[原创]使用java批量修改文件编码（ANSI-->UTF-8）

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<File> 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();
        }

    }