Spring Boot1入门例子

拼搏现实的明天。 2022-05-22 07:19 233阅读 0赞

本文使用Spring Boot1.5.8版本，代码下载地址：  
[springboot1入门例子][springboot1]

首先官网就提供初始的项目构建，不过自己创建也很简单。  
最终项目目录如下图所示：  
![这里写图片描述][70]

# 创建Maven工程 #

pom.xml如下所示：

<?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>
    
        <groupId>com.wu.demo</groupId>
        <artifactId>springboot</artifactId>
        <version>1.0-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>springboot</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.8.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>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
    
            <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>

# 按照上面的目录创建Application和HelloWorldController #

代码如下：

package com.wu.demo.springboot;
    
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.SpringApplication;
    
    @SpringBootApplication
    public class Application { 
    
        public static void main(String[] args) {
            SpringApplication.run(Application.class, args);
        }
    }

package com.wu.demo.springboot.web;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    public class HelloWorldController {
    
        @RequestMapping("/hello")
        public String index(){
            return "Hello World!";
        }
    }

# 启动Application #

以debug模式启动Application，浏览器访问[http://localhost:8080/hello][http_localhost_8080_hello]  
在idea中，修改代码后，Ctrl+F9可以实现热部署，直接刷新浏览器即可看到修改后的变化。

# 测试 #

测试代码如下：

package com.wu.demo.springboot.test;
    
    import com.wu.demo.springboot.Application;
    import com.wu.demo.springboot.web.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.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.hamcrest.Matchers.equalTo;
    import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
    import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
    
    @RunWith(SpringJUnit4ClassRunner.class)
    @SpringBootTest(classes = Application.class)
    @WebAppConfiguration
    public class ControllerTests {
        private MockMvc mockMvc;
    
        @Before
        public void setUp() throws Exception{
            mockMvc = MockMvcBuilders.standaloneSetup(new HelloWorldController()).build();
        }
    
        @Test
        public void helloWorldController() throws Exception{
            mockMvc.perform(MockMvcRequestBuilders.get("/hello").accept(MediaType.APPLICATION_JSON))
                    .andExpect(status().isOk())
                    .andExpect(content().string(equalTo("Hello World!")));
        }
    }

参考资料：[springboot(一)：入门篇][springboot]

[springboot1]: https://download.csdn.net/download/wu_boy/10570778
[70]: /images/20220522/eb2d3f8a096c4052b5c8a9df7f0915e0.png
[http_localhost_8080_hello]: http://localhost:8080/hello
[springboot]: http://www.ityouknow.com/springboot/2016/01/06/spring-boot-quick-start.html