RError.com

RError.com Logo RError.com Logo

RError.com Navigation

  • 主页

Mobile menu

Close
  • 主页
  • 系统&网络
    • 热门问题
    • 最新问题
    • 标签
  • Ubuntu
    • 热门问题
    • 最新问题
    • 标签
  • 帮助
主页 / 问题 / 1544089
Accepted
mister_svinia
mister_svinia
Asked:2023-10-05 03:50:09 +0000 UTC2023-10-05 03:50:09 +0000 UTC 2023-10-05 03:50:09 +0000 UTC

类中的无效字段“”

  • 772

这是课程:

import at.favre.lib.crypto.bcrypt.BCrypt;
import com.jsoniter.JsonIterator;
import com.jsoniter.any.Any;
import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.NotNull;

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

import static java.util.Map.entry;

public class Helper {
    public static class ConnectionPath {
        String[] pathParts;
        Map<String, String> params;

        public ConnectionPath (String[] pathParts, Map<String, String> params) {
            this.pathParts = pathParts;
            this.params = params;
        }
    }

    public static class MessagePacket {
        final String hash;
        final String[] intention;
        final String preData;
        Object postData;

        public MessagePacket (String[] intention, String controlSum, String data) {
            this.intention = intention;
            this.hash = controlSum;
            this.preData = data;
        }

        public void parseData (Class pattern) {
            postData = JsonIterator.deserialize(preData, pattern);
        }
    }

    @Contract("_ -> new")
    public static @NotNull ConnectionPath parseURI (@NotNull String uri) {
        int index = uri.indexOf('?');
        String path = uri.substring(0, index);
        String query = uri.substring(index + 1);

        String[] pathParts = path.split("/");

        Map<String, String> params = new HashMap<>();
        for (String param : query.split("&")) {
            String[] entry = param.split("=");

            params.put(entry[0], entry[1]);
        }

        return new ConnectionPath(pathParts, params);
    }

    @Contract("_ -> new")
    public static @NotNull MessagePacket parsePacket (@NotNull String packet) {
        String[] splitPacket = packet.split("%");

        return new MessagePacket(splitPacket[0].split("-"), splitPacket[1], splitPacket[2]);
    }

    public static Boolean verifierBCrypt (@NotNull String data, byte[] hash_data) {
        return BCrypt.verifyer().verify(Arrays.copyOfRange(data.toCharArray(), 0, Math.min(data.toCharArray().length, 72)), hash_data).verified;
    }

    public static String SHA512 (String string) {
        MessageDigest md;

        try {
            md = MessageDigest.getInstance("SHA-512");
        } catch (NoSuchAlgorithmException _) {
            return string;
        }

        byte[] bytes = md.digest(string.getBytes(StandardCharsets.UTF_8));
        StringBuilder sb = new StringBuilder();

        for (byte aByte : bytes) {
            sb.append(Integer.toString((aByte & 0xff) + 0x100, 16).substring(1));
        }

        return sb.toString();
    }
}

我正在测试:

public class Starter {
    public static void main (String[] args) {
        Helper.parseURI("/id=4&token=user.4.wsm3mOlDwbhaHD0iG33nQ9CwBEIf3B7al5Bylki1XpuKOHAxy2og1mmqdIs5yALmW");

        System.out.println("Прошло!");
    }
}

但程序崩溃了:

C:\Users\Fluorum\.jdks\sapmachine-21\bin\java.exe --enable-preview "-javaagent:C:\Users\Fluorum\AppData\Local\Programs\IntelliJ IDEA Community Edition\lib\idea_rt.jar=56493:C:\Users\Fluorum\AppData\Local\Programs\IntelliJ IDEA Community Edition\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath E:\Projects\GigaChat\RTCD\out\production\RTCD;C:\Users\Fluorum\.m2\repository\com\jsoniter\jsoniter\0.9.23\jsoniter-0.9.23.jar;C:\Users\Fluorum\.m2\repository\org\java-websocket\Java-WebSocket\1.5.4\Java-WebSocket-1.5.4.jar;C:\Users\Fluorum\.m2\repository\org\slf4j\slf4j-api\2.0.6\slf4j-api-2.0.6.jar;C:\Users\Fluorum\.m2\repository\at\favre\lib\bcrypt\0.10.2\bcrypt-0.10.2.jar;C:\Users\Fluorum\.m2\repository\at\favre\lib\bytes\1.5.0\bytes-1.5.0.jar;C:\Users\Fluorum\.m2\repository\org\jetbrains\annotations\24.0.0\annotations-24.0.0.jar;C:\Users\Fluorum\.m2\repository\org\postgresql\postgresql\42.6.0\postgresql-42.6.0.jar;C:\Users\Fluorum\.m2\repository\org\checkerframework\checker-qual\3.31.0\checker-qual-3.31.0.jar Starter
Exception in thread "main" java.lang.ClassFormatError: Illegal field name "" in class Helper
    at java.base/java.lang.ClassLoader.defineClass1(Native Method)
    at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1027)
    at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)
    at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:862)
    at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:760)
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:681)
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:639)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
    at Starter.main(Starter.java:7)

