Springboot's Create Your simple application&tests__springboot

Application.java

Package Com.zhu;

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

@SpringBootApplication public
class DemoApplication {public

    static void Main (string[] args) {
        Springapplication.run (Demoapplication.class, args);
    }

@Bean public
    Commandlinerunner Commandlinerunner (ApplicationContext ctx) {return
        args-> {

            SYSTEM.OUT.PRINTLN ("Let's inspect the beans provided by Spring Boot:");

            string[] Beannames = Ctx.getbeandefinitionnames ();
            Arrays.sort (beannames);
            for (String beanname:beannames) {
                System.out.println (beanname);}}

        ;
    }

the website's description of @springbootapplication

Here's what you need to say:

Springboot has now been updated to 1.5.1, and there are differences in the way Application.java annotations are made in 1.4.4;

1.4.4 uses three annotations, using @springbootapplication on the official web site to replace the above three annotations by default. We give priority to the latest

Then the controller file:

Package Com.zhu.controller;

Import org.springframework.web.bind.annotation.RequestMapping;
Import Org.springframework.web.bind.annotation.RestController;

@RestController public
class Hellocontroller {
    @RequestMapping ("/") public
    String Index () {return
        " Greetings from Spring boot! ";
    }
}"

The use of SPRINGMVC should be clear, the way back to the view annotation is @controller, return the data annotation plus @responsebody, but in springboot use @restcontroller combined the two annotations, The data is returned instead of a view.
The official website wrote:

Enter Application.java-–run application
Browser input URL, access

Add Unit Tests
adding dependencies in Pom.xml

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId> spring-boot-starter-test</artifactid>
            <scope>test</scope>
        </dependency>

Path: Src\test\java\com\zhu\hellocontrollertest.java

Package Hello;
Import static org.hamcrest.Matchers.equalTo;
Import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;

Import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
Import Org.junit.Test;
Import Org.junit.runner.RunWith;
Import org.springframework.beans.factory.annotation.Autowired;
Import ORG.SPRINGFRAMEWORK.BOOT.TEST.AUTOCONFIGURE.WEB.SERVLET.AUTOCONFIGUREMOCKMVC;
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;
    @RunWith (springrunner.class) @SpringBootTest @AutoConfigureMockMvc public class Hellocontrollertest {@Autowired

    Private MOCKMVC MVC; @Test public void Gethello () throws Exception {Mvc.perform (Mockmvcrequestbuilders.get ("/"). Accept (MedIatype.application_json)). Andexpect (Status (). IsOk ()). Andexpect (Content (). String (Equalto (
    "Greetings from Spring boot!")); }
}

This mockmvc comes from springtest, compiles the HTTP request through the compiler, and asserts the result. Use @autoconfiguremockmvc and @springboottest to inject the MOCKMVC instance.

You can also use the full stack integration test.

Package Hello;
Import static org.hamcrest.Matchers.equalTo;

Import static org.junit.Assert.assertThat;

Import Java.net.URL;
Import Org.junit.Before;
Import Org.junit.Test;
Import Org.junit.runner.RunWith;
Import org.springframework.beans.factory.annotation.Autowired;
Import Org.springframework.boot.context.embedded.LocalServerPort;
Import Org.springframework.boot.test.context.SpringBootTest;
Import Org.springframework.boot.test.web.client.TestRestTemplate;
Import org.springframework.http.ResponseEntity;

Import Org.springframework.test.context.junit4.SpringRunner; @RunWith (Springrunner.class) @SpringBootTest (webenvironment = SpringBootTest.WebEnvironment.RANDOM_PORT) public

    Class Hellocontrollerit {@LocalServerPort private int port;

    Private URL base;

    @Autowired private testresttemplate template;
    @Before public void SetUp () throws Exception {this.base = new URL ("http://localhost:" + port + "/"); @Test public void Gethello () thrOWS Exception {responseentity<string> response = template.getforentity (Base.tostring (), STR
        Ing.class);
    Assertthat (Response.getbody (), Equalto ("Greetings from Spring boot!")); }
}

The implanted service starts with a random port. After JUnit you will find that the port number is inconsistent with the default ports you set.

congratulations! Built a simple Web application with Spring Boot and learned how it can ramp up your development pace