<转>java序列化读取与文本文件读取数据效率对比 - 笑天的日志 - 网易博客
ArrayList al = new ArrayList();
try {
FileWriter fw = new FileWriter(new File("e:\\s.txt"));
for(int i=0;i<1000;i++){
String str = "000\t111\t222\t222\t222\t222\t222\t222\t222\t222\n";
al.add(str);
fw.write(str);
}
fw.close();
FileOutputStream fileStream = new FileOutputStream("e:\\s.obj");
ObjectOutputStream out = new ObjectOutputStream(fileStream);
out.writeObject(al);
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
ArrayList al = new ArrayList();
try {
long t = System.currentTimeMillis();
FileInputStream fileStream = new FileInputStream("e:\\s.obj");
BufferedInputStream br = new BufferedInputStream(fileStream);
ObjectInputStream in = new ObjectInputStream(br);
al = (ArrayList)in.readObject();
in.close();
System.out.println(System.currentTimeMillis()-t);
} catch (Exception e) {
e.printStackTrace();
}
}
//文本文件读取:
public static void main(String[] args) {
ArrayList al = new ArrayList();
try {
long t = System.currentTimeMillis();
FileReader fw = new FileReader(new File("e:\\s.txt"));
BufferedReader br = new BufferedReader(fw);
String s = br.readLine();
while (s != null) {
al.add(s);
s = br.readLine();
}
br.close();
fw.close();
System.out.println(System.currentTimeMillis()-t);
} catch (Exception e) {
e.printStackTrace();
}
}
在行数i=10000时,序列化读取平均46,文本文件读取平均46。
在行数i=100000时,序列化读取平均96,文本文件读取平均316。
引文来源 <转>java序列化读取与文本文件读取数据效率对比 - 笑天的日志 - 网易博客