实用代码块记录6

序列化保存工具

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import android.text.TextUtils;

/**
* 序列化保存工具
*/
public class SerializeUtils {

/**
* 保存序列化对象
*
* @param filePath
*            保存路径
* @param obj
*            序列化对象
*/
public static void saveObject(String filePath, Serializable obj) {
if (obj == null) {
return;
}
File file = new File(filePath);
if (file.exists()) {
file.delete();
}
DataOutputStream dos = null;
ObjectOutputStream oos = null;
try {
dos = new DataOutputStream(new FileOutputStream(file));
oos = new ObjectOutputStream(dos);
oos.writeObject(obj);
} catch (Exception e) {
file.delete();
} finally {
if (dos != null) {
try {
dos.close();
} catch (Exception e) {
}
}
if (oos != null) {
try {
oos.close();
} catch (Exception e) {
}
}
}
}

/**
* 读取序列化对象
*
* @param filePath
*            保存路径
* @return 序列化对象
*/
public static Object readObject(String filePath) {
if (TextUtils.isEmpty(filePath)) {
return null;
}
File file = new File(filePath);
DataInputStream dis = null;
ObjectInputStream ois = null;
Object obj = null;
try {
dis = new DataInputStream(new FileInputStream(file));
ois = new ObjectInputStream(dis);
obj = ois.readObject();
} catch (Exception e) {
} finally {
if (dis != null) {
try {
dis.close();
} catch (IOException e) {
}
}
if (ois != null) {
try {
ois.close();
} catch (IOException e) {
}
}
}
return obj;
}

/**
* 删除保存文件
*
* @param filePath
*            保存路径
*/
public static void removeObject(String filePath) {
File file = new File(filePath);
file.delete();
}
}