JAVA 文件存储、写入

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package utils;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InvalidClassException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.Serializable;public class FileOperator {    /**     * 保存对象     *      * @param ser     * @param file     * @throws IOException     */    public static void saveObject(final Serializable ser, final String fileDir,            final String file) {        new Thread(new Runnable() {            public void run() {                FileOutputStream fos = null;                ObjectOutputStream oos = null;                File filePath = null;                try {                    filePath = new File(fileDir);                    if (!filePath.exists()) {                        filePath.mkdirs();                    }                    filePath = null;                    filePath = new File(fileDir, file);                    fos = new FileOutputStream(filePath, false);                    oos = new ObjectOutputStream(fos);                    oos.writeObject(ser);                    oos.flush();                } catch (Exception e) {                    e.printStackTrace();                } finally {                    try {                        oos.close();                    } catch (Exception e) {                    }                    try {                        fos.close();                    } catch (Exception e) {                    }                }            }        }).start();    }    /**     * 读取对象     *      * @param file     * @return     * @throws IOException     */    public static Serializable readObject(String file) {        File temp = new File(file);        if (!temp.exists())            return null;        FileInputStream fis = null;        ObjectInputStream ois = null;        try {            fis = new FileInputStream(temp);            ois = new ObjectInputStream(fis);            return (Serializable) ois.readObject();        } catch (FileNotFoundException e) {        } catch (Exception e) {            e.printStackTrace();            // 反序列化失败 - 删除文件            if (e instanceof InvalidClassException) {                if (null != temp) {                    temp.delete();                }            }        } finally {            try {                ois.close();            } catch (Exception e) {            }            try {                fis.close();            } catch (Exception e) {            }        }        return null;    }}
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