owen800q

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.HttpClientBuilder;
import org.json.JSONObject;

owen800q

Proxy settings have not been autoconfigured by default. You need to configure Proxy settings manually
On windows, it's automatically configured. This issue troubled me for few days. Here's how I solved it


There are two approaches to configure proxy setting on ubuntu

By terminal

step 1: run nano .bashrc

owen800q

Proxy settings have not been autoconfigured by default. You need to configure Proxy settings manually
On windows, it's automatically configured. This issue troubled me for few days. Here's how I solved it


There are two approaches to configure proxy setting on ubuntu

By terminal

step 1: run nano .bashrc

owen800q

owen800q

When I tried to connect mysql server with root user that's running on a docker container

The warm message was shown Host '172.18.0.1' is not allowed to connect to this MySQL server

In MySQL database, execute this SQL script to list all existing database users

SELECT host, user FROM mysql.user;

It will display a table, for example like this:
+------------+------------------+

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docker cp <containerId>:/file/path/within/container /host/path/target

owen800q

Note different python builds can have different modules, they do not share modules

Python 2.7 has it own pip and pipenv

Python 3.7 has it pip3 and pipenv

Upgrading pip3 and pipenv for python 3

pip3 install --upgrade pip.

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/*
JPA (Java Persistence API)

Transaction Management with an Entity-Mananger:
---
entityManager.getTransaction().begin();
entityManager.persist(<some-entity>);
entityManager.getTransaction().commit();
entityManager.clear();

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<?xml version="1.0" encoding="UTF-8"?>

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
   http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
	version="1.0">


	<!-- derby -->

owen800q

// Enable component-scanning and auto-configuration with @SpringBootApplication Annotation
// It combines @Configuration + @ComponentScan + @EnableAutoConfiguration
@SpringBootApplication
public class FooApplication {
  public static void main(String[] args) {
    // Bootstrap the application
    SpringApplication.run(FooApplication.class, args);
  }
}