Spring boot Gradle project construction

Creating Gradle Project with IDEA

File - > New - > Project - > Gradle (in the left option bar)

The following catalogues are generated after the establishment of the routine project:

• build
• gradle
  • wrapper
    • gradle-wrapper.jar
    • gradle-wrapper.properties
• src
  • java
  • resources
• test
  • java
  • resources
• build.gradle
• gradlew
• gradlew.bat
• settings.gradle

Configure Spring boot

The following two documents need to be edited:

The revised version of the_build.gradle file is as follows:

plugins {
    id 'java'
    id 'com.gradle.build-scan' version '2.0.2'
    id 'org.springframework.boot' version '2.0.5.RELEASE'
    id 'io.spring.dependency-management' version '1.0.7.RELEASE'
}

group 'seckill'
version '1.0-SNAPSHOT'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.12'

    implementation 'org.springframework.boot:spring-boot-dependencies:2.0.5.RELEASE'
    implementation 'org.springframework.boot:spring-boot-starter-web'

    testImplementation 'org.springframework.boot:spring-boot-starter-test'

    components {
        withModule('org.springframework:spring-beans') {
            allVariants {
                withDependencyConstraints {
                    // Need to patch constraints because snakeyaml is an optional dependency
                    it.findAll { it.name == 'snakeyaml' }.each { it.version { strictly '1.19' } }
                }
            }
        }
    }
}

buildScan {

    // always accept the terms of service
    termsOfServiceUrl = 'https://gradle.com/terms-of-service'
    termsOfServiceAgree = 'yes'

    // always publish a build scan
    publishAlways()
}

The revised_setting.gradle file is as follows:

rootProject.name = 'seckill'
enableFeaturePreview('IMPROVED_POM_SUPPORT')

Writing classes

First, the source directory com. seckill. spring (equivalent to com/seckill/spring) is generated under src/java.

    Create Application.java under src/java, which is as follows:

package com.seckill.spring;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

Create directory controllers under src/java/com.seckill.spring and create a class in the controllers directory: HelloWorld, which defines the root route and returns to HelloWorld. The code is as follows:

package com.seckill.spring.controllers;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;

@RestController
public class HelloWorld {
    @RequestMapping(value = "/", method = RequestMethod.GET)
    public Map helloWorld() {
        Map<String, Object> ret = new HashMap<>();
        ret.put("ret", "Hello World");
        return ret;
    }
}

Running access

• Running the Application class, you can see the default listening on port 8080 in the console
• Browser access: localhost:8080, you can see the return string Hello World

Reference link

• 1.Building Spring Boot 2 Applications with Gradle
• 2.Learn Spring Boot
• 3.Building a RESTful Web Service