Repository navigation
Expand file tree
/
Copy pathspringboot-annotation.html
More file actions
1899 lines (1531 loc) · 71.3 KB
/
Copy pathspringboot-annotation.html
File metadata and controls
1899 lines (1531 loc) · 71.3 KB
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
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<!DOCTYPE HTML>
<html lang="zh-CN">
<head><meta name="generator" content="Hexo 3.9.0">
<meta charset="utf-8">
<meta name="keywords" content="Springboot常用注解, 记录">
<meta name="baidu-site-verification" content="fmlEuI34ir">
<meta name="google-site-verification" content="yCy2azpds5XSuGZvis6OuA-XIGF5GuGpYRAaGfD6o48">
<meta name="360-site-verification" content="b7c11a830ef90fd1464ad6206bb7b6e7">
<meta name="description" content="@RequestParm@RequestParam是从请求体重获取参数值
@ResponseBody
@RequestMapping(value = &quot;/h&quot;,method = RequestMethod.GET">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<meta name="renderer" content="webkit|ie-stand|ie-comp">
<meta name="mobile-web-app-capable" content="yes">
<meta name="format-detection" content="telephone=no">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<title>Springboot常用注解 | Ji`s Blog</title>
<link rel="icon" type="image/png" href="/favicon.png">
<link rel="stylesheet" type="text/css" href="/libs/awesome/css/font-awesome.min.css">
<link rel="stylesheet" type="text/css" href="/libs/materialize/materialize.min.css">
<link rel="stylesheet" type="text/css" href="/libs/aos/aos.css">
<link rel="stylesheet" type="text/css" href="/libs/animate/animate.min.css">
<link rel="stylesheet" type="text/css" href="/libs/lightGallery/css/lightgallery.min.css">
<link rel="stylesheet" type="text/css" href="/css/matery.css">
<link rel="stylesheet" type="text/css" href="/css/my.css">
<style type="text/css">
</style>
<script src="/libs/jquery/jquery-2.2.0.min.js"></script>
<script src="https://sdk.jinrishici.com/v2/browser/jinrishici.js" charset="utf-8"></script>
<script>
var _hmt = _hmt || [];
(function() {
var hm = document.createElement("script");
hm.src = "https://hm.baidu.com/hm.js?4d1d73af45a62734730491a6b6c41da4";
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script>
<script>(function (i, s, o, g, r, a, m) {
i['DaoVoiceObject'] = r;
i[r] = i[r] ||
function () {
(i[r].q = i[r].q || []).push(arguments);
};
i[r].l = 1 * new Date();
a = s.createElement(o);
m = s.getElementsByTagName(o)[0];
a.async = 1;
a.src = g;
a.charset = 'utf-8';
m.parentNode.insertBefore(a, m);
})(window, document, 'script', ('https:' === document.location.protocol ? 'https:' : 'http:') + "//widget.daovoice.io/widget/xxx.js", 'daovoice');
daovoice('init', {
app_id: "xxx",
});
daovoice('update');
</script>
<script>
(function(){
var bp = document.createElement('script');
var curProtocol = window.location.protocol.split(':')[0];
if (curProtocol === 'https') {
bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';
}
else {
bp.src = 'http://push.zhanzhang.baidu.com/push.js';
}
var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(bp, s);
})();
</script>
<script>
(function(){
var src = "https://jspassport.ssl.qhimg.com/11.0.1.js?d182b3f28525f2db83acfaaf6e696dba";
document.write('<script src="' + src + '" id="sozz"><\/script>');
})();
</script>
<meta name="baidu-site-verification" content>
<style type="text/css" lang="css">
#loading-container{
position: fixed;
top: 0;
left: 0;
min-height: 100vh;
width: 100vw;
z-index: 9999;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
background: #FFF;
text-align: center;
/* loaderҳ����ʧ���ý����ķ�ʽ*/
-webkit-transition: opacity 1s ease;
-moz-transition: opacity 1s ease;
-o-transition: opacity 1s ease;
transition: opacity 1s ease;
}
.loading-image{
width: 120px;
height: 50px;
transform: translate(-50%);
}