Process finished with exit code 1

代码从哪里获取空字段?唯一的猜测是哈希映射键。但在这一行中它们不是空的?

UPD我试图进行标注:

public class Starter {
    @Contract("_ -> new")
    public static @NotNull Helper.ConnectionPath parseURI (@NotNull String uri) {
        int index = uri.indexOf('?');
        String path = uri.substring(0, index);
        String query = uri.substring(index + 1);

        String[] pathParts = path.split("/");

        System.out.println(Arrays.toString(pathParts));

        Map<String, String> params = new HashMap<>();
        for (String param : query.split("&")) {
            String[] entry = param.split("=");
            System.out.println("-----");
            System.out.println(Arrays.toString(entry));
            params.put(entry[0], entry[1]);
        }

        return new Helper.ConnectionPath(pathParts, params);
    }

    public static void main (String[] args) {
        Helper.ConnectionPath returner = parseURI("/id=4&token=user.4.wsm3mOlDwbhaHD0iG33nQ9CwBEIf3B7al5Bylki1XpuKOHAxy2og1mmqdIs5yALmW");

        System.out.println("Прошло!");
        System.out.println(returner);
    }
}

但现在错误完全不同了:

C:\Users\Fluorum\.jdks\sapmachine-21\bin\java.exe --enable-preview "-javaagent:C:\Users\Fluorum\AppData\Local\Programs\IntelliJ IDEA Community Edition\lib\idea_rt.jar=60335:C:\Users\Fluorum\AppData\Local\Programs\IntelliJ IDEA Community Edition\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath E:\Projects\GigaChat\RTCD\out\production\RTCD;C:\Users\Fluorum\.m2\repository\com\jsoniter\jsoniter\0.9.23\jsoniter-0.9.23.jar;C:\Users\Fluorum\.m2\repository\org\java-websocket\Java-WebSocket\1.5.4\Java-WebSocket-1.5.4.jar;C:\Users\Fluorum\.m2\repository\org\slf4j\slf4j-api\2.0.6\slf4j-api-2.0.6.jar;C:\Users\Fluorum\.m2\repository\at\favre\lib\bcrypt\0.10.2\bcrypt-0.10.2.jar;C:\Users\Fluorum\.m2\repository\at\favre\lib\bytes\1.5.0\bytes-1.5.0.jar;C:\Users\Fluorum\.m2\repository\org\jetbrains\annotations\24.0.0\annotations-24.0.0.jar;C:\Users\Fluorum\.m2\repository\org\postgresql\postgresql\42.6.0\postgresql-42.6.0.jar;C:\Users\Fluorum\.m2\repository\org\checkerframework\checker-qual\3.31.0\checker-qual-3.31.0.jar Starter
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: Range [0, -1) out of bounds for length 84
    at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:55)
    at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:52)
    at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:213)
    at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:210)
    at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:98)
    at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckFromToIndex(Preconditions.java:112)
    at java.base/jdk.internal.util.Preconditions.checkFromToIndex(Preconditions.java:349)
    at java.base/java.lang.String.checkBoundsBeginEnd(String.java:4861)
    at java.base/java.lang.String.substring(String.java:2830)
    at Starter.parseURI(Starter.java:12)
    at Starter.main(Starter.java:35)

Process finished with exit code 1

UDP 2我又做了一些实验。我发现,如果我注释掉该方法SHA512(通过 的哈希函数SHA-512),错误就会消失并且一切正常。

java
  • 1 1 个回答
  • 45 Views

1 个回答

  • Voted
  1. Best Answer
    mister_svinia
    2023-10-05T14:55:07Z2023-10-05T14:55:07Z

