Spring Boot 入门实例demo

环境：idea + Maven + Spring Boot

1.项目结构：

项目结构.png

2.pom文件：

<?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">


    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.7.RELEASE</version>
        <relativePath/>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>
 

    <modelVersion>4.0.0</modelVersion>
    <artifactId>lance-spring-demo-provider</artifactId>
    <packaging>war</packaging>

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


    </dependencies>


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


</project>

3.主类

package com.lance.spring.boot.demo.controller;

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

@SpringBootApplication
public class SpringBootDemoMain {

    public static void main(String[] args) {

        SpringApplication.run(SpringBootDemoMain.class, args);


    }
}

4.Controller类

package com.lance.spring.boot.demo.controller;

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

@RestController
public class SpringDemoController {

    @RequestMapping("/hello")
    public String hello() {
        return "Hello World!";
    }
}

5.项目启动

项目启动.png

6.输出结果：

输出结果.png

7.单元测试

package com.lance.spring.boot.demo.controller;

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.SpringJUnit4ClassRunner;
import org.springframework.test.context.web.WebAppConfiguration;
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.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
import static org.hamcrest.Matchers.equalTo;
import java.util.HashMap;
import java.util.Map;

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = SpringBootDemoMain.class)
@WebAppConfiguration
public class SpringDemoControllerTest {


    private MockMvc mvc;

    @Before
    public void setUp() {
        mvc = MockMvcBuilders.standaloneSetup(new SpringDemoController()).build();
    }

    @Test
    public void hello() throws Exception{

// get测试
     mvc.perform(MockMvcRequestBuilders.get("/hello").accept(MediaType.APPLICATION_JSON).param("id", "31")).andExpect(status().isOk()).andExpect(content().string(equalTo("Hello World!")));

// post

        Map body = new HashMap<>();
        MvcResult mvcResult =
                mockMvc.perform(MockMvcRequestBuilders.post("/hello").accept(MediaType.APPLICATION_JSON).contentType(MediaType.APPLICATION_JSON).content(JSON.toJSONString(body))).
        andExpect(MockMvcResultMatchers.status().isOk()).andDo(MockMvcResultHandlers.print())
                .andReturn();
 
        log.info("mvcResult:{}",mvcResult.getResponse().getContentAsString());

    }
}