从网上下载的项目，有时候.java文件的编码是ANSI。导入到自己的MyEclipse后，查看项目源码的时候，总是乱码。

一个个.java去修改的话， 既麻烦又不现实。所以写了下面这个工具类，进行批量转编码。

代码的原理仅仅就是遍历文件，然后使用流，对按照文件的原编码进行读取，用目的编码进行写操作。

直接上源码：

package test;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 Main {	// private String sDirectory = "D:/Workspaces/BeyondDiscuz/src/com";	private String sDirectory = "D:\\Workspaces\\BeyondDiscuz\\src\\com";	private String dDirectory = "D:\\Workspaces\\BeyondDiscuz\\src\\cn";	public static void main(String[] args) {		Main 吗 = new Main();		try {			吗.readerFile(吗.sDirectory);		} catch (IOException e) {			e.printStackTrace();		}	}	public void readerFile(String filePath) throws IOException {		if ("".equals(filePath) || null == filePath) {			return;		}		File f = new File(filePath);		if (f.isDirectory()) {			String[] child = f.list();			for (int i = 0; i < child.length; i++) {				String path = f.getAbsolutePath() + File.separator;				String newPath = path.replace(this.sDirectory, this.dDirectory);				child[i] = path + child[i];				File c = new File(child[i]);				String newFile = child[i].replace(this.sDirectory, this.dDirectory);				System.out.println("旧路径：" + path);				System.out.println("新路径：" + newPath);				File newP = new File(newPath);				if (!newP.exists())					newP.mkdir();				if (c.isFile()) {					System.out.println("旧文件：" + child[i]);					System.out.println("新文件：" + newFile);					// Charset US-ASCII ISO-8859-1 UTF-8 UTF-16BE UTF-16LE UTF-16  					BufferedReader r = new BufferedReader(new InputStreamReader(new FileInputStream(c), "GBK"));					// BufferedReader r = new BufferedReader(new InputStreamReader(new FileInputStream(c)));					File newF = new File(newFile);					newF.createNewFile();					// BufferedWriter w = new BufferedWriter(new					// OutputStreamWriter(new FileOutputStream(newF), "UTF-8"));					BufferedWriter w = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newF)));					// BufferedWriter w = new BufferedWriter(new FileWriter(newFile));					String lineText = null;					while ((lineText = r.readLine()) != null) {						// String temp = new String(lineText.getBytes("ISO-8859-1"), "UTF-8");						w.write(lineText);						w.newLine();					}					w.close();					r.close();				} else {					readerFile(child[i]);				}			}		}	}}

 上面自己的写代码只是基本思路，下面是更简洁的代码：

public static void main(String[] args) {        try {            String srcDirPath = "E:\\eclipseWorkspaceSandbase\\test";            // 转为UTF-8编码格式源码路径            String utf8DirPath = "E:\\eclipseWorkspaceSandbase\\test-8";                // 获取所有java文件            Collection
     
       javaGbkFileCol = FileUtils.listFiles(new File(srcDirPath), new String[] { "java" }, true);                for (File javaGbkFile : javaGbkFileCol) {                System.out.println(javaGbkFile);                // 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                FileUtils.writeLines(new File(utf8FilePath), "UTF-8", FileUtils.readLines(javaGbkFile, "GBK"));            }        } catch (Exception e) {
                e.printStackTrace();        }        }