    经过实验,我发现了问题所在。结果发现它与解析器完全无关。出于某种原因,尽管21个Java,他并没有错过这段代码(虽然IDEA不骂人):

    public static String SHA512 (String string) {
        MessageDigest md;
    
        try {
            md = MessageDigest.getInstance("SHA-512");
        } catch (NoSuchAlgorithmException _) {
            return string;
        }
    
        byte[] bytes = md.digest(string.getBytes(StandardCharsets.UTF_8));
        StringBuilder sb = new StringBuilder();
    
        for (byte aByte : bytes) {
            sb.append(Integer.toString((aByte & 0xff) + 0x100, 16).substring(1));
        }
    
        return sb.toString();
    }
    

    虽然这很平静:

    public static String SHA512 (String string) {
        MessageDigest md;
    
        try {
            md = MessageDigest.getInstance("SHA-512");
        } catch (NoSuchAlgorithmException e) {
            return string;
        }
    
        byte[] bytes = md.digest(string.getBytes(StandardCharsets.UTF_8));
        StringBuilder sb = new StringBuilder();
    
        for (byte aByte : bytes) {
            sb.append(Integer.toString((aByte & 0xff) + 0x100, 16).substring(1));
        }
    
        return sb.toString();
    }
    
    • 0

相关问题

  • wpcap 找不到指定的模块

  • 如何以编程方式从桌面应用程序打开 HTML 页面?

  • Android Studio 中的 R.java 文件在哪里?

  • HashMap 初始化

  • 如何使用 lambda 表达式通过增加与原点的距离来对点进行排序?

  • 最大化窗口时如何调整元素大小?

Sidebar

Stats

  • 问题 10021
  • Answers 30001
  • 最佳答案 8000
  • 用户 6900
  • 常问
  • 回答
  • Marko Smith

    我看不懂措辞

    • 1 个回答
  • Marko Smith

    请求的模块“del”不提供名为“default”的导出

    • 3 个回答
  • Marko Smith

    "!+tab" 在 HTML 的 vs 代码中不起作用

    • 5 个回答
  • Marko Smith

    我正在尝试解决“猜词”的问题。Python

    • 2 个回答
  • Marko Smith

    可以使用哪些命令将当前指针移动到指定的提交而不更改工作目录中的文件?

    • 1 个回答
  • Marko Smith

    Python解析野莓

    • 1 个回答
  • Marko Smith

    问题:“警告:检查最新版本的 pip 时出错。”

    • 2 个回答
  • Marko Smith

    帮助编写一个用值填充变量的循环。解决这个问题

    • 2 个回答
  • Marko Smith

    尽管依赖数组为空,但在渲染上调用了 2 次 useEffect

    • 2 个回答
  • Marko Smith

    数据不通过 Telegram.WebApp.sendData 发送

    • 1 个回答
  • Martin Hope
    Alexandr_TT 2020年新年大赛! 2020-12-20 18:20:21 +0000 UTC
  • Martin Hope
    Alexandr_TT 圣诞树动画 2020-12-23 00:38:08 +0000 UTC
  • Martin Hope
    Air 究竟是什么标识了网站访问者? 2020-11-03 15:49:20 +0000 UTC
  • Martin Hope
    Qwertiy 号码显示 9223372036854775807 2020-07-11 18:16:49 +0000 UTC
  • Martin Hope
    user216109 如何为黑客设下陷阱,或充分击退攻击? 2020-05-10 02:22:52 +0000 UTC
  • Martin Hope
    Qwertiy 并变成3个无穷大 2020-11-06 07:15:57 +0000 UTC
  • Martin Hope
    koks_rs 什么是样板代码? 2020-10-27 15:43:19 +0000 UTC
  • Martin Hope
    Sirop4ik 向 git 提交发布的正确方法是什么? 2020-10-05 00:02:00 +0000 UTC
  • Martin Hope
    faoxis 为什么在这么多示例中函数都称为 foo? 2020-08-15 04:42:49 +0000 UTC
  • Martin Hope
    Pavel Mayorov 如何从事件或回调函数中返回值?或者至少等他们完成。 2020-08-11 16:49:28 +0000 UTC

热门标签

javascript python java php c# c++ html android jquery mysql

Explore

  • 主页
  • 问题
    • 热门问题
    • 最新问题
  • 标签
  • 帮助

Footer

RError.com

关于我们

  • 关于我们
  • 联系我们

Legal Stuff

  • Privacy Policy

帮助

© 2023 RError.com All Rights Reserve   沪ICP备12040472号-5