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package com.mesasoft.cn.util;
import org.apache.log4j.Logger;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
/**
* @author yjy
* @version 1.0
* @date 2021/2/25 6:11 下午
*/
public class FileUtils {
private static final Logger LOG = Logger.getLogger(FileUtils.class);
public static List<String> readTxtFileIntoStringArrList(String filePath)
{
List<String> list = new ArrayList<>();
try
{
String encoding = "GBK";
File file = new File(filePath);
if (file.isFile() && file.exists())
{ // 判断文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file), encoding);
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while ((lineTxt = bufferedReader.readLine()) != null)
{
if (!lineTxt.equals("")) {
list.add(lineTxt.trim());
}
}
bufferedReader.close();
read.close();
}
else
{
System.out.println("Can not find file: " + filePath);
}
}
catch (Exception e)
{
System.out.println("Error occurred in Function 'readTxtFileIntoStringArrList'");
e.printStackTrace();
}
return list;
}
public static List<String> getBatchLineReadIn(BufferedReader bufferedReader, int batchSize){
List<String> list = new ArrayList<>();
String lineTxt;
try{
while ((lineTxt = bufferedReader.readLine()) != null && list.size()<batchSize)
{
if (!lineTxt.equals("")) {
list.add(lineTxt.trim());
}
}
} catch (IOException e){
e.printStackTrace();
}
return list;
}
public static void createFile(File filePath, String fileName){
try {
File file = new File(filePath.toString() + "/" + fileName);
if (!filePath.exists()){
filePath.mkdirs();
}
boolean isCreate = file.createNewFile();
if (isCreate){
LOG.info("File " + fileName + " is created.");
}
} catch (IOException e) {
e.printStackTrace();
}
}
public static void createFile(File file){
try {
boolean isCreate = file.createNewFile();
if (isCreate){
LOG.info("File " + file + " is created.");
}
} catch (IOException e) {
e.printStackTrace();
}
}
public static String readJsonFile(String fileName) {
String jsonStr = "";
try {
File jsonFile = new File(fileName);
FileReader fileReader = new FileReader(jsonFile);
Reader reader = new InputStreamReader(new FileInputStream(jsonFile), "utf-8");
int ch = 0;
StringBuffer sb = new StringBuffer();
while ((ch = reader.read()) != -1) {
sb.append((char) ch);
}
fileReader.close();
reader.close();
jsonStr = sb.toString();
return jsonStr;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
public static String getFileName(File file){
String[] tmp = file.toString().split("/");
String fileName = tmp[tmp.length-1];
return fileName;
}
public static void writerClose(OutputStreamWriter outWriter, OutputStream outStream) throws IOException {
assert outWriter != null;
outWriter.close();
outStream.close();
}
public static void readerClose(BufferedReader bufferedReader, InputStreamReader inputStreamReader) throws IOException {
assert inputStreamReader != null;
bufferedReader.close();
inputStreamReader.close();
}
//执行cmd命令，获取返回结果
public static String execCMD(String command) {
StringBuilder sb =new StringBuilder();
try {
Process process=Runtime.getRuntime().exec(command);
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(process.getInputStream()));
String line;
while((line=bufferedReader.readLine())!=null)
{
sb.append(line+"\n");
}
} catch (Exception e) {
return e.toString();
}
return sb.toString();
}
public static Long getFileLineNum(File file){
Long num = 0L;
if (!file.exists()){
LOG.error("File not exist: " + file.toString());
} else {
String res = FileUtils.execCMD("wc -l " + file.toString());
num = Long.parseLong(res.trim().split(" ")[0]);
}
return num;
}
public static int getMaxLength(String filePath) {
int lengthDomain = 0;
try {
String encoding = "UTF-8";
File file = new File(filePath);
if (file.isFile() && file.exists()) {
InputStreamReader read = new InputStreamReader(
new FileInputStream(file), encoding);
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null;
while ((lineTxt = bufferedReader.readLine()) != null) {
String[] split = lineTxt.split("\\.");
if (split.length > lengthDomain) {
lengthDomain = split.length;
}
}
read.close();
} else {
LOG.error("FilePath is wrong--->{" + filePath + "}<---");
}
} catch (Exception e) {
LOG.error("Get filePathData error--->{" + e + "}<---");
e.printStackTrace();
}
return lengthDomain;
}
}
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