Json and Java. From String to JSONObject: issues

Question

I'm using the library org.json.

I have a string like this (quotes can't appear in field_n)

{field1=value1, field2=value2}  (say it `val`)

This string is obtained from an Hashtable<String, Object>.

I create a JSONObject from that string, obtaining:

{"field1":"value1", "field2":"value2"}

The issue arises when in the value value_n quotes (or newlines and carriage return) appear.

I've tried to escape the string in this way:

value = value.replace("\\", "\\\\");
value = value.replace("\"", "\\\"");
value = value.replace("\r", "\\r");
value = value.replace("\n", "\\n");

but I always obtain the org.json.JSONException: Expected a ',' or '}' at ... [character ... line 1] when I try to create the JSONObject with:

JSONObject json = new JSONObject(val);

BobTheBuilder · Accepted Answer · 2013-02-25 15:55:46Z

0

In order to create JSON from map, use:

new JSONObject(myMap);

Another related issue:

quotedStr = JSONObject.quote(val.trim());

will qoute all needed values as it says:

Produce a string in double quotes with backslash sequences in all the right places

edited Feb 25, 2013 at 15:55

answered Feb 25, 2013 at 13:58

BobTheBuilder

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7 Comments

Sefran2 Over a year ago

I obtain the following exception org.json.JSONException: A JSONObject text must begin with '{' at 1 [character 2 line 1].

Perception Over a year ago

@baraky - this will not work. It will just surround the entire JSON string with quotes, not the individual fields and values.

BobTheBuilder Over a year ago

See if it can help: stackoverflow.com/questions/4773663/…

Sefran2 Over a year ago

@baraky: nothing. Exception org.json.JSONException: Expected a ',' or '}' at ... [character ... line 1] is raised. The string is escaped ({field1=dfds \"fdsfs\" fdfsd, field2=dsad\r\nfgfgfd}), but the JSONObject construction fails at the first `\`.

BobTheBuilder Over a year ago

Did you try JSONObject(myMap)?

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