一、数据库设计

1、数据库

edu_comment

2、数据表

guli_edu.sql

二、创建课程评论接口

1、在service-edu模块，生成课程评论代码

（1）使用mp代码生成器生成

2、在service-ucenter模块，创建接口

（1）实现用户id获取用户信息，返回用户信息对象

//根据token字符串获取用户信息
@PostMapping("getInfoUc/{id}")
public com.atguigu.commonutils.vo.UcenterMember getInfo(@PathVariable String id) {
        //根据用户id获取用户信息
        UcenterMember ucenterMember = memberService.getById(id);
        com.atguigu.commonutils.vo.UcenterMember memeber = new com.atguigu.commonutils.vo.UcenterMember();
        BeanUtils.copyProperties(ucenterMember,memeber);
        return memeber;
}

3、创建课程评论controller

（1）在service-edu模块创建client，实现微服务调用

@Component
@FeignClient(name="service-ucenter",fallback = UcenterClientImpl.class)
public interface UcenterClient {
    //根据用户id获取用户信息
    @GetMapping("/ucenterservice/member/getUcenterPay/{memberId}")
    public UcenterMemberPay getUcenterPay(@PathVariable("memberId") String memberId);
}
@Component
public class UcenterClientImpl implements UcenterClient {
    @Override
    public UcenterMemberPay getUcenterPay(String memberId) {
        return null;
    }
}

（2）创建评论列表和添加评论接口

@RestController
@RequestMapping("/eduservice/comment")
@CrossOrigin
public class CommentFrontController {
    @Autowired
    private CommentService commentService;
    @Autowired
    private UcenterClient ucenterClient;
    //根据课程id查询评论列表
    @ApiOperation(value = "评论分页列表")
    @GetMapping("{page}/{limit}")
    public R index(
            @ApiParam(name = "page", value = "当前页码", required = true)
            @PathVariable Long page,
            @ApiParam(name = "limit", value = "每页记录数", required = true)
            @PathVariable Long limit,
            @ApiParam(name = "courseQuery", value = "查询对象", required = false)
                    String courseId) {
        Page<Comment> pageParam = new Page<>(page, limit);
        QueryWrapper<Comment> wrapper = new QueryWrapper<>();
        wrapper.eq("course_id",courseId);
        commentService.page(pageParam,wrapper);
        List<Comment> commentList = pageParam.getRecords();
        Map<String, Object> map = new HashMap<>();
        map.put("items", commentList);
        map.put("current", pageParam.getCurrent());
        map.put("pages", pageParam.getPages());
        map.put("size", pageParam.getSize());
        map.put("total", pageParam.getTotal());
        map.put("hasNext", pageParam.hasNext());
        map.put("hasPrevious", pageParam.hasPrevious());
        return R.ok().data(map);
    }
    @ApiOperation(value = "添加评论")
    @PostMapping("auth/save")
    public R save(@RequestBody Comment comment, HttpServletRequest request) {
        String memberId = JwtUtils.getMemberIdByJwtToken(request);
        if(StringUtils.isEmpty(memberId)) {
            return R.error().code(28004).message("请登录");
        }
        comment.setMemberId(memberId);
        UcenterMemberPay ucenterInfo = ucenterClient.getUcenterPay(memberId);
        comment.setNickname(ucenterInfo.getNickname());
        comment.setAvatar(ucenterInfo.getAvatar());
        commentService.save(comment);
        return R.ok();
    }
}