[springboot]idea搭建项目(二)

快来打我* 2022-05-12 07:00 310阅读 0赞

## 1利用idea搭建springboot ##

![创建一个新的项目][70]

![这里写图片描述][70 1]  
![这里写图片描述][70 2]

![这里写图片描述][70 3]

![这里写图片描述][70 4]

![这里写图片描述][70 5]

![这里写图片描述][70 6]

![这里写图片描述][70 7]

## 2.删除掉无用的pom.xml (注意版本问题) ##

<?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.dongshuo</groupId>
       <artifactId>springboottest</artifactId>
       <version>0.0.1-SNAPSHOT</version>
       <packaging>jar</packaging>
    
       <name>springboottest</name>
       <description>Demo project for Spring Boot</description>
    
       <parent>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter-parent</artifactId>
          <version>1.5.2.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-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>

## 3.编写经典的helloworld 测试是否能正确启动 ##

@RestController
    @RequestMapping("/test")
    public class HelloWordController { 
    
        @RequestMapping("/hello")
        public String printHello() {
            return "hello world !";
        }
    }
    @RestController的意思就是controller里面的方法都以json格式输出，不用再写什么jackjson配置的了
    @SpringBootApplication开启了Spring的组件扫描和springboot的自动配置功能，相当于将以下三个注解组合在了一起
    （1）@Configuration：表名该类使用基于Java的配置,将此类作为配置类
    （2）@ComponentScan：启用注解扫描
    （3）@EnableAutoConfiguration：开启springboot的自动配置功能

结果显示:![这里写图片描述][70 8]

## 4.单元测试 ##

@RunWith(SpringRunner.class)
      @SpringBootTest
    public class HelloWorldControlerTests { 
        private MockMvc mvc;
        @Before
        public void setUp() throws Exception {
            mvc = MockMvcBuilders.standaloneSetup(new HelloWorldController()).build();
        }
        @Test
        public void getHello() throws Exception {
        mvc.perform(MockMvcRequestBuilders.get("/hello").accept(MediaType.APPLICATION_JSON))
                    .andExpect(MockMvcResultMatchers.status().isOk())
                    .andDo(MockMvcResultHandlers.print())
                    .andReturn();
        }
    }

## 5.调试 ##

需要添加以下内容,修改内容实时生效,该模块在完整的打包下会被禁用.如果你使用java-jar启动项目或用特定的classloader启动,它会认为这是一个"生产环境"
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
       </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                </configuration>
            </plugin>
       </plugins>
    </build>

[70]: /images/20220512/ea6b7d2d2cf34276b09f427367834d0e.png
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