Compare two json objects java

Compare two json objects java

Checking if two JavaScript objects are equal to see if you need to update the UI is a common task in React. Since both user1 and user2 ultimately refer to the same object all our comparisons return true. As a result shallowEqual thinks the two objects are equal in the second example but not in the third. Another way to compare two objects is to convert them to JSON and check if the resulting strings are equal:.

Like deepEqual this method cares about the contents of the object, rather than referential equality. I created a performance comparison between jsonEqual and deepEqual.

What a surprise! The reason I was using deepEqual was that I thought jsonEqual would be an order of magnitude slower. A big problem with jsonEqual is that it can report false negatives. Another difference between the two methods is that JSON. Checking for equality with JSON. Comparing the performance of JSON. This was the result: What a surprise!

compare two json objects java

Differences in behavior between the two methods A big problem with jsonEqual is that it can report false negatives. I'm building a website monitoring tool called DebugBear. Want to give it a try?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. Do any of the major JSON libraries support this? The org. Having said that, I'm currently a big fan of Jackson which my quick read of their ObjectNode. You have to use the static method JsonParser.

If you are already using JUnit, the latest version now employs Hamcrest. It is a generic matching framework especially useful for unit testing that can be extended to build new matchers.

How to compare two JavaScript array objects using jQuery/JavaScript ?

There is a small open source library called hamcrest-json with JSON-aware matches. It is well documented, tested, and supported. Below are some useful links:. Finally, if you are not using JUnit, you can use Hamcrest directly for assertions. I wrote about it here. You can try JsonUnit. It can compare two JSON objects and report differences. It's built on top of Jackson. One thing I did and it works wonders is to read both objects into HashMap and then compare with a regular assertEquals.

It will call the equals method of the hashmaps, which will recursively compare all objects inside they will be either other hashmaps or some single value object like a string or integer. For org. I didn't work with complex JSON objects in that project, so I don't know whether this works in all scenarios. Also, given that I use this in unit tests, I didn't put effort into optimizations. Here it is:. To make sure that it works regradless of the order of the children, all you need to do is replace the inner map with a TreeMapor use something like Collections.

Its very easy to use. Please visit its description page for its usage. Karate is exactly what you are looking for. Here is an example:. For those like me wanting to do this with Jackson, you can use json-unit. Learn more. Asked 10 years, 1 month ago. Active 2 months ago. Viewed k times.

compare two json objects java

Jeff Jeff 4, 3 3 gold badges 28 28 silver badges 34 34 bronze badges.One quick way to compare if 2 objects have the same key value, is using JSON. Well that depends. For JSON. So if the key-value pair are ordered differently in the two objects but are the same, it will return false. Whereas it doesn't matter in Lodash isEqualit will return true as along as the key-value pair exists. Here's my recommendation. But for a more robust solution that cover more of those odd edge cases, use the Lodash way.

This is a solution suggested by mustafauzun0. The idea behind this is similar to the stringify way. It coverts the object into a string and compare if the strings are a match. Essentially it's comparing the equality of two strings.

That's why the order matters. Thanks: mustafauzun0. Thanks: coleturner. Because lodash will quit soon as it reaches the first difference, but stringify goes right till the end unnecessarily. Thanks: blnkdotspace. Download HD Image. Spot an error? Edit this post. Related Tidbits. Refactoring Conditional Adding Property to Object.

How to Compare Two Objects with the equals Method in Java

Fresh Tidbits. HTML audio tag. JavaScript Array.Do any of the major JSON libraries support this? The org. Karate is exactly what you are looking for. Here is an example:. Having said that, I'm currently a big fan of Jackson which my quick read of their ObjectNode. For org. I didn't work with complex JSON objects in that project, so I don't know whether this works in all scenarios. Also, given that I use this in unit tests, I didn't put effort into optimizations.

Here it is:. If you are already using JUnit, the latest version now employs Hamcrest. It is a generic matching framework especially useful for unit testing that can be extended to build new matchers. There is a small open source library called hamcrest-json with JSON-aware matches. It is well documented, tested, and supported. Below are some useful links:.

Finally, if you are not using JUnit, you can use Hamcrest directly for assertions.

Compare two JSON objects in Java

I wrote about it here. One thing I did and it works wonders is to read both objects into HashMap and then compare with a regular assertEquals.

It will call the equals method of the hashmaps, which will recursively compare all objects inside they will be either other hashmaps or some single value object like a string or integer. You can try JsonUnit. It can compare two JSON objects and report differences. It's built on top of Jackson. Its very easy to use. Please visit its description page for its usage. I'm using this, and works fine for me with org.

JSONArray; import org. JSONException; import org.

compare two json objects java

JSONObject; import java. HashMap; import java. HashSet; import java. Iterator; import java. Map; import java.This example shows how to find a diff between two objects of the Employee class. Every employee has his own identity, so the Employee class is mapped as Entity. Our employee has some basic properties, collections, and references.

