How to use the SimpleCsv framework for CSV file read and write operations

Using the SimpleCsv framework for reading and writing CSV files is a simple and efficient method. Simplecsv is a lightweight Java library that can be used to process CSV files. It provides a set of easy-to-use APIs that enable you to easily read and write CSV files. The following is an example that demonstrates how to use the SimpleCsv framework to read and write CSV files. Read CSV file: Firstly, we need to add the dependencies of the Simplecsv framework in the Java project. You can add the following content to the configuration file of the project's build tool (such as Gradle or Maven): Gradle: groovy implementation 'com.simplecsv:simplecsv:3.1.0' Maven: <dependency> <groupId>com.simplecsv</groupId> <artifactId>simplecsv</artifactId> <version>3.1.0</version> </dependency> Next, we need to create a CSV Reader object and specify the path to the CSV file. Then, the 'readAll()' method of the object can be used to read the entire CSV file as a data structure of type List<List<String>. Each internal List<String>represents a row of data, where each String represents the value of a CSV cell. The following is an example code: import java.io.FileReader; import com.simplecsv.CSVReader; public class CSVReadExample { public static void main(String[] args) { try { //Create a CSV Reader object and specify the path to the CSV file CSVReader csvReader = new CSVReader(new FileReader("path/to/csv/file.csv")); //Use the readAll() method to read the entire CSV file and return a data structure of type List<List<String>> List<List<String>> csvData = csvReader.readAll(); //Traverse the csvData list and output the CSV file content line by line for (List<String> row : csvData) { for (String cell : row) { System.out.print(cell + "\t"); } System.out.println(); } //Close the CSV Reader object csvReader.close(); } catch (IOException e) { e.printStackTrace(); } } } In the above code, we first created a CSV Reader object and specified the path to the CSV file. Then, use the 'readAll()' method to read the entire CSV file as a List<List<String>>type data structure. Next, we traverse the data structure and output the content of the CSV file line by line. Finally, remember to close the CSV Reader object. Write CSV file: Similar to reading CSV files, we first need to create a CSV Writer object and specify the path to the CSV file. Then, using the 'writeNext()' method, we can write a String array or List<String>object to one line of the CSV file. The following is an example code: import java.io.FileWriter; import com.simplecsv.CSVWriter; public class CSVWriteExample { public static void main(String[] args) { try { //Create a CSV Writer object and specify the path to the CSV file CSVWriter csvWriter = new CSVWriter(new FileWriter("path/to/csv/file.csv")); //Construct a row of data String[] row1 = { "John", "Doe", "john.doe@example.com" }; String[] row2 = { "Jane", "Smith", "jane.smith@example.com" }; //Using the writeNext() method to write data to a CSV file csvWriter.writeNext(row1); csvWriter.writeNext(row2); //Close CSV Writer object csvWriter.close(); } catch (IOException e) { e.printStackTrace(); } } } In the above code, we created a CSV Writer object and specified the path to the CSV file. Next, we constructed two rows of data, representing two rows in the CSV file. Then, use the 'writeNext()' method to write this data to a CSV file. Finally, remember to close the CSV Writer object. It is very simple to read and write CSV files using the SimpleCsv framework. You just need to import the SimpleCsv library, create a CSV Reader or CSV Writer object, and use the corresponding methods to read or write CSV files. I hope this article can help you quickly get started with using the SimpleCSV framework.