参见英文答案 > Saving to properties file escapes :                                    2个
示例代码：

public final class Test
{
    public static void main(final String... args)
        throws IOException
    {
        final Properties properties = new Properties();

        properties.setProperty("foo","bar:baz");

        // Yeah,this supposes a Unix-like system
        final Path path = Paths.get("/tmp/x.properties");

        try (
            // Requires Java 8!
            final Writer writer = Files.newBufferedWriter(path);
        ) {
            properties.store(writer,null);
        }
    }
}

现在,当我：

$cat /tmp/x.properties 
# The date here
foo=bar\:baz

冒号用反斜杠逃脱.事实上,所有的冒号都是.

奇怪的是,如果我手动生成属性文件并且不“冒走”冒号,那么也会读取属性.

那么,为什么属性的写入过程(无论你是使用Writer还是OutputStream都是这种情况)以这种方式逃避冒号？