/**

 * xiangqiao123欢迎你  如果对代码有疑问可以加qq群咨询：151648295

 *

 * 读取MyFile文件

 */

package com.xiangqiao123.file;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStreamReader;

public class ReadFile {

    public static void main(String[] args) {

        try {

            // 注意路径的写法，java默认的路径是到根目录下

            File f = new File("src/MyFile.text");

            if (f.isFile() && f.exists()) {

                // 进行编码转换，避免出现乱码

                InputStreamReader read = new InputStreamReader(new FileInputStream(f), "utf-8");

                BufferedReader br = new BufferedReader(read);

                String line = null;

                while ((line = br.readLine()) != null) {

                    System.out.println(line);

                }

                read.close();

            }else {

                System.out.println("文件读取失败");

            }

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

/**

 * xiangqiao123欢迎你  如果对代码有疑问可以加qq群咨询：151648295

 *

 *向文件里面写内容

 */

package com.xiangqiao123.file;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileOutputStream;

import java.io.OutputStreamWriter;

public class WriteFile {

    public static void main(String[] args) {

        // 注意文件的路径写法

        File f = new File("src/MyFile.text");

        if (f.isFile() && f.exists()) {

            System.out.println("123");

            try {

                // new FileOutputStream(f, true)

                // 第二个参数是true表示以后写的内容不会覆盖原来的，而是添加内容

                OutputStreamWriter writer = new OutputStreamWriter(

                        new FileOutputStream(f, true), "utf-8");

                BufferedWriter bw = new BufferedWriter(writer);

                // BufferedWriter bw=new BufferedWriter(new FileWriter(f,true));

                bw.write("写入文件的内容");

                // 换行操作

                bw.newLine();

                // 清除缓冲，如果不写：信息不会写入文件

                bw.flush();

                writer.close();

            } catch (Exception e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

    }

}

/**

 *xiangqiao123欢迎你  如果对代码有疑问可以加qq群咨询：151648295

 *

    读取配置文件info.properties

 */

package com.xiangqiao123.file;

import java.io.File;

import java.io.FileInputStream;

import java.util.Properties;

public class ReadInfoFile {

    public static void main(String[] args) {

        Properties p = new Properties();

      //注意路径

        File f = new File("src/info.properties");

        try {

            FileInputStream fis = new FileInputStream(f);

            p.load(fis);

            System.out.println(p.get("first"));

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

}

/**

 * xiangqiao123欢迎你  如果对代码有疑问可以加qq群咨询：151648295

 *

 * 网配置文件里面写内容

 */

package com.xiangqiao123.file;

import java.io.File;

import java.io.FileOutputStream;

import java.util.Properties;

public class WriteInfoFile {

    public static void main(String[] args) {

        Properties p = new Properties();

        File f = new File("src/info.properties");

        try {

            FileOutputStream fos = new FileOutputStream(f, true);

            // 要添加的内容

            p.setProperty("first", "hello");

            p.store(fos, null);

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

}