.loading-image div:nth-child(2) {
-webkit-animation: pacman-balls 1s linear 0s infinite;
animation: pacman-balls 1s linear 0s infinite
}
.loading-image div:nth-child(3) {
-webkit-animation: pacman-balls 1s linear .33s infinite;
animation: pacman-balls 1s linear .33s infinite
}
.loading-image div:nth-child(4) {
-webkit-animation: pacman-balls 1s linear .66s infinite;
animation: pacman-balls 1s linear .66s infinite
}
.loading-image div:nth-child(5) {
-webkit-animation: pacman-balls 1s linear .99s infinite;
animation: pacman-balls 1s linear .99s infinite
}
.loading-image div:first-of-type {
width: 0;
height: 0;
border: 25px solid #49b1f5;
border-right-color: transparent;
border-radius: 25px;
-webkit-animation: rotate_pacman_half_up .5s 0s infinite;
animation: rotate_pacman_half_up .5s 0s infinite;
}
.loading-image div:nth-child(2) {
width: 0;
height: 0;
border: 25px solid #49b1f5;
border-right-color: transparent;
border-radius: 25px;
-webkit-animation: rotate_pacman_half_down .5s 0s infinite;
animation: rotate_pacman_half_down .5s 0s infinite;
margin-top: -50px;
}
@-webkit-keyframes rotate_pacman_half_up {0% {transform: rotate(270deg)}50% {transform: rotate(1turn)}to {transform: rotate(270deg)}}
@keyframes rotate_pacman_half_up {0% {transform: rotate(270deg)}50% {transform: rotate(1turn)}to {transform: rotate(270deg)}}
@-webkit-keyframes rotate_pacman_half_down {0% {transform: rotate(90deg)}50% {transform: rotate(0deg)}to {transform: rotate(90deg)}}
@keyframes rotate_pacman_half_down {0% {transform: rotate(90deg)}50% {transform: rotate(0deg)}to {transform: rotate(90deg)}}
@-webkit-keyframes pacman-balls {75% {opacity: .7}to {transform: translate(-100px, -6.25px)}}
@keyframes pacman-balls {75% {opacity: .7}to {transform: translate(-100px, -6.25px)}}
.loading-image div:nth-child(3),
.loading-image div:nth-child(4),
.loading-image div:nth-child(5),
.loading-image div:nth-child(6){
background-color: #49b1f5;
width: 15px;
height: 15px;
border-radius: 100%;
margin: 2px;
width: 10px;
height: 10px;
position: absolute;
transform: translateY(-6.25px);
top: 25px;
left: 100px;
}
.loading-text{
margin-bottom: 20vh;
text-align: center;
color: #2c3e50;
font-size: 2rem;
box-sizing: border-box;
padding: 0 10px;
text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
@media only screen and (max-width: 500px) {
.loading-text{
font-size: 1.5rem;
}
}
.fadeout {
opacity: 0;
filter: alpha(opacity=0);
}
/* logo���ֶ��� */
@-webkit-keyframes fadeInDown{0%{opacity:0;-webkit-transform:translate3d(0,-100%,0);transform:translate3d(0,-100%,0)}100%{opacity:1;-webkit-transform:none;transform:none}}
@keyframes fadeInDown{0%{opacity:0;-webkit-transform:translate3d(0,-100%,0);}}
</style>
<script>
(function () {
const loaded = function(){
setTimeout(function(){
const loader = document.getElementById("loading-container");
loader.className="fadeout" ;//ʹ�ý����ķ�������loading page
// document.getElementById("body-wrap").style.display="flex";
setTimeout(function(){
loader.style.display="none";
},1000);
},1000);//ǿ����ʾloading page 1s
};
loaded();
})()
</script><link rel="stylesheet" href="/css/prism-tomorrow.css" type="text/css">
<link rel="stylesheet" href="/css/prism-line-numbers.css" type="text/css"><style type="text/css" lang="css">
#loading-container{
position: fixed;
top: 0;
left: 0;
min-height: 100vh;
width: 100vw;
z-index: 9999;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
background: #FFF;
text-align: center;
/* loaderҳ����ʧ���ý����ķ�ʽ*/
-webkit-transition: opacity 1s ease;
-moz-transition: opacity 1s ease;
-o-transition: opacity 1s ease;
transition: opacity 1s ease;
}
.loading-image{
width: 120px;
height: 50px;
transform: translate(-50%);
}
.loading-image div:nth-child(2) {
-webkit-animation: pacman-balls 1s linear 0s infinite;
