Java .properties Parser

Parse and format Java .properties files per the JDK spec. Handles =/:/whitespace separators, line continuations, \uXXXX unicode escapes, and comments. Convert to and from JSON, or ASCII-escape non-ASCII characters like native2ascii.

Expand a.b.c keys into nested JSON ASCII-escape output (native2ascii)

.properties

Ready

JSON

Ready

Spec notes

Lines beginning with # or ! are comments (after optional leading whitespace).
Key and value are separated by the first unescaped =, :, or whitespace run.
A line ending in an odd number of \ is continued on the next line (leading whitespace stripped).
Escape sequences in values: \t, \n, \r, \f, \\, \=, \:, \uXXXX.
When writing, non-ASCII characters are escaped to \uXXXX if the ASCII option is enabled.

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