Merge all files

1,4 Just use linux commands~

File file = new File(filepath);
BufferedInputStream fis = new BufferedInputStream(new FileInputStream(file));
BufferedReader reader = new BufferedReader(new InputStreamReader(fis,"utf-8"),510241024);
String line = "";
while((line = reader.readLine()) != null){

//進(jìn)行替換操作和其他業(yè)務(wù)    

}

In order to improve performance, you may need mapped IO. For details, please refer to:

1. Why use Memory Mapped File or MappedByteBuffer in Java

2. java large file read and write operations, java nio's MappedByteBuffer, efficient file/memory mapping

3. A simple comparison of the performance of java.io and java.nio

If it is a simple text replacement, just use the sed command of Linux.

If it is a more complex text replacement, see below:

1. http://stackoverflow.com/ques...

2. http://www.baeldung.com/java-...

用spark分析、
lines=sc.textFile("your_file");
filterlines=lines.filter(your_filter_function)
filterlines.xxx()