{"id":65535,"date":"2025-05-03T15:07:51","date_gmt":"2025-05-03T07:07:51","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65535\/"},"modified":"2025-05-03T15:07:51","modified_gmt":"2025-05-03T07:07:51","slug":"java%e6%80%8e%e4%b9%88%e8%ae%be%e7%bd%ae%e6%95%b0%e7%bb%84%e7%b1%bb%e5%b1%9e%e6%80%a7-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65535\/","title":{"rendered":"java\u600e\u4e48\u8bbe\u7f6e\u6570\u7ec4\u7c7b\u5c5e\u6027"},"content":{"rendered":"

\n java \u4e2d\u8bbe\u7f6e\u6570\u7ec4\u7684\u5c5e\u6027\u5305\u62ec\u4ee5\u4e0b\u6b65\u9aa4\uff1a\u83b7\u53d6\u6570\u7ec4\u5bf9\u8c61 class \u5bf9\u8c61\u3001\u83b7\u53d6\u5c5e\u6027\u7684 field \u5bf9\u8c61\u3001\u5c06 field \u5bf9\u8c61\u8bbe\u7f6e\u4e3a\u53ef\u8bbf\u95ee\u3001\u8bbe\u7f6e\u5c5e\u6027\u503c\u3001\u9a8c\u8bc1\u662f\u5426\u6210\u529f\u8bbe\u7f6e\u3002\u9700\u8981\u6ce8\u610f\uff0c\u6570\u7ec4\u5143\u7d20\u65e0\u6cd5\u76f4\u63a5\u8bbe\u7f6e\uff0c\u56e0\u4e3a\u6570\u7ec4\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u5bf9\u8c61\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u8bbe\u7f6e\u6570\u7ec4\u7c7b\u5c5e\u6027\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u8bbe\u7f6e Java \u4e2d\u6570\u7ec4\u7684\u5c5e\u6027<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u5bf9\u8c61\uff0c\u56e0\u6b64\u5b83\u652f\u6301\u5c5e\u6027\u7684\u8bbe\u7f6e\u548c\u83b7\u53d6\u3002\u8981\u8bbe\u7f6e\u6570\u7ec4\u7684\u5c5e\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

    \n
  1. \n

    \u521b\u5efa\u6570\u7ec4\uff1a<\/strong><\/p>\n

    int[] numbers = new int[10];<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  2. \n
    \u83b7\u53d6\u6570\u7ec4\u5bf9\u8c61\u7684 Class \u5bf9\u8c61\uff1a<\/strong><\/p>\n
    \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
    Class<?> class = numbers.getClass();<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  3. \n
    \u83b7\u53d6\u8981\u8bbe\u7f6e\u7684\u5c5e\u6027\u7684 Field \u5bf9\u8c61\uff1a<\/strong><\/p>\n
    Field field = class.getDeclaredField(\"length\");<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  4. \n
    \u5c06 Field \u5bf9\u8c61\u8bbe\u7f6e\u4e3a\u53ef\u8bbf\u95ee\uff1a<\/strong><\/p>\n
    field.setAccessible(true);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  5. \n
    \u8bbe\u7f6e\u5c5e\u6027\u503c\uff1a<\/strong><\/p>\n
    field.setInt(numbers, 20);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  6. \n
    \u9a8c\u8bc1\u662f\u5426\u6210\u529f\u8bbe\u7f6e\uff1a<\/strong><\/p>\n
    System.out.println(Arrays.toString(numbers)); \/\/ \u8f93\u51fa\uff1a[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ol>\n
    \u6ce8\u610f\uff1a<\/strong><\/p>\n
      \n
    • \u8bbe\u7f6e\u6570\u7ec4\u5c5e\u6027\u9700\u8981\u76f4\u63a5\u8bbf\u95ee\u5176\u79c1\u6709\u5b57\u6bb5\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528 setAccessible(true) \u6765\u7981\u7528 Java \u7684\u8bbf\u95ee\u63a7\u5236\u68c0\u67e5\u3002<\/li>\n
    • \u8bbe\u7f6e\u7684\u5c5e\u6027\u5fc5\u987b\u662f\u6570\u7ec4\u7c7b\u4e2d\u58f0\u660e\u7684\u5c5e\u6027\uff0c\u5426\u5219\u4f1a\u629b\u51fa NoSuchFieldException \u5f02\u5e38\u3002<\/li>\n
    • \u6570\u7ec4\u5143\u7d20\u672c\u8eab\u65e0\u6cd5\u76f4\u63a5\u8bbe\u7f6e\uff0c\u56e0\u4e3a\u6570\u7ec4\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u8bbe\u7f6e\u6570\u7ec4\u7c7b\u5c5e\u6027\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      java \u4e2d\u8bbe\u7f6e\u6570\u7ec4\u7684\u5c5e\u6027\u5305\u62ec\u4ee5\u4e0b\u6b65\u9aa4\uff1a\u83b7\u53d6\u6570\u7ec4\u5bf9\u8c61 class \u5bf9\u8c61\u3001\u83b7\u53d6\u5c5e\u6027\u7684 field \u5bf9\u8c61\u3001\u5c06 field \u5bf9\u8c61\u8bbe\u7f6e\u4e3a\u53ef\u8bbf\u95ee\u3001\u8bbe\u7f6e\u5c5e\u6027\u503c\u3001\u9a8c\u8bc1\u662f\u5426\u6210\u529f\u8bbe\u7f6e\u3002\u9700\u8981\u6ce8\u610f\uff0c\u6570\u7ec4\u5143\u7d20\u65e0\u6cd5\u76f4\u63a5\u8bbe\u7f6e\uff0c\u56e0\u4e3a\u6570\u7ec4\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u5bf9\u8c61\u3002 \u5982\u4f55\u8bbe\u7f6e Java \u4e2d\u6570\u7ec4\u7684\u5c5e\u6027 \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u5bf9\u8c61\uff0c\u56e0\u6b64\u5b83\u652f\u6301\u5c5e\u6027\u7684\u8bbe\u7f6e\u548c\u83b7\u53d6\u3002\u8981\u8bbe\u7f6e\u6570\u7ec4\u7684\u5c5e\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a \u521b\u5efa\u6570\u7ec4\uff1a int[] numbers = new int[10]; \u767b\u5f55\u540e\u590d\u5236 \u83b7\u53d6\u6570\u7ec4\u5bf9\u8c61\u7684 Class \u5bf9\u8c61\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b Class<?> class = numbers.getClass(); \u767b\u5f55\u540e\u590d\u5236 \u83b7\u53d6\u8981\u8bbe\u7f6e\u7684\u5c5e\u6027\u7684 Field \u5bf9\u8c61\uff1a Field field = class.getDeclaredField(“length”); \u767b\u5f55\u540e\u590d\u5236 \u5c06 Field \u5bf9\u8c61\u8bbe\u7f6e\u4e3a\u53ef\u8bbf\u95ee\uff1a field.setAccessible(true); \u767b\u5f55\u540e\u590d\u5236 \u8bbe\u7f6e\u5c5e\u6027\u503c\uff1a field.setInt(numbers, 20); \u767b\u5f55\u540e\u590d\u5236 \u9a8c\u8bc1\u662f\u5426\u6210\u529f\u8bbe\u7f6e\uff1a System.out.println(Arrays.toString(numbers)); \/\/ \u8f93\u51fa\uff1a[0, 0, 0, 0, 0, […]<\/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-65535","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65535","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=65535"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65535\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}