宣告，使用 maven3.5.4，springboot2.0，JDK8 ，idea2018.2

模組目錄結構：

main 主方法：

@SpringBootApplication
public class WebApplication {
	public static void main(String[] args) {
		SpringApplication.run(WebApplication.class, args);
	}
}

model實體類：

/**
 * @auther SyntacticSugar
 * @data 2018/11/11 0011下午 10:03
 */
 

public class User {
    private String name;
    private int age;
    private String pass;
    //   getter  setter   
.....
}

controller層，定義了單個物件，list集合，以及傳參情況下的 get 、post請求；

package com.neo.springbootweb.web;
/**
 * @auther SyntacticSugar
 * @data 2018/11/11 0011下午 10:04
 */

//  bug一次，   @controller需要配合@requestbody
 


@RestController
public class WebController {

    //  定義method   、 path

    @RequestMapping(name = "/getUser", method = RequestMethod.POST)
    public User getUser() {
        User user = new User();
        user.setAge(12);
        user.setName("小明");
        user.setPass("123456");
        return user;
 

    }

    //  getUsers  獲取list  集合

    @RequestMapping(value = "/getUsers",method = RequestMethod.POST)
    public List<User> getUsers() {
        ArrayList<User> users = new ArrayList<>();

        User user1 = new User();
        user1.setName("neo");
        user1.setAge(30);
        user1.setPass("neo123");
        users.add(user1);
        User user2 = new User();
        user2.setName("小明");
        user2.setAge(12);
        user2.setPass("123456");
        users.add(user2);

        return  users;
    }

    /**
     *     以下兩種方式都可以；@GetMapping("get/{name}") 簡化寫法
     * @param name
     * @return
     */
//    @RequestMapping(value = "get/{name}",method = RequestMethod.GET)
    @GetMapping("get/{name}")
    public  String   getname(@PathVariable("name") String name ){
        return  name;
    }
}

test方法,前兩個單元測試 返回 json格式的字串，controller層第三個方法測試，在瀏覽器 url 訪問；http://localhost:8080/get/hello
返回hello說明成功：

package com.neo.springbootweb;

import com.neo.springbootweb.web.WebController;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;

@RunWith(SpringRunner.class)
@SpringBootTest
public class WebApplicationTests {

//MockMvcBuilders.standaloneSetup(...) 中的引數需要匯入 controller的例項
    private MockMvc mockMvc;
    @Before
    public void  setUp(){
        mockMvc= MockMvcBuilders.standaloneSetup(new WebController()).build();
    }
    /**
     * .andReturn().getResponse().getContentAsString()
     * 獲取請求的返回資訊
     * @throws Exception
     */
    @Test
    public void getUser() throws Exception {
        String contentAsString = mockMvc.perform(MockMvcRequestBuilders.post("/getUser")).andReturn().getResponse().getContentAsString();
        System.out.println(contentAsString);
    }
    @Test
    public void getUsers() throws Exception {
        String contentAsString = mockMvc.perform(MockMvcRequestBuilders.post("/getUsers")).andReturn().getResponse().getContentAsString();
        System.out.println(contentAsString);
    }
}