java生成txt文件,读txt文件-优快云博客

本文提供两个使用Java进行文件读写的示例：第一个示例使用FileWriter和FileReader完成文本文件的写入与读取；第二个示例通过OutputStream和InputStream实现文件的字节流写入与读取。

1.方法1

public static void main(String[] args) {
        try {
            FileWriter fileWriter = new FileWriter("c:\\Result.txt");
            String ss = "cName\t\cCode\t\tcreateDate\n";
            ss += "dbc券\t\t111188\t\t2017-05-14\n";
            ss += "zc券\t\t111199\t\t2017-05-14\n";
            fileWriter.write(ss);
            fileWriter.flush();
            fileWriter.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println(">>>>>>>>>>>>>>>>>>write end");

        try {
            FileReader fileReader = new FileReader("c:\\Result.txt");
            BufferedReader br = new BufferedReader(fileReader);
            String s;
            while ((s = br.readLine()) != null) {
                System.out.println(s);
            }
            fileReader.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

　　　　System.out.println(">>>>>>>>>>>>>>>>>>read end");

2.方法2

public static void main(String[] args) {
        File f = new File("c:\\temp.txt");
        OutputStream out = null;
        try{
            out = new FileOutputStream(f);
        }catch (FileNotFoundException e){
            e.printStackTrace();
        }
        
        String ss = "cName\t\tcCode\t\tcreateDate\n";
        ss += "dbc券\t\t111188\t\t2017-05-14\n";
        ss += "zc券\t\t111199\t\t2017-05-14\n";
        // 将字符串转成字节数组
        byte b[] = ss.getBytes();
        try
        {
            // 将byte数组写入到文件之中
            out.write(b);
            out.close();
        }catch (IOException e1){
            e1.printStackTrace();
        }
        
        
        System.out.println("write end>>>>>>>>>>>");
        // 以下为读文件操作
        InputStream in = null;
        try{
            in = new FileInputStream(f);
        }catch (FileNotFoundException e3){
            e3.printStackTrace();
        }

        // 开辟一个空间用于接收文件读进来的数据
        byte b1[] = new byte[1024];
        int i = 0;
        try{
            // 将b1的引用传递到read()方法之中，同时此方法返回读入数据的个数
            i = in.read(b1);
            in.close();
        }catch (IOException e4){
            e4.printStackTrace();
        }

        // 将byte数组转换为字符串输出
        System.out.println(new String(b1, 0, i));
        System.out.println("read end>>>>>>>>>>>");

    }