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Springboot练习-学生教务系统笔记2

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前言:在Springboot练习-学生教务系统笔记1中，初步搭建springboot框架并实现controller与前端页面的访问,这一次将正式开始学生教务系统的开发，加入数据库并使用mybatis实现对数据的CRUD以及controller、service设计

数据库参考

image-20200117000456358

maven依赖

mybatis与spring data jpa

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<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.3.2</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

application.properties

配置文件参考

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server.port=8080
server.servlet.context-path=/orange
spring.thymeleaf.prefix=classpath:/templates/
spring.thymeleaf.suffix=.html
spring.thymeleaf.cache=false

spring.datasource.username=root
spring.datasource.password=orange
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/sms?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

mybatis.mapper-locations=classpath:/mybatis/mapping/*.xml
mybatis.config-location=classpath:/mybatis/config/mybatis-config.xml

mybatis

mybatis-config.xml

mybatis配置参考
仅仅配置了下划线转驼峰

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<?xml version="1.0" encoding="UTF-8" ?> 
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
	<settings>
		<setting name="mapUnderscoreToCamelCase" value="true"/>
	</settings>
</configuration>
包名结构

image.png

mybatis相关文件路径

本次笔记实现了Student 增删改查与界面设计，请忽略Course、Teacher

image.png

image.png

实体类 Student
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/**
 * @author shency
 * @description: 学生实体类
 */
@Table(name = "student")
public class Student {
    /**
     * 学生编号
     */
    @Id
    @Column(name = "student_id")
    private String studentId;

    /**
     * 学生姓名
     */
    @Column(name = "student_name")
    private String studentName;

    /**
     * 学生学号
     */
    @Column(name = "student_number")
    private String studentNumber;

    /**
     * 学生性别
     * 0 male
     * 1 female
     */
    @Column(name = "student_sex")
    private String studentSex;

    /**
     * 学生电话
     */
    @Column(name = "student_phone_number")
    private String studentPhoneNumber;

    /**
     * 学生邮箱
     */
    @Column(name = "student_email")
    private String studentEmail;

    /**
     * 创建时间
     */
    @Column(name = "create_time")
    private Date createTime;

    /**
     * 修改时间
     */
    @Column(name = "modify_time")
    private Date modifyTime;

    /**
     * 入学时间
     */
    @Column(name = "student_enrollment_date")
    private Date studentEnrollmentDate;
    
    /**
     * 省略Getter/Setter方法 或者使用注解
     */

}
StudentDTO
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/**
 * @author shency
 * @description: StudentDTO
 */
public class StudentDTO {
    /**
     * 学生编号
     */
    private String studentId;

    /**
     * 学生姓名
     */
    private String studentName;

    /**
     * 学生学号
     */
    private String studentNumber;

    /**
     * 学生性别
     * 0 male
     * 1 female
     */
    private String studentSex;

    /**
     * 学生电话
     */
    private String studentPhoneNumber;

    /**
     * 学生邮箱
     */
    private String studentEmail;

    /**
     * 入学时间
     */
    private Date studentEnrollmentDate;

    /**
     * 省略Getter/Setter方法 或者使用注解
     */
}
StudentMapper
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<?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.scy.sms.dao.mapper.StudentMapper">
    <resultMap id="studentMap" type="com.scy.sms.dao.entity.Student">
        <id column="student_id" property="studentId" jdbcType="VARCHAR"/>
        <result column="student_name" property="studentName" jdbcType="VARCHAR"/>
        <result column="student_number" property="studentNumber" jdbcType="VARCHAR"/>
        <result column="student_sex" property="studentSex" jdbcType="VARCHAR"/>
        <result column="student_phone_number" property="studentPhoneNumber" jdbcType="VARCHAR"/>
        <result column="student_email" property="studentEmail" jdbcType="VARCHAR"/>
        <result column="create_time" property="createTime" jdbcType="TIMESTAMP"/>
        <result column="modify_time" property="modifyTime" jdbcType="TIMESTAMP"/>
        <result column="student_enrollment_date" property="studentEnrollmentDate" jdbcType="VARCHAR"/>
    </resultMap>
    <sql id="insertKey">
        <trim suffixOverrides=",">
            student_id,
            <if test="studentName != null and studentName != ''">
                student_name,
            </if>
            <if test="studentNumber != null and studentNumber != ''">
                student_number,
            </if>
            <if test="studentSex != null and studentSex != ''">
                student_sex,
            </if>
            <if test="studentPhoneNumber != null and studentPhoneNumber != ''">
                student_phone_number,
            </if>
            <if test="studentEmail != null and studentEmail != ''">
                student_email,
            </if>
            <if test="studentEnrollmentDate != null and studentEnrollmentDate != ''">
                student_enrollment_date,
            </if>
        </trim>
    </sql>

