Mybatis-plus的使用

接口mapper需要继承BaseMapper<要操作的类>外加@Mapper

mport org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import java.util.List;
@Mapper
public interface AdminUserMapper extendsBaseMapper<AdminUserEntity> {

AdminUserEntity：

@TableName("openapi_admin_user")
@Data
public class AdminUserEntity extends BaseEntity {
    @TableId("user_id")
    private Long userId;
    private String userName;
    private String userPassword;
    private String userType;
    private String status;
    private String telephone;
    private String isInitPwd;
    private Long renterId;

    /**
     *  登录用户 及新增用户的创建人
     */
    private String createBy;

BaseEntity：

@Data
@ApiModel("基础实体类")
public abstract class BaseEntity {

    @ApiModelProperty(value = "创建人")
    private String createBy;

    @ApiModelProperty(value = "更新人")
    private String updateBy;

    @ApiModelProperty(value = "更新时间")
    @JsonSerialize(using = JsonDateSerializer.class)
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date dateUpdated;

    @ApiModelProperty(value = "创建时间")
    @JsonSerialize(using = JsonDateSerializer.class)
    @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private Date dateCreated;

}

 1：如果有涉及到输入框的查询时，分页

Controller:

@ApiOperation("查询角色列表")
@PostMapping("/list")
public ResponseDto<Page<RoleResponse>> listRoles(@RequestBody @Valid PageWrapper<RoleRequest> pageRequest) {
    log.info("/roles/list start");
    log.info("【/roles/list】调用roleService层入参: " + pageRequest);
    Page page = new Page(pageRequest.getCurrent(), pageRequest.getSize());
    if(pageRequest.getDataBody() == null) {
        throw new ServiceException(ResponseCode.ValidationError.getCode(), "缺少参数dataBody");
    }
    Page<RoleResponse> list = roleService.selectRoleListByCondition(page, pageRequest.getDataBody());
    log.info("/roles/list end");
    return ResponseUtil.success(list);

}

PageWrapper:

 */
@Data
public class PageWrapper<T> {
    @NumberFormat
    private int current = 1;
    private int size = 10;
    private int total;
    private int pages;

    @Valid
    private T dataBody;
}

Repository:（无排序）

*/
public Page<RoleResponse> selectRoleListByCondition(Page pageRequest, RoleRequest request) {
    List<RoleResponse> responseList = new ArrayList<>(0);

    Pagination page = getPageParam(pageRequest);

    // condition
    RoleEntity param = new RoleEntity();
    EntityWrapper<RoleEntity> wrapper = new EntityWrapper<>(param);
    wrapper.like(StringUtils.isNotBlank(request.getRoleName()), "aa.role_name", request.getRoleName());
    wrapper.ge(request.getStart() != null, "aa.date_created", request.getStart() + " 00:00:00");
   /* if (StringUtils.isNotEmpty(request.getEnd())) {
        wrapper.le("aa.date_updated", request.getEnd() + " 23:59:59");
    }*/
    wrapper.le(request.getEnd() != null,"aa.date_created", request.getEnd() + " 23:59:59");
    wrapper.eq(request.getRoleId() != null, "aa.role_id", request.getRoleId());
    log.info("selectRoleListByCondition:: {}", wrapper.getSqlSegment());

    List<RoleResponse> entities = null;
    try {
        // 查询角色列表
        entities = roleMapper.selectRolesByPage(page, wrapper);
        if (CollectionUtils.isEmpty(entities)) {
            log.warn("No roles were found.");
            return buildResponse(page, responseList);
        }

private Page<RoleResponse> buildResponse(Pagination page, List<RoleResponse> responses) {
    Page<RoleResponse> result = new Page<>(page.getCurrent(), page.getSize());
    result.setRecords(responses);
    result.setTotal(page.getTotal());
    return result;
}

Repository(排序)：

public List<UserResponse> listUsers(UserRequest request) {
    AdminUserEntity userEntity = new AdminUserEntity();
    EntityWrapper<AdminUserEntity> ew = new EntityWrapper<>(userEntity);
    ew.eq("status", CommonFlagEnum.Yes.getCode()).eq(StringUtils.isNotBlank(request.getCompanyName()),
            "company_name", request.getCompanyName()).eq(StringUtils.isNotBlank(request.getUserType()),
            "user_type", request.getUserType()).eq(StringUtils.isNotBlank(request.getUserName()),
            "um_id", request.getUserName()).like(StringUtils.isNotBlank(request.getUserName()),
            "user_name", request.getUserName());
    //排序列
    List<String> orderColumns = new ArrayList<>();
    orderColumns.add("date_created");

    ew.orderDesc(orderColumns);
    log.info("sql: {}, {}", ew.getSqlSelect(), ew.getSqlSegment());

    try {
        List<AdminUserEntity> entities = userMapper.selectList(ew);

Mapper:

      

List<RoleResponse> selectRolesByPage(Pagination pagination, @Param("ew") Wrapper<RoleEntity> wrapper);

xml:

<select id="selectRolesByPage" resultType="com.paic.ocss.gateway.model.dto.role.RoleResponse">
    SELECT
    aa.role_id,
    aa.role_name,
    aa.STATUS,
    aa.date_created,
    aa.create_by,
    aa.date_updated,
    aa.update_by,
    aa.role_desc,
    bb.resource_ids
    FROM
    openapi_admin_role aa
    LEFT JOIN ( SELECT GROUP_CONCAT( r.resource_id ) resource_ids, r.role_id FROM
    openapi_admin_role_resource_mapping r GROUP BY r.role_id ) bb ON aa.role_id = bb.role_id
    <where>
        ${ew.sqlSegment}
    </where>
    order by date_created desc

</select>

2:如果没有涉及到输入框的查询时，分页,而是简单的增，删，改，查：

public void modify(UserModify userRequest) {

    AdminUserEntity userEntity = new AdminUserEntity();
    userEntity.setUserId(userRequest.getUserId());
    if (StringUtils.isNotBlank(userRequest.getTelephone())) {
        userEntity.setTelephone(userRequest.getTelephone());
    }
    if (StringUtils.isNotBlank(userRequest.getUserName())) {
        userEntity.setUserName(userRequest.getUserName());
    }
    if (StringUtils.isNotBlank(userRequest.getStatus())) {
        userEntity.setStatus(userRequest.getStatus());
    }
    if (userRequest.getRenterId() != null) {
        userEntity.setRenterId(userRequest.getRenterId());
    }

    String loginAccount = SecurityUtils.getSubject().getPrincipal().toString();
    userEntity.setUpdateBy(loginAccount);

    if (CommonFlagEnum.Yes.getCode().equals(userRequest.getIsInitPwd())) {
        //存储到db的密码
        userEntity.setUserPassword(SHA256Util.getSHA256StrJava(DEFAULT_PASSWORD));
    } else if(userRequest.getUserPassword() != null){
        userEntity.setUserPassword(SHA256Util.getSHA256StrJava(userRequest.getUserPassword()));
    }
    //SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
    //userEntity.setDateUpdated(format.format(new Date()));
    userEntity.setDateUpdated(new Date());

    try {
        int count = userMapper.updateById(userEntity);