animation: pacman-balls 1s linear 0s infinite
}
.loading-image div:nth-child(3) {
-webkit-animation: pacman-balls 1s linear .33s infinite;
animation: pacman-balls 1s linear .33s infinite
}
.loading-image div:nth-child(4) {
-webkit-animation: pacman-balls 1s linear .66s infinite;
animation: pacman-balls 1s linear .66s infinite
}
.loading-image div:nth-child(5) {
-webkit-animation: pacman-balls 1s linear .99s infinite;
animation: pacman-balls 1s linear .99s infinite
}
.loading-image div:first-of-type {
width: 0;
height: 0;
border: 25px solid #49b1f5;
border-right-color: transparent;
border-radius: 25px;
-webkit-animation: rotate_pacman_half_up .5s 0s infinite;
animation: rotate_pacman_half_up .5s 0s infinite;
}
.loading-image div:nth-child(2) {
width: 0;
height: 0;
border: 25px solid #49b1f5;
border-right-color: transparent;
border-radius: 25px;
-webkit-animation: rotate_pacman_half_down .5s 0s infinite;
animation: rotate_pacman_half_down .5s 0s infinite;
margin-top: -50px;
}
@-webkit-keyframes rotate_pacman_half_up {0% {transform: rotate(270deg)}50% {transform: rotate(1turn)}to {transform: rotate(270deg)}}
@keyframes rotate_pacman_half_up {0% {transform: rotate(270deg)}50% {transform: rotate(1turn)}to {transform: rotate(270deg)}}
@-webkit-keyframes rotate_pacman_half_down {0% {transform: rotate(90deg)}50% {transform: rotate(0deg)}to {transform: rotate(90deg)}}
@keyframes rotate_pacman_half_down {0% {transform: rotate(90deg)}50% {transform: rotate(0deg)}to {transform: rotate(90deg)}}
@-webkit-keyframes pacman-balls {75% {opacity: .7}to {transform: translate(-100px, -6.25px)}}
@keyframes pacman-balls {75% {opacity: .7}to {transform: translate(-100px, -6.25px)}}
.loading-image div:nth-child(3),
.loading-image div:nth-child(4),
.loading-image div:nth-child(5),
.loading-image div:nth-child(6){
background-color: #49b1f5;
width: 15px;
height: 15px;
border-radius: 100%;
margin: 2px;
width: 10px;
height: 10px;
position: absolute;
transform: translateY(-6.25px);
top: 25px;
left: 100px;
}
.loading-text{
margin-bottom: 20vh;
text-align: center;
color: #2c3e50;
font-size: 2rem;
box-sizing: border-box;
padding: 0 10px;
text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
@media only screen and (max-width: 500px) {
.loading-text{
font-size: 1.5rem;
}
}
.fadeout {
opacity: 0;
filter: alpha(opacity=0);
}
/* logo���ֶ��� */
@-webkit-keyframes fadeInDown{0%{opacity:0;-webkit-transform:translate3d(0,-100%,0);transform:translate3d(0,-100%,0)}100%{opacity:1;-webkit-transform:none;transform:none}}
@keyframes fadeInDown{0%{opacity:0;-webkit-transform:translate3d(0,-100%,0);}}
</style>
<script>
(function () {
const loaded = function(){
setTimeout(function(){
const loader = document.getElementById("loading-container");
loader.className="fadeout" ;//ʹ�ý����ķ�������loading page
// document.getElementById("body-wrap").style.display="flex";
setTimeout(function(){
loader.style.display="none";
},1000);
},1000);//ǿ����ʾloading page 1s
};
loaded();
})()
</script></head>
<div id="loading-container">
<p class="loading-text"></p>
<div class="loading-image">
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
</div>
</div><body>
<header class="navbar-fixed">
<nav id="headNav" class="bg-color nav-transparent">
<div id="navContainer" class="nav-wrapper container">
<div class="brand-logo">
<a href="/" class="waves-effect waves-light">
<img src="/medias/logo.png" class="logo-img" alt="LOGO">
<span class="logo-span">Ji`s Blog</span>
</a>
</div>
<a href="#" data-target="mobile-nav" class="sidenav-trigger button-collapse"><i class="fa fa-navicon"></i></a>
<ul class="right">
<li class="hide-on-med-and-down">
<a href="/" class="waves-effect waves-light">
