springboot-hello 入门案例

Author: niumoo

springboot-hello/.gitignore

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+/target/
+/.mvn/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/build/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/

springboot-hello/pom.xml

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+<?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>net.coding</groupId>
+    <artifactId>springboot-hello</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>springboot-hello</name>
+    <description>springboot-hello</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.1.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <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>

springboot-hello/src/main/java/net/coding/boot/HelloApplication.java

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+package net.coding.boot;
+
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+
+import java.util.Arrays;
+
+@SpringBootApplication
+public class HelloApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(HelloApplication.class, args);
+    }
+
+    @Bean
+    public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
+        return args -> {
+            // 开始检查spring boot 提供的 beans
+            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);
+            }
+        };
+    }
+}

springboot-hello/src/main/java/net/coding/boot/controller/HelloController.java

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+package net.coding.boot.controller;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * <p>
+ *
+ * @Author niujinpeng
+ * @Date 2018/12/4 14:41
+ */
+@RestController
+public class HelloController {
+
+    @RequestMapping("/")
+    public String index() {
+        return "Greetings from Spring Boot!";
+    }
+
+}

springboot-hello/src/main/resources/application.properties

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+server.port=8080

springboot-hello/src/test/java/net/coding/boot/HelloApplicationTestBySpringBoot.java

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+package net.coding.boot;
+
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import java.net.URL;
+
+/**
+ * <p>
+ * 嵌入式服务器由随机端口启动webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT
+ * 并且在运行时发现实际端口@LocalServerPort
+ *
+ * @Author niujinpeng
+ * @Date 2018/12/4 15:02
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class HelloApplicationTestBySpringBoot {
+
+    @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(), String.class);
+        assert (response.getBody().equals("Greetings from Spring Boot!"));
+    }
+
+}

springboot-hello/src/test/java/net/coding/boot/HelloApplicationTests.java

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+package net.coding.boot;
+
+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;
+
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+/**
+ * 单元测试
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest
+@AutoConfigureMockMvc
+public class HelloApplicationTests {
+
+    @Autowired
+    private MockMvc mvc;
+
+    @Test
+    public void testGetHello() throws Exception {
+        mvc.perform(MockMvcRequestBuilders.get("/").accept(MediaType.APPLICATION_JSON))
+                .andExpect(status().isOk())
+                .andExpect(content().string("Greetings from Spring Boot!"));
+    }
+
+}