Parsing json file


Excel is a powerful tool that allows you to connect to JSON data and read it. However sometimes this data might require a little manipulation to be fully understood and analysed in Excel. This article contains data tables to download so you can practice along and master the art of parsing custom JSON data using Excel.

If you are not familiar with Excel Power Tools you can find out about them here. JSON data is a way of representing objects or arrays. It is easy to read, and it is easy to parse, even with Excel. The [ represents an array. This array contains two objects. The objects are defined within the curly brackets and separated with a comma.

Here is one you can look at yourself. Therefore, from the Data Ribbon we can select, Get data from Web. This will open a dialogue box in which you place the URL.

parsing json file

Next, Power query will then open. Power query is a magic excel tool that will allow you transform data that you connect to into a usable format. For excel to read this, we must convert a list to a table.

Next, Power query will create a table and you will see this step appear on the right of the power query window under applied steps. This new table contains a record. We must expand this record to get the value pairs. As this record only has 1 row, we would expect this to expand across the columns. To do this, right click on the arrows in the column header. This will reveal the names of the value pairs.

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By selecting ok a new column will be set up in the table. The name will be in the header and the value in the row. If we wanted this data going down the row, we could Unpivot the columns. By selecting the id column.

Then from the Transform ribbon select the dropdown for unpivot columns and select unpivot other columns. To work with this data, we must now move to from Power Query to Excel. If we select File, and then select Close and load, this will load the data as a table in Excel.

This can happen for many reasons and is often the design of a database. When we encounter data like this, we can easily parse the column into its components. From the image below we see we have 4 components. We have An Array, an Object, the data, and one of the data fields contains an array.

Jackson – How to parse JSON

Download this file. It contains a table as shown below. If your data is not in table format, Excel will then prompt you to create a table. Select the cells the contain the data and tick the box to say that your table has headers. Power Query editor window will open. On the canvas you can see your data and, on the right, you can see any transformation steps that have taken place.Welcome to Gson Example Tutorial.

Gson is the main class that exposes the methods fromJson and toJson for conversion. For default implementation, we can create this object directly or we can use GsonBuilder class that provide useful options for conversion such as pretty printing, field naming convention, excluding fields, date format etc.

Since JSON is a recursive language, we need to call our parsing method recursively for array and nested object. JsonToken is java enum returned by JsonReader next method that we can use with conditional logic or switch case statements for conversion. Avoid using it until unless there is no way to use Object based model.

By default JsonWriter writes json in compact form but we can set indent for pretty printing. Download project from below link and play around with different options Gson provides.

Nice tutorial. But, I have a question : would it be better if we defined Address class as a static inner class in Employee class? In EmployeeGsonExample.

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It has no other value to the program. There is not much benefit of having screenshot of the program output.

parsing json file

It would be more beneficial to provide the project itself, so that you can just import it, run it, modify it and learn more.

I searched for hours and attempted working through gson documentation and finally found this example. This was absolutely the best. Using gson truly is so simple.

Thank you so much. This is really good. Do you have a tutorial similar like this one, with the addition of Hibernate and JTA. Your email address will not be published. I would love to connect with you personally. Table of Contents 1 Gson 1.In my project, the JSON file contained properties information to be used inside the application.

There are many libraries available for reading or parsing JSON data in Java, but in particular we are going to be using the library found on json. To keep things simple in this example, we are only going to print it out. It is now time to create our Java project. Instead we are going to be using a text editor and a command prompt. Our project structure is going to look like the following:. Feel free to change it to your preference.

With this done, open your MainDriver. The readFile String filename function will read a text file and return it as a single string. Using this as a reference, make your readFile String filename function look like the following:. Finally the data we obtain is printed out.

Parse A JSON File With Java

There are many other great JSON functions to make use of, all of which can be found in the Javadocs for the library. To test everything out, just run ant buildandrun from the command line or terminal.

I chose to use this library set because it closely resembles how you would parse JSON in native Android.

Parsing JSON Really Quickly: Lessons Learned

Nic Raboy is an advocate of modern web and mobile development technologies. Nic writes about his development experiences related to making web and mobile development easier to understand. Subscribe to the newsletter for monthly tips and tricks on subjects such as mobile, web, and game development. If you found this developer resource helpful, please consider supporting it through the following options:.

Toggle navigation The Polyglot Developer. About Blog Courses Resources.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I know similar questions have been asked and answered before, but I simply haven't been able to translate those solutions to my own problem disclaimer: I'm not a developer.

I get the first URL that matches my criteria. But how do I create a list of all URLs all I should probably mention that my end goal is to create a program that can loop scrape my list of URLs I'll save that for another post! Hopefully I am understand this right, and roganjosh has a similar idea. You can loop through the specific parts with contain lists of useful things. So, we can do something like:. At least it should get you close. Also just saw another part of your question regarding CSV outputting.