<span>首页</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/tags" class="waves-effect waves-light">
<span>标签</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/categories" class="waves-effect waves-light">
<span>分类</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/archives" class="waves-effect waves-light">
<span>归档</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/about" class="waves-effect waves-light">
<span>关于</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/friends" class="waves-effect waves-light">
<span>友情链接</span>
</a>
</li>
<li class="hide-on-med-and-down">
<a href="/contact" class="waves-effect waves-light">
<span>留言板</span>
</a>
</li>
<li>
<a href="#searchModal" class="modal-trigger waves-effect waves-light">
<i id="searchIcon" class="fa fa-search" title="搜索"></i>
</a>
</li>
</ul>
<div id="mobile-nav" class="side-nav sidenav">
<div class="mobile-head bg-color">
<img src="/medias/logo.png" class="logo-img circle responsive-img">
<div class="logo-name">Ji`s Blog</div>
<div class="logo-desc">
Java | Spring | Redis
</div>
</div>
<ul class="menu-list mobile-menu-list">
<li>
<a href="/" class="waves-effect waves-light">
<i class="fa fa-fw fa-link"></i>
首页
</a>
</li>
<li>
<a href="/tags" class="waves-effect waves-light">
<i class="fa fa-fw fa-link"></i>
标签
</a>
</li>
<li>
<a href="/categories" class="waves-effect waves-light">
<i class="fa fa-fw fa-link"></i>
分类
</a>
</li>
<li>
<a href="/archives" class="waves-effect waves-light">
<i class="fa fa-fw fa-link"></i>
归档
</a>
</li>
<li>
<a href="/about" class="waves-effect waves-light">
<i class="fa fa-fw fa-link"></i>
关于
</a>
</li>
<li>
<a href="/friends" class="waves-effect waves-light">
<i class="fa fa-fw fa-link"></i>
友情链接
</a>
</li>
<li>
<a href="/contact" class="waves-effect waves-light">
<i class="fa fa-fw fa-link"></i>
留言板
</a>
</li>
<li><div class="divider"></div></li>
<li>
<a href="https://github.com/jiyongg-code" class="waves-effect waves-light" target="_blank">
<i class="fa fa-github-square fa-fw"></i>Fork Me
</a>
</li>
</ul>
</div>
</div>
<style>
.nav-transparent .github-corner {
display: none !important;
}
.github-corner {
position: absolute;
z-index: 10;
top: 0;
right: 0;
border: 0;
transform: scale(1.1);
}
.github-corner svg {
color: #0f9d58;
fill: #fff;
height: 64px;
width: 64px;
}
.github-corner:hover .octo-arm {
animation: a 0.56s ease-in-out;
}
.github-corner .octo-arm {
animation: none;
}
@keyframes a {
0%,
to {
transform: rotate(0);
}
20%,
60% {
transform: rotate(-25deg);
}
40%,
80% {
transform: rotate(10deg);
}
}
</style>
<a href="https://github.com/jiyongg-code" class="github-corner tooltipped hide-on-med-and-down" target="_blank"
data-tooltip="Fork Me" data-position="left" data-delay="50">
<svg viewBox="0 0 250 250" aria-hidden="true">
<path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path>
<path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2"
fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path>
<path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z"
fill="currentColor" class="octo-body"></path>
</svg>
</a>
</nav>
</header>
<script src="/libs/cryptojs/crypto-js.min.js"></script>
<script>
(function() {
let pwd = '';
if (pwd && pwd.length > 0) {
if (pwd !== CryptoJS.SHA256(prompt('请输入访问本文章的密码')).toString(CryptoJS.enc.Hex)) {
alert('密码错误，将返回主页！');
location.href = '/';
}
}
})();
</script>
<div class="bg-cover pd-header post-cover" style="background-image: url('/medias/featureimages/6.jpg')">
<div class="container">
<div class="row">
<div class="col s12 m12 l12">
<div class="brand">
<div class="description center-align post-title">
Springboot常用注解
</div>
</div>
</div>
</div>
</div>
</div>
<main class="post-container content">
<link rel="stylesheet" href="/libs/tocbot/tocbot.css">
<style>
#articleContent h1::before,