    <sql id="insertValues">
        <trim suffixOverrides=",">
            #{studentId},
            <if test="studentName != null and studentName != ''">
                #{studentName},
            </if>
            <if test="studentNumber != null and studentNumber != ''">
                #{studentNumber},
            </if>
            <if test="studentSex != null and studentSex != ''">
                #{studentSex},
            </if>
            <if test="studentPhoneNumber != null and studentPhoneNumber != ''">
                #{studentPhoneNumber},
            </if>
            <if test="studentEmail != null and studentEmail != ''">
                #{studentEmail},
            </if>
            <if test="studentEnrollmentDate != null and studentEnrollmentDate != ''">
                #{studentEnrollmentDate},
            </if>
        </trim>
    </sql>
    <select id="studentPageQuery" parameterType="map" resultType="com.scy.sms.dto.StudentDTO">
        SELECT
        student_id,
        student_name,
        student_number,
        student_sex,
        student_phone_number,
        student_email,
        create_time,
        modify_time,
        student_enrollment_date
        FROM
        student
        <where>
            <if test="studentId != null and studentId != ''">
                and student_id = #{studentId}
            </if>
            <if test="studentName != null and studentName != ''">
                and student_name = #{studentName}
            </if>
            <if test="studentNumber != null and studentNumber != ''">
                and student_number = #{studentNumber}
            </if>
        </where>
        order by student_id desc
        limit #{offset} , #{limit}
    </select>
    <select id="studentDetailQuery" parameterType="java.lang.String" resultType="com.scy.sms.dto.StudentDTO">
        SELECT
            student_id,
            student_name,
            student_number,
            student_sex,
            student_phone_number,
            student_email,
            create_time,
            modify_time,
            student_enrollment_date
        FROM
            student
        WHERE
            student_id = #{studentId}
    </select>
<!--    <update id="studentUpdate" parameterType="com.scy.smso.StudentDTO">
        update student
        <trim prefix="set" suffixOverrides=",">
            <if test="studentName != null and studentName != ''">
                student_name = #{studentName},
            </if>
            <if test="studentNumber != null and studentNumber != ''">
                student_number = #{studentNumber},
            </if>
            <if test="studentSex != null and studentSex != ''">
                student_sex = #{studentSex},
            </if>
            <if test="studentPhoneNumber != null and studentPhoneNumber != ''">
                student_phone_number = #{studentPhoneNumber},
            </if>
            <if test="studentEmail != null and studentEmail != ''">
                studentEmail = #{studentEmail},
            </if>
            <if test="studentEnrollmentDate != null and studentEnrollmentDate != ''">
                student_enrollment_date = #{studentEnrollmentDate},
            </if>
        </trim>
        where
        student_id = #{studentId,jdbcType=VARCHAR}
    </update>-->
    <update id="studentUpdate" parameterType="com.scy.sms.dto.StudentDTO">
        update student
        <set>
            <if test="studentName != null and studentName != ''">
                student_name = #{studentName},
            </if>
            <if test="studentNumber != null and studentNumber != ''">
                student_number = #{studentNumber},
            </if>
            <if test="studentSex != null and studentSex != ''">
                student_sex = #{studentSex},
            </if>
            <if test="studentPhoneNumber != null and studentPhoneNumber != ''">
                student_phone_number = #{studentPhoneNumber},
            </if>
            <if test="studentEmail != null and studentEmail != ''">
                student_email = #{studentEmail},
            </if>
            <if test="studentEnrollmentDate != null and studentEnrollmentDate != ''">
                student_enrollment_date = #{studentEnrollmentDate},
            </if>
        </set>
        where
        student_id = #{studentId,jdbcType=VARCHAR}
    </update>

    <insert id="studentInsert" parameterType="com.scy.sms.dto.StudentDTO">
        insert into student(<include refid="insertKey"/>)
        values(<include refid="insertValues"/>)
    </insert>

    <delete id="studentDelete" parameterType="com.scy.sms.dto.StudentDTO">
        delete from  student where student_id=#{studentId}
    </delete>
</mapper>

