【项目】小帽学堂（十四）

小帽学堂

二十、名师列表功能

1. 讲师分页查询接口

@RestController
@RequestMapping("/eduservice/teacherfront")
public class TeacherFrontController {
    @Autowired
    private EduTeacherService teacherService;

    // 1.分页查询讲师的方法
    @PostMapping("getTeacherFrontList/{page}/{limit}")
    public R getTeacherFrontList(@PathVariable long page, @PathVariable long limit) {
        Page<EduTeacher> pageTeacher = new Page<>(page, limit);
        Map<String,Object> map = teacherService.getTeacherFrontList(pageTeacher);
        // 返回分页所有数据
        return R.ok().data(map);
    }
}

public interface EduTeacherService extends IService<EduTeacher> {

    // 1.分页查询讲师的方法
    Map<String, Object> getTeacherFrontList(Page<EduTeacher> pageTeacher);
}

@Service
public class EduTeacherServiceImpl extends ServiceImpl<EduTeacherMapper, EduTeacher> implements EduTeacherService {

    @Override
    public Map<String, Object> getTeacherFrontList(Page<EduTeacher> pageParam) {
        QueryWrapper<EduTeacher> wrapper = new QueryWrapper<>();
        wrapper.orderByDesc("id");
        // 把分页数据封装到pageTeacher对象
        baseMapper.selectPage(pageParam, wrapper);

        List<EduTeacher> records = pageParam.getRecords();
        long current = pageParam.getCurrent();
        long pages = pageParam.getPages();
        long size = pageParam.getSize();
        long total = pageParam.getTotal();
        boolean hasNext = pageParam.hasNext();
        boolean hasPrevious = pageParam.hasPrevious();
        // 把分页数据获取出来，放到map集合
        Map<String, Object> map = new HashMap<>();
        map.put("items", records);
        map.put("current", current);
        map.put("pages", pages);
        map.put("size", size);
        map.put("total", total);
        map.put("hasNext", hasNext);
        map.put("hasPrevious", hasPrevious);

        return map;
    }
}

2. 讲师分页查询前端

// pages\teacher\index.vue
<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- 讲师列表 开始 -->
    <section class="container">
      <header class="comm-title all-teacher-title">
        <h2 class="fl tac">
          <span class="c-333">全部讲师</span>
        </h2>
        <section class="c-tab-title">
          <a id="subjectAll" title="全部" href="#">全部</a>
          <!-- <c:forEach var="subject" items="${subjectList }">
                            <a id="${subject.subjectId}" title="${subject.subjectName }" href="javascript:void(0)" onclick="submitForm(${subject.subjectId})">${subject.subjectName }</a>
          </c:forEach>-->
        </section>
      </header>
      <section class="c-sort-box unBr">
        <div>
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total == 0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article v-if="data.total > 0" class="i-teacher-list">
            <ul class="of">
              <li v-for="teacher in data.items" :key="teacher.id">
                <section class="i-teach-wrap">
                  <div class="i-teach-pic">
                    <a href="/teacher/1" :title="teacher.name" target="_blank">
                      <img :src="teacher.avatar" :alt="teacher.name" height="142" hright="142">
                    </a>
                  </div>
                  <div class="mt10 hLh30 txtOf tac">
                    <a href="/teacher/1" :title="teacher.name" target="_blank" class="fsize18 c-666">{{teacher.name}}</a>
                  </div>
                  <div class="hLh30 txtOf tac">
                    <span class="fsize14 c-999">{{teacher.intro}}</span>
                  </div>
                  <div class="mt15 i-q-txt">
                    <p class="c-999 f-fA">{{teacher.career}}</p>
                  </div>
                </section>
              </li>             
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <!-- 公共分页 开始 -->
<div>
  <div class="paging">
    <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
    <a
      :class="{undisable: !data.hasPrevious}"
      href="#"
      title="首页"
      @click.prevent="gotoPage(1)">首</a>
    <a
      :class="{undisable: !data.hasPrevious}"
      href="#"
      title="前一页"
      @click.prevent="gotoPage(data.current-1)">&lt;</a>
    <a
      v-for="page in data.pages"
      :key="page"
      :class="{current: data.current == page, undisable: data.current == page}"
      :title="'第'+page+'页'"
      href="#"
      @click.prevent="gotoPage(page)">{{ page }}</a>
    <a
      :class="{undisable: !data.hasNext}"
      href="#"
      title="后一页"
      @click.prevent="gotoPage(data.current+1)">&gt;</a>
    <a
      :class="{undisable: !data.hasNext}"
      href="#"
      title="末页"
      @click.prevent="gotoPage(data.pages)">末</a>
    <div class="clear"/>
  </div>
</div>
<!-- 公共分页 结束 -->
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /讲师列表 结束 -->
  </div>
</template>
<script>
import teacherApi from '@/api/teacher'

