File操作类

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;
import java.util.ArrayList;
import java.util.List;

/**
 * 
 * @author 
 * @since 
 */
public class FileUtil {

	public static List<File> getAllFile(String root){
		List list=new ArrayList();
		getAllFile(list,root);
		return list;
	}
	
	private static void getAllFile(List<File> list, String root) {
		File f = new File(root);
		if (f.isDirectory()) {
			File[] fList = f.listFiles();
			for (int j = 0; j < fList.length; j++) {
				if (fList[j].isDirectory()) {
					getAllFile(list, fList[j].getPath());
				}
				if (fList[j].isFile()) {
					list.add(fList[j]);
				}
			}
		}else{
			list.add(f);
		}
	}

	public static String readFile(String filePath, String charsetname) {
		try {
			FileInputStream fileInputStream = new FileInputStream(filePath);
			StringBuffer buffer = new StringBuffer();
			String line;
			BufferedReader reader = new BufferedReader(new InputStreamReader(fileInputStream, charsetname));
			line = reader.readLine();
			while (line != null) {
				buffer.append(line);
				buffer.append("\n");
				line = reader.readLine();
			}
			String text= buffer.toString();
			reader.close();
			return text;
		} catch (Exception ex) {
			throw new RuntimeException(ex);
		}
	}

	public static String readFile(String filePath) {
		return readFile(filePath, "UTF-8");
	}

	/**
	 * 生成文件
	 * 
	 * @throws IOException
	 */
	public static String createClass(String projectPath, String packageName, String className, String content)
			throws IOException {
		String directory = projectPath + "/src/" + packageName.replaceAll("\\.", "/") + "/";
		File directoryFile = new File(directory);
		directoryFile.mkdirs();
		String fileName = directory + "/" + className + ".java";
		return createFile(fileName, content);
	}

	public static String createFile(String fileName, String content) {
		try {
			File file = new File(fileName);
			
			String dir=getDir(fileName);
			File dirFile=new File(dir);
			dirFile.mkdirs();
			
			OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream(file), "UTF-8");
			BufferedWriter bufferedWriter = new BufferedWriter(osw);
			bufferedWriter.write(content);
			bufferedWriter.flush();
			bufferedWriter.close();
			return fileName;

		} catch (Exception ex) {
			throw new RuntimeException(ex);
		}

	}

	public static String getName(String fileName) {
		int start = fileName.lastIndexOf('\\');
		if (start == -1) {
			start = fileName.lastIndexOf('/');
		}
		int end = fileName.lastIndexOf('.');
		return fileName.substring(start + 1, end);
	}

	public static String getFullName(String fileName) {
		int start = fileName.lastIndexOf('\\');
		return fileName.substring(start + 1);
	}

	public static String readClassPathFile(String fileName) {
		String path = FileUtil.class.getResource("/").getPath() + "/" + fileName;
		return readFile(path);

	}
	
	public static String getDir(String fileName){
		int index=fileName.lastIndexOf("/");
		if(index==-1){
			index=fileName.lastIndexOf("\\");
		}
		return fileName.substring(0,index);
	}
}