Java利用Properties类读写配置文件

适用场景:代码当中需要读取配置文件进行操作时,可以用Properties类进行读写方便快捷

1、获取配置文件中的值放入到Properties中

private static synchronized Properties get() {
    FileInputStream fis = null;
    Properties props = new Properties();
    try {
        Log.d(TAG, "get()--getPath():" + getAdbConfigPath());
        File file = null;
        file = new File(getAdbConfigPath());
        if (!file.exists()) {
            try {
                Log.d(TAG, "get()--getPath():----createNewFile()");
                file.createNewFile();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        Log.d(TAG, "get()--file:" + file.length());
        fis = new FileInputStream(file);
        props.load(fis);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            fis.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return props;
}

2、获取配置文件并对其进行更新

public static synchronized void setProps(Properties p) {
    FileOutputStream fos = null;
    try {
        File file = null;
        file = new File(getAdbConfigPath());
        Log.d(TAG, "Properties---setProps(String configName, Properties p)--写文件路径:file:" + file.length());
        fos = new FileOutputStream(file);
        p.store(fos, null);
    } catch (Exception e) {
        Log.d(TAG, "Properties---setProps(String configName, Properties p)---写文件异常抛出");
        e.printStackTrace();
    } finally {
        Log.d(TAG, "Properties---setProps(String configName, Properties p)---写文件关闭");
        try {
            fos.flush();
            fos.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

3、编写对外提供读取值方法,根据传进来的key值进行读取Value值

public String get(String key) {
    Properties props = get();
    String propsValue = null;
    if (props != null) {
        propsValue = props.getProperty(key);
        Log.d(TAG, "get(String key)--propsValue:" + propsValue);
    }
    return propsValue;
}

4、编写对外提供写入Value值的方法,传入的参数为键值对。

public void set(String key, String value) {
    Log.d(TAG, "set(String key, String value)--- key:" + key + " value:" + value);
    Properties props = get();
    props.setProperty(key, value);
    setProps(props);
}
 
 

5、编写对外提供的删除方法,传入参数为key值

public void remove(String configName, String... key) {
    Properties props = get();
    for (String k : key) {
        props.remove(k);
    }
    setProps(props);
}




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转载自blog.csdn.net/youzi749/article/details/79473339