Question

我正在使用java.util.Properties从属性文件加载属性。有没有办法在加载数据时自动删除值的空格？目前我正在使用：

Properties properties = new Properties();
FileInputStream file = new FileInputStream(/path/to/file);
properties.load(file);

Answer 1

您可以扩展Properties类并覆盖其getProperty(String key)方法以返回剪裁后的字符串。

public class MyProperties extends Properties {
    @Override
    public String getProperty(String key) {
         return super.getProperty(key).trim();
    }
}

使用它：

MyProperties properties = new MyProperties ();
FileInputStream file = new FileInputStream(/path/to/file);
properties.load(file);
//Now any propery you get will be returned trimmed
properties.getProperty("test"); //will be returned trimmed

Answer 2

我得到的唯一可能的工作是，如果它对某些人有帮助，这不会影响已经存在的Properties类引用。

Properties properties = new Properties();
FileInputStream file = new FileInputStream(/path/to/file);
properties.load(file);
for (Entry<Object, Object> entry : properties.entrySet()) {
    entry.setValue(entry.getValue().toString().trim());
}

Answer 3

    Properties config = new Properties();
    String configFile = "config/apps.properties";
    try (FileReader fr = new FileReader(configFile)) {
        config.load(fr);
        System.out.println(config);
        for (String k : config.stringPropertyNames()) {
            config.setProperty(k, config.getProperty(k).trim());
        }
        System.out.println(config);
    } catch (IOException ex) {
        System.out.printf("Error: Failed to load config file %s due to exception: %s\n", configFile, ex.toString());
        System.exit(1);
    }

为加载到java.util.Properties中的Props文件中的属性自动修剪尾随空格

3 个答案: