zerocell integration for Spring Boot. It enables you to upload and extract data quickly, efficiently and automagically from Excel files in your Spring application controllers. It's so magical that you won't see or write any code to read and map data from an Excel Sheet to a POJO.
NOTE: This should not be considered production-ready. We are working towards a stable release towards early February 2022. YMMV
The code below is a complete Spring Boot application that allows users to
- upload an Excel file,
- process the Excel file by reading each row and mapping it to a POJO
- return the extracted Excel data as JSON data
All without writing any code to actually deal with Excel!
public class PersonRow {
@Column(index=0, name= "ID")
private String ID;
@Column(index=1, name= "Name")
private String name;
@Column(index=2, name="Age")
private int age;
// .. getters and setters ...
}
@RestController
@Import(SpringZerocellSupport.class)
public class ExampleController {
@PostMapping(value = "/upload", produces = MediaType.APPLICATION_JSON_VALUE)
public List<PersonRow> extractUsers(@ZerocellRequestBody List<PersonRow> peopleFromExcel) {
return peopleFromExcel; // Return the loaded data to the user
}
}
@SpringBootApplication
public class ExampleApplication {
public static void main(String... args) {
SpringApplication.run(ExampleApplication.class, args);
}
}A simple form to interact with the endpoint would looks something like this;
<!doctype html>
<html>
<body>
<h1>Spring Zerocell Example</h1>
<form method="post" action="/upload" enctype="multipart/form-data">
Upload an excel with the following columns 'ID', 'Name', 'Age'
<input type="file" name="file" >
<button>Upload</button>
</form>
</body>
</html>A cURL request to the endpoint would look something like this:
$ curl -XPOST -F "file=@customers.xlsx" http://localhost:8080/uploadNot yet on any repositories, so clone it and install it locally:
$ git clone https://github.com/nndi-oss/spring-zerocell.git
$ cd spring-zerocell
$ mvn clean installAdd to your pom and enjoy :) :
<dependency>
<groupId>cloud.nndi.oss</groupId>
<artifactId>spring-zerocell</artifactId>
<version>0.3.0-SNAPSHOT</version>
</dependency>Copyright (c) 2022, NNDI