{"id":331,"date":"2020-04-14T14:17:52","date_gmt":"2020-04-14T06:17:52","guid":{"rendered":"https:\/\/blog.humh.cn\/?p=331"},"modified":"2020-06-01T18:08:31","modified_gmt":"2020-06-01T10:08:31","slug":"%e6%b5%85%e8%b0%88servlet-response","status":"publish","type":"post","link":"https:\/\/blog.humh.cn\/?p=331","title":{"rendered":"\u6d45\u8c08servlet response"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\"><p>\u5728\u91cd\u590d\u4f7f\u7528<code>response.sendRedirect()<\/code>\u65f6\u5019\uff0c\u62a5\u4e86\u201c<strong>Cannot call sendRedirect() after the response has been committed<\/strong>\u201d\u8fd9\u4e2a\u9519\u8bef\u3002\u4e8e\u662f\u67e5\u627e\u539f\u56e0\u5206\u6790\uff0cservlet response\u673a\u5236\u6240\u81f4\u3002<\/p><\/blockquote>\n\n\n\n<p> \u603b\u7ed3\u4e00\u4e0b\uff0c\u73b0\u9636\u6bb5\u5bf9\u4e8eservlet response\u7684\u7406\u89e3\u3002 <\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<p>response\u662f\u670d\u52a1\u7aef\u5bf9\u5ba2\u6237\u7aef\u8bf7\u6c42\u505a\u51fa\u54cd\u5e94\u7684\u4e00\u4e2a\u5c01\u88c5\uff0c\u91cc\u9762\u5305\u542b\u4e86\u54cd\u5e94\u5934\uff0c\u72b6\u6001\u7801\u4ee5\u53ca\u54cd\u5e94\u4f53\u5185\u5bb9\u7b49\u3002\u670d\u52a1\u7aef\u5728\u5c06\u54cd\u5e94response\u8fd4\u56de\u81f3\u5ba2\u6237\u7aef\uff08\u6d4f\u89c8\u5668\uff09\u524d\uff0c\u662f\u5c06\u5185\u5bb9\uff08header\u54cd\u5e94\u5934\uff0c\u72b6\u6001\u7801\u7b49\uff09\u5199\u5230\u7f13\u5b58\u533a\u4e2d\u7684\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a href=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247.png\"><img width=\"1024\" height=\"374\" class=\"wp-image-332 lazyload\" title=\"\u6d45\u8c08servlet response\" src=\"data:image\/gif;base64,R0lGODlhAgABAIAAALGxsQAAACH5BAAAAAAALAAAAAACAAEAAAICBAoAOw==\" data-src=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-1024x374.png\" alt=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-1024x374.png\" data-srcset=\"https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-1024x374.png 1024w, https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-300x110.png 300w, https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-768x280.png 768w, https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247.png 1213w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/a><\/figure><\/div>\n\n\n\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u5e73\u5e38\u5728\u8c03\u7528<code>response.getWriter()<\/code>print\u6216write\u5199\u54cd\u5e94\u4f53\u5185\u5bb9\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u770b\u5230\u5e95\u5c42\u662f\u4f1a\u8c03\u7528OutputBuffer\uff0c\u5c06\u5185\u5bb9\u5199\u5165\u7f13\u5b58\u533a\u3002<br>\u5f53\u7136\u5199\u5165\u7f13\u5b58\u533a\uff0c\u8fd9\u662f\u5728\u54cd\u5e94response\u4e0d\u8d85\u8fc7\u7f13\u5b58\u533a\u5927\u5c0f\u7684\u524d\u63d0\u4e0b\uff0c\u5982\u679c\u8d85\u8fc7\u7f13\u5b58\u533a\u5927\u5c0f\uff0c\u5c31\u4f1a\u76f4\u63a5flush\u81f3\u5ba2\u6237\u7aef\uff08\u6d4f\u89c8\u5668\uff09\u3002\u7f13\u5b58\u533a\u7684\u673a\u5236\u5c31\u662f\u4e3a\u4e86\u8f83\u5c11\u7f51\u7edc\u4f20\u8f93\u7684\u6b21\u6570\uff0c\u63d0\u9ad8\u7f51\u7edc\u4f20\u8f93\u901f\u5ea6\u3002<br>\u5f53response\u5185\u5bb9\u5199\u5230\u7f13\u5b58\u4e2d\u540e\uff0c\u4e5f\u662f\u5c06\u6240\u6709\u5185\u5bb9flush\uff0c\u5c06\u7f13\u5b58\u533a\u5185\u5bb9\u4f20\u8f93\u5ba2\u6237\u7aef\uff0c\u540c\u65f6\u7f13\u5b58\u533a\u6e05\u7a7a\u3002\u5982\u4e0b\u56fe\uff0c<code>response.sendRedirect()<\/code> \u4e2d\u7684\u4e00\u6bb5\u4ee3\u7801\uff0c\u5c31\u662f\u8fd9\u6837\u3002\uff08\u6211\u4eec\u5e73\u5e38\u901a\u8fc7\u6d41\u5bf9\u54cd\u5e94\u5199\u5165\u540e\uff0cclose()\u5173\u95ed\u6d41\u65f6\uff0c\u5176\u5185\u90e8\u4e5f\u662f\u5982\u6b64\uff09<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a href=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-2.png\"><img width=\"796\" height=\"598\" class=\"wp-image-334 lazyload\" title=\"\u6d45\u8c08servlet response\" src=\"data:image\/gif;base64,R0lGODlhAgABAIAAALGxsQAAACH5BAAAAAAALAAAAAACAAEAAAICBAoAOw==\" data-src=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-2.png\" alt=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-2.png\" data-srcset=\"https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-2.png 