1. Use java.net.URLEncoder and java.net.URLDecoder classes
public class UrlEncoder {
public static void main(String[] args) {
try {
String url = "https://www.baidu.com/sugrec?&prod=pc_his&from=pc_web&_t=1680167620430&req=2&csor=0";
String encodedUrl = java.net.URLEncoder.encode(url, "UTF-8");
System.out.println("加密后：" + encodedUrl);
String decodedUrl = java.net.URLDecoder.decode(encodedUrl, "UTF-8");
System.out.println("解密后：" + decodedUrl);
/**
* 输出：
* 加密后：https%3A%2F%2Fwww.baidu.com%2Fsugrec%3F%26prod%3Dpc_his%26from%3Dpc_web%26_t%3D1680167620430%26req%3D2%26csor%3D0
* 解密后：https://www.baidu.com/sugrec?&prod=pc_his&from=pc_web&_t=1680167620430&req=2&csor=0
*/
} catch (Exception e) {
e.printStackTrace();
}
}
}
In the above code, use the URLEncoder.encode method to encode the URL, specify the encoding method as UTF-8, and generate the encoded URL string. Use the URLDecoder.decode method to decode the encoded URL string, specify the decoding method as UTF-8, and generate the decoded URL string.
2. Use java.nio.charset.StandardCharsets and java.util.Base64 classes
import java.nio.charset.StandardCharsets;
import java.util.Base64;
public class UrlEncoder {
public static void main(String[] args) {
try {
String url = "https://www.baidu.com/sugrec?&prod=pc_his&from=pc_web&_t=1680167620430&req=2&csor=0";
String encodedUrl = Base64.getEncoder().encodeToString(url.getBytes(StandardCharsets.UTF_8));
System.out.println("加密后：" + encodedUrl);
String decodedUrl = new String(Base64.getDecoder().decode(encodedUrl), StandardCharsets.UTF_8);
System.out.println("解密后：" + decodedUrl);
/**
* 输出：
* 加密后：aHR0cHM6Ly93d3cuYmFpZHUuY29tL3N1Z3JlYz8mcHJvZD1wY19oaXMmZnJvbT1wY193ZWImX3Q9MTY4MDE2NzYyMDQzMCZyZXE9MiZjc29yPTA=
* 解密后：https://www.baidu.com/sugrec?&prod=pc_his&from=pc_web&_t=1680167620430&req=2&csor=0
*/
} catch (Exception e) {
e.printStackTrace();
}
}
}
In the above code, use the Base64.getEncoder().encodeToString method to convert the URL string into a UTF-8 encoded byte array and perform Base64 encoding. Use the new String(Base64.getDecoder().decode(encodedUrl), StandardCharsets.UTF_8) method to decode the encoded URL string to generate a decoded URL string.
It should be noted that a character set needs to be specified when encoding and decoding URLs. Commonly used character sets include UTF-8, ISO-8859-1, and so on. When using URLs for network transmission, it is generally recommended to use UTF-8 encoding.