优化代码，实体类继承UserDetails

src/main/java/cc/bnblogs/springinit/mapper/UserMapper.java

@@ -7,6 +7,8 @@ import org.apache.ibatis.annotations.Select;
 
 @Mapper
 public interface UserMapper extends BaseMapper<MyUser> {
+
     @Select("SELECT * FROM users WHERE username = #{username}")
     MyUser selectByUsername(String username);
+
 }

src/main/java/cc/bnblogs/springinit/pojo/MyUser.java

@@ -1,14 +1,46 @@
 package cc.bnblogs.springinit.pojo;
+
 import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableName;
 import lombok.Data;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.userdetails.UserDetails;
+
+import java.util.Collection;
+import java.util.Collections;
 
 @Data
 @TableName("users")
-public class MyUser {
+public class MyUser implements UserDetails {
+    // 用户表中的字段如下
     @TableId
     private Long id;
     private String username;
     private String password;
-    private Boolean enabled;
+
+    // UserDetails接口需要实现的方法
+    @Override
+    public Collection<? extends GrantedAuthority> getAuthorities() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public boolean isAccountNonExpired() {
+        return true;
+    }
+
+    @Override
+    public boolean isAccountNonLocked() {
+        return true;
+    }
+
+    @Override
+    public boolean isCredentialsNonExpired() {
+        return true;
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return true;
+    }
 }

src/main/java/cc/bnblogs/springinit/service/CustomUserDetailsService.java

@@ -7,8 +7,6 @@ import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.security.core.userdetails.UserDetailsService;
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.stereotype.Service;
-import org.springframework.security.core.userdetails.User;
-import java.util.Collections;
 
 @Service
 public class CustomUserDetailsService implements UserDetailsService {
@@ -22,16 +20,6 @@ public class CustomUserDetailsService implements UserDetailsService {
         if (user == null) {
             throw new UsernameNotFoundException("User not found with username: " + username);
         }
-
+        return user;
-        // 如果不需要处理权限，直接返回用户信息，默认赋予一个角色
-        return new User(
-            user.getUsername(),
-            user.getPassword(),
-            user.getEnabled(),
-            true,
-            true,
-            true,
-            Collections.emptyList()
-        );
     }
 }