源码展示：
原来的controller类：

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.*;@RestController
@RequestMapping("/web")
@Slf4j
@Service
public class WebController {@RequestMapping("/get")public String get(){log.info("get");return "get";}@PostMapping("/post")public String post(@RequestBody Student student){log.info("post method student={}",student );return "post success";}@PostMapping("/postHead")public String postHead(@RequestHeader("token") String token){log.info("token : "+token);return "post head token:"+token;}}

自己定义的一个测试对象student：

import lombok.Data;@Data
public class Student {private String name;private int age;
}

测试代码：

package org.qjg.controller;import cn.hutool.core.lang.Assert;
import com.alibaba.fastjson.JSON;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.context.WebApplicationContext;import javax.annotation.Resource;
import java.nio.charset.StandardCharsets;@Slf4j
@SpringBootTest
class WebControllerTest {private MockMvc mockMvc;private HttpHeaders headers;@Resourceprivate WebApplicationContext webApplicationContext;private String baseUrl = "/web";@BeforeEachpublic void init() {mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();MultiValueMap<String, String> map = new LinkedMultiValueMap<>();//或者使用普通的map也是可以的map.add("token", "qjg-token");headers = new HttpHeaders();headers.putAll(map);;}@SneakyThrows@Testvoid get() {MvcResult mvcResult = mockMvc.perform(MockMvcRequestBuilders.get(baseUrl + "/get").headers(headers).contentType(MediaType.APPLICATION_JSON)).andExpect(MockMvcResultMatchers.status().isOk()).andReturn();String contentAsString = mvcResult.getResponse().getContentAsString(StandardCharsets.UTF_8);log.info("contentAsString： " + contentAsString);}@SneakyThrows@Testvoid post() {Student student = new Student();student.setAge(18);student.setName("张三");MvcResult mvcResult = mockMvc.perform(MockMvcRequestBuilders.post(baseUrl + "/post").contentType(MediaType.APPLICATION_JSON).content(JSON.toJSONString(student)).headers(headers)).andExpect(MockMvcResultMatchers.status().isOk()).andReturn();String contentAsString = mvcResult.getResponse().getContentAsString(StandardCharsets.UTF_8);log.info("contentAsString： " + contentAsString);}@SneakyThrows@Testvoid postHead() {MvcResult mvcResult = mockMvc.perform(MockMvcRequestBuilders.post(baseUrl + "/postHead").contentType(MediaType.APPLICATION_JSON).content("").headers(headers)).andExpect(MockMvcResultMatchers.status().isOk()).andReturn();String contentAsString = mvcResult.getResponse().getContentAsString(StandardCharsets.UTF_8);Assert.isTrue("post head token:qjg-token".equals(contentAsString));}
}