有时 Properties.load() 跳过行

Question

Properties.load() 在以下情况下跳过 InputStream 的第二行。这是 Java 的错误还是正常行为？

public class PropTest {
    public static void main(String[] args) throws Exception {
        propTest("Test1", "prop=cat,\" + System.lineSeparator() + "dog");
        propTest("Test2", "prop=cat,\  " + System.lineSeparator() + "dog");
    }
    public static void propTest(String name, String test) throws Exception {
        ByteArrayInputStream stream = new ByteArrayInputStream(test.getBytes());
        Properties properties = new Properties();
        properties.load(stream);
        System.out.println(properties.get("prop"));
    }
}

运行此代码产生以下结果：

猫狗

猫,

Answer 1

根据 Properties file format

A property value can span several lines if each line is terminated by a backslash (‘\’) character.

您在第二个版本中有尾随 space。所以这条线没有继续。注意whitespace规则，有点乱。

White space that appears between the property name and property value is ignored,

和

White space at the beginning of the line is also ignored.

所以这意味着行尾的白色 space 没有被明确忽略。

有时 Properties.load() 跳过行

Sometimes Properties.load() skip lines

java

properties