cn.miw.utils.BigTextFileProcess Maven / Gradle / Ivy
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大文本文件读取工具(线程+缓冲区读取+回调处理),支持同时读取多个文件,一行代码搞定.
多个文件同时读取：
new BigTextFileProcess().readBigFile((fileName,line) -> { System.out.println(fileName+":"+line); }, fileNames);
读取单个文件：
new BigTextFileProcess().readBigFile(fileName,(fileName,line)->{System.out.println(fileName+":"+line);});
package cn.miw.utils;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
/**
* 大文本文件读取工具(线程+缓冲区读取+回调处理)
*
* @author mrzhou
*
*/
public class BigTextFileProcess {
public static void main(String[] args) throws IOException {
if (args.length > 1 && args[1] != null)
new BigTextFileProcess().readBigFile(args[1], line -> { System.out.println(line); });
}
/**
* 读大文本文件
*
* @author [email protected]
* @param fileName 文件名
* @param lineHandler 行处理器
*/
public void readBigFile(String fileName, IProcessLineHandler lineHandler) {
new Thread(() -> {
try {
FileInputStream inputStream = new FileInputStream(fileName);
InputStreamReader streamReader = new InputStreamReader(inputStream);
BufferedReader reader = new BufferedReader(streamReader);
String line = reader.readLine();
while (line != null && lineHandler != null) {
lineHandler.process(line);
line = reader.readLine();
}
reader.close();
inputStream.close();
} catch (IOException e) {
System.err.println("文件操作错误:" + e.getMessage());
}
}).start();
}
/**
* 行处理器
*
* @author [email protected]
*
*/
public interface IProcessLineHandler {
void process(String line);
}
}