案例 1-7: 利用 RandomAccessFile 向文件追加内容

/*
 * 案例 1-7: 利用 RandomAccessFile 向文件追加内容
 * 目标: 掌握 RandomAccessfile 的用法
 */
import java.io.*;

public class AppendFile {

 public static void main(String[] args) {
  String toAppend = args[0];
  try {
   int i = 0;
   String record = new String();
   String toCn = null;
   // 处理中文问题
   toCn = new String(toAppend.getBytes("GBK"), "ISO8859_1");

   RandomAccessFile rf = new RandomAccessFile("c:aaa.txt", "rw");
   rf.seek(rf.length());
   rf.writeBytes(toCn + "n");
   rf.close();

   RandomAccessFile rf2 = new RandomAccessFile("c:/aaa.txt", "r");
   String outCn = null;
   while ((record = rf2.readLine()) != null) {
    i++;
    // 处理中文问题
    outCn = new String(record.getBytes("ISO8859_1"), "GBK");

    System.out.println("Line " + i + ":" + outCn);
   }
   rf2.close();
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
 /*
  * 按如下命令方式运行这个程序 java AppendFile [内容] 将向文件中写入从控制台接收的字符串内容
  */
}
 

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