[Java] 5分钟快速上手Spring Boot

• project：选择项目构建的工具，采用默认的maven；
  
• language：选择构建项目的语言，采用默认的java；
  
• spring boot：选择使用的springboot的版本信息，采用最新版本2.1.3；
  
• project metadata：设置项目的元数据，主要就是设置maven相关的配置；group，对应maven中的groupid，artifact对应maven中的artifactid。
  

• packaging：指定打包的模式，默认采用jar包模式，即使用java -jar启动即可，如果需要部署到单独的tomcat或其他web容器，则可选择war包。
  
• java version：springboot2.13默认支持最低jdk为8。
  

<?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 http://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>2.1.3.release</version>
  <relativepath/> <!-- lookup parent from repository -->
  </parent>
  <groupid>com.example</groupid>
  <artifactid>demo</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.springframework.boot</groupid>
    <artifactid>spring-boot-starter-test</artifactid>
    <scope>test</scope>
  </dependency>
  </dependencies>
 
  <build>
  <plugins>
    <plugin>
    <groupid>org.springframework.boot</groupid>
    <artifactid>spring-boot-maven-plugin</artifactid>
    </plugin>
  </plugins>
  </build>
 
</project>

package com.example.demo.controller;
 
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.restcontroller;
 
/**
 * @author zzs
 */
@restcontroller
public class helloworldcontroller {
 
  @requestmapping
  public string hello() {
    return "hello world!";
  }
}

package com.example.demo;
 
import com.example.demo.controller.helloworldcontroller;
import org.junit.before;
import org.junit.test;
import org.junit.runner.runwith;
import org.springframework.boot.test.context.springboottest;
import org.springframework.http.mediatype;
import org.springframework.test.context.junit4.springrunner;
import org.springframework.test.web.servlet.mockmvc;
import org.springframework.test.web.servlet.request.mockmvcrequestbuilders;
import org.springframework.test.web.servlet.setup.mockmvcbuilders;
 
import static org.hamcrest.core.isequal.equalto;
import static org.springframework.test.web.servlet.result.mockmvcresultmatchers.content;
import static org.springframework.test.web.servlet.result.mockmvcresultmatchers.status;
 
@runwith(springrunner.class)
@springboottest
public class demoapplicationtests {
 
  private mockmvc mockmvc;
 
  @before
  public void init() {
    mockmvc = mockmvcbuilders.standalonesetup(new helloworldcontroller()).build();
  }
 
  @test
  public void testhello() throws exception {
    mockmvc.perform(mockmvcrequestbuilders.get("/hello").accept(mediatype.application_json))
        .andexpect(status().isok())
        .andexpect(content().string(equalto("hello world!")));
  }
}