有效沟通问答-【官方】百战程序员_IT在线教育培训机构

from threading import Thread,local
from werkzeug.local import Local
local=Local()

local.request='具体用户的请求对象'
class MyThread(Thread):
    def run(self):
        local.request = 'qing'
        print('子线程:',local.request)

mythread = MyThread()
mythread.start()
mythread.join()
print('主线程：',local.request)

Python 全系列/第八阶段：轻量级Web开发利器-Flask框架/Flask高级 17461楼

<setting name="lazyLoadTriggerMethods" value="" />

老师，请问：视频中说当 lazyLoadTriggerMethods 属性的 value 值为空时，表示任何方法都不会触发立即加载，那为什么调用 user.getOrders() 方法时还是会触发呢？而且我测试过了，当 value 值为空时，只有调用对应关联对象的 get 方法才会触发立即加载，其余方法均无效，是这样的吗？

JAVA 全系列/第六阶段：项目管理与SSM框架/Mybatis 17462楼

听了之后感觉很懵啊，是不是可以理解为类属于一个大的工厂，这个工厂中包含原材料，生产机器和机器的操作步骤，然后去生产出不同的产品，那这些材料，和机器是不是就相当于这个类的属性？机器的操作过程属于方法，那这个面向对象指的是谁呢？是生产出来的产品是对象吗？还是是说我的这些材料，生产机器以及生产方法就是对象。

JAVA 全系列/第一阶段：JAVA 快速入门/面向对象详解和JVM底层内存分析 17463楼

import time
time1=time.time()
a=("")
for i in range(1000000):
    a+"sxt"
time2=time.time()
print("+连接的运算时间:"+str(time2-time1))
time3=time.time()
Li=[]
for i in range(1000000):
    Li.append("sxt")
d="".join(Li)
time4=time.time()
print("join连接的运算时间:"+str(time4-time3))

输出结果：+连接的运算时间:0.03805875778198242

join连接的运算时间:0.06179380416870117

+号运算时间比join运算时间要短是为什么？

Python 全系列/第一阶段：Python入门/编程基本概念 17464楼

问题:并没有删除cc的父目录bb，没找到原因?

package com.bjsxt.File;

import java.io.File;

public class testDirectory {
	public static void main(String[] args) {
//		File f = new File("/Users/hongjuansun/Desktop/testDirectory");
//		f.mkdir();//创建单层目录
//		System.out.println("判断目录是否存在:"+f.exists());
//		System.out.println("是否是目录:"+f.isDirectory());
//		System.out.println("删除目录:"+f.delete()); //delete删除目录时,只能删除空目录
		File f1 = new File("/Users/hongjuansun/Desktop/aa/bb/cc");//虽然创建了3个目录，但是f1代表的是cc
		f1.mkdirs();//创建多层目录
		File parent = f1.getParentFile();//获取cc目录的父级目录
		System.out.println("cc的父目录是:"+parent);
		//此时我想删除cc的父目录,但是delete删除目录时只能删除空目录，所以先删除cc，在删除cc的父目录
		f1.delete();//删除cc
		System.out.println(parent.delete());//打印是否删除bb目录	
	}

}

程序运行结果:

桌面查看文件夹结果:

