FileWriter

 

package file;

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

public class Demo6 {
    public static void main(String[] args) throws IOException {
        writeTest1();
    }
    
    public static void writeTest1() throws IOException {
        File file = new File("F:\\2.txt");
        FileWriter fileWriter = new FileWriter(file);    
//        FileWriter fileWriter = new FileWriter(file,true);//如果追加，使用FileWriter(file,true)
        //准备数据，写出
        String data = "测试123数据";
        fileWriter.write(data);
        //关闭资源
//        fileWriter.flush();
        fileWriter.close();
        
    }
}