The technical principle analysis of the Commons CSV (SANDBOX) framework in the Java class library

The Commons CSV (Sandbox) framework is a Java class library for processing CSV (comma segments) files.This article will analyze the technical principles of the framework and provide the corresponding Java code example. CSV is a commonly used text format for storing table data.It uses a comma as a field separator, each line of data represents a record, and the field represents different columns.Commons CSV (Sandbox) is an open source project of the Apache Foundation for reading, writing and operating CSV files. The main technical principles of this framework include the following aspects: 1. Reading of CSV files: Commons CSV (SANDBOX) provides a CSVPARSER class to resolve CSV files into a series of records.You can set different options to define analysis behaviors, such as field separators, text reference symbols, etc.The following is a sample code. Demonstrate how to use the framework to read the CSV file: Reader reader = new FileReader("data.csv"); CSVParser parser = new CSVParser(reader, CSVFormat.DEFAULT); for (CSVRecord record : parser) { String column1 = record.get(0); String column2 = record.get(1); // Process each line of data } parser.close(); 2. Writing of CSV files: Commons CSV (SANDBOX) also provides a CSVPrinter class to write data into CSV files.You can set different options to write writing behaviors, such as field separators, text reference symbols, etc.The following is a sample code. Demonstrate how to use the framework to write to the CSV file: Writer writer = new FileWriter("data.csv"); CSVPrinter printer = new CSVPrinter(writer, CSVFormat.DEFAULT); printer.printRecord("Value 1", "Value 2"); printer.printRecord("Value 3", "Value 4"); printer.close(); 3. Other operations: Commons CSV (Sandbox) also provides other operations, such as modifying existing CSV files, deleting specified records, etc.You can use the provided API for various processing and conversion of CSV files. In summary, the Commons CSV (Sandbox) framework makes it simple and efficient by providing the read, writing and operating functions of CSV files to process CSV format.Developers can easily read, write, and operate CSV files with this framework to quickly process and analyze a large amount of table data. It is hoped that this article will understand the technical principles of the Commons CSV (Sandbox) framework, and help readers better understand and apply the framework through the Java code examples provided.