#articleContent h2::before,
#articleContent h3::before,
#articleContent h4::before,
#articleContent h5::before,
#articleContent h6::before {
display: block;
content: " ";
height: 100px;
margin-top: -100px;
visibility: hidden;
}
#articleContent :focus {
outline: none;
}
.toc-fixed {
position: fixed;
top: 64px;
}
.toc-widget {
padding-left: 20px;
}
.toc-widget .toc-title {
margin: 35px 0 15px 0;
padding-left: 17px;
font-size: 1.5rem;
font-weight: bold;
line-height: 1.5rem;
}
.toc-widget ol {
padding: 0;
list-style: none;
}
#toc-content ol {
padding-left: 10px;
}
#toc-content ol li {
padding-left: 10px;
}
#toc-content .toc-link:hover {
color: #42b983;
font-weight: 700;
text-decoration: underline;
}
#toc-content .toc-link::before {
background-color: transparent;
max-height: 25px;
}
#toc-content .is-active-link {
color: #42b983;
}
#toc-content .is-active-link::before {
background-color: #42b983;
}
#floating-toc-btn {
position: fixed;
right: 20px;
bottom: 76px;
padding-top: 15px;
margin-bottom: 0;
z-index: 998;
}
#floating-toc-btn .btn-floating {
width: 48px;
height: 48px;
}
#floating-toc-btn .btn-floating i {
line-height: 48px;
font-size: 1.4rem;
}
</style>
<div class="row">
<div id="main-content" class="col s12 m12 l9">
<!-- 文章内容详情 -->
<div id="artDetail">
<div class="card">
<div class="card-content article-info">
<div class="row tag-cate">
<div class="col s7">
<div class="article-tag">
<span class="chip bg-color">无标签</span>
</div>
</div>
<div class="col s5 right-align">
</div>
</div>
<div class="post-info">
<div class="post-date info-break-policy">
<i class="fa fa-calendar-minus-o fa-fw"></i>发布日期:
2023-08-06
</div>
<div class="post-author info-break-policy">
<i class="fa fa-user-o fa-fw"></i>作者:
jiyonggang
</div>
<div class="info-break-policy">
<i class="fa fa-file-word-o fa-fw"></i>文章字数:
1.9k
</div>
<div class="info-break-policy">
<i class="fa fa-clock-o fa-fw"></i>阅读时长:
7 分
</div>
<div id="busuanzi_container_page_pv" class="info-break-policy">
<i class="fa fa-eye fa-fw"></i>阅读次数:
<span id="busuanzi_value_page_pv"></span>
</div>
</div>
</div>
<hr class="clearfix">
<div class="card-content article-card-content">
<div id="articleContent">
<h1 id="RequestParm"><a href="#RequestParm" class="headerlink" title="@RequestParm"></a>@RequestParm</h1><p>@RequestParam是从请求体重获取参数值</p>
<pre><code>@ResponseBody
@RequestMapping(value = "/h",method = RequestMethod.GET)
public Map<String,Object> login( @RequestParam Integer param){
</code></pre><p>get方式请求<br><a href="http://localhost:8000/login/h?param" target="_blank" rel="noopener">http://localhost:8000/login/h?param</a> = 3</p>
<p><img src="/springboot-annotation/image-20230806201732350.png" alt="image-20230806201732350"></p>
<p>post方式请求<br><a href="http://localhost:8000/login/h" target="_blank" rel="noopener">http://localhost:8000/login/h</a></p>
<pre><code> @ResponseBody
@RequestMapping(value = "/h",method = RequestMethod.POST)
public Map<String,Object> login( @RequestParam Integer param){
</code></pre><p><img src="/springboot-annotation/image-20230806201921849.png" alt="image-20230806201921849"></p>
<h1 id="RequestBody"><a href="#RequestBody" class="headerlink" title="@RequestBody"></a>@RequestBody</h1><p>@RequestBody 将前台JSON 对象数据转换为后台可处理数据 (前台 -> 后台)</p>
<p>1.如果参数时放在请求体中，application/json传入后台的话，那么后台要用@RequestBody才能接收到；<br>2.如果不是放在请求体中的话，那么后台接收前台传过来的参数时，要用@RequestParam来接收，或者形参前 什么也不写也能接收。<br>3.如果参数前写了@RequestParam(xxx)，那么前端必须有对应的xxx名字才行(不管其是否有值，当然可以通过设置该注解的required属性来调节是否必须传)，如果没有xxx名的话，那么请求会出错，报400。</p>
<h1 id="ResponseBody"><a href="#ResponseBody" class="headerlink" title="@ResponseBody"></a>@ResponseBody</h1><p>@ResponseBody注解的作用是将controller的方法返回的对象通过适当的转换器转换为指定的格式之后，写入到response对象的body区，通常用来返回JSON数据或者是XML数据123。例如，如果您想返回一个Person对象的JSON数据，您可以在方法上加上@ResponseBody注解，然后直接返回Person对象，Spring框架会自动将其转换为JSON格式并写入到response对象的body区。</p>
