文件上传

src/main/java/com/teaching/backend/controller/records/KnowledgeLearningRecordController.java

@@ -5,9 +5,9 @@ import com.teaching.backend.common.BaseResponse;
 import com.teaching.backend.common.CommonResult;
 import com.teaching.backend.common.ResultUtils;
 import com.teaching.backend.filter.ValidateParams;
+import com.teaching.backend.mapper.records.KnowledgeLearningRecordMapper;
 import com.teaching.backend.model.entity.records.CourseLearningRecord;
 import com.teaching.backend.model.entity.records.KnowledgeLearningRecord;
-import com.teaching.backend.model.vo.courses.CoursesVO;
 import com.teaching.backend.model.vo.knowGraph.KnowVO;
 import com.teaching.backend.service.impl.records.KnowledgeLearningRecordServiceImpl;
 import io.swagger.annotations.ApiOperation;
@@ -21,6 +21,8 @@ import java.util.List;
 public class KnowledgeLearningRecordController {
     @Resource
     private KnowledgeLearningRecordServiceImpl knowledgeLearningRecordService;
+    @Resource
+    private KnowledgeLearningRecordMapper knowledgeLearningRecordMapper;
 
     @ApiOperation("添加知识点学习记录")
 //    @ValidateParams({"userId","type","coursesId"})
@@ -56,6 +58,17 @@ public class KnowledgeLearningRecordController {
         return knowledgeLearningRecordService.removeKnowledgeRecord(ids);
     }
 
+    /**
+     * 统计单个学生学习知识点数量
+     * @param userId
+     * @return
+     */
+    @ApiOperation("统计单个学生学习知识点数量")
+    @GetMapping("/countknowledgenumber")
+    public BaseResponse<Integer> countKnowledgeNumber(@RequestParam String userId) {
+        return ResultUtils.success(knowledgeLearningRecordMapper.selectDistinctKnowledgeIdsByUser(userId).size());
+    }
+
     /**
      * 获取学习最多的知识点
      *

src/main/java/com/teaching/backend/controller/records/ResourceLearningRecordController.java

@@ -4,10 +4,12 @@ import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.teaching.backend.common.BaseResponse;
 import com.teaching.backend.common.ResultUtils;
 import com.teaching.backend.filter.ValidateParams;
+import com.teaching.backend.mapper.records.ResourceLearningRecordMapper;
 import com.teaching.backend.model.entity.records.KnowledgeLearningRecord;
 import com.teaching.backend.model.entity.records.ResourceLearningRecord;
 import com.teaching.backend.service.impl.records.KnowledgeLearningRecordServiceImpl;
 import com.teaching.backend.service.impl.records.ResourceLearningRecordServiceImpl;
+import com.teaching.backend.utils.UploadUtils;
 import io.swagger.annotations.ApiOperation;
 import org.springframework.http.MediaType;
 import org.springframework.web.bind.annotation.*;
@@ -17,6 +19,7 @@ import javax.annotation.Resource;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.File;
+import java.io.IOException;
 import java.util.List;
 
 @RestController
@@ -24,6 +27,10 @@ import java.util.List;
 public class ResourceLearningRecordController {
     @Resource
     private ResourceLearningRecordServiceImpl resourceLearningRecordService;
+    @Resource
+    private ResourceLearningRecordMapper resourceLearningRecordMapper;
+
+
 
     @ApiOperation("添加资源学习记录")
 //    @ValidateParams({"userId","type","coursesId"})
@@ -60,11 +67,27 @@ public class ResourceLearningRecordController {
         return resourceLearningRecordService.removeResourceRecord(ids);
     }
 
+    /**
+     * 统计单个学生学习资源数量
+     * @param userId
+     * @return
+     */
+    @ApiOperation("统计单个学生学习资源数量")
+    @GetMapping("/countresourcenumber")
+    public BaseResponse<Integer> countResourceNumber(@RequestParam String userId) {
+        return ResultUtils.success(resourceLearningRecordMapper.selectDistinctResourceIdsByUser(userId).size());
+    }
+
+
     @ApiOperation("上传图片")
     @PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
-    public BaseResponse<String> upload(@RequestPart("filedata") MultipartFile filedata){
+    public BaseResponse<String> upload(@RequestPart("filedata") MultipartFile filedata) throws IOException {
         //调用ser
-
+        System.out.println(filedata.getResource());
+        System.out.println(UploadUtils.saveFileByDirectory(filedata));
+//        File file = filedata.getResource().getFile();
+//        UploadUtils.Chunk(file);
+//        UploadUtils.Merge(file);
         //源文件
 //        File sourseFile = (File) file;
         return ResultUtils.success("hello");

src/main/java/com/teaching/backend/mapper/records/KnowledgeLearningRecordMapper.java

@@ -3,6 +3,10 @@ package com.teaching.backend.mapper.records;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.teaching.backend.model.entity.records.KnowledgeLearningRecord;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
 
 import java.util.List;
 
