java按指定编码写入和读取文件内容的类分享

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：

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));
 }
}