I have a json file as below which I am getting as a response from rest API:
{
"label": " MARA LEYZIN",
"ClassCode": "PROFESSIONAL",
"actvFlg": "A",
"name": "MARA LEYZIN",
"Typ": {
"label": "C_TYP_LU",
"TypCode": "PROFESSIONAL "
},
"Address": {
"link": [],
"firstRecord": 1,
"pageSize": 10,
"searchToken": "multi",
"item": [
{
"label": "Address",
"addrTypFk": {
"label": "C_ADDRESS_TYPE_LU",
"addrTypCd": "INDUSTRY",
"addrTypDesc": "Industry"
}
}
]
}
I am trying to parse this in Java and to remove some unwanted json objects. Like I want the following string to be replaced by blank:
"link": [],
"firstRecord": 1,
"pageSize": 10,
"searchToken": "multi",
"item":
To achieve this I am trying the following approach:
String jsonStr = new String(Files.readAllBytes(Paths.get(inputFile)));
System.out.println(jsonStr);
jsonStr.replaceAll("link", "");
But it is not replacing the required string with blanks. Please help me in this.
string object is immutable , so basically if do you want to replace something
System.out.println(jsonStr.replaceAll("link", "")); this will print the replaced string but it will not affect the original string, however if you do this
jsonStr=jsonStr.replaceAll("link", "");
System.out.println(jsonStr); this will print the replaced string
First of all:
Your JSON is not validate. You're missing a closing curly bracket at the end of it.
{
"label": " MARA LEYZIN",
"ClassCode": "PROFESSIONAL",
"actvFlg": "A",
"name": "MARA LEYZIN",
"Typ": {
"label": "C_TYP_LU",
"TypCode": "PROFESSIONAL "
},
"Address": {
"link": [],
"firstRecord": 1,
"pageSize": 10,
"searchToken": "multi",
"item": [{
"label": "Address",
"addrTypFk": {
"label": "C_ADDRESS_TYPE_LU",
"addrTypCd": "INDUSTRY",
"addrTypDesc": "Industry"
}
}]
}
}
Second of all you should just change order of your commands to this:
jsonStr.replaceAll("link", "");
System.out.println(jsonStr);
Important addition:
And I would suggest you to use org.json library or even better JACKSON to parse JSON files.
Here's tutorial how to use jackson and it's my warmest suggestion.
You will save a lot of time and you can do whatever you like.
Related
Im trying to get JSONPath expression to filter my JSON and get whole sport object using value of child array.
I have following JSON:
[{
"name": "Soccer",
"regions": [{
"name": "Australia",
"leagues": [{
"name": "Australia league",
"inplay": 5,
}
]
}
]
}, {
"name": "Tennis",
"regions": [{
"name": "Germany",
"leagues": [{
"name": "Germany league",
"inplay": 0,
}
]
}
]
}
]
I need to get whole sport object where "inplay == 0" using JsonPath expression.
Result should look like that:
{
"name": "Tennis",
"regions": [{
"name": "Germany",
"leagues": [{
"name": "Germany league",
"inplay": 0,
}
]
}
]
}
Regions and Leagues count can be > 1
Therefore $[?(#.regions[0].leagues[0].inplay == 0)] is not suitable
Tried $[?(#.regions[*].leagues[*].inplay == 0)] but it doesnt work
This works for me
$[?(#.regions[0].leagues[0].inplay == 0)]
Since this is not directly supported (as of now) in JayWay JSONPath we leverage contains as a workaround:
$[?(#.regions..inplay contains '0')]
Note: It may look like contains would work similar to a 'like' operator or instr function but this is not the case here. If the inplay value contains a 0, e.g. 10 it would not pull the record (according to my tests;)
i have problem with get specified value from json. I need get Key value from json below, its start with array/list.
[
{
"Version": 1,
"Key": "353333_PC",
"Type": "PostalCode",
"Rank": 500,
"LocalizedName": "Suwalki",
"EnglishName": "Suwalki",
"PrimaryPostalCode": "16-400",
"Region": {
"ID": "EUR",
"LocalizedName": "Europe",
"EnglishName": "Europe"
},
"Country": {
"ID": "PL",
"LocalizedName": "Poland",
"EnglishName": "Poland"
}
}
]
I have tried code like this:
String content = parent.path("Key").asText();
return content;
but it returns empty string. Have u any idea how get this?
I'm having some trouble with GSON in regards to printing. GSON has two options when it comes to printing.
Pretty Printing
Compact Printing
I intend to use a modified form of Pretty Printing and even though the documentation says JsonPrintFormatter is the class which is used to modify the output format. I can't find that class in the GSON repository!
Any ideas on why this is the case or anyway I can modify the GSON printing?
Apart from that, any libraries used to modify spacing or formatting of JSON in the Java language would also be helpful.