Learn more. Asked 2 years, 6 months ago. Active 2 years, 6 months ago. Viewed 2k times. When I use something simple like this: import json from pprint import pprint with open 'output. Active Oldest Votes. BrandonM BrandonM 3 3 silver badges 12 12 bronze badges.

Thank you very much! This fixes my problem.

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And thank you for the link to CSV outputting. I got it to write my output to a CSV file, but I'm having some trouble getting it to write the URLs in a single column, instead of a single row. Does this have something to do with my output or does the writer have a built in function to transpose the data?

Found a solution. Thanks again for your help! Sorry, didn't see this quick enough.It is an independent data exchange format and is the best alternative for XML. This chapter explains how to parse the JSON file and extract necessary information from it. Android provides four different classes to manipulate JSON data. The first step is to identify the fields in the JSON data in which you are interested in. For example.

In the JSON given below we interested in getting temperature only. An JSON file consist of many components. The last step is to parse the JSON. The method getString returns the string value of the specified key.

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Apart from the these methodsthere are other methods provided by this class for better parsing JSON files. Let's try to run our application we just modified. I assume you had created your AVD while doing environment setup. To run the app from Android studio, open one of your project's activity files and click Run icon from the toolbar.

Above Example showing the data from string json,The data has contained employer details as well as salary information. Previous Page. Next Page. Previous Page Print Page. You will use Android studio to create an Android application. Run the application and choose a running android device and install the application on it and verify the results.Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles.

JSON is one of the most popular formats for transferring text-based data around the web. There are no comments in a JSON file—the contents should be self-explanatory. A colon : separates a key from its value. An array begins with an opening bracket [ and ends with a closing one ]. From these simple definitions, of course, arbitrary complexity can arise. For example, objects can be nested within objects. Objects can contain arrays, and arrays can also contain objects.

parsing json file

All of which can have open-ended levels of nesting. In practice, though, if the layout of JSON data is convoluted, the design of the data layout should probably use a rethink.

In those cases, unfortunately, you just have to deal with it. Most programming languages have libraries or modules that allow them to parse JSON data.

Sadly, the Bash shell has no such functionality. Necessity being the mother of invention, though, the jq utility was born! Because of this, JSON is often transmitted as a simple, long string, without any consideration of layout. Of course, the downside to all this is when a human tries to read it. Now, with a bit of effort, you can read this. The entire object is wrapped in curly braces.

It contains two key:name pairs: message and timestamp. It can also work with JSON stored in a file. This should make it a bit easier to follow. The simplest way to extract data from a JSON file is to provide a key name to obtain its data value. This creates a filter from the key name. We also need to tell jq which JSON file to use. If you have a key name that includes spaces or punctuation, you have to wrap its filter in quotation marks.

Care is usually taken to use characters, numbers, and underscores only so the JSON key names are not problematic. We can use the JSON dot notation.This article shows how to use the System. The directions and sample code use the library directly, not through a framework such as ASP. NET Core. Most of the serialization sample code sets JsonSerializerOptions. WriteIndented to true to "pretty-print" the JSON with indentation and whitespace for human readability. For production use, you would typically accept the default value of false for this setting.

The System. Json namespace contains all the entry points and the main types. Serialization namespace contains attributes and APIs for advanced scenarios and customization specific to serialization and deserialization.

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The code examples shown in this article require using directives for one or both of these namespaces:. Attributes from the System. Serialization namespace aren't currently supported in System. Serialize method.

How to serialize and deserialize (marshal and unmarshal) JSON in .NET

The preceding examples use type inference for the type being serialized. An overload of Serialize takes a generic type parameter:. The JSON output from serializing an instance of the preceding type looks like the following example. The JSON output is minified by default:. The following example shows the same JSON, formatted that is, pretty-printed with whitespace and indentation :. SerializeToUtf8Bytes method:. A Serialize overload that takes a Utf8JsonWriter is also available. You can implement custom converters to handle additional types or to provide functionality that isn't supported by the built-in converters.

To deserialize from a string or a file, call the JsonSerializer. Deserialize method. The following example reads JSON from a string and creates an instance of the WeatherForecast class shown earlier for the serialization example :. To deserialize from a file by using synchronous code, read the file into a string, as shown in the following example:. To deserialize from a file by using asynchronous code, call the DeserializeAsync method:. You can implement custom converters to provide functionality that isn't supported by the built-in converters.

WriteIndented to true :. By default, property names and dictionary keys are unchanged in the JSON output, including case. Enum values are represented as numbers. This section explains how to:. For other scenarios that require special handling of JSON property names and values, you can implement custom converters.

To set the name of individual properties, use the [JsonPropertyName] attribute. CamelCaseas shown in the following example:. Then set the JsonSerializerOptions. PropertyNamingPolicy property to an instance of your naming policy class:.

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