[开发测试]项目实训-智能创新引导工具(2)

一、测试工具安装

postman安装地址：Download Postman

测试结果：

二、完善结构

增加service层，UserService.java，编写save方法根据user的id是否为空执行新增或者修改

@Service
public class UserService {

    @Autowired
    private UserMapper userMapper;

    public int save(User user) {
        if (user.getId() == null) {  // user没有id，则表示是新增
            return userMapper.insert(user);
        } else { // 否则为更新
            return userMapper.update(user);
        }
    }

}

UserMapper.java，新增插入用户数据的方法，定义修改用户数据方法并在xml中编写sql

@Mapper
public interface UserMapper {

    @Select("SELECT * from user")
    List<User> findAll();

    @Insert("INSERT into user(username, password,nickname,email,phone,sex,profilepic) VALUES (#{username}, #{password}," +
            " #{nickname}, #{email},#{phone}, #{sex},#{profilepic})")
    int insert(User user);

    int update(User user);

    @Delete("delete from user where id = #{id}")
    Integer deleteById(@Param("id") Integer id);

}

在resources文件夹下新建mapper文件夹，新建User.xml，进行动态sql编写；安装mybatisx插件，方便在mapper文件与xml文件对应方法之间进行跳转

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.springboot.mapper.UserMapper">

    <update id="update">
        update user
        <set>
            <if test="username != null">
                username = #{username},
            </if>
            <if test="nickname != null">
                nickname = #{nickname},
            </if>
            <if test="email != null">
                email = #{email},
            </if>
            <if test="phone != null">
                phone = #{phone},
            </if>
            <if test="address != null">
                address = #{address}
            </if>
            <if test="sex != null">
                sex = #{sex}
            </if>
        </set>
        <where>
            id = #{id}
        </where>
    </update>

</mapper>

UserController.java，新增接口：传入user对象，将其插入用户表或修改用户表

@RestController
@RequestMapping("/user")
public class UserController {


    @Autowired
    private UserMapper userMapper;

    @Autowired
    private UserService userService;

    // 新增和修改
    @PostMapping
    public Integer save(@RequestBody User user) {
        return userService.save(user);
    }

    // 查询所有数据
    @GetMapping
    public List<User> index() {
        List<User> all = userMapper.findAll();
        return all;
    }

    @DeleteMapping("/{id}")
    public Integer delete(@PathVariable Integer id) {
        return userMapper.deleteById(id);
    }
}

其中测试新接口时报错：Invalid bound statement (not found): com.example.springboot.mapper.UserMapper.update

错因：未在配置文件中扫描新建的xml

将配置文件application.properties重命名为application.yml，格式更加美观：

server:
  port: 9090

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/creative_tool?serverTimezone=GMT%2b8
    username: root
    password: 123456
mybatis:
  mapper-locations: classpath:mapper/*.xml  #扫描所有mybatis的xml文件