Pretty Print:
{
"classname": "something",
"type": "object",
"version": 1,
"properties": [
{
"propertyname": "something1",
"type": "String",
"length": 255
},
{
"propertyname": "something2",
"type": "Date",
"length": 10
}
]
}
Compact Print:
{"classname":"something","type":"object","version":1,"properties":[{"propertyname":"something1","type":"String","length":255},{"propertyname":"something2","type":"Date","length":10}]}
My Print Style:
{
"classname": "something",
"type": "object",
"version": 1,
"properties": [
{"propertyname": "something1","type": "String","length": 255},
{"propertyname": "something2","type": "Date","length": 10}
]
}
Well, it's just work in progress for now, but this should do the trick for strings with only one array. Will look into to making it more stable and able to handle more complex structures.
private static String reformat(String og){
String reformattable = og;
String[] parts = reformattable.split("\\[",2);
String arrayPart = parts[1];
String arrayOnly = arrayPart.split("]",2)[0];
reformattable = arrayOnly.replaceAll("\\{\n","{");
reformattable = reformattable.replaceAll("\",\n", "\\\",");
reformattable = reformattable.replaceAll(" +"," ");
reformattable = reformattable.replaceAll("\\{ "," {");
reformattable = reformattable.replaceAll("\n }","}");
return og.replace(arrayOnly,reformattable);
}
Result should look like this (at least for my simple class):
{
"classname": "test",
"properties": [
{"propertyname": "1", "length": 1},
{"propertyname": "1", "length": 1}
]
}
I have a JSON file that has multiple entries inside of an array. Each of those entries needs to be mapped to a java object. Here is the JSON string I am testing with (http://jsonlint.com/ validated the JSON below, but I had to erase all of the escape characters which I use in the actual Java test),
[{
"LocId":99,
"typeId":99,
"name":"foo",
"parentId":99,
"geoCode":
{
"type":"foo",
"coordinates":
[{
"latitude":99.0,
"longitude":99.0
}]
}
,
"LocId":8,
"typeId":99,
"name":"foo",
"parentId":99,
"geoCode":
{
"type":"foo",
"coordinates":
[{
"latitude":99.0,
"longitude":99.0
}]
}
}]
I read this string in like this,
String str = "The JSON string shown above";
InputStream is = new ByteArrayInputStream(str.getBytes());
BufferedReader br = new BufferedReader(new InputStreamReader(is));
LocIdClass[] locations = new Gson().fromJson(br, LocIdClass[].class);
But the size of my locations array is always one and only the last entry in the JSON string is stored.
for(int i=0; i<locations.length; i++)
System.out.println(locations[i]);
System.out.println("The size of the array is " + locations.length);
I'm not sure why only the last entry in the JSON string would be retrieved but the others are skipped. I referred to this SO post to figure out the POJO array Jackson - Json to POJO With Multiple Entries.
you have an error in your current json payload, try this:
[
{
"LocId": 99,
"typeId": 99,
"name": "foo",
"parentId": 99,
"geoCode": {
"type": "foo",
"coordinates": [
{
"latitude": 99,
"longitude": 99
}
]
}
},
{
"LocId": 8,
"typeId": 99,
"name": "foo",
"parentId": 99,
"geoCode": {
"type": "foo",
"coordinates": [
{
"latitude": 99,
"longitude": 99
}
]
}
}
]
Edit: To avoid this issue in the future, you can use jsonlint.com to check your json. Make sure it is what you expect it to be.
``I am having an Json Array as response like:
[
{
"status": "Active",
"entityName": "fghgfhfghfgh",
"entityCode": 14,
"children": [],
"attributes": [
{
"attributeValue": "500 michigan ave"
}
],
"deviceList": [],
"entityId": "64eab9299eed9455b3683da074cf175c",
"customerId": 2006546,
"type": "7dad308f82b41e02fe8959c05b631bd7"
}
,
{
"status": "Active",
"entityName": "ghghhguyutgh6re58rrt",
"entityCode": 13,
"children": [],
"attributes": [
{
"attributeValue": "500 michigan ave"
}
],
"deviceList": [],
"entityId": "912eff0613fa140c100af435c033e195",
"customerId": 2006546,
"type": "7dad308f82b41e02fe8959c05b631bd7"
}
]
I want to split this json into two like
{
"status": "Active",
"entityName": "fghgfhfghfgh",
"entityCode": 14,
"children": [],
"attributes": [
{
"attributeValue": "500 michigan ave"
}
],
"deviceList": [],
"entityId": "64eab9299eed9455b3683da074cf175c",
"customerId": 2006546,
"type": "7dad308f82b41e02fe8959c05b631bd7" }
and the other one.I am using GSON and simplejson,when I try to remove the delimiters([ and ])the json comes as malformed one.Is there any better otpion to split the json array to two or more json strings as per the json response coming.
Is there any reason you can't parse the entire array, and then iterate over/process each element individually?
Just removing the brackets does make the JSON invalid, and splitting at the comma is going to be unreliable. The parser exists to figure out where to split the array and turn each element into an object for you.
Assuming you have some data structure defined to hold a single element once you've broken the array down, you should be able to parse the array into a list of those and step through them (or pick one out) as needed.
After that point, you can do whatever you want with the data (including formatting it back into JSON). I would definitely recommend using a proper parser to break the array down, though; it will be a lot simpler and more reliable, and should work unless you have serious performance concerns.