小萌新
6 months ago
parent
d8fba50336
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5 changed files with 73 additions and 267 deletions
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package com.teaching.backend.utils; |
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import com.aliyun.oss.ClientException; |
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import com.aliyun.oss.OSS; |
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import com.aliyun.oss.OSSClientBuilder; |
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import com.aliyun.oss.OSSException; |
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import com.aliyun.oss.common.auth.CredentialsProviderFactory; |
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import com.aliyun.oss.common.auth.EnvironmentVariableCredentialsProvider; |
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import com.aliyun.oss.model.PutObjectRequest; |
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import com.aliyun.oss.model.PutObjectResult; |
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import java.awt.*; |
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import java.io.FileInputStream; |
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import java.io.InputStream; |
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public class AliOssTest { |
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public static void main(String[] args) throws Exception { |
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// Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。因为是华中地区 所以需要加上-lr
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String endpoint = "oss-cn-wuhan-lr.aliyuncs.com"; |
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// 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
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// EnvironmentVariableCredentialsProvider credentialsProvider = CredentialsProviderFactory.newEnvironmentVariableCredentialsProvider();
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String accessKeyId ="LTAI5tFkdu3y5WddxbjgaG2F"; |
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String accessKeySecret ="1xUchxUTlmUBoTV5JQIrKsVjSkmsLF"; |
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// 填写Bucket名称，例如examplebucket。
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String bucketName = "ceshi132132"; |
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// 填写Object完整路径，完整路径中不能包含Bucket名称，例如exampledir/exampleobject.txt。
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String objectName = "ceshi/33.docx"; |
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// 填写本地文件的完整路径，例如D:\\localpath\\examplefile.txt。
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// 如果未指定本地路径，则默认从示例程序所属项目对应本地路径中上传文件流。
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String filePath= "C:\\Users\\jian\\Desktop\\123345\\999\\33.docx"; |
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// 创建OSSClient实例。
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OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret); |
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// OSS ossClient = new OSSClientBuilder().build(endpoint, credentialsProvider);
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try { |
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InputStream inputStream = new FileInputStream(filePath); |
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// 创建PutObjectRequest对象。
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PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, inputStream); |
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// 设置该属性可以返回response。如果不设置，则返回的response为空。
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putObjectRequest.setProcess("true"); |
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// 创建PutObject请求。
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PutObjectResult result = ossClient.putObject(putObjectRequest); |
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// 如果上传成功，则返回200。
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System.out.println(result.getResponse().getStatusCode()); |
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} catch (OSSException oe) { |
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System.out.println("Caught an OSSException, which means your request made it to OSS, " |
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+ "but was rejected with an error response for some reason."); |
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System.out.println("Error Message:" + oe.getErrorMessage()); |
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System.out.println("Error Code:" + oe.getErrorCode()); |
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System.out.println("Request ID:" + oe.getRequestId()); |
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System.out.println("Host ID:" + oe.getHostId()); |
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} catch (ClientException ce) { |
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System.out.println("Caught an ClientException, which means the client encountered " |
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+ "a serious internal problem while trying to communicate with OSS, " |
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+ "such as not being able to access the network."); |
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System.out.println("Error Message:" + ce.getMessage()); |
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} finally { |
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if (ossClient != null) { |
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ossClient.shutdown(); |
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} |
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} |
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} |
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} |
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@ -1,113 +1,9 @@ |
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package com.teaching; |
package com.teaching; |
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import com.teaching.backend.common.BaseResponse; |
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import com.teaching.backend.common.ResultUtils; |
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import com.teaching.backend.model.entity.User; |
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import com.teaching.backend.service.UserService; |
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import org.junit.jupiter.api.Test; |
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import org.springframework.boot.test.context.SpringBootTest; |
import org.springframework.boot.test.context.SpringBootTest; |
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import org.springframework.web.bind.annotation.GetMapping; |
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import javax.annotation.Resource; |
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import java.sql.SQLOutput; |
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import java.util.*; |
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@SpringBootTest |
@SpringBootTest |
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class TeachingBackendApplicationTests { |
class TeachingBackendApplicationTests { |
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@Resource |
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UserService userService; |
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@Test |
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void contextLoads() { |
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//获取用户集合
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List<User> userList=userService.list() ; |
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System.out.println("这是用户集合表"+userList); |
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//将数据存进map集合中
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Map<Integer,Map<Integer,Integer>> userBlogLikes=new HashMap<>(); |
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//遍历userList集合
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for (User user:userList){ |
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int userId = user.getUserid(); |
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int bokeId = user.getBokeid(); |
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int type = user.getType(); |
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userBlogLikes.computeIfAbsent(userId, k -> new HashMap<>()).put(bokeId, type); |
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} |
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System.out.println("这是用户集合的map表："+userBlogLikes); |
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// 选择一个用户
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int userId = 1; |
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// 找到与该用户相似度最高的用户
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int mostSimilarUser = findMostSimilarUser(userId, userBlogLikes); |
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if (mostSimilarUser < 0) { |
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System.out.println("No similar user found."); |
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return; |
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} |
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System.out.println("这是相似度最高的用户"+mostSimilarUser); |
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// 根据相似用户的点赞记录推荐博客
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Set<Integer> recommendedBlogs = recommendBlogs(userId, mostSimilarUser, userBlogLikes); |
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System.out.println("Recommended blogs for user " + userId + ": " + recommendedBlogs); |
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} |
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public static int findMostSimilarUser(int userId, Map<Integer, Map<Integer, Integer>> userBlogLikes) { |
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int mostSimilarUser = -1; |
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int maxSimilarity = 0; |
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Map<Integer, Integer> targetUserLikes = userBlogLikes.get(userId); |
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for (Map.Entry<Integer, Map<Integer, Integer>> entry : userBlogLikes.entrySet()) { |
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if (entry.getKey() != userId) { |
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int similarity = calculateSimilarity(targetUserLikes, entry.getValue()); |
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if (similarity > maxSimilarity) { |
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maxSimilarity = similarity; |
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mostSimilarUser = entry.getKey(); |
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} |
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} |
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} |
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return mostSimilarUser; |
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} |
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public static int calculateSimilarity(Map<Integer, Integer> user1Likes, Map<Integer, Integer> user2Likes) { |
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int similarity = 0; |
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for (Map.Entry<Integer, Integer> entry : user1Likes.entrySet()) { |
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int blogId = entry.getKey(); |
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if (user2Likes.containsKey(blogId) && user2Likes.get(blogId) == 1) { |
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similarity++; |
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} |
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} |
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return similarity; |
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} |
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public static Set<Integer> recommendBlogs(int userId, int similarUserId, Map<Integer, Map<Integer, Integer>> userBlogLikes) { |
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Set<Integer> recommendedBlogs = new HashSet<>(); |
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Map<Integer, Integer> targetUserLikes = userBlogLikes.get(userId); |
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Map<Integer, Integer> similarUserLikes = userBlogLikes.get(similarUserId); |
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for (Map.Entry<Integer, Integer> entry : similarUserLikes.entrySet()) { |
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int blogId = entry.getKey(); |
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if (!targetUserLikes.containsKey(blogId) || targetUserLikes.get(blogId) == 0) { |
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recommendedBlogs.add(blogId); |
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} |
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} |
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return recommendedBlogs; |
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} |
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} |
} |
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