Java项目GBK编码转UTF-8

方法一：使用Apache的common-io

1.maven项目pom.xml
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.5</version>
    </dependency>

2.代码

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import org.apache.commons.io.FileUtils;

public class Main {
public static void main(String[] args) {
//GBK编码格式源码路径 
    String srcDirPath = "D:\\ENews\\src"; 
//转为UTF-8编码格式源码路径 
    String utf8DirPath = "D:\\ENews\\UTF8\\src"; 
//获取所有java文件 
    Collection<File> javaGbkFileCol =  FileUtils.listFiles(new File(srcDirPath), new String[]{"java"}, true); 
for (File javaGbkFile : javaGbkFileCol) { 
//UTF8格式文件路径 
              String utf8FilePath = utf8DirPath+javaGbkFile.getAbsolutePath().substring(srcDirPath.length()); 
//使用GBK读取数据，然后用UTF-8写入数据 
try {
                FileUtils.writeLines(new File(utf8FilePath), "UTF-8", FileUtils.readLines(javaGbkFile, "GBK"));
            } catch (IOException e) {
                e.printStackTrace();
            }        
        }
    }
}

方法二：

import java.io.BufferedReader;
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.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ConverEncoding {

public static void main(String[] args) throws Exception {
      String srcDir = "E:\\project\\ReadFile\\src";
      List<String> files = new ArrayList<String>();
      fetchFileList(srcDir, files, ".java");
for(String fileName : files){
         convert(fileName, "GBK", fileName, "UTF-8");
      }
   }
public static void convert(String oldFile, String oldCharset, String newFlie, String newCharset){
      BufferedReader bin;
      FileOutputStream fos;
      StringBuffer content = new StringBuffer();
try {
         System.out.println(oldFile);
         bin = new BufferedReader(new InputStreamReader(new FileInputStream(oldFile), "gbk"));
         String line = null;
while((line=bin.readLine())!=null){
            content.append(line);
            content.append(System.getProperty("line.separator"));
         }
         bin.close();
         File dir = new File(newFlie.substring(0, newFlie.lastIndexOf("\\")));
if(!dir.exists()){
            dir.mkdirs();
         }
         fos = new FileOutputStream(newFlie);
         Writer out = new OutputStreamWriter(fos, newCharset);
         out.write(content.toString());
         out.close();
         fos.close();
      } catch (UnsupportedEncodingException e) {
         e.printStackTrace();
      } catch (FileNotFoundException e) {
         e.printStackTrace();
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
public static void fetchFileList(String strPath, List<String> filelist, final String regex) {
      File dir = new File(strPath);
        File[] files = dir.listFiles();
        Pattern p = Pattern.compile(regex);
if (files == null)
return;
for (int i = 0; i < files.length; i++) {
if (files[i].isDirectory()) {
               fetchFileList(files[i].getAbsolutePath(), filelist, regex);
            } else {
                String strFileName = files[i].getAbsolutePath().toLowerCase();
                Matcher m = p.matcher(strFileName);
if(m.find()){
                  filelist.add(strFileName);
                }
            }
        }
    }
}