1.Devtools

1.1 体验Devtools

1)pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.yl</groupId>
    <artifactId>devtools</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>devtools</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>11</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2)测试，没改之前访问接口

3)改动代码后，不用重启项目只需编译一下项目就发现服务会自动重启，注意：devtools只会在dev时才有效

1.2.静态资源修改后，重启项目的配置

1）在application.properties文件中加入这行即可

1.2.禁用自动重启

1）在application.properties配置

2）或者在启动类加

1.2.Trigger控制重启行为

1）加上这行配置

2）再新建一个.reloadTrigger的文本文件，里面什么内容都可以，原理就是这个文本的内容一旦发生改变，项目就会重启

2.单元测试

2.1 单元测试简介

1）单元测试的依赖是在创建项目时，默认就加入的

2）其核心模块就是这两个

2.2 Spring Boot Mock测试

1)实体类

package com.yl.test.domain;

import java.io.Serializable;

public class User implements Serializable {
    private Integer id;
    private String username;
    private String password;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

2）controller

package com.yl.test.controller;

import com.yl.test.domain.User;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserController {

    @GetMapping("/user/{id}")
    public User getUserById(@PathVariable Integer id) {
        User user = new User();
        user.setId(id);
        user.setUsername("root");
        user.setPassword("123");
        return user;
    }
}

3)测试，调用controller的get请求

package com.yl.test;

import com.yl.test.controller.UserController;
import com.yl.test.dao.UserDao;
import com.yl.test.domain.User;
import com.yl.test.service.UserService;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.http.MediaType;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MockMvcBuilder;
import org.springframework.test.web.servlet.RequestBuilder;
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;

/**
 * webEnvironment:指定web应用环境
 *
 * -MOCK 虚拟的servlet环境
 * -RANDOM_PORT 随机端口，提供一个真正的servlet环境
 * -DEFINED_PORT 默认端口，提供一个真正的servlet环境
 * -NONE 不提供web环境
 *
 * classes:指定应用启动类
 */
@SpringBootTest
class TestApplicationTests {

    @Autowired
    WebApplicationContext webApplicationContext;
    MockMvc mockMvc;

    //获取mockMvc实例
    @BeforeEach
    void setUp() {
        mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
        mockMvc = MockMvcBuilders.standaloneSetup(new UserController()).build();
    }

    @Test
    void contextLoads() throws Exception {
        //发送get请求
        mockMvc.perform(MockMvcRequestBuilders.get("/user/12").accept(MediaType.APPLICATION_JSON_UTF8))
                .andExpect(MockMvcResultMatchers.status().isOk())
                .andExpect(MockMvcResultMatchers.content().string("{\"id\":12,\"username\":\"root\",\"password\":\"123\"}"))
                .andDo(MockMvcResultHandlers.print());
    }

}

结果

2.3 Spring Boot @MockBean模拟数据测试

1）dao

package com.yl.test.dao;

import com.yl.test.domain.User;
import org.springframework.stereotype.Repository;

@Repository
public class UserDao {

    public User getUserById(Integer id) {
        User user = new User();
        user.setId(id);
        user.setUsername("root");
        user.setPassword("root");
        return user;
    }
}

2）service

package com.yl.test.service;

import com.yl.test.dao.UserDao;
import com.yl.test.domain.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserService {

    @Autowired
    UserDao userDao;

    public User getUserById(Integer id) {
        return userDao.getUserById(id);
    }
}

3）测试，发现获取到的user对象并不是userDao提供的，而是MockBean模拟提供的