Java--FileWriter

• 創建流對象，建立數據存放文件
  FileWriter fw=new FileWriter(“a.txt”);

• 調用流對象的寫入方法，將數據寫入流
  fw.writer(“asdfg”);

• 關閉流資源，將流中數據清空到文件中
  fw.close();

package chapter12;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class FileWriterDemo {
	public static void main(String[] args) throws IOException
	{
		File f=new File("a.txt");     //相對路徑
		FileWriter fw=new FileWriter(f);
		fw.write("asdfggh");
		//fw.flush();     //刷新
		fw.close();     //關閉數據流     自帶刷新功能
		
	}
}

package chapter12;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class FileWriterDemo {
	public static void main(String[] args) throws IOException
	{
		File f=new File("a.txt");     //相對路徑
		FileWriter fw=new FileWriter(f,true);     //在原來的字符串後加上新的字符串
		fw.write(" ZheShiXinChuan");
		//fw.flush();     //刷新
		fw.close();     //關閉數據流     自帶刷新功能
		
	}
}

package chapter12;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class FileWriterDemo {
	public static void main(String[] args) throws IOException
	{
		File f=new File("a.txt");     //相對路徑
		FileWriter fw=new FileWriter(f,true);     //在原來的字符串後加上新的字符串
		fw.write("\r\nZheShiHuanHang");          //   \r\n用來換行  
		//fw.flush();     //刷新
		fw.close();     //關閉數據流     自帶刷新功能
		
	}
}