Use Delimited Core framework to optimize the text analysis and formatting function in the Java class library
Use Delimited Core framework to optimize the text analysis and formatting function in the Java class library
Overview
During the development of Java, the text often needs to be parsed and formatted.However, the method provided directly in the Java library may cause the code to be lengthy, inefficient and difficult to maintain.To solve this problem, we can use the Delimited Core framework to optimize text analysis and formatting functions.Delimited Core is a Java -based open source framework. It provides a set of simple and powerful APIs for processing various texts and file analysis tasks.
Introduce Delimited Core framework
First, we need to introduce the Delimited Core framework into our Java project.You can import library files that depend on management tools such as Maven or Gradle.The example code is as follows:
Maven：
<dependency>
<groupId>io.github.delimitedfile</groupId>
<artifactId>delimited-file-core</artifactId>
<version>1.0.0</version>
</dependency>
Gradle：
groovy
implementation 'io.github.delimitedfile:delimited-file-core:1.0.0'
Text analysis function
Use the Delimited Core framework to easily analyze various types of text files, such as CSV, TSV, fixed -length text, etc.The following is an example. Demonstration uses Delimited Core to analyze the data in the CSV file:
import io.github.delimitedfile.DelimitedFileReader;
public class CsvParser {
public static void main(String[] args) {
try (DelimitedFileReader reader = new DelimitedFileReader("data.csv", ',')) {
String[] header = reader.readHeader();
while (reader.next()) {
String[] record = reader.readRecord();
// Treatment the readings read
System.out.println(record);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
In the above examples, we first created a DelimitedFileRereader object, which accepts two parameters: the file path and field separation of the file to be parsed.Then, we read the header of the CSV file with the `Readheader` method, and use the` ReadRecord` method to read the records one by one.By processing each record, we can perform further logical operations.
Text formatting function
In addition to text analysis, Delimited Core also provides a powerful text formatting function.You can use Delimited Core to generate various types of text files, such as CSV, TSV, fixed -length text, etc.The following is an example. Demonstration of how to use Delimited Core to format the data and write it into the CSV file:
import io.github.delimitedfile.DelimitedFileWriter;
public class CsvFormatter {
public static void main(String[] args) {
try (DelimitedFileWriter writer = new DelimitedFileWriter("output.csv", ',')) {
// Set the column header of the CSV file
writer.writeHeader("Name", "Age", "Country");
// Write each line record
writer.writeRecord("John Doe", 30, "USA");
writer.writeRecord("Jane Smith", 25, "Canada");
} catch (Exception e) {
e.printStackTrace();
}
}
}
In the above example, we first created a DelimitedFilewriter object, which accepts two parameters: the file path and field separation of the file to be written.Then, we use the `writeheader` method to set the column header of the CSV file, and use the` writrecord` method to write records one by one.In this way, we can easily generate CSV files and write data into it.
Summarize
Using the Delimited Core framework can significantly optimize the text analysis and formatting function in the Java class library.The framework provides a simple and powerful API, which can easily handle various types of text files.By introducing Delimited Core, we can improve the simplicity, readability and performance of the code, and better maintain and expand our text analysis and formatting functions.
