Java I/O流之打印流详细使用方法教程

public static void main(String[] args) throws Exception {
    // 方式一: 打印流通向字节输出流管道
    PrintStream ps1 = new PrintStream(new FileOutputStream("/Users/chenyq/Documents/test.txt"));

    // 方式二: 打印流通向文件对象
    PrintStream ps2 = new PrintStream(new File("/Users/chenyq/Documents/test.txt"));

    // 方式三: 打印流通向文件路径
    PrintStream ps3 = new PrintStream("/Users/chenyq/Documents/test.txt");
}

public static void main(String[] args) throws Exception {
    PrintStream ps = new PrintStream(new FileOutputStream("/Users/chenyq/Documents/test.txt"));

    // 打印流方法
    ps.println(97);
    ps.println("aaa");
    ps.println(123);
    ps.println('我');
    ps.println(true);

    // 关闭流
    ps.close();
}

public static void main(String[] args) throws Exception {
    PrintWriter pw = new PrintWriter(new FileOutputStream("/Users/chenyq/Documents/test.txt"));

    // 打印流方法
    pw.println(97);
    pw.println("aaa");
    pw.println(123);
    pw.println('我');
    pw.println(false);

    // 关闭流
    pw.close();
}

public static void main(String[] args) throws Exception {
    PrintStream ps = new PrintStream(new FileOutputStream("/Users/chenyq/Documents/test.txt"));

    // PrintStream写字节数据
    ps.write("我爱学习".getBytes());
}

public static void main(String[] args) throws Exception {
    PrintWriter pw = new PrintWriter(new FileOutputStream("/Users/chenyq/Documents/test.txt"));

    // PrintWrite写字符数据
    pw.write("我爱学习");
}

public static void main(String[] args) throws Exception {
    // 在原始字符输出流开启追加模式
    PrintWriter pw = new PrintWriter(new FileOutputStream("/Users/chenyq/Documents/test.txt", true));
}

public static void main(String[] args) throws Exception {
    PrintStream ps = new PrintStream("/Users/chenyq/Documents/test.txt");

    // 改变输出语句的位置(重定向), 将输出语句输出到文件当中
    System.setOut(ps);
    System.out.println("aaa");
    System.out.println(97);
    System.out.println(123);
    System.out.println('我');
}