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bodrovdeni's questions

Martin Hope
bodrovdeni
Asked: 2022-08-26 22:37:51 +0800 CST
  • 0

我是 Java 新手，一个问题困扰着我：如何正确中断循环？

我有一个带有数字字段的文本框（字段数量不受限制），我用“for”循环读取它，当数字用完时，我通过“catch”异常退出。

或多或少像这样：


        try {
            reader = new BufferedReader(new FileReader("src/cache/vk" + own_Id + "/Id/Idold.txt"));
            for (int i = 0; i <= 4; i ++) {
                postIdOld [i] = Integer.parseInt(reader.readLine());
            }
        } catch (RuntimeException e) {
            System.out.println("reader faile");
            break;
        } finally {
            reader.close();
        }

我做得对还是有更好的方法？

java
Martin Hope
bodrovdeni
Asked: 2022-08-23 17:52:22 +0800 CST
  • 0

我不能做一个简单的操作。有一个带有整数的文本文件，我正在尝试读取该数字，对其进行处理并将其返回到同一个文件中。但由于某种原因，它不起作用。请告诉我我的错误在哪里？

执行前的文本：


    123456

    package org.example;

import java.io.*;
import java.nio.CharBuffer;

public class Main {

    static int number = 0;
    static int numbernext = 0;
    Integer send = 0;

    public static void main(String[] args) throws IOException {

        BufferedWriter writer = new BufferedWriter(new FileWriter("src/text.txt"));
        writer.write(number);
        writer.close();
        System.out.println(number);

        System.out.println("--------------------");

        BufferedReader reader = new BufferedReader(new FileReader("src/text.txt"));
        reader.read(CharBuffer.allocate(numbernext));
        reader.close();

        System.out.println(numbernext);

    }


}

执行后的文本文件：

文字测试

安慰：

控制台测试

java
Martin Hope
bodrovdeni
Asked: 2022-08-05 01:01:33 +0800 CST
  • 0

当我尝试运行时出现错误：

Caused by: 
com.vk.api.sdk.exceptions.ClientException: 
Internal API server error. Wrong status code: 401. 
Content: 
{"error":"invalid_grant","error_description":"Code is invalid or expired."}

起初我认为代码已经失去了有效性。
我又问了一遍，问题依旧。

像这样请求：

https://oauth.vk.com/authorize?client_id=41264482&display=page&redirect_uri=https://oauth.vk.com/blank.html&scope=wall,offline&response_type=code&v=5.131

请告诉我，我哪里做错了？

package reversbot.services;


import com.vk.api.sdk.client.TransportClient;
import com.vk.api.sdk.client.VkApiClient;
import com.vk.api.sdk.client.actors.UserActor;
import com.vk.api.sdk.exceptions.ApiException;
import com.vk.api.sdk.exceptions.ClientException;
import com.vk.api.sdk.httpclient.HttpTransportClient;
import com.vk.api.sdk.objects.UserAuthResponse;
import com.vk.api.sdk.objects.wall.GetFilter;
import com.vk.api.sdk.objects.wall.responses.GetResponse;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import javax.annotation.PostConstruct;

@Service
public class VkBot {

    @Value("${APP_ID}")
    int APP_ID;

    @Value("${CLIENT_SECRET}")
    String CLIENT_SECRET;

    @Value("${REDIRECT_URI}")
    String REDIRECT_URI;

    @Value("${code}")
    String code;

    @Scheduled(fixedDelay = 5000)
    @PostConstruct
    public void vkb() throws ClientException, ApiException {

        TransportClient transportClient = new HttpTransportClient();
        VkApiClient vk = new VkApiClient(transportClient);
        UserAuthResponse authResponse = vk.oAuth()
                .userAuthorizationCodeFlow(APP_ID, CLIENT_SECRET, REDIRECT_URI, code)
                .execute();

        UserActor actor = new UserActor(authResponse.getUserId(), authResponse.getAccessToken());

        GetResponse getResponse = vk.wall().get(actor)
                .ownerId(1)
                .count(100)
                .offset(5)
                .filter(GetFilter.valueOf("all"))
                .execute();
    }
}
java vkontakte-api
Martin Hope
bodrovdeni
Asked: 2022-08-02 00:25:15 +0800 CST
  • 0

我有三个班。我正在尝试在项目中连接@PropertySource，但application.properties 文件中的数据未激活，spring 没有将其拾取。请告诉我我的错误是什么？ 项目结构

主要的

package reversbot;

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import reversbot.services.VkBot;

@SpringBootApplication
public class Main {

    public static void main(String[] args) {
        ApplicationContext context = new AnnotationConfigApplicationContext (InjectionContext.class);
        VkBot vkBot = context.getBean(VkBot.class);
        vkBot.hello();
    }

}

注入上下文

package reversbot;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.scheduling.annotation.EnableScheduling;
import reversbot.services.VkBot;

@Configuration
@EnableScheduling
@PropertySource(value = "classpath:resources/application.properties", ignoreResourceNotFound = true)
public class InjectionContext {

    @Bean
    public VkBot vkBot() {

        return new VkBot();
    }
}

机器人

package reversbot.services;


import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import javax.annotation.PostConstruct;


@Service

public class VkBot {

    @Value("$(ide)")
    String ide;

    @Value("$(token)")
    String token;

    @Scheduled(fixedDelay = 5000)
    @PostConstruct
    public void hello(){

        System.out.println ("Hello BOSS!!!!");
        System.out.println("ide = " + ide);
        System.out.println("token = " + token);
        System.out.println("        ");
    }

}

ide = login
token = 12345678
java spring
Martin Hope
bodrovdeni
Asked: 2022-08-31 12:08:52 +0800 CST
  • 1

创建了主类 Main、classInjectionContext和 class Vk Bot。试图通过注入来控制类不会导致任何事情。没有错误，但也没有消息输出。请告诉我我的错误是什么？

package reversbot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

@SpringBootApplication
public class Main {

    public static void main(String... args) {
        ApplicationContext context = new AnnotationConfigApplicationContext (InjectionContext.class);
    }

}

package reversbot;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import reversbot.injectioncontext.VkBot;

import javax.annotation.PostConstruct;

@Configuration
public class InjectionContext {

    @Bean
    public VkBot vkBot() {
        return new VkBot();
    }
}

package reversbot.injectioncontext;

import org.springframework.stereotype.Service;

@Service
public class VkBot {

    public static void hello(){
        System.out.println("Hello BOSS!!!!");
    }

}

plugins {
    id 'org.springframework.boot' version '2.7.2'
    id 'io.spring.dependency-management' version '1.0.12.RELEASE'
    id 'java'
}

group = 'ReversBot'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '18'

repositories {
    mavenCentral()
}

dependencies {
    implementation 'org.springframework.boot:spring-boot-starter'
    testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

tasks.named('test') {
    useJUnitPlatform()
}
java