lyh
3 天以前 b508ec38ddf9ed93d4435e8f1e3c4effef798aaa
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
package com.lxzn.auth;
 
import com.lxzn.auth.security.UserJwt;
import lombok.extern.slf4j.Slf4j;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
 
@Slf4j
public class SpringSecurityUtils {
    /**
     * 取得Authentication, 如当前SecurityContext为空时返回null.
     */
    public static Authentication getAuthentication() {
        SecurityContext context = SecurityContextHolder.getContext();
        if(context == null)
            return null;
        return context.getAuthentication();
    }
 
    public static <T extends UserDetails> T getCurrentUser() {
        Authentication authentication = getAuthentication();
        if (authentication == null) {
            return null;
        }
        Object principal = authentication.getPrincipal();
        if (!(principal instanceof UserDetails)) {
            return null;
        }
        return (T) principal;
    }
 
    /**
     * 取得当前用户的id,如果当前用户与未登录,则返回null.
     */
    public static String getCurrentUserId() {
        UserJwt springSecurityUserAuth = getCurrentUser();
        if (springSecurityUserAuth == null) {
            return null;
        }
        return springSecurityUserAuth.getUserId();
    }
 
    /**
     * 取得当前用户的id,如果当前用户与未登录,则返回null.
     */
    public static String getCurrentUsername() {
        UserJwt springSecurityUserAuth = getCurrentUser();
        if (springSecurityUserAuth == null) {
            return null;
        }
        return springSecurityUserAuth.getUsername();
    }
}