Use the Commons IO library to analyze and generate XML data
Use the Commons IO library to analyze and generate XML data
XML (scalable markings) is a common format for storing and transmission data.Commons IO library is an open source project of Apache, which provides a set of tools for processing input and output operations.In Java, the Commons IO library provides some simple and easy -to -use methods, which can be used to analyze and generate XML data.This article will introduce how to use the Commons IO library to analyze and generate XML data.
1. Analyze XML data
The use of the Commons IO library to analyze XML data is very simple.First of all, we need to introduce the relevant dependencies of the Commons IO library:
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.11.0</version>
</dependency>
Next, we use the constructor of the `ReadFiletring` method of the` Fileutils` class to read the XML file content, and pass it as a strings to the constructor of the `xmlconfiguration` class:
import org.apache.commons.configuration2.XMLConfiguration;
import org.apache.commons.io.FileUtils;
public class XMLParser {
public static void main(String[] args) {
try {
String xmlString = FileUtils.readFileToString(new File("data.xml"), "UTF-8");
XMLConfiguration config = new XMLConfiguration();
config.load(new ByteArrayInputStream(xmlString.getBytes("UTF-8")));
// Analyze XML data
String value = config.getString("element1.element2");
System.out.println("Value: " + value);
} catch (Exception e) {
e.printStackTrace();
}
}
}
In the above code, we read a XML file called "Data.xml" and loaded the file content with the `xmlconfiguration` class.Then, we can use the method of `xmlconfiguration` to access data in XML, such as getting the value of the specified element.
2. Generate XML data
The use of the COMMONS IO library to generate XML data is also very simple.We can use the `xmlconfiguration` class to create an empty XML configuration object, and use its method to add elements and attributes.
import org.apache.commons.configuration2.XMLConfiguration;
import org.apache.commons.io.FileUtils;
public class XMLGenerator {
public static void main(String[] args) {
try {
XMLConfiguration config = new XMLConfiguration();
// Add root elements
config.addProperty("root", "");
// Add sub -elements and attributes
config.addProperty("root.element1[@attr]", "value1");
config.addProperty("root.element2", "value2");
// Save as XML file
FileUtils.writeStringToFile(new File("output.xml"), config.toString(), "UTF-8");
} catch (Exception e) {
e.printStackTrace();
}
}
}
In the above code, we created an empty `xmlconfiguration` object, and use the` addproperty` method to add root elements, sub -elements and attributes.Finally, we write the generated XML string into the file with the `` WRITESTRINGTRINGTRINGTRINGTRINGTRINGTOFILE "method of the` Fileutils` class.
The above is the example code that uses the Commons IO library to analyze and generate XML data.The Commons IO library provides many other methods to process XML data, such as modifying elements and attributes, deleting elements, etc.You can use these methods to use these methods to operate XML data.