<h1 id="PathVariable"><a href="#PathVariable" class="headerlink" title="@PathVariable"></a>@PathVariable</h1><p>@PathVariable是从url中获取请求值</p>
<p>get方式请求</p>
<pre><code> @ResponseBody
@RequestMapping(value = "/h/{param}",method = RequestMethod.GET)
public Map<String,Object> login1( @PathVariable Integer param){</code></pre><p>请求地址格式：<a href="http://localhost:8000/login/h/{param}" target="_blank" rel="noopener">http://localhost:8000/login/h/{param}</a><br><a href="http://localhost:8000/login/h/0" target="_blank" rel="noopener">http://localhost:8000/login/h/0</a></p>
<p><img src="/springboot-annotation/image-20230806202101454.png" alt="image-20230806202101454"></p>
<h1 id="PathParam"><a href="#PathParam" class="headerlink" title="@PathParam"></a>@PathParam</h1><p>@PathParam和@RequestParam具有相同的使用，都是重request的请求中获取值，@RequestParam属于Spring，@PathParam是在javax.websocket.server这个包下的类。</p>
<p>它是获取request中的值的</p>
<p>常用于传统请求方式，url例子为：</p>
<pre><code>http://localhost:8080/user/getUserByidAndName?id=a&&name=张三</code></pre><pre><code> @GetMapping("/getUserByidAndName")
public String getUserByidAndName(@PathParam("id") String id,@PathParam("name") String name){
return String.format("id=%s,name=%s", id,name);
}</code></pre><h2 id="通过一个bean来接收"><a href="#通过一个bean来接收" class="headerlink" title="通过一个bean来接收"></a>通过一个bean来接收</h2><pre><code>适用于GET 和 POST请求方式
建立一个和表单中参数对应的bean
@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
public class DemoUser {
private String username;
private String password;
}
用这个bean来封装接收的参数
@RestController
@RequestMapping("/tools")
public class InnerController {
@RequestMapping("/addUser3")
public String addUser3(DemoUser user) {
System.out.println("username is:"+user.getUsername());
System.out.println("password is:"+user.getPassword());
return "success";
}
}
</code></pre><h2 id="直接把表单的参数写在Controller相应的方法的形参中"><a href="#直接把表单的参数写在Controller相应的方法的形参中" class="headerlink" title="直接把表单的参数写在Controller相应的方法的形参中"></a>直接把表单的参数写在Controller相应的方法的形参中</h2><p>这种方式不会校验请求里是否带参数，即下面的username和password不带也会响应成功</p>
<p>适用于GET 和 POST请求方式</p>
<pre><code>@RestController
@RequestMapping("/tools")
public class InnerController {
@RequestMapping("/addUser1")
public String addUser1(String username,String password) {
System.out.println("username is:"+username);
System.out.println("password is:"+password);
return "success";
}
}
</code></pre><h1 id="RequestHeader"><a href="#RequestHeader" class="headerlink" title="@RequestHeader"></a>@RequestHeader</h1><p><code>@RequestHeader</code> 是Spring框架中的一个注解，用于从HTTP请求头中获取特定的信息，并将其映射到方法参数或类字段上。它的作用是用来获取HTTP请求头中的信息，例如请求的内容类型、授权信息、自定义的头部信息等。</p>
<ol>
<li><strong>获取特定HTTP请求头信息：</strong> 通过在Controller方法的参数中使用 <code>@RequestHeader</code> 注解，你可以获取HTTP请求中指定的头部信息，例如：</li>
</ol>
<pre><code>javaCopy code@GetMapping("/example")
public ResponseEntity<String> example(@RequestHeader("User-Agent") String userAgent) {
// 处理userAgent
}</code></pre><p>上述示例中，<code>@RequestHeader("User-Agent")</code> 用于获取HTTP请求头中的 “User-Agent” 头部信息，并将其映射到方法参数 <code>userAgent</code> 中。</p>
<ol>
<li><strong>获取多个HTTP请求头信息：</strong> 你可以使用 <code>@RequestHeader</code> 注解多次来获取多个不同的HTTP请求头信息，例如：</li>
</ol>
<pre><code>javaCopy code@GetMapping("/example")
public ResponseEntity<String> example(
@RequestHeader("User-Agent") String userAgent,
@RequestHeader("Authorization") String authorization
) {
// 处理userAgent和authorization
}</code></pre><p>这个方法同时获取了 “User-Agent” 和 “Authorization” 头部信息。</p>
<ol>
<li><strong>默认值和必需性：</strong> 你可以通过 <code>@RequestHeader</code> 的 <code>defaultValue</code> 属性为请求头指定默认值，以防请求中没有提供该头部信息。此外，你还可以使用 <code>@RequestHeader</code> 的 <code>required</code> 属性来指定头部信息是否是必需的，默认值为 <code>true</code>。</li>
