网站首页

src/main/java/com/teaching/backend/controller/courses/CoursesController.java

@@ -16,7 +16,9 @@ import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 /**
  * <p>
@@ -33,6 +35,19 @@ public class CoursesController {
 
     @Autowired
     ICoursesService coursesService;
+    @ApiOperation("网站首页")
+    @GetMapping("/index")
+    public BaseResponse<Map<String,Object>> getData(@RequestParam("page") int page, @RequestParam("pageSize") int pageSize) {
+        List<CoursesVO> coursesVo = coursesService.getPagePageSize(page, pageSize);
+        long totalcount = coursesService.count();
+        long toatlPages = (int) Math.ceil((double)totalcount / pageSize);
+        Map<String,Object> objectMap = new HashMap<>();
+        objectMap.put("content",coursesVo);
+        objectMap.put("totalcount", totalcount);
+        objectMap.put("totalPages", toatlPages);
+        objectMap.put("currentPage", page);
+        return ResultUtils.success(objectMap);
+    }
 
     @ApiOperation("新增课程--同步新增课程的总体目标")
     @PostMapping("/addcourse")

src/main/java/com/teaching/backend/mapper/courses/CoursesMapper.java

@@ -3,6 +3,10 @@ package com.teaching.backend.mapper.courses;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.teaching.backend.model.entity.courses.Courses;
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
 
 /**
  * <p>
@@ -14,5 +18,7 @@ import org.apache.ibatis.annotations.Mapper;
  */
 @Mapper
 public interface CoursesMapper extends BaseMapper<Courses> {
+    @Select("SELECT * FROM courses LIMIT #{start}, #{pageSize}")
+    List<Courses> getItemsByPage(@Param("start") int start, @Param("pageSize") int pageSize);
 
 }

src/main/java/com/teaching/backend/model/vo/CoursesVO.java

@@ -45,4 +45,16 @@ public class CoursesVO {
     @ApiModelProperty(value = "课程学时",required = true)
     private Integer classhours;
 
+    @ApiModelProperty(value = "课程描述",required = true)
+    private String description;
+
+    @ApiModelProperty(value = "课程总学时",required = true)
+    private Integer totalHours;
+
+    @ApiModelProperty(value = "课程章节总数",required = true)
+    private Integer totalchapter;
+
+    @ApiModelProperty(value = "课程知识点总数",required = true)
+    private Integer totalKnow;
+
 }

src/main/java/com/teaching/backend/service/courses/ICoursesService.java

@@ -27,4 +27,8 @@ public interface ICoursesService extends IService<Courses> {
 
 
     void deleteBatchByIds(String id);
+
+    int countHours(String id);
+
+    List<CoursesVO> getPagePageSize(int page, int pageSize);
 }

src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java

@@ -1,6 +1,7 @@
 package com.teaching.backend.service.impl.courses;
 
 
+import cn.hutool.core.bean.BeanUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
@@ -25,6 +26,7 @@ import org.springframework.transaction.annotation.Transactional;
 
 import java.time.LocalDateTime;
 import java.util.List;
+import java.util.stream.Collectors;
 
 /**
  * <p>
@@ -115,4 +117,60 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
     }
 
 
+    @Override
+    public List<CoursesVO> getPagePageSize(int page, int pageSize) {
+        int startIndex = (page-1) * pageSize;
+        List<Courses> list = coursesMapper.getItemsByPage(startIndex, pageSize);
+//        List<Courses> list = coursesMapper.selectList(null);
+        List<CoursesVO> coursesVo = BeanUtil.copyToList(list, CoursesVO.class);
+        coursesVo = coursesVo.stream().map((item) -> {
+
+            item.setTotalHours(countHours(item.getId()));
+            item.setTotalchapter(100);
+            item.setTotalKnow(100);
+//            if (StringUtils.isBlank(item.getName()) ||
+//                    StringUtils.isBlank(item.getDescription()) ){
+//                throw new BusinessException(ErrorCode.OPERATION_ERROR,"数据格式有问题，请修改");
+//            }
+            return item;
+        }).collect(Collectors.toList());
+        return coursesVo;
+
+    }
+
+    @Override
+    public int countHours(String id) {
+        Courses courses = coursesMapper.selectById(id);
+
+        Integer classhours = 0;
+        Integer theoryhours = 0;
+        Integer practicehours = 0;
+        Integer experimenthours = 0;
+        Integer otherhours = 0;
+        if (courses.getClasshours() != null) {
+            classhours = courses.getClasshours();
+        }
+
+        if (courses.getTheoryhours() != null) {
+            theoryhours = courses.getTheoryhours();
+        }
+
+        if (courses.getPracticehours() != null) {
+            practicehours = courses.getPracticehours();
+        }
+
+        if (courses.getExperimenthours() != null) {
+            experimenthours = courses.getExperimenthours();
+        }
+
+        if (courses.getOtherhours() != null) {
+            otherhours = courses.getOtherhours();
+        }
+        int total = classhours + theoryhours + practicehours + experimenthours + otherhours;
+
+        return total;
+
+    }
+
+
 }

src/main/resources/application.yml

@@ -10,7 +10,7 @@ spring:
     driver-class-name: com.mysql.cj.jdbc.Driver
     url: jdbc:mysql://localhost:3306/teaching_db
     username: root
-    password: root
+    password: 1234567788
 mybatis:
   configuration:
     map-underscore-to-camel-case: true