java按指定编码写入和读取文件内容的类

可以指定编码如：utf-8来写入和读取文件。如果文件编码未知，可以通过该方法先得到文件的编码后再指定正确的编码来读取，否则会出现文件乱码问题。

如何识别文件编码请参考：java自动根据文件内容的编码来读取避免乱码  通过cpdetector这个开源的jar包可以自动判断当前文件的内容编码

 package com.zuidaima.util;

 import java.io.BufferedReader;
 import java.io.BufferedWriter;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;

 public class ReadWriteFileWithEncode {

     public static void write(String path, String content, String encoding)
             throws IOException {
         File file = new File(path);
         file.delete();
         file.createNewFile();
         BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
                 new FileOutputStream(file), encoding));
         writer.write(content);
         writer.close();
     }

     public static String read(String path, String encoding) throws IOException {
         String content = "";
         File file = new File(path);
         BufferedReader reader = new BufferedReader(new InputStreamReader(
                 new FileInputStream(file), encoding));
         String line = null;
         while ((line = reader.readLine()) != null) {
             content += line + "\n";
         }
         reader.close();
         return content;
     }

     public static void main(String[] args) throws IOException {
         String content = "中文内容";
         String path = "c:/test.txt";
         String encoding = "utf-8";
         ReadWriteFileWithEncode.write(path, content, encoding);
         System.out.println(ReadWriteFileWithEncode.read(path, encoding));
     }
 }