</ol>
<pre><code>javaCopy code@GetMapping("/example")
public ResponseEntity<String> example(
@RequestHeader(value = "Authorization", required = false, defaultValue = "Guest") String authorization
) {
// 如果请求中没有提供 "Authorization" 头部信息，将使用默认值 "Guest"
}</code></pre><ol>
<li><strong>映射到类字段：</strong> 除了映射到方法参数，你还可以使用 <code>@RequestHeader</code> 注解将请求头信息映射到类的字段上。这在需要在多个方法中共享相同的请求头信息时很有用。</li>
</ol>
<pre><code>javaCopy code@RestController
public class MyController {
@RequestHeader("User-Agent")
private String userAgent;
@GetMapping("/example")
public ResponseEntity<String> example() {
// 使用类字段中的userAgent
}
}</code></pre><h1 id="ConditionalOnMissingBean"><a href="#ConditionalOnMissingBean" class="headerlink" title="@ConditionalOnMissingBean"></a>@ConditionalOnMissingBean</h1><p>@ConditionalOnMissingBean是一个用于修饰Bean的注解，它的作用是在项目启动时开始自动化配置注册生成Bean，当某个类型的Bean被注册之后，如果再注册相同类型的Bean就会失败，该注解会保证Spring容器中只有一个Bean类型的实例，当注册多个相同类型的Bean时，会出现异常。它可以用在@Configuration类或@Bean方法上，用来控制自动配置的条件。例如，下面的代码表示只有当RedisOperations类不存在时，才会创建一个RedisTemplate的Bean：</p>
<pre class="line-numbers language-java"><code class="language-java"><span class="token annotation punctuation">@Configuration</span>
<span class="token annotation punctuation">@ConditionalOnMissingBean</span><span class="token punctuation">(</span>RedisOperations<span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">RedisAutoConfiguration</span> <span class="token punctuation">{</span>
<span class="token annotation punctuation">@Bean</span>
<span class="token keyword">public</span> RedisTemplate<span class="token operator"><</span>Object<span class="token punctuation">,</span> Object<span class="token operator">></span> <span class="token function">redisTemplate</span><span class="token punctuation">(</span>
RedisConnectionFactory redisConnectionFactory<span class="token punctuation">)</span> <span class="token punctuation">{</span>
RedisTemplate<span class="token operator"><</span>Object<span class="token punctuation">,</span> Object<span class="token operator">></span> template <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">RedisTemplate</span><span class="token operator"><</span><span class="token operator">></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
template<span class="token punctuation">.</span><span class="token function">setConnectionFactory</span><span class="token punctuation">(</span>redisConnectionFactory<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> template<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h1 id="ConditionalOnClass"><a href="#ConditionalOnClass" class="headerlink" title="@ConditionalOnClass"></a>@ConditionalOnClass</h1><p>@ConditionalOnClass这个注解的作用是当类路径中存在指定的类时，才会使标有该注解的类或方法生效。它是Spring Boot提供的一个条件注解，用来控制自动配置的条件。它可以用在@Configuration类或@Bean方法上，用来判断是否需要创建某个Bean或执行某个配置。它有两个属性，value和name，分别可以指定类或类名。例如：</p>
<pre class="line-numbers language-java"><code class="language-java"><span class="token annotation punctuation">@Configuration</span>
<span class="token annotation punctuation">@ConditionalOnClass</span><span class="token punctuation">(</span>RedisOperations<span class="token punctuation">.</span><span class="token keyword">class</span><span class="token punctuation">)</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">RedisAutoConfiguration</span> <span class="token punctuation">{</span>
<span class="token annotation punctuation">@Bean</span>
<span class="token annotation punctuation">@ConditionalOnMissingBean</span><span class="token punctuation">(</span>name <span class="token operator">=</span> <span class="token string">"redisTemplate"</span><span class="token punctuation">)</span>
