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reading a json file in java can be done using various libraries, but one of the most popular and easy-to-use libraries is **jackson**. jackson provides a simple way to parse json data and convert it into java objects (pojos). below is a step-by-step tutorial on how to read a json file in java using jackson.

step 1: set up your development environment

1. **install java development kit (jdk)**: ensure you have jdk installed on your machine. you can download it from the [oracle website](https://www.oracle.com/java/technolog...) or use an open-source version like openjdk.

2. **create a java project**: you can use any ide (like intellij idea, eclipse, or netbeans) or simply create a directory for your project.

3. **add jackson library**: you need to add the jackson library to your project. if you are using maven, you can add the following dependencies to your `pom.xml` file:



if you are not using maven, you can download the jackson jar files from the [maven repository](https://mvnrepository.com/artifact/co...) and add them to your project's classpath.

step 2: create a json file

create a file named `data.json` in your project directory with the following content:



step 3: create java classes

you need to create java classes that match the structure of your json data. for the above json, you can create two classes: `employee` and `employeedata`.



step 4: read json file

now, you can read the json file using jackson's `objectmapper`. here’s how you can do it:



step 5: run the program

compile and run the `jsonreaderexample` class. if everything is set up correctly, it should read the json file and print the employee details to the console.

summary

in this tutorial, we covered:

1. setting up a java project with the jackson library.
2. creating a json file.
3. defining java classes to match the json structure.
4. reading the json file and deserializing it into java ...

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