Analysis
Analysis
Overview:
CSVEED is a lightweight Java class library, which provides a simple method to analyze and read the CSV (comma segmental value) file.This article will introduce the technical principles of the CSVEED framework and provide some Java -based code examples.
introduction:
CSV is a format widely used in data exchange, especially in electronic tables and database applications.However, using Java to resolve CSV files require tedious encoding and processing.The CSVEED framework is simplified by simplifying this process and provided more features to simplify the analysis of CSV files.
Technical principle of CSVEED framework:
1. Note drive: CSVEED uses Java annotations to define the structure and mapping relationship of the CSV file.Users can implement the mapping of the CSV column through annotations, as well as type conversion and verification operations.
The following is an example of Java -driven Java -driven:
import com.csvreader.CsvReader;
import com.ebay.csv.annotation.CsvData;
import com.ebay.csv.annotation.CsvField;
@CsvData(separator = ",", skipLines = 1)
public class Person {
@CsvField(name = "Name")
private String name;
@CsvField(name = "Age")
private int age;
// Getter and Setter methods
}
2. Reflective mechanism: The CSVEED framework uses the Java's reflection mechanism to create objects dynamically according to the definition of the annotation, and map the data in the CSV file to the field of the object.
3. Support customization: The CSVEED framework provides a series of annotations and options that allow users to customize the analytical process.Users can customize separators, number of jumping rows, sorting and ignoring fields.
4. Abnormal processing: The CSVEED framework can handle common CSV file analysis abnormalities, such as data types do not match, field lack, etc., and provide friendly error information.
Example code:
Below is a simple example of using the CSVEED framework to analyze the CSV file:
import com.ebay.csv.CsvReader;
import com.ebay.csv.CsvReaderBuilder;
public class CSVParserExample {
public static void main(String[] args) {
try {
CsvReader<Person> csvReader = new CsvReaderBuilder<Person>(new FileReader("data.csv"))
.clazz(Person.class)
.build();
List<Person> persons = csvReader.readAll();
for (Person person : persons) {
System.out.println(person.getName() + ", " + person.getAge());
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
in conclusion:
The CSVEED framework simplifies the process of Java parsing the CSV file by annotating driver and reflection mechanism.Using CSVEED can make developers more conveniently processing CSV data and provide some additional functions, such as data type conversion and verification.If you need to analyze the Java project of the CSV file, the CSVEED framework is a good choice.
references:
1. "CSVEED" -CSVEED official documentation
2. "Java Reflection" -ORACLE JAVA document
