package com.test; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.net.URLDecoder; import java.net.URLEncoder; public class Transcoding {  private BytesEncodingDetect encode = new BytesEncodingDetect();  public Transcoding() {  }  /**   * 编码转换   * @param toCharset 要转换的编码   * @param path 要转换的文件路径   * @return   * @throws Exception   */  public String encoding(String toCharset, String path) throws Exception{   File srcFile = new File(path);   int index = encode.detectEncoding(srcFile);   String charset = BytesEncodingDetect.javaname[index];   // 编码相同，无需转码   if (charset.equalsIgnoreCase(toCharset)) {    return "编码一样，无需转换";   }   InputStream in = new FileInputStream(path);   BufferedReader br = new BufferedReader(     new InputStreamReader(in, charset));   StringBuffer sb = new StringBuffer();   String s1;   while ((s1=br.readLine())!=null) {    String s = URLEncoder.encode(s1, toCharset);    sb.append(s+"\r\n");//一行+回车   }   br.close();   srcFile.delete();//删除原来文件   //重新以新编码写入文件并返回值   File newfile = new File(path);//重新建原来的文件   newfile.createNewFile();   OutputStream out = new FileOutputStream(newfile);   OutputStreamWriter  writer = new OutputStreamWriter(out, toCharset);   BufferedWriter bw = new BufferedWriter(writer);   bw.write(URLDecoder.decode(sb.toString(), toCharset));   String result = URLDecoder.decode(sb.toString(), toCharset);   bw.flush();//刷到文件中   bw.close();   return result;  } }