export default {
  // 异步调用，调用一次
  // params：相当于之前 this.$route.params.id
  asyncData({params, error}) {
    return teacherApi.getTeacherList(1, 8)
      .then(response => {
        return { data: response.data.data }
      })
  },
  methods: {
    // 分页切换的方法
    // 参数是页码数
    gotoPage(page) {
      teacherApi.getTeacherList(page, 8)
        .then(response => {
          this.data = response.data.data
        })
    }
  }
};
</script>

3. 讲师详情接口

@RestController
@RequestMapping("/eduservice/teacherfront")
@CrossOrigin
public class TeacherFrontController {
    @Autowired
    private EduTeacherService teacherService;

    @Autowired
    private EduCourseService courseService;

    // 2.讲师详情的功能
    @GetMapping("getTeacherFrontInfo/{teacherId}")
    public R getTeacherFrontInfo(@PathVariable String teacherId) {
        // 1. 根据讲师id查询讲师基本信息
        EduTeacher eduTeacher = teacherService.getById(teacherId);
        // 2. 根据讲师id查询所讲课程
        QueryWrapper<EduCourse> wrapper = new QueryWrapper<>();
        wrapper.eq("teacher_id", teacherId);
        List<EduCourse> courseList = courseService.list(wrapper);
        return R.ok().data("teacher", eduTeacher).data("courseList", courseList);
    }
}

4. 讲师详情前端

// api\teacher.js
import request from '@/utils/request'

export default {
  // 分页讲师查询的方法
  getTeacherList(page,limit) {
    return request({
      url: `/eduservice/teacherfront/getTeacherFrontList/${page}/${limit}`,
      method: 'post'
    })
  },
  // 讲师详情的方法
  getTeacherInfo(id) {
    return request({
      url: `/eduservice/teacherfront/getTeacherFrontInfo/${id}`,
      method: 'get'
    })
  }
}

// pages\teacher\index.vue
<ul class="of">
  <li v-for="teacher in data.items" :key="teacher.id">
  <section class="i-teach-wrap">
  <div class="i-teach-pic">
    <a :href="'/teacher/' + teacher.id" :title="teacher.name" target="_blank">
    <img :src="teacher.avatar" :alt="teacher.name" height="142" hright="142">
    a>
  div>
  <div class="mt10 hLh30 txtOf tac">
     <a :href="'/teacher/' + teacher.id" :title="teacher.name" target="_blank" class="fsize18 c-666">{{teacher.name}}a>
  div>
  <div class="hLh30 txtOf tac">
      <span class="fsize14 c-999">{{teacher.intro}}span>
  div>
  <div class="mt15 i-q-txt">
      <p class="c-999 f-fA">{{teacher.career}}p>
   div>
   section>
 li>             
ul>

// pages\teacher\_id.vue
<template>
  <div id="aCoursesList" class="bg-fa of">
    
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">讲师介绍span>
        h2>
      header>
      <div class="t-infor-wrap">
        
        <section class="fl t-infor-box c-desc-content">
          <div class="mt20 ml20">
            <section class="t-infor-pic">
              <img :src="teacher.avatar">
            section>
            <h3 class="hLh30">
              <span class="fsize24 c-333">{{teacher.name}} 
                {{ teacher.level===1?'高级讲师':'首席讲师' }}
              span>
            h3>
            <section class="mt10">
              <span class="t-tag-bg">{{teacher.intro}}span>
            section>
            <section class="t-infor-txt">
              <p
                class="mt20"
              >{{teacher.career}}p>
            section>
            <div class="clear">div>
          div>
        section>
        <div class="clear">div>
      div>
      <section class="mt30">
        <div>
          <header class="comm-title all-teacher-title c-course-content">
            <h2 class="fl tac">
              <span class="c-333">主讲课程span>
            h2>
            <section class="c-tab-title">
              <a href="javascript: void(0)"> a>
            section>
          header>
          
          <section class="no-data-wrap" v-if="courseList.length == 0">
            <em class="icon30 no-data-ico"> em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...span>
          section>
          
