## 下载maven
http://maven.apache.org/download.cgi

最新版3.6.3

### 环境变量
- Path
添加

### 配置maven镜像
由于境外很慢，所以配置阿里云maven镜像

添加：

在C:/Users/ablo_/java/apache-maven-3.6.3/conf/settings.xml 里面同样添加mirror里的内容。

# 下载配置vscode
- 官网：https://code.visualstudio.com/
- 下载地址：https://code.visualstudio.com/download

Windows下最好下载专门为java开发者配置的版本：
https://aka.ms/vscode-java-installer-win
其他操作系统则需手动设置jdk等配置。

打开扩展视图(Ctrl+Shift+X),
在扩展插件里搜java，
下载微软官方java extension pack及pivotal的Spring Boot  extension pack

单独的话需要 Language Support for Java(TM) by Red Hat及Spring Initializr Java Support，Maven for Java
等相关插件。

其中，java extension pack 包含：
1. Language Support for Java(TM) by Red Hat
1. Debugger for Java
1. Java Test Runner
1. Maven for Java
1. Java Dependency Viewer
1. Visual Studio IntelliCode

Spring Boot Extension Pack 包含Spring Initializr Java Support，Spring Boot Tools，Spring Boot Dashboard，Cloud Foundry Manifest YML Support，Concourse CI Pipeline Editor等组件。


根据需要，再下载其他相关插件即可：
1. Spring Boot Tools
1. Spring Initializr Java Support
1. Spring Boot Dashboard
1. Tomcat
1. Jetty
1. CheckStyle
2. Lombok Annotations Support for VS Code


安装完插件可能需要重启vscode。

## 配置maven
打开 `File->Preferences->Settings`，搜索 maven，点击editing in settings.json

在打开的文件中填入

"java.home": "C:\\Users\\ablo_\\java\\jdk-13.0.1",

"maven.terminal.customEnv": [
    {
        "environmentVariable": "JAVA_HOME",       
        "value": "C:\\Users\\ablo_\\java\\jdk-13.0.1"       
    }
], ``` 不使用vs自带的maven更可控一些。

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "name": "Debug (Launch) - External Console",
            "request": "launch",
           "cwd":"${workspaceRoot}",
            "mainClass": "${file}",
            "console": "externalTerminal"
            "jdkPath": "${env:JAVA_HOME}/bin",
            
        },
        {
            "type": "java",
            "name": "Debug (Launch)-Main",
            "request": "launch",
            "mainClass": "",
            "args":"",
            "console":"integratedTerminal",
            "projectName": ""
        }
    ]
}

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.2.1.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.abloz</groupId>
	<artifactId>demo1</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>2.1.1</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version>1.18.10</version>
			<scope>provided</scope>
		</dependency>
		<!-- 添加 Spring Data JPA 依赖 -->  
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency> 

		<dependency>
			<groupId>com.h2database</groupId>
			<artifactId>h2</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
	
 </dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

server:
  port: 8080
spring:
  datasource:
    url: jdbc:h2:~/test
    driver-class-name: org.h2.Driver
    username: sa
    password: 123456

  jpa:
    database: h2
    hibernate:
      ddl-auto: update
    show-sql: true
  h2:
    console:
      path: /h2-console
      enabled: true

package com.abloz.demo1;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class DemoApplication {

    @Bean
    InitializingBean initUser(UserRepo repo){
        return ()->{
            repo.save(new User((long)1,"张三",20,1));
            repo.save(new User(2L,"李四",22,1));
            repo.save(new User(0L, "西施",18,0));
            repo.save(new User(0L, "貂蝉",15,0));
            
        };
    }
	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}

}

package com.abloz.demo1;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
public class HelloController {

    @Autowired
    private UserRepo userRepo;

    @ResponseBody
    @RequestMapping("/hello")
    public List<User> hello(){
        return userRepo.findAll();
    }
}

package com.abloz.demo1;

import javax.persistence.*;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String name;
    private Integer age;
    private Integer sex;
}

package com.abloz.demo1;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepo extends JpaRepository<User, Long> {
    

}