JAVA 全系列/第二阶段：JAVA 基础深化和提高/常用类 17465楼

jQuery22网站没有一个是免费的呀老师，是不是搞错了

JAVA 全系列/第四阶段：网页编程和设计/Jquery（旧） 17466楼

老师代码和您的一样为什么爬取到的数据是缺失的呢？

在爬取的时候有格式错误的提醒

Python 全系列/第二十阶段：Python数据分析项目/旅游景点票价预测 17467楼

高老师讲的代码中需要用到getset方法，我自己写代码的时候把get代码去掉也不影响结果，这个get的作用是什么呢

JAVA 全系列/第一阶段：JAVA 快速入门/数组和数据存储 17468楼

老师这个守护线程已经调用析构函数为什么还会继续执行呢

Python 全系列/第三阶段：Python 网络与并发编程/并发编程 17469楼

那这第二题照理说，C也是对的吧，因为Closeable接口继承自AutoCloseable接口，不会是么

JAVA 全系列/第二阶段：JAVA 基础深化和提高/IO流技术 17470楼

老师你好

请问闭包的第三个优点，让这些变量的值始终保存在内存中是什么意思？

是指一般情况下局部变量的值用完就清空了吗？

那下次在调用这个方法不还能调出这个值吗

JAVA 全系列/第四阶段：网页编程和设计/Jquery（旧） 17471楼

十二月 10, 2019 5:16:42 下午 org.springframework.test.context.support.AbstractTestContextBootstrapper getDefaultTestExecutionListenerClassNames
信息: Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener]
十二月 10, 2019 5:16:42 下午 org.springframework.test.context.support.AbstractTestContextBootstrapper instantiateListeners
信息: Could not instantiate TestExecutionListener [org.springframework.test.context.web.ServletTestExecutionListener]. Specify custom listener classes or make the default listener classes (and their required dependencies) available. Offending class: [javax/servlet/ServletContext]
十二月 10, 2019 5:16:42 下午 org.springframework.test.context.support.AbstractTestContextBootstrapper getTestExecutionListeners
信息: Using TestExecutionListeners: [org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@1daadbf7, org.springframework.test.context.support.DependencyInjectionTestExecutionListener@3c4f4458, org.springframework.test.context.support.DirtiesContextTestExecutionListener@78100c56, org.springframework.test.context.transaction.TransactionalTestExecutionListener@659a1fae, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener@69960c9e]
十二月 10, 2019 5:16:42 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [ApplicationContext.xml]
十二月 10, 2019 5:16:42 下午 org.springframework.test.context.TestContextManager prepareTestInstance
严重: Caught exception while allowing TestExecutionListener [org.springframework.test.context.support.DependencyInjectionTestExecutionListener@3c4f4458] to prepare test instance [com.yangge.test.UsersDaoImplTest@188553b2]
java.lang.IllegalStateException: Failed to load ApplicationContext
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:117)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83)
at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:228)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:217)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:276)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:278)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:236)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:87)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 41 in XML document from class path resource [ApplicationContext.xml] is invalid; nested exception is org.xml.sax.SAXParseException; lineNumber: 41; columnNumber: 102; cvc-complex-type.2.4.a: 发现了以元素 'bean' 开头的无效内容。应以 '{"http://www.springframework.org/schema/beans":description, "http://www.springframework.org/schema/beans":meta, "http://www.springframework.org/schema/beans":constructor-arg, "http://www.springframework.org/schema/beans":property, "http://www.springframework.org/schema/beans":qualifier, "http://www.springframework.org/schema/beans":lookup-method, "http://www.springframework.org/schema/beans":replaced-method, WC[##other:"http://www.springframework.org/schema/beans"]}' 之一开头。
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:399)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:181)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:217)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:188)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:252)
at org.springframework.test.context.support.AbstractGenericContextLoader.loadBeanDefinitions(AbstractGenericContextLoader.java:253)
at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:122)
at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:60)
at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.delegateLoading(AbstractDelegatingSmartContextLoader.java:109)
at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext(AbstractDelegatingSmartContextLoader.java:261)
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98)
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116)
... 25 more
Caused by: org.xml.sax.SAXParseException; lineNumber: 41; columnNumber: 102; cvc-complex-type.2.4.a: 发现了以元素 'bean' 开头的无效内容。应以 '{"http://www.springframework.org/schema/beans":description, "http://www.springframework.org/schema/beans":meta, "http://www.springframework.org/schema/beans":constructor-arg, "http://www.springframework.org/schema/beans":property, "http://www.springframework.org/schema/beans":qualifier, "http://www.springframework.org/schema/beans":lookup-method, "http://www.springframework.org/schema/beans":replaced-method, WC[##other:"http://www.springframework.org/schema/beans"]}' 之一开头。
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:198)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:437)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:368)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:325)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(XMLSchemaValidator.java:458)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.reportSchemaError(XMLSchemaValidator.java:3237)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1796)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:746)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:378)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2778)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:117)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:347)
at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:76)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadDocument(XmlBeanDefinitionReader.java:429)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:391)
... 38 more

老师这是提示路径错误吗但是我得路径也没错啊

package com.yangge.test;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.annotation.Transactional;

import com.yangge.dao.UsersDao;
import com.yangge.pojo.Users;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:ApplicationContext.xml")
public class UsersDaoImplTest {
@Autowired
private UsersDao usersDao;
@Test
@Transactional
public void insert(){
Users users =new Users(1,"寮犱笁",22);
usersDao.insertUsers(users);
}

}

在src目录下得

JAVA 全系列/（旧的隐藏）第十阶段：spring全家桶（SpringData）/Spring Data 17472楼

找不到那个SQL文件呀老师

JAVA 全系列/第三阶段：数据库编程/MySQL数据库 17473楼

老师他这个配置文件怎么报错？？

WEB前端全系列/第七阶段：ECMAScript6新特性模块/ES6第一部分 17474楼

为什么前面要加“

Python 全系列/第一阶段：Python入门/编程基本概念 17475楼

同学您好