java下radomAccessFile文件写入读取
时间：2021-07-01 10:21:17
帮助过：2人阅读
cn.stat.p2.demo;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
public class randomaccessfiledemo {
/**
* @param args
* @throws IOException
*/
public static void main(String[] args)
throws IOException {
// TODO Auto-generated method stub
radomwrite();
radomread();
}
public static void radomread()
throws FileNotFoundException, IOException {
RandomAccessFile raf=
new RandomAccessFile("demo.txt","rw"
);
byte[] buf=
new byte[4
];
raf.read(buf);
String name=
new String(buf);
int age=
raf.readInt();
System.out.println("name="+
name);
System.out.println("age="+
age);
//获取指针位置
System.out.println("当前位置="+
raf.getFilePointer());
//设定指针位置
raf.seek(1*12
);
System.out.println("age="+
raf.readInt());
raf.close();
}
public static void radomwrite()
throws FileNotFoundException, IOException {
RandomAccessFile raf=
new RandomAccessFile("demo.txt","rw"
);
raf.write("张三"
.getBytes());
raf.writeInt(97
);
raf.write("赵六"
.getBytes());
raf.writeInt(98
);
raf.close();
}
}
java下radomAccessFile文件写入读取
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