IO流的文件读写

来源：互联网发布：大数据底层架构编辑：程序博客网时间：2024/06/05 00:38
 package Login;      import java.io.BufferedReader;  import java.io.BufferedWriter;  import java.io.FileInputStream;  import java.io.FileNotFoundException;  import java.io.FileOutputStream;  import java.io.FileReader;  import java.io.FileWriter;  import java.io.IOException;  import java.io.ObjectInputStream;  import java.io.ObjectOutputStream;      public class ObjectOutTest {  /* 将对象写入文件方法 */  public void write(Object o, String path) {     try {      /* 创建存取文件 */      FileOutputStream fileStream = new FileOutputStream(path);      /* 将存取文件写入对象 */      ObjectOutputStream os = new ObjectOutputStream(fileStream);      /* 写入对象 */      os.writeObject(o);      System.out.println("写入数据成功");      /* 关闭ObjectOutputStream */      os.close();     } catch (FileNotFoundException e) {      e.printStackTrace();     } catch (IOException e) {      e.printStackTrace();     }  }  /* 将对象从文件中读出来 */  public void read(String path) {     try {      /* 连接到要读取的文件 */      FileInputStream fileStream = new FileInputStream(path);      /* 怎样读取连接到的文件 */      ObjectInputStream os = new ObjectInputStream(fileStream);      /* 读取对象 */      Dog dog = (Dog) os.readObject();      System.out.println("输出结果：" + dog.getName() + " is a "        + dog.getSex() + ",高:" + dog.getHeight() + ",长:"        + dog.getLength());      /* 关闭对象 */      os.close();     } catch (FileNotFoundException e) {      e.printStackTrace();     } catch (IOException e) {      e.printStackTrace();     } catch (ClassNotFoundException e) {      e.printStackTrace();     }  }  /* 往文件写入字符串 */  public void wirteString(String path, String context) {     try {      /* 创建写入对象 */      FileWriter fileWriter = new FileWriter(path);      /* 创建缓冲区 */      BufferedWriter writer = new BufferedWriter(fileWriter);      /* 写入字符串 */      writer.write(context);      /* 关掉对象 */      writer.close();      System.out.println("写入字符串成功！");     } catch (IOException e) {      e.printStackTrace();     }  }  /* 读取文件中的字符串 */  public void readString(String path) {     try {      /* 创建读取对象 */      FileReader fileReader = new FileReader(path);      /* 创建缓存区 */      BufferedReader reader = new BufferedReader(fileReader);      /* 读取文件 */      String line = null;      while ((line = reader.readLine()) != null) {       System.out.println("读取成功：" + line);      }      /* 关闭对象 */      reader.close();     } catch (FileNotFoundException e) {      e.printStackTrace();     } catch (IOException e) {      e.printStackTrace();     }  }  /* 出函数入口 */  public static void main(String args[]) {     // Dog为外部类必须序列化才能实现它的对象的读取     Dog d = new Dog();     d.setHeight(12);     d.setLength(23);     d.setName("bobi");     d.setSex('b');     ObjectOutTest qqt = new ObjectOutTest();     qqt.wirteString("F:/IO/cc.sex", "chengchao 123456789");     qqt.readString("F:/IO/cc.sex");           }  }
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