{"id":203485,"date":"2025-05-22T11:59:58","date_gmt":"2025-05-22T03:59:58","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203485\/"},"modified":"2025-05-22T11:59:58","modified_gmt":"2025-05-22T03:59:58","slug":"%e5%a6%82%e4%bd%95%e4%bf%9d%e7%95%99-json-%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%b8%ad%e7%9a%84-null-%e5%80%bc%ef%bc%8c%e8%bd%ac%e6%8d%a2%e6%88%90-json-%e5%af%b9%e8%b1%a1%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203485\/","title":{"rendered":"\u5982\u4f55\u4fdd\u7559 JSON \u5b57\u7b26\u4e32\u4e2d\u7684 null \u503c\uff0c\u8f6c\u6362\u6210 JSON \u5bf9\u8c61\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u4fdd\u7559 JSON \u5b57\u7b26\u4e32\u4e2d\u7684 null \u503c\uff0c\u8f6c\u6362\u6210 JSON \u5bf9\u8c61\uff1f<\/h1>\n<p>IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300a\u5982\u4f55\u4fdd\u7559 JSON \u5b57\u7b26\u4e32\u4e2d\u7684 null \u503c\uff0c\u8f6c\u6362\u6210 JSON \u5bf9\u8c61\uff1f\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241109\/1731151297672f45c121619.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u4fdd\u7559 json \u5b57\u7b26\u4e32\u4e2d\u7684 null \u503c\uff0c\u8f6c\u6362\u6210 json \u5bf9\u8c61<\/strong><\/p>\n<p>\u5728\u8f6c\u6362 json \u5b57\u7b26\u4e32\u6210 json \u5bf9\u8c61\u65f6\uff0c\u5982\u679c\u539f\u59cb\u5b57\u7b26\u4e32\u4e2d\u5b58\u5728 null \u503c\uff0c\u4f7f\u7528 jsonobject.parseobject(text) \u4f1a\u5bfc\u81f4\u4e22\u5931\u8fd9\u4e9b null \u503c\u3002\u89e3\u51b3\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<p>\u5728\u8f6c\u6362\u8fc7\u7a0b\u4e2d\uff0c\u4f7f\u7528 serializerfeature.writemapnullvalue \u7279\u6027\u3002\u6b64\u7279\u6027\u53ef\u4fdd\u7559 json \u5bf9\u8c61\u4e2d\u7684 null \u503c\u3002\u5177\u4f53\u4f7f\u7528\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>string str = \"{userid:1,nickname:null}\";\nstring jsonobject = jsonobject.tojsonstring(str, serializerfeature.writemapnullvalue);\nsystem.out.println(jsonobject);<\/pre>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<pre>{\"userId\":1,\"nickName\":null}<\/pre>\n<p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u4fdd\u7559 json \u5b57\u7b26\u4e32\u4e2d\u7684 null \u503c\uff0c\u5728\u8f6c\u6362\u4e3a json \u5bf9\u8c61\u65f6\u4e5f\u4e0d\u4f1a\u4e22\u5931\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u4fdd\u7559 JSON \u5b57\u7b26\u4e32\u4e2d\u7684 null \u503c\uff0c\u8f6c\u6362\u6210 JSON \u5bf9\u8c61\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u4f55\u4fdd\u7559 JSON \u5b57\u7b26\u4e32\u4e2d\u7684 &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203485","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203485","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203485"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203485\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203485"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203485"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}