import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.util.Arrays;
import java.util.Properties;

/**
 * @author: rongyu
 * @Date: 2018-07-23 14:04:29
 */
public class Main {
    /**
     * 配置文件,你需要修改的键值对写入进去
     */
    private static String domainProperties = "A.properties";
    /**
     * 添加文件的备注
     */
    private static String comments = "rongyu";

    private static String projectPath = "E:\\code\\yousesky_hry_code";

    public static void main(String[] args) throws IOException {
        traverseFolder(projectPath);
    }

    public static String getMyProperties(String myProperties) {
        return Main.class.getResource("/").getPath() + myProperties;
    }

    public static Properties getProperties(String propertiesPath) throws IOException {
        FileReader fileReader = new FileReader(propertiesPath);
        Properties properties = new Properties();
        properties.load(fileReader);
        fileReader.close();
        return properties;
    }

    public static Properties transformation(Properties from, Properties to) {
        to.stringPropertyNames().forEach(
                x -> {
                    String value = from.getProperty(x);
                    if (value != null && !"".equals(value))
                        to.setProperty(x, value);
                }
        );
        return to;
    }

    public static void update(String path, String comments) throws IOException {
        String myPropertiesPath = getMyProperties(domainProperties);
        Properties myProperties = getProperties(myPropertiesPath);
        Properties targetProperties = getProperties(path);
        Properties transProperties = transformation(myProperties, targetProperties);
        transProperties.store(new FileOutputStream(path), comments);
    }


    public static void traverseFolder(String path) {
        File file = new File(path);
        if (file.exists()) {
            File[] files = file.listFiles();
            if (null == files || files.length == 0) {
                return;
            } else {
                Arrays.stream(files).forEach(
                        x -> {
                            if (x.isDirectory())
                                traverseFolder(x.getAbsolutePath());
                            else {
                                String name = x.getName();
                                if (name.contains(".")) {
                                    String substring = name.substring(name.lastIndexOf(".", name.length()));
                                    if (substring.equals(".properties")) {
                                        // TODO 替换文件
                                        System.out.println(x.getAbsolutePath());
                                        try {
                                            update(x.getAbsolutePath(), comments);
                                        } catch (IOException e) {
                                            System.out.println(x.getAbsolutePath() + "修改失败");
                                            e.printStackTrace();
                                        }
                                    }
                                }
                            }

                        }
                );
            }
        } else {
            System.out.println("文件不存在!");
        }
    }
}