<span class="token keyword">public</span> RedisTemplate<span class="token operator"><</span>Object<span class="token punctuation">,</span> Object<span class="token operator">></span> <span class="token function">redisTemplate</span><span class="token punctuation">(</span>
RedisConnectionFactory redisConnectionFactory<span class="token punctuation">)</span> <span class="token punctuation">{</span>
RedisTemplate<span class="token operator"><</span>Object<span class="token punctuation">,</span> Object<span class="token operator">></span> template <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">RedisTemplate</span><span class="token operator"><</span><span class="token operator">></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
template<span class="token punctuation">.</span><span class="token function">setConnectionFactory</span><span class="token punctuation">(</span>redisConnectionFactory<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">return</span> template<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>这段代码表示只有当RedisOperations这个类存在于类路径中时，才会执行RedisAutoConfiguration这个配置类，并创建一个RedisTemplate的Bean。</p>
<h1 id="PreDestroy"><a href="#PreDestroy" class="headerlink" title="@PreDestroy"></a>@PreDestroy</h1><p>@PreDestroy的作用是在Bean销毁前执行一个方法，通常用于释放资源或者做一些清理工作。它是Java规范JSR-250中定义的一个注解，Spring框架支持这个注解，并且提供了相应的实现原理。@PreDestroy注解的使用方法如下：</p>
<ul>
<li>首先，需要在springboot的配置文件中设置消费者的确认模式为<strong>MANUAL</strong>，表示手动确认。</li>
<li>其次，需要在Bean的方法中添加@PreDestroy注解，指定要在Bean销毁前执行的方法。被@PreDestroy修饰的方法必须是非静态的void ()方法，而且不能有任何参数或者抛出异常。</li>
<li>然后，当Bean被销毁时，Spring框架会自动调用被@PreDestroy修饰的方法，并且只会调用一次。</li>
</ul>
<p>以下是一个简单的代码示例：</p>
<pre class="line-numbers language-java"><code class="language-java"><span class="token keyword">package</span> com<span class="token punctuation">.</span>example<span class="token punctuation">.</span>demo<span class="token punctuation">;</span>
<span class="token keyword">import</span> javax<span class="token punctuation">.</span>annotation<span class="token punctuation">.</span>PreDestroy<span class="token punctuation">;</span>
<span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">MyBean</span> <span class="token punctuation">{</span>
<span class="token keyword">public</span> <span class="token function">MyBean</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"MyBean 构造器执行"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token annotation punctuation">@PreDestroy</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">preDestroy</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"MyBean @PreDestroy 注解标注的方法执行"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">destroy</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
System<span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"MyBean destroy 方法执行"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p><a href="https://blog.csdn.net/aiwokache/article/details/129037252" target="_blank" rel="noopener">Spring Boot接收从前端传过来的数据常用方式以及处理的技巧_后端接受前端数据的方式_aiwokache的博客-CSDN博客</a></p>
</div>
<hr />
<style>
#reward {
margin: 40px 0;
text-align: center;
}
#reward .reward-link {
font-size: 1.88rem;
}
#reward .btn-floating:hover {
box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2), 0 5px 15px rgba(0, 0, 0, 0.2);
}
#rewardModal {
width: 320px;
height: 350px;
}
#rewardModal .reward-title {
margin: 15px auto;
padding-bottom: 5px;
}
#rewardModal .modal-content {
padding: 10px;
}
#rewardModal .close {
position: absolute;
right: 15px;
top: 15px;
color: rgba(0, 0, 0, 0.5);
font-size: 1.3rem;
line-height: 20px;
cursor: pointer;
}
#rewardModal .close:hover {
color: #ef5350;
transform: scale(1.3);
-moz-transform:scale(1.3);
-webkit-transform:scale(1.3);
-o-transform:scale(1.3);
}
#rewardModal .reward-tabs {
margin: 0 auto;
width: 210px;
}
.reward-tabs .tabs {
height: 38px;
margin: 10px auto;
padding-left: 0;