import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;

/**
 * @ClassName WriterStringToFile
 * @projectName: object1
 * @author: Zhangmingda
 * @description： XXX
 * date: 2021/4/17.
 */
public class WriterStringToFile {
    public static void main(String[] args) throws IOException {
        String fileFath = "输入输出文件读写/src/test/output/writerOut.txt";
        Writer writer = new FileWriter(fileFath);
        writer.write(97);//写入字符编码
        writer.write(‘b‘); //写入字符
        char[] chars = {‘e‘,‘f‘};
        writer.write(chars);
        String text = "剑门关-V哥\n" +
                "北望剑阁一线天,\n" +
                "遥想翼德战关前。\n" +
                "纵使王朝风云变,\n" +
                "雄关笑傲数千年。";
        writer.write(text);
//        writer.flush();
        writer.close();
    }
}

import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
/**
 * @ClassName ReaderStringFromFile
 * @projectName: object1
 * @author: Zhangmingda
 * @description： XXX
 * date: 2021/4/17.
 */
public class ReaderStringFromFile {
    public static void main(String[] args) throws IOException {
        String srcPath = "输入输出文件读写/src/test/output/writerOut.txt";
        Reader fileReader = new FileReader(srcPath);
        StringBuffer text = new StringBuffer();
        char[] characters = new char[1024];
        int length;
        while ((length = fileReader.read(characters)) != -1) {
//            System.out.println( characters);
            text.append(characters,0,length);
            System.out.println("读取到字符个数：" + length);
        }
        fileReader.close(); //关闭字符流
        System.out.println(text);
    }
}