1  spring-boot-starter-test内置mockito，添加pom依赖

org.springframework.boot spring-boot-starter-test test

2 示例controller

package com.shangcg.controller;

import javax.servlet.http.HttpServletRequest;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
* @version v1.0
* @Description: junit和mock单元测试示例
* @Author: shangcg
* @Date: 2019/12/24
*/

@RestController
public class UnitDemoController {

@RequestMapping(value = "/hello.json", method = RequestMethod.GET)  
public String getListTag(HttpServletRequest request,  
                         @RequestParam(value = "name", required = false, defaultValue = "0") String name) {  
    try {  
        return "hello :" + name;  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
    return "hello everyone !";  
}

@RequestMapping(value = "/save.json", method = RequestMethod.POST)  
public String saveTag(HttpServletRequest request,  
                      @RequestParam(value = "name", required = true) String name,  
                      @RequestParam(value = "level", required = true) Integer level) {  
    try {  
        return "recive your param " + "name: " + name + " level: " + level;  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
    return null;  
}  

}

3 示例测试类

package com.shangcg.controller;

import static org.junit.Assert.*;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.http.MediaType;
import org.springframework.test.context.junit4.SpringRunner;
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.MockMvcResultHandlers;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;

/**
* @version v1.0
* @Description: TODO
* @Author: shangcg
* @Date: 2019/12/24
*/

@RunWith(SpringRunner.class)
@SpringBootTest
@AutoConfigureMockMvc
public class UnitDemoControllerTest {

@Autowired  
private WebApplicationContext webApplicationContext;  
private MockMvc mockMvc;

@Before  
public void setUp() {  
    mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();//建议使用这种  
}

@Test  //对get方法的测试  
public void testGetListTag() throws Exception {

    MvcResult mvcResult = mockMvc.perform(  
            MockMvcRequestBuilders.get("/hello.json")  
                    .contentType(MediaType.APPLICATION\_JSON).characterEncoding("utf-8")  
                    .param("name", "shangcg")  
    ).andExpect(MockMvcResultMatchers.status().isOk())  
            .andDo(MockMvcResultHandlers.print())  
            .andReturn();

    String content = mvcResult.getResponse().getContentAsString();  
    Assert.assertEquals("hello :shangcg", content);  
}

@Test //对post测试  
public void saveTag() throws Exception {

    MvcResult mvcResult = mockMvc.perform(  
            MockMvcRequestBuilders.post("/save.json")  
                    .contentType(MediaType.APPLICATION\_JSON)  
                    .param("name", "shangcg")  
                    .param("level", "1")  
    ).andExpect(MockMvcResultMatchers.status().isOk())  
            .andDo(MockMvcResultHandlers.print())  
            .andReturn();  
    String content = mvcResult.getResponse().getContentAsString();  
    Assert.assertEquals("recive your param name: shangcg level: 1", content);  
}  

}

4 返回结果

5 因示例项目代码较多没法上传，需要源码请留言