@@ -16,6 +20,8 @@ import java.util.List;
  */
 public interface KnowledgeLearningRecordMapper extends BaseMapper<KnowledgeLearningRecord> {
 
+    @Select("SELECT knowledge_id FROM knowledge_learning_record WHERE user_id = #{userId} GROUP BY knowledge_id")
+    List<String > selectDistinctKnowledgeIdsByUser(@Param("userId") String userId);
     List<String> queryStudyKnowledgeMaxNumber();
 
     List<String> queryStudyMaxKnowledgeId(String userId);

src/main/java/com/teaching/backend/mapper/records/ResourceLearningRecordMapper.java

@@ -3,6 +3,10 @@ package com.teaching.backend.mapper.records;
 
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.teaching.backend.model.entity.records.ResourceLearningRecord;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.List;
 
 /**
  * <p>
@@ -13,5 +17,7 @@ import com.teaching.backend.model.entity.records.ResourceLearningRecord;
  * @since 2024-07-24
  */
 public interface ResourceLearningRecordMapper extends BaseMapper<ResourceLearningRecord> {
+    @Select("SELECT resource_id FROM resource_learning_record WHERE user_id = #{userId} GROUP BY resource_id")
+    List<String> selectDistinctResourceIdsByUser(@Param("userId") String userId);
 
 }

src/main/java/com/teaching/backend/service/impl/records/KnowledgeLearningRecordServiceImpl.java

@@ -72,13 +72,18 @@ public class KnowledgeLearningRecordServiceImpl extends ServiceImpl<KnowledgeLea
                 .eq("user_id", userId)
                 .eq("courses_id", courseId)
                 .eq("knowledge_id",knowledgeId).count();
-        if (count > 0){
+        if (count > 0){//有人学过
             //自己没学过，人数加1
             if (count1 == 0){
-                knowledgeLearningNumberService.update().setSql("number = number + 1").eq("course_id", courseId).eq("knowledge_id",knowledgeId).update();
+                //该知识点学习人数
-//                System.out.println("用户："+userId+"第一次学这门课");
+                knowledgeLearningNumberService.update()
+                        .setSql("number = number + 1")
+                        .eq("course_id", courseId)
+                        .eq("knowledge_id",knowledgeId).update();
+                System.out.println("用户："+userId+":第一次学这门课");
+
             }
-        }else {
+        }else {//没人学过(自己肯定也没学)
             //该课程第一次被学，人数设置为1
             KnowledgeLearningNumber knowledgeLearningNumber = new KnowledgeLearningNumber();
             knowledgeLearningNumber.setNumber(1);
@@ -96,6 +101,7 @@ public class KnowledgeLearningRecordServiceImpl extends ServiceImpl<KnowledgeLea
         return ResultUtils.success("添加成功");
     }
 
+
     @Override
     public BaseResponse<Page> getPage(int pagenum, int pagesize, String userId, String courseId) {
         //格式化时间
@@ -167,4 +173,5 @@ public class KnowledgeLearningRecordServiceImpl extends ServiceImpl<KnowledgeLea
             return null;
         }
     }
+
 }

src/main/java/com/teaching/backend/service/records/IKnowledgeLearningRecordService.java

@@ -5,6 +5,7 @@ import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.IService;
 import com.teaching.backend.common.BaseResponse;
 import com.teaching.backend.model.entity.records.KnowledgeLearningRecord;
+import io.swagger.models.auth.In;
 import com.teaching.backend.model.vo.knowGraph.KnowVO;
 
 import java.util.List;
@@ -25,6 +26,7 @@ public interface IKnowledgeLearningRecordService extends IService<KnowledgeLearn
 
     BaseResponse<String> removeKnowledgeRecord(List<Long> ids);
 
+
     List<KnowVO> queryMaxKnowledge(String userId);
 }
 

src/main/java/com/teaching/backend/utils/Constants.java

@@ -0,0 +1,5 @@
+package com.teaching.backend.utils;
+
+public class Constants {
+    public static final String UPLOAD_URL = "E:\\workspace\\file\\";
+}

