将 PLIST 转换为 JSON 的命令行工具？

The code is fairly simple to do this:

NSArray* array = [[NSArray arrayWithContentsOfFile:[@"~/input.plist" stringByExpandingTildeInPath]]retain];
SBJsonWriter* writer = [[SBJsonWriter alloc] init];
NSString* s = [[writer stringWithObject:array] retain];
[s writeToFile:[@"~/output.json" stringByExpandingTildeInPath] atomically:YES];
[array release];

I never got around to making it accept arguments as I only needed to do 3 files.

The following gets the job done—

// convertPlistToJSON.m
#import <Foundation/Foundation.h>
#import "JSONKit.h"


int main(int argc, char *argv[]) {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];


if(argc != 3) { fprintf(stderr, "usage: %s FILE_PLIST FILE_JSON\n", argv[0]); exit(5); }


NSString *plistFileNameString = [NSString stringWithUTF8String:argv[1]];
NSString *jsonFileNameString  = [NSString stringWithUTF8String:argv[2]];


NSError *error = NULL;


NSData *plistFileData = [NSData dataWithContentsOfFile:plistFileNameString options:0UL error:&error];
if(plistFileData == NULL) {
NSLog(@"Unable to read plist file.  Error: %@, info: %@", error, [error userInfo]);
exit(1);
}


id plist = [NSPropertyListSerialization propertyListWithData:plistFileData options:NSPropertyListImmutable format:NULL error:&error];
if(plist == NULL) {
NSLog(@"Unable to deserialize property list.  Error: %@, info: %@", error, [error userInfo]);
exit(1);
}


NSData *jsonData = [plist JSONDataWithOptions:JKSerializeOptionPretty error:&error];
if(jsonData == NULL) {
NSLog(@"Unable to serialize plist to JSON.  Error: %@, info: %@", error, [error userInfo]);
exit(1);
}


if([jsonData writeToFile:jsonFileNameString options:NSDataWritingAtomic error:&error] == NO) {
NSLog(@"Unable to write JSON to file.  Error: %@, info: %@", error, [error userInfo]);
exit(1);
}


[pool release]; pool = NULL;
return(0);
}

It does some reasonable error checking, but it's not bullet proof. Use at your own risk.

You'll need JSONKit to build the tool. Place JSONKit.m and JSONKit.h in the same directory as convertPlistToJSON.m, and then compile with:

shell% gcc -o convertPlistToJSON convertPlistToJSON.m JSONKit.m -framework Foundation

Usage:

shell% convertPlistTOJSON
usage: convertPlistToJSON FILE_PLIST FILE_JSON


shell% convertPlistTOJSON input.plist output.json

Reads in input.plist, and writes the pretty printed JSON to output.json.

I wrote a tool in python to do this. See here:

http://sourceforge.net/projects/plist2json

Works from command line on os x or linux distros, batch converts a directory. It's short and simple so it should be easy to modify for your own purposes.

If you are on a Mac you can use the plutil tool on the command line (this comes with the developer tools I believe):

plutil -convert json Data.plist

as mentioned in the comments, this will overwrite the existing data. To output to a new file

plutil -convert json -o Data.json Data.plist

There is a native way, to convert plist's to json. It's called NSJSONSerialization.

Here is an example on how to use it, and convert a plist file to a json file:

NSDictionary *plistDict = [NSDictionary dictionaryWithContentsOfFile:@"input.plist"];


NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:plistDict options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
[jsonString writeToFile:@"output.json" atomically:NO encoding:NSUTF8StringEncoding error:&error];

Using mac utils

Convert plist to json

plutil -convert json -o output.json input.plist

Convert json to plist

plutil -convert xml1 input.json -o output.plist

Converts Filename.plist to Filename.json:

plutil -convert json -r -e json Filename.plist

-convert indicates format, -r makes the output more human-readable, -e specifies an extension

If you run into issues with "invalid object in plist for destination format", you probably have bytes-like data in the plist, which plutil does not consider serializable to json.

Python has built-in plist support, and we can specify a custom default function to specify what to do when serialization fails (e.g. on bytes). If you don't care about the bytes fields, we can just serialize them as '<not serializable>' with the following python one-liner:

python -c 'import plistlib,sys,json; print(json.dumps(plistlib.loads(sys.stdin.read().encode("utf-8")), default=lambda o:"<not serializable>"))'

This takes the stdin, parses the plist, then dumps it to json. For example, to get current power information for your Mac, you can run:

ioreg -rw0 -c AppleSmartBattery -a | python -c 'import plistlib,sys,json; print(json.dumps(plistlib.loads(sys.stdin.read().encode("utf-8")), default=lambda o:"<not serializable>"))'

and if you wanted to just get the current charging wattage, you could pipe that into jq '.[0].AdapterDetails.Watts'