请求类

BaseRequset
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/**
 * @author shency
 * @description: BaseRequset
 */
@Data
public abstract class BaseRequset implements Serializable {

    private static final long serialVersionUID = 985010454743040538L;

    // 请求IP
    public String requestIp;

    // 请求时间
    public String requestTime;

}
BasePageRequest
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/**
 * @author shency
 * @description: BasePageRequest
 */
@Data
@ToString(callSuper = true)
@EqualsAndHashCode(callSuper = true)
public class BasePageRequest extends BaseRequset{
    /**
     * 页码
     */
    private Integer page = 1;

    /**
     * 每页显示条数
     */
    private Integer limit = 10;

    /**
     * 查询开始时间
     */
    public String startTime;

    /**
     * 查询结束时间
     */
    public String endTime;

    @SuppressWarnings("unused")
    private Integer offset;

    public Integer getOffset() {
        return (page - 1) * limit;
    }
}
StudentQueryRequest
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/**
 * @author shency
 * @description: 学生查询操作请求类
 */
@Getter
@Setter
public class StudentQueryRequest extends BasePageRequest {
    /**
     * 学生编号
     */
    private String studentId;

    /**
     * 学生姓名
     */
    private String studentName;

    /**
     * 学生学号
     */
    private String studentNumber;
}
StudentDeleteRequest
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/**
 * @author shency
 * @description: 学生删除操作请求类
 */
@Getter
@Setter
public class StudentDeleteRequest {
    /**
     * 学生编号
     */
    private String studentId;
}
StudentUpdateRequest
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/**
 * @author shency
 * @description: 学生更新操作请求类
 */
@Getter
@Setter
public class StudentUpdateRequest {
    /**
     * 学生编号
     */
    private String studentId;

    /**
     * 学生姓名
     */
    private String studentName;

    /**
     * 学生学号
     */
    private String studentNumber;

    /**
     * 学生性别
     * 0 male
     * 1 female
     */
    private String studentSex;

    /**
     * 学生电话
     */
    private String studentPhoneNumber;

    /**
     * 学生邮箱
     */
    private String studentEmail;

    /**
     * 创建时间
     */
    private Date createTime;
}
StudentInsertRequest
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/**
 * @author shency
 * @description: 学生新增操作请求类
 */
@Getter
@Setter
public class StudentInsertRequest {
    /**
     * 学生编号
     */
    private String studentId;

    /**
     * 学生姓名
     */
    private String studentName;

    /**
     * 学生学号
     */
    private String studentNumber;

    /**
     * 学生性别
     * 0 male
     * 1 female
     */
    private String studentSex;

    /**
     * 学生电话
     */
    private String studentPhoneNumber;

    /**
     * 学生邮箱
     */
    private String studentEmail;

    /**
     * 创建时间
     */
    private Date createTime;
}

CommonResultCodeEnum

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/**
 * @author shency
 * @description: 通用返回结构枚举
 */
public enum CommonResultCodeEnum {
    SUCCESS("000000", "运行成功"),
    SYSTEM_ERROR("999999", "系统错误"),
    QUERY_ERROR("900000", "查询数据错误"),
    INSERT_ERROR("900001", "插入数据错误"),
    DELETE_ERROR("900002", "删除数据错误"),
    UPDATE_ERROR("900003", "更新数据错误"),

    PHONE_NUMBER_ERROR("901000", "电话数据错误");
    private final String code;

    private final String desc;

    public String getCode() {
        return code;
    }

    public String getDesc() {
        return desc;
    }

    CommonResultCodeEnum(String code, String desc) {
        this.code = code;
        this.desc = desc;
    }

    public static CommonResultCodeEnum getResultCode(String code) {
        for (CommonResultCodeEnum resultCode : values()) {
            if (resultCode.getCode().equals(code)) {
                return resultCode;
            }
        }
        return SYSTEM_ERROR;
    }
}

BizException

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/**
 * @author shency
 * @description: 业务层异常类
 */
public class BizException extends RuntimeException implements Serializable {

    private static final long serialVersionUID = -5170146508231708688L;
    private String code;

    private String msg;

    private String detailMessage;

    public BizException() {
        super();
    }

    public BizException(CommonResultCodeEnum resultCode) {
        super();
        this.code = resultCode.getCode();
        this.msg = resultCode.getDesc();
    }

    public BizException(String code, String message) {
        super();
        this.code = code;
        this.msg = message;
    }

    public BizException(CommonResultCodeEnum resultCode, String detailMessage) {
        super();
        this.code = resultCode.getCode();
        this.msg = resultCode.getDesc();
        this.detailMessage = detailMessage;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public void setDetailMessage(String detailMessage) {
        this.detailMessage = detailMessage;
    }

