封装的java操作文件属性的工具类---优化版

我们在用纯Java开发桌面客户端的时候，一版需要把一些配置信息保存下来。这里用到了properties属性。在此我对基本的文件属性操作增删改查封装了一个简单的工具类。使用的时候直接调用即可。。

package cn.zxw.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.net.URL;
import java.util.Map;
import java.util.Properties;

/**
 * @author zxw
 */
public class PropertiesUtil {
    private Logger logger = LoggerFactory.getLogger(StringUtil.class);

    private StringUtil() {

    }

    public static String getRootPath(URL url) {
        String fileUrl = url.getFile();
        int pos = fileUrl.indexOf('!');

        if (-1 == pos) {
            return fileUrl;
        }

        return fileUrl.substring(5, pos);
    }



    public static String trimExtension(String name) {
        int pos = name.lastIndexOf('.');
        if (-1 != pos) {
            return name.substring(0, pos);
        }

        return name;
    }

    /**
     * @param uri
     * @return
     */
    public static String trimURI(String uri) {
        String trimmed = uri.substring(1);
        int splashIndex = trimmed.indexOf('/');

        return trimmed.substring(splashIndex);
    }

    /**
     *
     * @param name
     * @return
     * @description 获取相对于resources目录下的路径
     */
    public static String getFilePathInResources(String name) {
        String resources = "resources";
        int resIdx = name.indexOf(resources);
        if (resIdx == -1) {
            return name;
        }
        return name.substring(resIdx + resources.length() + 1);
    }

    /**
     * @param name 文件名
     * @return
     * @version 1.2
     */
    public static String getFileBaseName(String name) {
        String result = "";
        String[] tempStrs = name.split("/");
        if (1 == tempStrs.length) { //只有文件名，即name: languageDemo.fxml
            result = StringUtil.trimExtension(name);
        } else {
            result = StringUtil.trimExtension(tempStrs[tempStrs.length - 1]);
        }
        return result;
    }

    /**
     * 功能描述:删除文件 

     * @Param: [fileName]
     * @Return: boolean
     * @Author: zxw
     * @Date: 2020/7/4 20:41
     */
    public static boolean deleteFile(String fileName) {
        File file = new File(fileName);
        // 如果文件路径所对应的文件存在，并且是一个文件，则直接删除
        if (file.exists() && file.isFile()) {
            if (file.delete()) {
                System.out.println("删除单个文件" + fileName + "成功！");
                return true;
            } else {
                System.out.println("删除单个文件" + fileName + "失败！");
                return false;
            }
        } else {
            System.out.println("删除单个文件失败：" + fileName + "不存在！");
            return false;
        }
    }


//把属性以键值对的形势写入文件
    public static void writeFile(String fileName, Properties prop) {
        try {
            FileOutputStream oFile = new FileOutputStream(fileName, false);
            prop.store(oFile, null);
            oFile.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    /**
     * 获取Properties对象
     * @return
     */
    public static Properties getProperties(String fileName){
        Properties properties = null;
        InputStream inputStream = null;
        try {
            if (new File(fileName).exists()) {
                properties = new Properties();
                InputStream in = new BufferedInputStream(new FileInputStream(fileName));
                properties.load(in);
            }
        } catch (FileNotFoundException e) {
            System.out.println(fileName+"文件未找到!");
        } catch (IOException e) {
            System.out.println("出现IOException");
        } finally {
            try {
                if (null != inputStream){
                    inputStream.close();
                }
            } catch (IOException e) {
                System.out.println(fileName+"文件流关闭出现异常");
            }
        }
        return properties;
    }

}

使用案例：

写入----键值对

 Properties prop = new Properties();
   prop.setProperty("userName", userName);
   prop.setProperty("passwordf", passwordf);
   prop.setProperty("remember_user", "true");
   prop.setProperty("login_auto", "false");

 PropertiesUtil.writeFile("login.properties",prop);//调用工具类----写入建值

读取---键值对

 try {
      Properties properties = StringUtil.getProperties("login.properties");
      if(properties!=null){
         String userName = properties.get("userName").toString();
         String passwordf = properties.get("passwordf").toString();
         String login_auto = properties.get("login_auto").toString();//是否自动登录
         String remember_user = properties.get("remember_user").toString();//记住用户名密码      
      }
 } catch (Exception e) {
        e.printStackTrace();
   }