Just the usual stuff. The case We have two objects, frodoOld and frodoNew. These objects represent two versions of the same being a person called Frodo. Address is mapped as Value Object by default. JaVers matches only objects with the same GlobalId. Without the TypeName annotation, it would be 'org. The resulting Diff is a container for the list of Changes. You can print the list of Changes using pretty toString :.

JaVers can compare arbitrary complex structures of objects. In this example, we show how you can deeply compare employee hierarchies to detect specific types of changes. For simplicity of this example, the data model is reduced to the one class — Employee the same as in the previous example.

Conceptually, an employee hierarchy is a tree. Technically, we have a graph with cycles here since the relationship between boss and employees is bidirectional. The case We are comparing two versions historical states of the employee hierarchy in order to detect the four types of changes:. Configuration JaVers needs to know that Employee class is an Entity.

There are no limitations on the number of nodes in the graph. This example shows how to find a diff between two objects of the Address class. The case We have two objects, address1 and address2. These objects represent two different addresses. To find out what the difference is, just call:. As we said in the previous example, JaVers compares only objects with the same GlobalId. JaVers can compare arbitrary complex structures of objects, including collections passed as top-level handles.

If you want to compare top-level collections with Primitives or Values see domain-model-mappingyou can use the standard javers. Collection items will be compared using equalsresulting in a flat list of Changes.

But when you need to compare top-level collections with complex items, like Entities or Value Objects, use javers. JaVers uses Reflection and captures Person as the item type in the subordinates collection. Luckily, compareCollections comes to the rescue and gives you exactly the same diff result for top-level collections as if they were object properties.

In JaVers we love the Groovy language. From the very beginning of the JaVers project, we used the Spock framework for writing tests. Looking from the other side, modern Java frameworks should be Groovy friendly. As you know, all Java classes extend the Object class. Good news, JaVers is fully compatible with Groovy! You can compare and commit Groovy objects in the same way as plain Java objects. No special JaVers configuration is required for Groovy. Since Groovy generates getters and setters on the fly, you can also use the BEAN mapping style without adding boilerplate code to domain classes.

In this example, we show how to use Custom Value comparators to play with BigDecimals equality.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.

If in that you first perform typechecking, and then call your implemented equals class you should have more luck. As they are not the same object your result will fail. Answering the question in title: in order to compare fields of 2 objects use Unitils and its assertReflectionEquals.

Learn more. Ask Question. Asked 6 years, 1 month ago. Active 1 year, 8 months ago. Viewed 23k times. What could be the reason?

AND my Sales Channel class is: package com. List; import com. Amir Amir 1 1 gold badge 9 9 silver badges 32 32 bronze badges. Active Oldest Votes. I edited my answer.

Amir about equals method: in my opinion when you create any new class in java you should generate few things to avoid troubles in the future: getters, setters, default constructor, equals and hashCode. For easier debug you can create also toString.

compare two json objects java

Your equals method is using a specific class and not Object.Comment 0. Thankfully, this attempt turned out satisfactory by comparing two big Java objects in seconds to get the deltas. Alternatively, you can get the package from Maven Central directly. The Java objects refer to common Java types like primitive values or objects, as well as generic Map, Collection, and Arrays.

All these types extend the generic Tuple type and are thus immutable. There is no config needed before calling the static methods. By assuming the JSON texts to be syntax correct, the Parser would work in lenient mode by default to get a bit higher throughput and neglect any errors that bring no ambiguities, as the unit test below:. Notice there are many illegal XXX s would be neglected when people can still "guess" out the intended content. When there is syntax errors found when parsing in either lenient or strict mode, the problematic text would be highlighted for further correction:.

By default, it enables the following conversions in order:. Unless there is any syntax error encountered and then the Parser needs to revisit the start of the text causing the error, the processing of JSON text would hardly revisit the previous content before the last control, and even the control chars identified earlier would be consumed without evaluating for the second time.

When running the unit test below from my 4-cores iHQ 2. The screenshot below shows the average and max time to parse the 6. It is not so ideal when parsing huge JSON file. The logging shows it might take seconds to process 1 Megabyte payload intermittently that might happen because of Java Garbage collections.

It turned out to be more difficult than implementing the parsing. Actually, it is not always difficult, the combinations of IJSONValue s to be compared can be classified as the following scenarios:. However, I believe it is also quite using when considering them as two Sets, or two Lists created from identical sets of elements when one of them get one or several elements in the middle removed. The Tuple classes defined in functionExtensions are extended to summarize its contents as a set of Integers.

The following test would load the 6M JSON file, change of its leaf nodes, then compare their differences for 10 times:. I hope this can help you to solve some real problems associated with JSON, and even data analysis. See the original article here. Over a million developers have joined DZone. Let's be friends:. DZone 's Guide to. Free Resource. Like 3. Join the DZone community and get the full member experience. Join For Free. Getting Started Add the following dependency to your pom.

The above methods have multiple variations to accept optional arguments. Only the above control chars would be fed into a state-machine to harvest the parsed results recursively with only the previous control char considered. M Measurement. If the positions of their elements doesn't matter, then binding their elements to get the least difference sets before further comparing.


thoughts on “Compare two json objects java

Leave a Reply

Your email address will not be published. Required fields are marked *