{"id":37070,"date":"2024-11-26T11:02:06","date_gmt":"2024-11-26T03:02:06","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37070\/"},"modified":"2024-11-26T11:02:06","modified_gmt":"2024-11-26T03:02:06","slug":"java%e6%80%8e%e4%b9%88%e8%a7%a3%e6%9e%90json%e5%af%b9%e8%b1%a1%e6%95%b0%e7%bb%84%e5%af%b9%e8%b1%a1%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37070\/","title":{"rendered":"java\u600e\u4e48\u89e3\u6790json\u5bf9\u8c61\u6570\u7ec4\u5bf9\u8c61\u6570\u7ec4"},"content":{"rendered":"

\n \u5728java\u4e2d\u89e3\u6790\u5305\u542b\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4\u7684json\uff0c\u53ef\u4ee5\u4f7f\u7528jackson\u5e93\uff1a\u5bfc\u5165\u5e93\uff1aimport com.fasterxml.jackson.databind.objectmapper;\u521b\u5efaobjectmapper\u5bf9\u8c61\uff1aobjectmapper mapper = new objectmapper();\u89e3\u6790json\uff1ajsonnode root = mapper.readtree(jsonstring);\u83b7\u53d6\u5bf9\u8c61\u6570\u7ec4\uff1ajsonnode objectsarray = root.get(“objects”\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u89e3\u6790json\u5bf9\u8c61\u6570\u7ec4\u5bf9\u8c61\u6570\u7ec4\u63d2\u56fe\"<\/p>\n

Java\u89e3\u6790JSON\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4<\/strong><\/p>\n

\u95ee\u9898\uff1a<\/strong>\u5982\u4f55\u5728Java\u4e2d\u89e3\u6790\u5305\u542b\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4\u7684JSON\uff1f<\/p>\n

\u56de\u7b54\uff1a<\/strong><\/p>\n

\u4f7f\u7528Java\u89e3\u6790JSON\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528Jackson\u5e93\u3002\u5b83\u662f\u4e00\u4e2a\u6d41\u884c\u4e14\u529f\u80fd\u5f3a\u5927\u7684JSON\u5904\u7406\u5e93\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u5c06JSON\u8f6c\u6362\u4e3aJava\u5bf9\u8c61\u3002<\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

\u4ee5\u4e0b\u662f\u89e3\u6790JSON\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4\u7684\u8be6\u7ec6\u6b65\u9aa4\uff1a<\/p>\n