    @Override
    public String getMessage() {
        return StringUtils.isEmpty(detailMessage) ? msg : detailMessage;
    }

    @Override
    public String toString() {
        StringBuffer controlExceptionStr = new StringBuffer();
        controlExceptionStr.append("[BizException]");
        controlExceptionStr.append("code:");
        controlExceptionStr.append(code);
        controlExceptionStr.append(",msg:");
        controlExceptionStr.append(msg);
        controlExceptionStr.append(",detailMessage:");
        controlExceptionStr.append(detailMessage);

        return controlExceptionStr.toString();
    }

}

StudentService

IStudentService
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/**
 * @author shency
 * @description: IStudentService
 */
public interface IStudentService {
    /**
     * 学生分页查询
     */
    ResultModel<List<StudentDTO>> studentPageQuery(StudentPageQueryRequest studentPageQueryRequest);

    /**
     * 学生详情查询
     */
    ResultModel<StudentDTO> studentDetailQuery(String studentId);

    /**
     * 学生更新
     */
    ResultModel<Boolean> studentUpdate(StudentUpdateRequest studentUpdateRequest);

    /**
     * 学生删除
     */
    ResultModel<Boolean> studentDelete(StudentDeleteRequest studentDeleteRequest);

    /**
     * 学生新增
     */
    ResultModel<Boolean> studentInsert(StudentInsertRequest studentInsertRequest);
}
StudentService
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/**
 * @author shency
 * @description: StudentService
 */
@Slf4j
@Service
public class StudentService implements IStudentService {
    @Resource
    private StudentMapper studentMapper;

    /**
     * 学生分页查询
     */
    @Override
    public ResultModel<List<StudentDTO>> studentPageQuery(StudentPageQueryRequest studentPageQueryRequest){

        ResultModel<List<StudentDTO>> result = new ResultModel<List<StudentDTO>>();
        Map<String, Object> params = new HashMap<>();
        params.put("studentId", studentPageQueryRequest.getStudentId());
        params.put("studentName", studentPageQueryRequest.getStudentName());
        params.put("studentNumber", studentPageQueryRequest.getStudentNumber());
        params.put("limit", studentPageQueryRequest.getLimit());
        params.put("offset", studentPageQueryRequest.getOffset());
        try{
            List<StudentDTO> studentList = studentMapper.studentPageQuery(params);
            if (CollectionUtils.isEmpty(studentList)) {
                studentList = new ArrayList<StudentDTO>();
            }
            result.setCount(studentList.size());
            result.setSuccess(studentList);
        }
        catch(Exception e){
            log.info("学生信息分页查询-异常" + e.getMessage());
            e.printStackTrace();
        }

        return result;
    }

    /**
     * 学生详细查询
     */
    @Override
    public ResultModel<StudentDTO> studentDetailQuery(String studentId) {
        ResultModel<StudentDTO> result = new ResultModel<StudentDTO>();
        try{
            StudentDTO studentDTO = studentMapper.studentDetailQuery(studentId);
            result.setCount(1);
            result.setSuccess(studentDTO);
        }
        catch(Exception e){
            log.info("学生信息详情查询-异常" + e.getMessage());
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 更新学生
     */
    @Override
    public ResultModel<Boolean> studentUpdate(StudentUpdateRequest studentUpdateRequest) {
        try{
            StudentDTO studentDTO = new StudentDTO();
            BeanUtils.copyProperties(studentUpdateRequest,studentDTO);
            if (StringUtils.isNotBlank(studentDTO.getStudentPhoneNumber()) && studentDTO.getStudentPhoneNumber().length() != 11) {
                throw new BizException(CommonResultCodeEnum.PHONE_NUMBER_ERROR);
            }
            studentMapper.studentUpdate(studentDTO);
        }catch(Exception e){
            log.info("学生信息更新-异常" + e.getMessage());
            e.printStackTrace();
            return new ResultModel<Boolean>().setSuccess(false);
        }
        return new ResultModel<Boolean>().setSuccess(false);
    }