src/main/java/com/teaching/backend/utils/UploadUtils.java

@@ -0,0 +1,115 @@
+package com.teaching.backend.utils;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.io.FilenameUtils;
+import org.apache.commons.io.FileUtils;
+import org.springframework.util.DigestUtils;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.*;
+
+import static com.teaching.backend.utils.Constants.UPLOAD_URL;
+
+@Slf4j
+//文件上传工具类
+public class UploadUtils {
+
+    public static String saveFileByDirectory (MultipartFile file) {
+        String url = "";
+        try {
+            // 将文件保存在服务器目录中
+            // 文件名称
+            String uuid = UUID.randomUUID().toString();
+            // 得到上传文件后缀
+            String originalName = file.getOriginalFilename();
+            String ext = "." + FilenameUtils.getExtension(originalName);
+            // 新生成的文件名称
+            String fileName = uuid + ext;
+            // 复制文件
+            File targetFile = new File(UPLOAD_URL, fileName);
+            url = UPLOAD_URL + fileName;
+            FileUtils.writeByteArrayToFile(targetFile, file.getBytes());
+            System.out.println("保存成功");
+        } catch (IOException e) {
+            log.error("保存文件到服务器（本地）失败",e);
+        }
+        return url;
+    }
+
+    public static void Chunk(File sourseFile) throws IOException {
+//        //源文件
+//        File sourseFile = new File("D:/Users/Desktop/image/剪映/7.18/7月20.mp4");
+        //分块文件存储路径
+        String chunkFilePath = "E:\\workspace\\chunk";
+        //分块文件大小
+        int chunkSize = 1024 * 1024 * 1;
+        //分块文件个数
+        int chunkNum = (int) Math.ceil(sourseFile.length() * 1.0 / chunkSize);
+        //使用流从源文件读数据，向分块文件中写数据
+        RandomAccessFile raf_r = new RandomAccessFile(sourseFile, "r");
+        //缓存区
+        byte[] bytes = new byte[1024];
+        for (int i = 0; i < chunkNum; i++) {
+            File chunkFile = new File(chunkFilePath + i);
+            //分块文件写入流
+            RandomAccessFile raf_rw = new RandomAccessFile(chunkFile, "rw");
+            int len = -1;
+            while((len=raf_r.read(bytes)) != -1){
+                raf_rw.write(bytes, 0, len);
+                if (chunkFile.length() >= chunkSize){
+                    break;
+                }
+            }
+            raf_rw.close();
+        }
+        raf_r.close();
+    }
+
+    public static void Merge(File sourseFile) throws IOException {
+        //块文件目录
+        File chunkFolder = new File("E:\\workspace\\chunk");
+//        //源文件
+//        File sourseFile = new File("D:/Users/Desktop/image/剪映/7.18/7月20.mp4");
+        //合并后的文件
+        File mergeFile = new File("E:\\workspace\\file\\"+sourseFile.getName());
+
+        //取出所有分块文件
+        File[] files = chunkFolder.listFiles();
+        //将数组转成list
+        List<File> fileList = Arrays.asList(files);
+        //对分块文件排序
+        Collections.sort(fileList, new Comparator<File>() {
+            @Override
+            public int compare(File o1, File o2) {
+                return Integer.parseInt(o1.getName()) - Integer.parseInt(o2.getName()); //升序
+            }
+        });
+        //向合并文件写的流
+        RandomAccessFile raf_rw = new RandomAccessFile(mergeFile, "rw");
+        //缓存区
+        byte[] bytes = new byte[1024];
+        //遍历分块文件，向合并的文件写
+        for (File file : fileList) {
+            //读分块的流
+            RandomAccessFile raf_r = new RandomAccessFile(file, "r");
+            int len = -1;
+            while((len = raf_r.read(bytes)) != -1){
+                raf_rw.write(bytes, 0, len);
+            }
+            raf_r.close();
+        }
+        raf_rw.close();
+        //合并文件完成后对合并的文件校验
+        FileInputStream fileInputStream_merge = new FileInputStream(mergeFile);
+        FileInputStream fileInputStream_source = new FileInputStream(sourseFile);
+        String md5_merge = DigestUtils.md5DigestAsHex(fileInputStream_merge);
+        String md5_source = DigestUtils.md5DigestAsHex(fileInputStream_source);
+        if (md5_merge.equals(md5_source)){
+            System.out.println("文件合并成功！");
+        }
+    }
+}

src/test/java/com/teaching/test.java

@@ -0,0 +1,37 @@
+package com.teaching;
+
+
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import javax.annotation.Resource;
+
+@Slf4j
+@SpringBootTest
+public class test {
+
+    @Resource
+    private KnowledgeLearningCountServiceImpl knowledgeLearningCountService;
+    @Test
+    public void countknowledge(){
+        String userId = "2";
+//        System.out.println(knowledgeLearningCountService.list());
+//        List<KnowledgeLearningCount> list = knowledgeLearningCountService.query().eq("user_id", userId).list();
+//        HashSet<KnowledgeLearningCount> set = new HashSet<>(list);
+//        System.out.println(set.size());
+//        Long count = knowledgeLearningCountService.query().eq("user_id", userId).count();
+//        if (count == 0){
+//            KnowledgeLearningCount knowledgeLearningCount = new KnowledgeLearningCount();
+//            knowledgeLearningCount.setUserId(userId);
+//            knowledgeLearningCount.setNumber(1);
+//            knowledgeLearningCountService.save(knowledgeLearningCount);
+//        }else {
+//            //该用户学习知识点数+1
+//            boolean is = knowledgeLearningCountService.update()
+//                    .setSql("number = "+set.size())
+//                    .eq("user_id", userId).update();
+//            System.out.println(is);
+//        }
+    }
+}