796w, https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-2-300x225.png 300w, https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-2-768x577.png 768w\" sizes=\"(max-width: 796px) 100vw, 796px\"><\/a><\/figure><\/div>\n\n\n\n<p>\u6700\u540e\u518d\u5c06\u8be5response\u6807\u8bb0\u4e3acommitted\u3001\u5b8c\u6210\u7b49\uff08response\u4e2d\u5b9a\u4e49\u4e86\u591a\u4e2a\u6807\u5fd7\u4f4d\u5b57\u6bb5\uff09\u3002\u53ef\u4ee5\u770b\u5230\u5728sendRedirect\u6700\u7ec8\u5904\u7406\u524d\uff0c\u5176\u4e2d\u5df2\u7ecf\u5c06\u72b6\u6001\u4f4d\u6807\u8bb0\uff0c\u6765\u8868\u793a\u6b64\u6b21\u8bf7\u6c42\u5df2\u7ecf\u54cd\u5e94\u5b8c\u6210\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a href=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-3.png\"><img width=\"665\" height=\"332\" class=\"wp-image-335 lazyload\" title=\"\u6d45\u8c08servlet response\" src=\"data:image\/gif;base64,R0lGODlhAgABAIAAALGxsQAAACH5BAAAAAAALAAAAAACAAEAAAICBAoAOw==\" data-src=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-3.png\" alt=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-3.png\" data-srcset=\"https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-3.png 665w, https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-3-300x150.png 300w\" sizes=\"(max-width: 665px) 100vw, 665px\"><\/a><\/figure><\/div>\n\n\n\n<p>\u5982\u679c\u518d\u6b21\u5bf9\u8be5response\u8bbe\u7f6e\u91cd\u5b9a\u5411\u7684\u8bdd\uff0c\u4f1a\u5148\u5224\u65ad\u6807\u5fd7\u4f4d<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a href=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-4.png\"><img width=\"685\" height=\"233\" class=\"wp-image-337 lazyload\" title=\"\u6d45\u8c08servlet response\" src=\"data:image\/gif;base64,R0lGODlhAgABAIAAALGxsQAAACH5BAAAAAAALAAAAAACAAEAAAICBAoAOw==\" data-src=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-4.png\" alt=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-4.png\" data-srcset=\"https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-4.png 685w, https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-4-300x102.png 300w\" sizes=\"(max-width: 685px) 100vw, 685px\"><\/a><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><a href=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-5.png\"><img width=\"635\" height=\"142\" class=\"wp-image-338 lazyload\" title=\"\u6d45\u8c08servlet response\" src=\"data:image\/gif;base64,R0lGODlhAgABAIAAALGxsQAAACH5BAAAAAAALAAAAAACAAEAAAICBAoAOw==\" data-src=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-5.png\" alt=\"https:\/\/file.blog.humh.cn\/2020\/04\/\u56fe\u7247-5.png\" data-srcset=\"https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-5.png 635w, https:\/\/file.blog.humh.cn\/wp-content\/uploads\/2020\/04\/\u56fe\u7247-5-300x67.png 300w\" sizes=\"(max-width: 635px) 100vw, 635px\"><\/a><\/figure><\/div>\n\n\n\n<p>\u663e\u7136\u5728\u4e0a\u4e00\u6b21\u8c03\u7528\u5b8c<code>sendRedirect()<\/code>\u7684\u65f6\u5019\uff0c\u5df2\u7ecfcommit\u4e86\uff0c\u518d\u6b21\u8c03\u7528\u7684\u65f6\u5019\uff08\u6216\u8005\u8c03\u7528\u5176\u4ed6\u65b9\u6cd5\u5bf9response\u8fdb\u884c\u6539\u5199\uff09\uff0c\u5c31\u4f1a\u62a5\u5f00\u5934\u6240\u8bf4\u7684\u9519\u8bef\u3002\u6240\u4ee5\u4e00\u822c\u8c03\u7528\u5b8c<code>sendRedirect()<\/code>\u540e\u5c31\u76f4\u63a5<code>return<\/code>\u4e86\u3002<\/p>\n\n\n\n<p>response\u652f\u6301\u5728commit\u54cd\u5e94\u5b8c\u6210\u524d\uff0c\u91cd\u7f6e\u7f13\u5b58\u533a<code>reset()<\/code>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u91cd\u590d\u4f7f\u7528response.sendRedirect()\u65f6\u5019\uff0c\u62a5\u4e86\u201cCannot call sendRedir [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[51],"tags":[35,47],"_links":{"self":[{"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/posts\/331"}],"collection":[{"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=331"}],"version-history":[{"count":2,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/posts\/331\/revisions"}],"predecessor-version":[{"id":339,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/posts\/331\/revisions\/339"}],"wp:attachment":[{"href":"https:\/\/blog.humh.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}