Hutool 26 Review

| Library | JDK Baseline | JSON parsing | File watch | Jakarta EE | GraalVM | Learning Curve | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Hutool 26 | JDK 11+ | Very Fast (State machine) | Excellent (NIO.2) | Yes | Yes | Low | | Apache Commons Lang | JDK 8+ | None | None | No | No | Medium | | Guava | JDK 11+ | None | Limited | No | Yes | Medium | | Java 21 stdlib | JDK 21 | No | Manual | N/A | N/A | High (Verbose) |

Hutool's unique value is its Chinese-first documentation (though English Javadocs are available) and its "batteries-included" philosophy—you get HTTP, JSON, Cache, Cryptography, and POI in one dependency.

| Feature | Hutool 2.6 | Apache Commons Lang 3 | Google Guava 18 | |---------|-------------|------------------------|------------------| | String utilities | Yes | Yes | Yes | | Collection utilities | Yes | Limited | Extensive | | Date/time | Yes (pre-Java 8) | Yes (DateUtils) | Limited | | File I/O | Yes | Yes (Commons IO) | No | | HTTP client | Yes | No | No | | Crypto utilities | Yes | No (separate module) | No | | Dependency size | ~200 KB | ~500 KB (Lang + IO) | ~2 MB | | Learning curve | Low | Medium | Medium-High |

Hutool 2.6 was notably more all-in-one and lighter than combining Apache Commons components. hutool 26

Let’s build a small, realistic example of a log file analyzer using Hutool 2.6.

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.core.date.DateUtil;
import cn.hutool.http.HttpUtil;
import java.util.Date;
import java.util.List;
public class LogAnalyzer 
public static void main(String[] args) 
// Read log lines
List<String> lines = FileUtil.readLines("app.log", "UTF-8"); | Library | JDK Baseline | JSON parsing
    // Find errors
    long errorCount = lines.stream()
        .filter(line -> StrUtil.contains(line, "ERROR"))
        .count();
// Parse timestamp from first line
    if (!lines.isEmpty()) 
        String firstLine = lines.get(0);
        String timestampStr = StrUtil.subBetween(firstLine, "[", "]");
        Date logDate = DateUtil.parse(timestampStr);
System.out.println("Log date: " + DateUtil.formatDateTime(logDate));
System.out.println("Total errors: " + errorCount);
// Send alert if too many errors
    if (errorCount > 100) 
        HttpUtil.post("https://alerts.internal/", "errors=" + errorCount);

No BufferedReader setup, no SimpleDateFormat try-catch, no URLConnection boilerplate. That was the magic of Hutool 2.6. With Hutool (Even on Java 6): Date result = DateUtil

In Java 6, doing something simple like "get the time 3 days from now" requires a disgusting amount of Calendar boilerplate. Vanilla Java 6:

Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
cal.add(Calendar.DATE, 3);
Date result = cal.getTime();

With Hutool (Even on Java 6):

Date result = DateUtil.offsetDay(new Date(), 3);
// Or even cleaner
String dateStr = DateUtil.format(new Date(), "yyyy-MM-dd HH:mm:ss");

Hutool wraps the ugly Calendar logic so you don't have to look at it.