指定编码格式读写文件和读取文件夹下所有文件

import java.io.BufferedReader;
import java.io.BufferedWriter;
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 org.junit.Test;

public class ReadWriteFileWithEncode {
	
	@Test
	public void gbkToUtf() throws Exception, Exception{
		String path = "d:/src";
//		readfile(path);
		deletefile(path);
		
	}
	
	/**
     * 读取某个文件夹下的所有文件
     */
    public static boolean readfile(String filepath) throws FileNotFoundException, IOException {
            try {

                    File file = new File(filepath);
                    if (!file.isDirectory()) {
                            System.out.println("文件");
                            System.out.println("path=" + file.getPath());
                            System.out.println("absolutepath=" + file.getAbsolutePath());
                            System.out.println("name=" + file.getName());

                    } else if (file.isDirectory()) {
                            System.out.println("文件夹");
                            String[] filelist = file.list();
                            for (int i = 0; i < filelist.length; i++) {
                                    File readfile = new File(filepath + "\\" + filelist[i]);
                                    if (!readfile.isDirectory()) {
                                            System.out.println("path=" + readfile.getPath());
                                            System.out.println("absolutepath="
                                                            + readfile.getAbsolutePath());
                                            System.out.println("name=" + readfile.getName());
                                            if(/*readfile.getName().endsWith(".java")*/true){
                                            	String content = ReadWriteFileWithEncode.read(readfile.getPath(), "gbk");
                                            	System.out
														.println("Content------------>"+content);
                                            	String path = readfile.getPath();
                                            	if(path.contains(":")){
                                            		path="E"+path.substring(1);
                                            		System.out.println("path------->"+path);
                                            	}
                                            	ReadWriteFileWithEncode.write(path,content,  "utf-8" );
                                            }
                                    } else if (readfile.isDirectory()) {
                                            readfile(filepath + "\\" + filelist[i]);
                                    }
                            }

                    }

            } catch (FileNotFoundException e) {
                    System.out.println("readfile()   Exception:" + e.getMessage());
            }
            return true;
    }

    
	/**
     * 删除某个文件夹下的所有文件
     */
    @Test
    public static boolean deletefile(String filepath) throws FileNotFoundException, IOException {
            try {

                    File file = new File(filepath);
                    if (!file.isDirectory()) {
                            System.out.println("文件");
                            System.out.println("path=" + file.getPath());
                            System.out.println("absolutepath=" + file.getAbsolutePath());
                            System.out.println("name=" + file.getName());

                    } else if (file.isDirectory()) {
                            System.out.println("文件夹");
                            String[] filelist = file.list();
                            for (int i = 0; i < filelist.length; i++) {
                                    File readfile = new File(filepath + "\\" + filelist[i]);
                                    if (!readfile.isDirectory()) {
                                            System.out.println("path=" + readfile.getPath());
                                            System.out.println("absolutepath="
                                                            + readfile.getAbsolutePath());
                                            System.out.println("name=" + readfile.getName());
                                            String path = readfile.getPath();
                                        	if(path.contains(":")){
                                        		path="E"+path.substring(1);
                                        		System.out.println("path------->"+path);
                                        	}
                                        	File file1 = new File(path);
                                            System.out.println(file1.delete());
//                                            if(readfile.getName().endsWith(".java")){
//                                            	String content = ReadWriteFileWithEncode.read(readfile.getPath(), "gbk");
//                                            	String path = readfile.getPath();
//                                            	if(path.contains(":")){
//                                            		path="E"+path.substring(1);
//                                            		System.out.println("path------->"+path);
//                                            	}
//                                            	ReadWriteFileWithEncode.write(path,content,  "utf-8" );
//                                            }

                                    } else if (readfile.isDirectory()) {
                                            readfile(filepath + "\\" + filelist[i]);
                                    }
                            }

                    }

            } catch (FileNotFoundException e) {
                    System.out.println("readfile()   Exception:" + e.getMessage());
            }
            return true;
    }

/**
 * 按指定格式写指定内容到指定文件中
 * @param path
 * @param content
 * @param encoding
 * @throws IOException
 */
	public static void write(String path, String content, String encoding)
			throws IOException {
		File file = new File(path);
		file.delete();
		file.createNewFile();
		BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
				new FileOutputStream(file), encoding));
		writer.write(content);
		writer.close();
	}
/**
 * 按指定格式读指定文件中的内容
 * @param path
 * @param encoding
 * @return
 * @throws IOException
 */
	public static String read(String path, String encoding) throws IOException {
		String content = "";
		File file = new File(path);
		BufferedReader reader = new BufferedReader(new InputStreamReader(
				new FileInputStream(file), encoding));
		String line = null;
		while ((line = reader.readLine()) != null) {
			content += line + "\n";
		}
		reader.close();
		return content;
	}

	public static void main(String[] args) throws IOException {
//		String content = "中文内容";
//		String path = "c:/test.txt";
//		String encoding = "utf-8";
//		ReadWriteFileWithEncode.write(path, content, encoding);
//		System.out.println(ReadWriteFileWithEncode.read(path, encoding));
		String path = "d:/src";
		readfile(path);
//		deletefile(path);
	}
	
	
	
}