Java文件操作常用函数记录：

package com.springwoods.utills;

import java.io.BufferedOutputStream;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

public class FileUtils {

public FileUtils(){

System.out.println("----->");

}

public static boolean IsExist(String path){

boolean Is;

File file=new File(path);

Is = file.exists();

return Is;

}

/**

* @方法名称 :wrieteFile

* @功能描述 :写文件操作

* @返回值类型 :void

* @param path 文件路径 ，content 写的内容

*/

public static void wrieteFile(String path, String content){

if(IsExist(path)) {

OutputStream out;

try {

out = new BufferedOutputStream(new FileOutputStream(path));

byte[] time = content.getBytes();

out.write(time);

out.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

/**

* @方法名称 :readLineFile

* @功能描述 :一行一行读文件内容

* @返回值类型 :void

* @param filename 文件名

*/

public static void readLineFile(String filename){

try {

FileInputStream in = new FileInputStream(filename);

InputStreamReader inReader = new InputStreamReader(in, "UTF-8");

BufferedReader bufReader = new BufferedReader(inReader);

String line = null;

int i = 1;

while((line = bufReader.readLine()) != null){

System.out.println("第" + i + "行：" + line);

i++;

}

bufReader.close();

inReader.close();

in.close();

} catch (Exception e) {

e.printStackTrace();

System.out.println("读取" + filename + "出错！");

}

}

/**

* @方法名称 :writeLineFile

* @功能描述 :一行一行写文件

* @返回值类型 :void

* @param filename 文件名，content 写的内容

*/

public static void writeLineFile(String filename, String[] content){

if(IsExist(filename)) {

try {

FileOutputStream out = new FileOutputStream(filename);

OutputStreamWriter outWriter = new OutputStreamWriter(out, "UTF-8");

BufferedWriter bufWrite = new BufferedWriter(outWriter);

for (int i = 0; i < content.length; i++) {

bufWrite.write(content[i] + "\r\n");

}

bufWrite.close();

outWriter.close();

out.close();

} catch (Exception e) {

e.printStackTrace();

System.out.println("读取" + filename + "出错！");

}

}

}

/**

* @方法名称 :writeLineFile

* @功能描述 :一行一行写文件

* @返回值类型 :void

* @param filename 文件名，content 写的内容

*/

public static void writeLineFile(String filename, String content){

try {

FileOutputStream out = new FileOutputStream(filename, true);

OutputStreamWriter outWriter = new OutputStreamWriter(out, "UTF-8");

BufferedWriter bufWrite = new BufferedWriter(outWriter);

bufWrite.write(content + "\r\n");

bufWrite.close();

outWriter.close();

out.close();

} catch (Exception e) {

e.printStackTrace();

System.out.println("读取" + filename + "出错！");

}

}

}