How to Validate a CSV File using Java

CSV files are one of the more commonly used formats for importing and exporting data from a database, which makes them highly vulnerable data type. Only valid files should ever make it into a database, as invalid files in storage will cause a major headache when eventually trying to access that data. Even worse, an invalid CSV file could be used to mask a malicious threat and penetrate your system. With the Cloudmersive CSV Validation API, you can easily include a data validation layer as a cloud service in your application and get instant information about invalid CSV files including an error count, warning count, and a description of both. Further, you can find out if a given CSV file is password protected. Below, I’ll walk you through incorporating this API as a cloud service using ready-to-run code snippets in Java to structure your API call.

Let’s begin by installing the Java SDK with Maven. First, include the following reference in the pom.xml repository:

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

Next, let’s include a reference in the dependency:

<dependencies>
<dependency>
    <groupId>com.github.Cloudmersive</groupId>
    <artifactId>Cloudmersive.APIClient.Java</artifactId>
    <version>v4.25</version>
</dependency>
</dependencies>

Last, let’s include the import classes at the top of our file and include the validation function:

// Import classes:
//import com.cloudmersive.client.invoker.ApiClient;
//import com.cloudmersive.client.invoker.ApiException;
//import com.cloudmersive.client.invoker.Configuration;
//import com.cloudmersive.client.invoker.auth.*;
//import com.cloudmersive.client.ValidateDocumentApi;
ApiClient defaultClient = Configuration.getDefaultApiClient();
// Configure API key authorization: Apikey
ApiKeyAuth Apikey = (ApiKeyAuth) defaultClient.getAuthentication("Apikey");
Apikey.setApiKey("YOUR API KEY");
// Uncomment the following line to set a prefix for the API key, e.g. "Token" (defaults to null)
//Apikey.setApiKeyPrefix("Token");
ValidateDocumentApi apiInstance = new ValidateDocumentApi();
File inputFile = new File("/path/to/inputfile"); // File | Input file to perform the operation on.
try {
    DocumentValidationResult result = apiInstance.validateDocumentCsvValidation(inputFile);
    System.out.println(result);
} catch (ApiException e) {
    System.err.println("Exception when calling ValidateDocumentApi#validateDocumentCsvValidation");
    e.printStackTrace();
}

You will need your input file & a Cloudmersive API key in order to execute the function. You can get your key by registering a free account on our website.