Spring boot 的java配置方式是通過@Configuration和@Bean這兩個注解實作的:
@Configuation作用于類上,想象當于一個xml配置檔案,
@Bean作用于方法上,相當于xml配置中的
第一步:先建立一個maven項目
第二步:建構pom,這下面和parent和web是建構一個boot項目必須的
<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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
</parent>
<groupId>cn.itcast.springboot</groupId>
<artifactId>itcast-springboot</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>war</packaging>
<dependencies>
<!-- springboot支援 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<!-- 連接配接池 -->
<dependency>
<groupId>com.jolbox</groupId>
<artifactId>bonecp-spring</artifactId>
<version>0.8.0.RELEASE</version>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
<plugins>
<!-- 資源檔案拷貝插件 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<configuration>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<!-- java編譯插件 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!-- 配置Tomcat插件 -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
第三步:寫一個Controller
@Controller
@SpringBootApplication
@Configuration
public class HelloApplication {
@RequestMapping("helloworld")
@ResponseBody
public String hello(){
return "hello world!";
}
public static void main(String[] args) {
SpringApplication.run(HelloApplication.class, args);
}
}
1、@SpringBootApplication:Spring Boot項目的核心注解,主要目的是開啟自動配置。;
2、@Configuration:這是一個配置Spring的配置類;
3、@Controller:标明這是一個SpringMVC的Controller控制器;
4、main方法:在main方法中啟動一個應用,即:這個應用的入口;
運作的話直接右鍵java Application就行,然後localhost:8080/helloworld