    \n
  1. \n

    \u5bfc\u5165Jackson\u5e93\uff1a<\/strong><\/p>\n

    import com.fasterxml.jackson.databind.ObjectMapper;<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  2. \n
    \u521b\u5efaObjectMapper\u5bf9\u8c61\uff1a<\/strong><\/p>\n
    ObjectMapper mapper = new ObjectMapper();<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  3. \n
    \u89e3\u6790JSON\uff1a<\/strong><\/p>\n
    JsonNode root = mapper.readTree(jsonString);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  4. \n
    \u83b7\u53d6\u5bf9\u8c61\u6570\u7ec4\uff1a<\/strong>
    \u83b7\u53d6\u6839\u8282\u70b9\uff0c\u7136\u540e\u4f7f\u7528get(“key”)\u65b9\u6cd5\u83b7\u53d6\u5305\u542b\u5bf9\u8c61\u6570\u7ec4\u7684\u8282\u70b9\u3002<\/p>\n
    JsonNode objectsArray = root.get(\"objects\");<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  5. \n
    \u904d\u5386\u5bf9\u8c61\u6570\u7ec4\uff1a<\/strong>
    \u4f7f\u7528isArray()\u65b9\u6cd5\u68c0\u67e5\u8282\u70b9\u662f\u5426\u4e3a\u6570\u7ec4\uff0c\u7136\u540e\u4f7f\u7528elements()\u65b9\u6cd5\u904d\u5386\u6570\u7ec4\u3002<\/p>\n
    if (objectsArray.isArray()) {\n Iterator<JsonNode> elements = objectsArray.elements();\n while (elements.hasNext()) {\n     JsonNode object = elements.next();\n     \/\/ \u89e3\u6790\u5bf9\u8c61\u5185\u7684\u5185\u5bb9\n }\n}<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  6. \n
    \u83b7\u53d6\u5d4c\u5957\u6570\u7ec4\uff1a<\/strong>
    \u5bf9\u8c61\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u53ef\u80fd\u5305\u542b\u5d4c\u5957\u6570\u7ec4\u3002\u83b7\u53d6\u5143\u7d20\u8282\u70b9\uff0c\u7136\u540e\u4f7f\u7528\u76f8\u540c\u7684get(“key”)\u65b9\u6cd5\u83b7\u53d6\u5305\u542b\u5d4c\u5957\u6570\u7ec4\u7684\u8282\u70b9\u3002<\/p>\n
    JsonNode nestedArray = object.get(\"nestedArray\");<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  7. \n
    \u904d\u5386\u5d4c\u5957\u6570\u7ec4\uff1a<\/strong>
    \u4e0e\u5bf9\u8c61\u6570\u7ec4\u7c7b\u4f3c\uff0c\u904d\u5386\u5d4c\u5957\u6570\u7ec4\u5e76\u89e3\u6790\u5176\u5143\u7d20\u3002<\/p>\n
    if (nestedArray.isArray()) {\n Iterator<JsonNode> elements = nestedArray.elements();\n while (elements.hasNext()) {\n     JsonNode element = elements.next();\n     \/\/ \u89e3\u6790\u5143\u7d20\u5185\u7684\u5185\u5bb9\n }\n}<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ol>\n
    \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u89e3\u6790json\u5bf9\u8c61\u6570\u7ec4\u5bf9\u8c61\u6570\u7ec4\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728java\u4e2d\u89e3\u6790\u5305\u542b\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4\u7684json\uff0c\u53ef\u4ee5\u4f7f\u7528jackson\u5e93\uff1a\u5bfc\u5165\u5e93\uff1aimport com.fasterxml.jackson.databind.objectmapper;\u521b\u5efaobjectmapper\u5bf9\u8c61\uff1aobjectmapper mapper = new objectmapper();\u89e3\u6790json\uff1ajsonnode root = mapper.readtree(jsonstring);\u83b7\u53d6\u5bf9\u8c61\u6570\u7ec4\uff1ajsonnode objectsarray = root.get(“objects” Java\u89e3\u6790JSON\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4 \u95ee\u9898\uff1a\u5982\u4f55\u5728Java\u4e2d\u89e3\u6790\u5305\u542b\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4\u7684JSON\uff1f \u56de\u7b54\uff1a \u4f7f\u7528Java\u89e3\u6790JSON\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528Jackson\u5e93\u3002\u5b83\u662f\u4e00\u4e2a\u6d41\u884c\u4e14\u529f\u80fd\u5f3a\u5927\u7684JSON\u5904\u7406\u5e93\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u5c06JSON\u8f6c\u6362\u4e3aJava\u5bf9\u8c61\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4ee5\u4e0b\u662f\u89e3\u6790JSON\u5bf9\u8c61\u6570\u7ec4\u5d4c\u5957\u6570\u7ec4\u7684\u8be6\u7ec6\u6b65\u9aa4\uff1a \u5bfc\u5165Jackson\u5e93\uff1a import com.fasterxml.jackson.databind.ObjectMapper; \u767b\u5f55\u540e\u590d\u5236 \u521b\u5efaObjectMapper\u5bf9\u8c61\uff1a ObjectMapper mapper = new ObjectMapper(); \u767b\u5f55\u540e\u590d\u5236 \u89e3\u6790JSON\uff1a JsonNode root = mapper.readTree(jsonString); \u767b\u5f55\u540e\u590d\u5236 \u83b7\u53d6\u5bf9\u8c61\u6570\u7ec4\uff1a\u83b7\u53d6\u6839\u8282\u70b9\uff0c\u7136\u540e\u4f7f\u7528get(“key”)\u65b9\u6cd5\u83b7\u53d6\u5305\u542b\u5bf9\u8c61\u6570\u7ec4\u7684\u8282\u70b9\u3002 JsonNode objectsArray = root.get(“objects”); \u767b\u5f55\u540e\u590d\u5236 \u904d\u5386\u5bf9\u8c61\u6570\u7ec4\uff1a\u4f7f\u7528isArray()\u65b9\u6cd5\u68c0\u67e5\u8282\u70b9\u662f\u5426\u4e3a\u6570\u7ec4\uff0c\u7136\u540e\u4f7f\u7528elements()\u65b9\u6cd5\u904d\u5386\u6570\u7ec4\u3002 if (objectsArray.isArray()) { Iterator<JsonNode> elements = objectsArray.elements(); while (elements.hasNext()) { JsonNode object = […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-37070","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37070","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=37070"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37070\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37070"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37070"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}