非常实用的Java文件操作类

来源：互联网发布：繁体字转换简体字 mac 编辑：程序博客网时间：2024/05/17 23:59
import java.io.BufferedInputStream;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileReader;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.Arrays;/** * 一个非常实用的文件操作类 *  * @author zhangjunying *  */public class TextFile extends ArrayList<String> {    private static final long serialVersionUID = -1942855619975438512L;    // 以字符串形式读取文件    public static String read(String filename) {        StringBuilder sb = new StringBuilder();        try {            BufferedReader in = new BufferedReader(new FileReader(new File(                    filename).getAbsoluteFile()));            String s;            try {                while ((s = in.readLine()) != null) {                    sb.append(s);                    sb.append("\n");                }            } finally {                in.close();            }        } catch (IOException e) {            throw new RuntimeException(e);        }        return sb.toString();    }    // 在一个方法调用中写一个文件    public static void write(String fileName, String text) {        try {            PrintWriter out = new PrintWriter(                    new File(fileName).getAbsoluteFile());            try {                out.print(text);            } finally {                out.close();            }        } catch (IOException e) {            throw new RuntimeException(e);        }    }    // 读取一个文件，通过任何正则表达式拆分    public TextFile(String fileName, String splitter) {        super(Arrays.asList(read(fileName).split(splitter)));        if (get(0).equals(""))            remove(0);    }    // 正常按行读取    public TextFile(String fileName) {        this(fileName, "\n");    }    public void write(String fileName) {        try {            PrintWriter out = new PrintWriter(                    new File(fileName).getAbsoluteFile());            try {                for (String item : this)                    out.println(item);            } finally {                out.close();            }        } catch (IOException e) {            throw new RuntimeException(e);        }    }    /**     * 读取二进制文件     *      * @param file     *            file对象     * @return     * @throws IOException     */    public static byte[] BinaryFile(File file) throws IOException {        BufferedInputStream bf = new BufferedInputStream(new FileInputStream(                file));        try {            byte[] data = new byte[bf.available()];            bf.read(data);            return data;        } finally {            bf.close();        }    }    /**     * 读取二进制文件     *      * @param file     *            文件路径     * @return     * @throws IOException     */    public static byte[] BinaryFile(String file) throws IOException {        return BinaryFile(new File(file).getAbsoluteFile());    }    // 测试，我已经在根目录生成了一个名为reflectDemo.java的文件    public static void main(String[] args) {        String path = "/home/zhangjunying/Workspaces/MyEclipse Professional 2014/BasicInterviewQuestions/src/reflectDemo.java";        /* read() 测试 */        System.out.println(read(path));        /* write() 测试 */        write("out.d", "测试写");        /* 构造测试 */        TextFile tf = new TextFile(path);    }}
阅读全文
0 0