IO输入输出

[java] view plain copy

 

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");


}
}