spring boot 项目简单搭建

1.创建一个maven项目Spring-boot-demo,，结构如下：

2.配置pom.xml

	4.0.0

	com.example
	spring-boot-demo
	0.0.1-SNAPSHOT
	jar

	spring-boot-demo
	Demo project for Spring Boot

	
		org.springframework.boot
		spring-boot-starter-parent
		2.0.5.RELEASE
		 
	

	
		UTF-8
		UTF-8
		1.8
	

	
		
			org.springframework.boot
			spring-boot-starter-data-jpa
		
		
			org.springframework.boot
			spring-boot-starter-thymeleaf
		
		
			org.springframework.boot
			spring-boot-starter-web
		

		
			com.h2database
			h2
			runtime
		
		
			org.springframework.boot
			spring-boot-starter-test
			test
		
        
		
			org.springframework.boot
			spring-boot-devtools
		
	


	
		
			
				org.springframework.boot
				spring-boot-maven-plugin
                
				
					org.springframework
					springloaded
					1.2.6.RELEASE
				
			
		
	

3.编写启动类SpringbootDemoApplication.java

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

@SpringBootApplication//开启自动扫面和自动配置
public class SpringBootDemoApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringBootDemoApplication.class, args);//负责启动引动应用程序
	}
}

4.编写Controller类

package com.example.demo.controller;

import java.util.HashMap;
import java.util.Map;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * @Controller注解是返回页面，比如hello.html 注意这里不要使用@RestController，这样会导致页面没法展示的问题
 * 如果需要返回Json串，直接在方法上加@ResponseBody即可
 *
 */
@Controller
@RequestMapping("/")
public class HelloController {
	// 获取页面
	@RequestMapping(value = "/hello/view", method = RequestMethod.GET)
	public String hello(Model model) {
		model.addAttribute("msg", "hello thymeleaf!");
		Map map = new HashMap();
		map.put("name", "jack");
		model.addAttribute("map", map);
		return "hello";
	}

	// 获取对象
	@RequestMapping(method = RequestMethod.GET, value = "/map")
	@ResponseBody // 增加注解说明是返回对象
	public Map getJson() {
		System.out.println(">>>>测试/boot/getMap");
		Map map = new HashMap();
		map.put("name", "jack");
		return map;
	}
}

4.编写视图层thymeleaf

	
title
	
	

5.浏览器输入 http://localhost:8080/hello/view

6.可以编写测试类SpringBootDemoApplicationTersts.java

package com.example.demo;

import java.util.Map;

import org.junit.Assert;
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.test.context.junit4.SpringRunner;

import com.example.demo.controller.HelloController;

@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringBootDemoApplicationTests {
	@Autowired
    HelloController helloController;
    @Test
    public void testDemo() {
        Map map = helloController.getJson();
        Assert.assertEquals(map.get("name"), "jack");
    }
	@Test
	public void contextLoads() {
		System.out.println("-----------------------测试类------------------");
	}

}