          <article class="comm-course-list">
            <ul class="of">
              <li v-for="course in courseList" :key="course.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="course.cover" class="img-responsive" >
                    <div class="cc-mask">
                      <a href="#" title="开始学习" target="_blank" class="comm-btn c-btn-1">开始学习a>
                    div>
                  section>
                  <h3 class="hLh30 txtOf mt10">
                    <a href="#" :title="course.title" target="_blank" class="course-title fsize18 c-333">{{course.title}}a>
                  h3>
                div>
              li>
            ul>
            <div class="clear">div>
          article>
        div>
      section>
    section>
    
  div>
template>

<script>
import teacherApi from '@/api/teacher'
export default {
  // this.$route.params.id 等价 params.id 获取路径id值
   asyncData({params, error}) {
    return teacherApi.getTeacherInfo(params.id)
      .then(response => {
        return { 
          teacher: response.data.data.teacher,
          courseList: response.data.data.courseList
         }
      })
  },
};
script>

5. 课程列表接口

5.1 课程后端接口

@Data
public class CourseFrontVo {

    @ApiModelProperty(value = "课程名称")
    private String title;

    @ApiModelProperty(value = "讲师id")
    private String teacherId;

    @ApiModelProperty(value = "一级类别id")
    private String subjectParentId;

    @ApiModelProperty(value = "二级类别id")
    private String subjectId;

    @ApiModelProperty(value = "销量排序")
    private String buyCountSort;

    @ApiModelProperty(value = "最新时间排序")
    private String gmtCreateSort;

    @ApiModelProperty(value = "价格排序")
    private String priceSort;
}

@RestController
@RequestMapping("/eduservice/coursefront")
@CrossOrigin
public class CourseFrontController {
    @Autowired
    private EduCourseService courseService;

    // 1.条件查询带分页查询课程
    @PostMapping("getFrontCourseList/{page}/{limit}")
    public R getFrontCourseList(@PathVariable long page, @PathVariable long limit, @RequestBody(required = false) CourseFrontVo courseFrontVo) {
        Page<EduCourse> pageCourse = new Page<>(page,limit);
        Map<String,Object> map = courseService.getCourseFrontList(pageCourse, courseFrontVo);
        // 返回分页所有数据
        return R.ok().data(map);
    }
}

public interface EduCourseService extends IService<EduCourse> {
    // 条件查询带分页查询课程（前台）
    Map<String, Object> getCourseFrontList(Page<EduCourse> pageCourse, CourseFrontVo courseFrontVo);
}

@Service
public class EduCourseServiceImpl extends ServiceImpl<EduCourseMapper, EduCourse> implements EduCourseService {
    // 课程描述注入
    @Autowired
    private EduCourseDescriptionService courseDescriptionService;

    // 注入小节和章节service
    @Autowired
    private EduVideoService eduVideoService;

    @Autowired
    private EduChapterService eduChapterService;

    // 条件查询带分页查询课程（前台）
    @Override
    public Map<String, Object> getCourseFrontList(Page<EduCourse> pageCourse, CourseFrontVo courseFrontVo) {
        QueryWrapper<EduCourse> wrapper = new QueryWrapper<>();
        // 判断条件值是否为空，不为空拼接
        if(!StringUtils.isEmpty(courseFrontVo.getSubjectParentId())) {   // 一级分类
            wrapper.eq("subject_parent_id", courseFrontVo.getSubjectParentId());
        }
        if(!StringUtils.isEmpty(courseFrontVo.getSubjectId())) {   // 二级分类
            wrapper.eq("subject_id", courseFrontVo.getSubjectId());
        }
        if(!StringUtils.isEmpty(courseFrontVo.getBuyCountSort())) {   // 关注度
            wrapper.orderByDesc("buy_count");
        }
        if(!StringUtils.isEmpty(courseFrontVo.getGmtCreateSort())) {   // 最新
            wrapper.orderByDesc("gmt_create");
        }
        if(!StringUtils.isEmpty(courseFrontVo.getPriceSort())) {   // 价格
            wrapper.orderByDesc("price");
        }
        baseMapper.selectPage(pageCourse, wrapper);
        List<EduCourse> records = pageCourse.getRecords();
        long current = pageCourse.getCurrent();
        long pages = pageCourse.getPages();
        long size = pageCourse.getSize();
        long total = pageCourse.getTotal();
        boolean hasNext = pageCourse.hasNext();
        boolean hasPrevious = pageCourse.hasPrevious();


        Map<String, Object> map = new HashMap<>();
        map.put("items", records);
        map.put("current", current);
        map.put("pages", pages);
        map.put("size", size);
        map.put("total", total);
        map.put("hasNext", hasNext);
        map.put("hasPrevious", hasPrevious);
        return map;
    }
}

5.2 课程列表前端