IO流的檔案寫入與讀取

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 {
/* 将對象寫入檔案方法 */
public void write(Object o, String path) {
   try {
    /* 建立存取檔案 */
    FileOutputStream fileStream = new FileOutputStream(path);
    /* 将存取檔案寫入對象 */
    ObjectOutputStream os = new ObjectOutputStream(fileStream);
    /* 寫入對象 */
    os.writeObject(o);
    System.out.println("寫入資料成功");
    /* 關閉ObjectOutputStream */
    os.close();
   } catch (FileNotFoundException e) {
    e.printStackTrace();
   } catch (IOException e) {
    e.printStackTrace();
   }
}
/* 将對象從檔案中讀出來 */
public void read(String path) {
   try {
    /* 連接配接到要讀取的檔案 */
    FileInputStream fileStream = new FileInputStream(path);
    /* 怎樣讀取連接配接到的檔案 */
    ObjectInputStream os = new ObjectInputStream(fileStream);
    /* 讀取對象 */
    Dog dog = (Dog) os.readObject();
    System.out.println("輸出結果：" + dog.getName() + " is a "
      + dog.getSex() + ",高:" + dog.getHeight() + ",長:"
      + dog.getLength());
    /* 關閉對象 */
    os.close();
   } catch (FileNotFoundException e) {
    e.printStackTrace();
   } catch (IOException e) {
    e.printStackTrace();
   } catch (ClassNotFoundException e) {
    e.printStackTrace();
   }
}
/* 往檔案寫入字元串 */
public void wirteString(String path, String context) {
   try {
    /* 建立寫入對象 */
    FileWriter fileWriter = new FileWriter(path);
    /* 建立緩沖區 */
    BufferedWriter writer = new BufferedWriter(fileWriter);
    /* 寫入字元串 */
    writer.write(context);
    /* 關掉對象 */
    writer.close();
    System.out.println("寫入字元串成功！");
   } catch (IOException e) {
    e.printStackTrace();
   }
}
/* 讀取檔案中的字元串 */
public void readString(String path) {
   try {
    /* 建立讀取對象 */
    FileReader fileReader = new FileReader(path);
    /* 建立緩存區 */
    BufferedReader reader = new BufferedReader(fileReader);
    /* 讀取檔案 */
    String line = null;
    while ((line = reader.readLine()) != null) {
     System.out.println("讀取成功：" + line);
    }
    /* 關閉對象 */
    reader.close();
   } catch (FileNotFoundException e) {
    e.printStackTrace();
   } catch (IOException e) {
    e.printStackTrace();
   }
}
/* 出函數入口 */
public static void main(String args[]) {
   // Dog為外部類必須序列化才能實作它的對象的讀取
   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");
  
   
}
}