对文件封装util

来源：互联网发布：女人狼牙套用后感知乎编辑：程序博客网时间：2024/05/18 00:53
package com.tools.util;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;public class FileUtil {    public static void writeObject2File(Object obj, String path) {        File file = new File(path);        writeObject2File(obj, file);    }    /**     * 写 object     * @param obj     * @param file     */    public static void writeObject2File(Object obj, File file) {        FileOutputStream out;        try {            out = new FileOutputStream(file);            ObjectOutputStream objOut = new ObjectOutputStream(out);            objOut.writeObject(obj);            objOut.flush();            objOut.close();        } catch (IOException e) {            e.printStackTrace();        }    }    public static Object readObjectFromFile(String path) {        File file = new File(path);        return readObjectFromFile(file);    }    /**     * 读取保存的object     * @param file     * @return     */    public static Object readObjectFromFile(File file) {        Object temp = null;        FileInputStream in;        try {            in = new FileInputStream(file);            ObjectInputStream objIn = new ObjectInputStream(in);            temp = objIn.readObject();            objIn.close();        } catch (IOException e) {            e.printStackTrace();        } catch (ClassNotFoundException e) {            e.printStackTrace();        }        return temp;    }    /**     * 文件copy     * @param oldPath     * @param newPath     */    public static void copy(String oldPath, String newPath) {        FileInputStream fis = null;        FileOutputStream fos = null;        int byteread = 0;        File oldfile = new File(oldPath);        try {            if (oldfile.exists()) {                fis = new FileInputStream(oldPath);                fos = new FileOutputStream(newPath);                byte[] buffer = new byte[1024];                while ((byteread = fis.read(buffer)) != -1) {                    fos.write(buffer, 0, byteread);                }            }        } catch (Exception e) {            e.printStackTrace();        } finally {            try {                if (fis != null) {                    fis.close();                }                if (fos != null) {                    fos.close();                }            } catch (IOException e) {                e.printStackTrace();            }        }    }public static File getCacheDir(Context ctx) {    File file = ctx.getExternalCacheDir();    if (file == null) {        file = ctx.getCacheDir();    }    return file;}public static File getImgFileDir(Context ctx) {    File file = ctx.getExternalFilesDir(Environment.DIRECTORY_PICTURES);    if (file == null) {        file = ctx.getFilesDir();    }    return file;}public static File getTempDir() {    File file = Environment.getExternalStorageDirectory();    File tempDir = new File(file.getAbsoluteFile() + "/iasku/temp/");    if (!tempDir.exists()) {        //可以创建当前的file  没有上级目录的 也可以创建        tempDir.mkdirs();    }    return tempDir;}public static File getDownloadDir() {    String path = Environment.getExternalStorageDirectory().getAbsoluteFile() + "/iasku/downloads/";    File file = new File(path);    if (!file.exists()) {        file.mkdirs();    }    return file;}/** * 音频文件保存路径 * @return */public static File getDownloadAudioDir() {    String path = Environment.getExternalStorageDirectory().getAbsoluteFile() + "/iasku/audio/";    File file = new File(path);    if (!file.exists()) {        file.mkdirs();    }    return file;}
}
0 0