    /**
     * 删除学生
     */
    @Override
    public ResultModel<Boolean> studentDelete(StudentDeleteRequest studentDeleteRequest) {
        try{
            StudentDTO studentDTO = new StudentDTO();
            BeanUtils.copyProperties(studentDeleteRequest,studentDTO);
            studentMapper.studentDelete(studentDTO);
        }catch(Exception e){
            log.info("学生信息删除-异常" + e.getMessage());
            e.printStackTrace();
            return new ResultModel<Boolean>().setSuccess(false);
        }
        return new ResultModel<Boolean>().setSuccess(false);
    }

    /**
     * 新增学生
     */
    @Override
    public ResultModel<Boolean> studentInsert(StudentInsertRequest studentInsertRequest) {
        try{
            String date = new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date()).toString();
            studentInsertRequest.setStudentId(date+ RandomStringUtils.randomNumeric(6));
            StudentDTO studentDTO = new StudentDTO();
            BeanUtils.copyProperties(studentInsertRequest,studentDTO);
            if (studentDTO.getStudentPhoneNumber().length() != 11) {
                throw new BizException(CommonResultCodeEnum.PHONE_NUMBER_ERROR);
            }
            studentMapper.studentInsert(studentDTO);
        }catch(Exception e){
            log.info("学生信息插入-异常" + e.getMessage());
            e.printStackTrace();
            return new ResultModel<Boolean>().setSuccess(false);
        }
        return new ResultModel<Boolean>().setSuccess(true);
    }
}

StudentController

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/**
 * @author shency
 * @description: StudentController
 */
@Slf4j
@Controller
public class StudentController {
    @Autowired
    private IStudentService studentService;

    @ResponseBody
    @RequestMapping("/student/studentQuery.json")
    public ResultModel<List<StudentDTO>> studentQuery(@RequestBody StudentQueryRequest studentQueryRequest) {
        return studentService.studentMapQuery(studentQueryRequest);
    }

    @ResponseBody
    @RequestMapping("/student/studentInsert.json")
    public ResultModel<Boolean> studentInsert(@RequestBody StudentInsertRequest studentInsertRequest) {
        return studentService.studentInsert(studentInsertRequest);
    }

    @ResponseBody
    @RequestMapping("/student/studentUpdate.json")
    public ResultModel<Boolean> studentUpdate(@RequestBody StudentUpdateRequest studentUpdateRequest) {
        return studentService.studentUpdate(studentUpdateRequest);
    }

    @ResponseBody
    @RequestMapping("/student/studentDelete.json")
    public ResultModel<Boolean> studentDelete(@RequestBody StudentDeleteRequest studentDeleteRequest) {
        return studentService.studentDelete(studentDeleteRequest);
    }
}

BasePageController

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/**
 * @author shency
 * @description: 通用路由页面
 */
@Slf4j
@Controller
public class BasePageController {
    @GetMapping(value = "/index.html")
    public ModelAndView index(HttpServletRequest request, HttpServletResponse response) {
        ModelAndView view = new ModelAndView();
        view.setViewName("index");
        return view;
    }

    @GetMapping(value = "/main.html")
    public ModelAndView main(HttpServletRequest request, HttpServletResponse response) {
        ModelAndView view = new ModelAndView();
        view.setViewName("main");
        return view;
    }

    @GetMapping("/{first}/{second}.html")
    public String page(@PathVariable("first") String first,
                             @PathVariable("second") String second, HttpServletRequest request) {
        String url = first + "/" + second;
        System.out.println(url);
        return url;
    }

    @GetMapping("/{first}/{second}/{third}.html")
    public String page(@PathVariable("first") String first,
                             @PathVariable("second") String second,
                             @PathVariable("third") String third, HttpServletRequest request) {
        String url = first + "/" + second + "/" + third;
        System.out.println(url);
        return url;
    }

}

ResultModel

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/**
 * @author shency
 * @description: Controller层返回结果模型
 */
@Data
public class ResultModel<T> implements Serializable {

    private static final long serialVersionUID = -9090347033463853016L;

    /**
     * 返回数据总数量
     */
    private Integer count;

    /**
     * 接口返回对象
     */
    private T result;

    /**
     * 接口返回code
     */
    private String code;

    /**
     * 接口返回msg
     */
    private String msg;

    public ResultModel() { };

    public ResultModel(String code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    public ResultModel(T result, String msg, String code) {
        this.result = result;
        this.msg = msg;
    }

    public ResultModel<T> setSuccess(T result) {
        this.result = result;
        this.msg = CommonResultCodeEnum.SUCCESS.getDesc();
        this.code = CommonResultCodeEnum.SUCCESS.getCode();
        return this;
    }
}
-------------本文结束感谢您的阅读-------------