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如何排除第三方使用的jar包冲突？

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1

maven

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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redis连接公司服务器失败

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1

redis

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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redis+数据库数据展示报错

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1

redis

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

@Override
    public List<Student> studentList() {
        List<Student> studentList =   (List<Student>) redisUtil.get("studentList");
        if (studentList != null) {
            //todo 从缓存读取数据
            logger.error("=============缓存=========");
            return studentList;
        } else {
            logger.error("==========数据库==========");
            //todo List<Student> userList = 从数据库取
            studentList = studentDao.selectAll();
            redisUtil.set("studentList", studentList, 60 * 60L);
        }

        //todo 业务逻辑
        return studentList;
    }

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mybatis在连接数据库中运行项目时找不到项目文件。

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1

spring

class="cursor-pointer"> 详细描述

log4j:WARN No appenders could be found for logger (org.apache.ibatis.logging.LogFactory).

log4j:WARN Please initialize the log4j system properly.

log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

Exception in thread "main" org.apache.ibatis.exceptions.PersistenceException:

### Error building SqlSession.

### The error may exist in SQL Mapper Configuration

### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource jdbc.properties

at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)

at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:80)

at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:64)

at Test.main(Test.java:18)

Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource jdbc.properties

at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:121)

at org.apache.ibatis.builder.xml.XMLConfigBuilder.parse(XMLConfigBuilder.java:99)

at org.apache.ibatis.session.SqlSessionFactoryBuilder.build(SqlSessionFactoryBuilder.java:78)

... 2 more

Caused by: java.io.IOException: Could not find resource jdbc.properties

at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:114)

at org.apache.ibatis.io.Resources.getResourceAsStream(Resources.java:100)

at org.apache.ibatis.io.Resources.getResourceAsProperties(Resources.java:128)

at org.apache.ibatis.builder.xml.XMLConfigBuilder.propertiesElement(XMLConfigBuilder.java:225)

at org.apache.ibatis.builder.xml.XMLConfigBuilder.parseConfiguration(XMLConfigBuilder.java:106)

... 4 more

Process finished with exit code 1

class="cursor-pointer"> 错误截图

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pom中引入的插件无法使用

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1

maven

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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springcloud加载不到配置中心的文件

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1

mybatis

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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使用shade,assembly打包失败,有包,但是打出来不能运行

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1

class="cursor-pointer"> 详细描述

<plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.2.0</version>
                <configuration>
                    
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                           
                            <transformers>
                                
                                <transformer
                                        implements="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>main.MainApp</mainClass>
                                </transformer>
                                
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                    <resource>META-INF/spring.handlers</resource>
                                </transformer>
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                    <resource>META-INF/spring.schemas</resource>
                                </transformer>
                            </transformers>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

assembly插件

class="cursor-pointer"> 错误截图

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java的i/o流使用什么类型接收参数其对于系统性能消耗较小

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1

复盘踩坑

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

//scannner类接收参数 
 Scanner input = new Scanner(System.in);
//bufferreader接收参数
 BufferedReader reader1 = new BufferedReader(new InputStreamReader(System.in));
        BufferedReader reader2 = new BufferedReader(new InputStreamReader(System.in));

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连接池，在springjdbc项目中配置了连接池，想问问具体获得链接的是哪一步

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1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

public void testinsert() throws IOException {
        long t1 = System.currentTimeMillis();
        System.out.println("开始时间：" + t1);
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        List<Stu> stus = new ArrayList<Stu>();
        for (int i = 0; i < 1000000; i++) {
            stuDao = context.getBean(StuDao.class);
            Stu stu1 = new Stu();
            stu1.setName("螳臂当车的歹徒" );
            long a=5000000+i;
            stu1.setStu_id(a);
            stu1.setSex(true);
            stu1.setAge(133);
            stu1.setCreate_at(System.currentTimeMillis());
            stu1.setUpdate_at(0L);
            stus.add(stu1);
            //                System.out.println(stu1);
        }

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启动Spring Boot时，，抛出异常信息如下：

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1

springboot

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.boot.SpringApplication;
@Controller
@SpringBootApplication
@Configuration
public class HelloApplication {
    @RequestMapping("hello")
    @ResponseBody
    public String hello() {
        return "hello world！";
    }
    public static void main(String[] args) {
        SpringApplication.run(HelloApplication.class, args);
    }
}