- Реализовал возможность загрузки файлов с клиента в директорию на сервере.

- Настроил доступ к статическим файлам, таким как картинки, стили, и т.д.

https://www.youtube.com/watch?v=bmMWrTMB5uo&list=PLU2ftbIeotGpAYRP9Iv2KLIwK36-o_qYk&index=10

src/main/java/net/sytes/kashey/sweater/config/MvcConfig.java

@@ -1,13 +1,27 @@
 package net.sytes.kashey.sweater.config;
 
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
 import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
 @Configuration
 public class MvcConfig implements WebMvcConfigurer {
+
+    @Value("${upload.path}")
+    private String uploadPath;
+
     public void addViewControllers(ViewControllerRegistry registry) {
 
         registry.addViewController("/login").setViewName("login");
     }
+
+    @Override
+    public void addResourceHandlers(ResourceHandlerRegistry registry) {
+        registry.addResourceHandler("/img/**")
+                .addResourceLocations("file://" + uploadPath + "/");
+        registry.addResourceHandler("/static/**")
+                .addResourceLocations("classpath:/static/");
+    }
 }

src/main/java/net/sytes/kashey/sweater/config/WebSecurityConfig.java

@@ -17,7 +17,7 @@ public class WebSecurityConfig {
     public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
         http
                 .authorizeHttpRequests((requests) -> requests
-                        .requestMatchers("/", "/registration").permitAll()
+                        .requestMatchers("/", "/registration","/static/**").permitAll()
                         .anyRequest().authenticated()
                 )
                 .formLogin((form) -> form

src/main/java/net/sytes/kashey/sweater/controller/MainController.java

@@ -1,27 +1,32 @@
 package net.sytes.kashey.sweater.controller;
 
 import net.sytes.kashey.sweater.domain.Message;
-import net.sytes.kashey.sweater.domain.User;
 import net.sytes.kashey.sweater.repository.MessageRepository;
-import net.sytes.kashey.sweater.repository.UserRepository;
 import net.sytes.kashey.sweater.security.CustomUserDetails;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
-import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Objects;
+import java.util.UUID;
 
 @Controller
 public class MainController {
 
     private final MessageRepository messageRepository;
-    private final UserRepository userRepository;
 
-    public MainController(MessageRepository messageRepository, UserRepository userRepository) {
+    @Value("${upload.path}")
+    private String uploadPath;
+
+    public MainController(MessageRepository messageRepository) {
         this.messageRepository = messageRepository;
-        this.userRepository = userRepository;
     }
 
     @GetMapping("/")
@@ -42,18 +47,28 @@ public class MainController {
     }
 
     @PostMapping("/main")
-    public String addMessage(@AuthenticationPrincipal CustomUserDetails details,
+    public String addMessage(@AuthenticationPrincipal CustomUserDetails customUserDetails,
                              @RequestParam String text,
                              @RequestParam String tag,
-                             Model model) {
+                             @RequestParam("file") MultipartFile file,
+                             Model model) throws IOException {
 
-        User author = userRepository.findByUsername(details.getUsername())
-                .orElseThrow(() -> new UsernameNotFoundException("User not found: " + details.getUsername()));
+        Message newMessage = new Message(text, tag, customUserDetails.getUser());
 
-        messageRepository.save(new Message(text, tag, author));
+        if (file != null && !Objects.requireNonNull(file.getOriginalFilename()).isEmpty()) {
+            File uploadDir = new File(uploadPath); // Директория на сервере, куда помещаем пришедший файл
+            if (!uploadDir.exists()) {
+                uploadDir.mkdirs();
+            }
+            String uuidFile = UUID.randomUUID().toString();
+            String resultFilename = uuidFile + "." + file.getOriginalFilename(); // случайный уид + имя файла с клиента
+            file.transferTo(new File(uploadPath + "/" + resultFilename)); // помещаем переименованный файл с клиента в директорию сервера
+            newMessage.setFilename(resultFilename);
+        }
+
+        messageRepository.save(newMessage);
         model.addAttribute("messages", messageRepository.findAll());
         model.addAttribute("tag", "");
         return "main";
     }
-
 }

src/main/java/net/sytes/kashey/sweater/domain/Message.java

@@ -10,6 +10,8 @@ public class Message {
     private String text;
     private String tag;
 
+    private String filename;
+
     @ManyToOne(fetch = FetchType.EAGER)
     @JoinColumn(name = "user_id")
     private User author;
@@ -58,4 +60,12 @@ public class Message {
     public String getAuthorName() {
         return author == null ? "<none>" : author.getUsername();
     }
+
+    public String getFilename() {
+        return filename;
+    }
+
+    public void setFilename(String filename) {
+        this.filename = filename;
+    }
 }

src/main/java/net/sytes/kashey/sweater/security/CustomUserDetails.java

@@ -52,4 +52,8 @@ public class CustomUserDetails implements UserDetails {
     public boolean isEnabled() {
         return user.isEnabled();
     }
+
+    public User getUser() {
+        return user;
+    }
 }

src/main/resources/application.properties

@@ -5,3 +5,5 @@ spring.datasource.password=123456
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 spring.freemarker.expose-request-attributes=true
 spring.freemarker.suffix=.ftl
+upload.path=/home/kashey/soft/sweater/uploads
+

src/main/resources/static/style.css

@@ -0,0 +1,3 @@
+body {
+    color: #191970;
+}

src/main/resources/templates/main.ftl

@@ -7,9 +7,10 @@
     </div>
 
     <div>
-        <form method="post">
+        <form method="post" enctype="multipart/form-data">
             <input type="text" name="text" placeholder="Enter message" />
             <input type="text" name="tag" placeholder="tag">
+            <input type="file" name="file">
             <input type="hidden" name="_csrf" value="${_csrf.token}" />
             <button type="submit">Add message</button>
         </form>
@@ -30,6 +31,11 @@
             <span>${message.text}</span>
             <i>${message.tag}</i>
             <strong>${message.authorName}</strong>
+            <div>
+                <#if message.filename??>
+                    <img src="/img/${message.filename}">
+                </#if>
+            </div>
         </div>
     <#else>
         No messages found

src/main/resources/templates/parts/common.ftl

@@ -4,6 +4,7 @@
     <head>
         <title>Sweater</title>
         <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+        <link href="/static/style.css" rel="stylesheet" type="text/css" />
     </head>
     <body>