Java uses Apache Commons Codec to implement URL encoding/decoding, converting special characters into URL safe formats
The Maven coordinates of the dependent class library are:
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.15</version>
</dependency>
Apache Commons Codec is a Java library for encoding and decoding, providing implementations of various common encoding algorithms, including URL encoding. Its goal is to provide a set of easy-to-use tools that developers can easily perform encoding and decoding operations without worrying about the specific implementation details of the algorithm.
The following is a complete example of using Apache Commons Codec to implement URL encoding/decoding:
import org.apache.commons.codec.CharEncoding;
import org.apache.commons.codec.net.URLCodec;
import java.io.UnsupportedEncodingException;
public class UrlEncoderDecoderExample {
public static void main(String[] args) throws UnsupportedEncodingException {
String input = "This is a sample input with special characters: !@#$%^&*()";
//URL encoding
URLCodec urlCodec = new URLCodec(CharEncoding.UTF_8);
String encodedUrl = urlCodec.encode(input);
System.out.println("Encoded URL: " + encodedUrl);
//URL decoding
String decodedUrl = urlCodec.decode(encodedUrl);
System.out.println("Decoded URL: " + decodedUrl);
}
}
In the above code, we first created a 'URLCodec' object and specified the use of UTF-8 Character encoding. Then, use the 'encode' method to encode the input string and print the encoded URL string. Next, use the 'decode' method to decode the encoded URL string and print the decoded string.
Finally, summarize the steps for implementing URL encoding/decoding using Apache Commons Codec:
1. Import Apache Commons Codec Maven dependencies.
2. Create a 'URLCodec' object and specify the Character encoding.
3. Use the 'encode' method to encode the URL of the string to be encoded.
4. Use the 'decode' method to decode the encoded URL string.
