Spring Boot构建REST

controller

package com.example.demo.controller;

import com.example.demo.pojo.User;
import com.example.demo.utils.ResultUtil;
import org.springframework.web.bind.annotation.*;

import java.util.*;

/* *
 * Created by Ay on 2018/10/26
 */
@RestController
@RequestMapping("/users")
public class UserController {
    //线程安全Map
    static Map<Long,User> users = Collections.synchronizedMap(new HashMap<Long,User>());

    /**
     * /users 的get请求 得到user的列表
     * @return
     */
    @RequestMapping(value = "/",method = RequestMethod.GET)
    public List<User> getUserList(){
        return new ArrayList<User>(users.values());
    }

    /**
     * /users 的post请求 增加user
     * @param user
     * @return
     */
    @RequestMapping(value = "/",method = RequestMethod.POST)
    public Object postUser(@ModelAttribute User user){
        users.put(user.getId(),user);
        return "success";
    }

    /**
     * /users/id  取得id并返回查询的user
     * @param id 要获取的用户id
     * @return
     */
    @RequestMapping(value = "/{id}",method = RequestMethod.GET)
    public User getUser(@PathVariable Long id){
        return users.get(id);
    }

    /**
     * /users/id  更新id的信息
     * @param id
     * @param user
     * @return
     */
    @RequestMapping(value = "/{id}",method = RequestMethod.PUT)
    public Object putUser(@PathVariable Long id,@ModelAttribute User user){
        User u = users.get(id);
        u.setName(user.getName());
        u.setAge(user.getAge());
        return "success";
    }

    /**
     * /users/id 删除user
     * @param id
     * @return
     */
    @RequestMapping(value = "/{id}",method = RequestMethod.DELETE)
    public Object deleteUser(@PathVariable Long id){
        users.remove(id);
        return "success";
    }
}

单元测试

package com.example.demo;

import com.example.demo.controller.UserController;
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.RequestBuilder;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;

import static org.hamcrest.Matchers.equalTo;
import static 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;

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

    private MockMvc mvc;
    @Before
    public void setUp(){
        mvc = MockMvcBuilders.standaloneSetup(new UserController()).build();
    }
    @Test
    public void contextLoads() throws Exception{
        // 测试UserController
        RequestBuilder request = null;

        // 1、get查一下user列表，应该为空
        request = get("/users/");
        mvc.perform(request)
                .andExpect(status().isOk())
                .andExpect(content().string(equalTo("[]")));

        // 2、post提交一个user
        request = post("/users/")
                .param("id", "1")
                .param("name", "测试大师")
                .param("age", "20");
        mvc.perform(request)
                .andExpect(content().string(equalTo("{\"errorCode\":0,\"msg\":\"OK\",\"data\":null}")));

        // 3、get获取user列表，应该有刚才插入的数据
        request = get("/users/");
        mvc.perform(request)
                .andExpect(status().isOk())
                .andExpect(content().string(equalTo("[{\"id\":1,\"name\":\"测试大师\",\"age\":20}]")));

        // 4、put修改id为1的user
        request = put("/users/1")
                .param("name", "测试终极大师")
                .param("age", "30");
        mvc.perform(request)
                .andExpect(content().string(equalTo("success")));

        // 5、get一个id为1的user
        request = get("/users/1");
        mvc.perform(request)
                .andExpect(content().string(equalTo("{\"id\":1,\"name\":\"测试终极大师\",\"age\":30}")));

        // 6、del删除id为1的user
        request = delete("/users/1");
        mvc.perform(request)
                .andExpect(content().string(equalTo("success")));

        // 7、get查一下user列表，应该为空
        request = get("/users/");
        mvc.perform(request)
                .andExpect(status().isOk())
                .andExpect(content().string(equalTo("[]")));

    }



}