“`” \u8003\u5bdf\u70b9\uff1aJVM<\/p>\n
\u5982\u4e0b\u56fe\u6240\u793a\uff0cJVM\u7c7b\u52a0\u8f7d\u673a\u5236\u5206\u4e3a\u4e94\u4e2a\u90e8\u5206\uff1a\u52a0\u8f7d\uff0c\u9a8c\u8bc1\uff0c\u51c6\u5907\uff0c\u89e3\u6790\uff0c\u521d\u59cb\u5316\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u5206\u522b\u6765\u770b\u4e00\u4e0b\u8fd9\u4e94\u4e2a\u8fc7\u7a0b\u3002<\/p>\n
<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20180926\/308572_1537962641528_95106A90F455887E4A4B298735A4641B""><\/p>\n
\u52a0\u8f7d<\/p>\n
\u52a0\u8f7d\u662f\u7c7b\u52a0\u8f7d\u8fc7\u7a0b\u4e2d\u7684\u4e00\u4e2a\u9636\u6bb5\uff0c\u8fd9\u4e2a\u9636\u6bb5\u4f1a\u5728\u5185\u5b58\u4e2d\u751f\u6210\u4e00\u4e2a\u4ee3\u8868\u8fd9\u4e2a\u7c7b\u7684java.lang.Class\u5bf9\u8c61\uff0c\u4f5c\u4e3a\u65b9\u6cd5\u533a\u8fd9\u4e2a\u7c7b\u7684\u5404\u79cd\u6570\u636e\u7684\u5165\u53e3\u3002\u6ce8\u610f\u8fd9\u91cc\u4e0d\u4e00\u5b9a\u975e\u5f97\u8981\u4ece\u4e00\u4e2aClass\u6587\u4ef6\u83b7\u53d6\uff0c\u8fd9\u91cc\u65e2\u53ef\u4ee5\u4eceZIP\u5305\u4e2d\u8bfb\u53d6\uff08\u6bd4\u5982\u4ecejar\u5305\u548cwar\u5305\u4e2d\u8bfb\u53d6\uff09\uff0c\u4e5f\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u8ba1\u7b97\u751f\u6210\uff08\u52a8\u6001\u4ee3\u7406\uff09\uff0c\u4e5f\u53ef\u4ee5\u7531\u5176\u5b83\u6587\u4ef6\u751f\u6210\uff08\u6bd4\u5982\u5c06JSP\u6587\u4ef6\u8f6c\u6362\u6210\u5bf9\u5e94\u7684Class\u7c7b\uff09\u3002<\/p>\n
\u9a8c\u8bc1<\/p>\n
\u8fd9\u4e00\u9636\u6bb5\u7684\u4e3b\u8981\u76ee\u7684\u662f\u4e3a\u4e86\u786e\u4fddClass\u6587\u4ef6\u7684\u5b57\u8282\u6d41\u4e2d\u5305\u542b\u7684\u4fe1\u606f\u662f\u5426\u7b26\u5408\u5f53\u524d\u865a\u62df\u673a\u7684\u8981\u6c42\uff0c\u5e76\u4e14\u4e0d\u4f1a\u5371\u5bb3\u865a\u62df\u673a\u81ea\u8eab\u7684\u5b89\u5168\u3002<\/p>\n
\u51c6\u5907<\/p>\n
\u51c6\u5907\u9636\u6bb5\u662f\u6b63\u5f0f\u4e3a\u7c7b\u53d8\u91cf\u5206\u914d\u5185\u5b58\u5e76\u8bbe\u7f6e\u7c7b\u53d8\u91cf\u7684\u521d\u59cb\u503c\u9636\u6bb5\uff0c\u5373\u5728\u65b9\u6cd5\u533a\u4e2d\u5206\u914d\u8fd9\u4e9b\u53d8\u91cf\u6240\u4f7f\u7528\u7684\u5185\u5b58\u7a7a\u95f4\u3002\u6ce8\u610f\u8fd9\u91cc\u6240\u8bf4\u7684\u521d\u59cb\u503c\u6982\u5ff5\uff0c\u6bd4\u5982\u4e00\u4e2a\u7c7b\u53d8\u91cf\u5b9a\u4e49\u4e3a\uff1a<\/p>\n
public static int v = 8080;<\/p>\n
\u5b9e\u9645\u4e0a\u53d8\u91cfv\u5728\u51c6\u5907\u9636\u6bb5\u8fc7\u540e\u7684\u521d\u59cb\u503c\u4e3a0\u800c\u4e0d\u662f8080\uff0c\u5c06v\u8d4b\u503c\u4e3a8080\u7684putstatic\u6307\u4ee4\u662f\u7a0b\u5e8f\u88ab\u7f16\u8bd1\u540e\uff0c\u5b58\u653e\u4e8e\u7c7b\u6784\u9020\u5668<client>\u65b9\u6cd5\u4e4b\u4e2d\uff0c\u8fd9\u91cc\u6211\u4eec\u540e\u9762\u4f1a\u89e3\u91ca\u3002<\/client><\/p>\n
\u4f46\u662f\u6ce8\u610f\u5982\u679c\u58f0\u660e\u4e3a\uff1a<\/p>\n
public static final int v = 8080;<\/p>\n
\u5728\u7f16\u8bd1\u9636\u6bb5\u4f1a\u4e3av\u751f\u6210ConstantValue\u5c5e\u6027\uff0c\u5728\u51c6\u5907\u9636\u6bb5\u865a\u62df\u673a\u4f1a\u6839\u636eConstantValue\u5c5e\u6027\u5c06v\u8d4b\u503c\u4e3a8080\u3002<\/p>\n
\u89e3\u6790<\/p>\n
\u89e3\u6790\u9636\u6bb5\u662f\u6307\u865a\u62df\u673a\u5c06\u5e38\u91cf\u6c60\u4e2d\u7684\u7b26\u53f7\u5f15\u7528\u66ff\u6362\u4e3a\u76f4\u63a5\u5f15\u7528\u7684\u8fc7\u7a0b\u3002\u7b26\u53f7\u5f15\u7528\u5c31\u662fclass\u6587\u4ef6\u4e2d\u7684\uff1a<\/p>\n
CONSTANT_Class_info<\/p>\n
CONSTANT_Field_info<\/p>\n
CONSTANT_Method_info<\/p>\n
\u7b49\u7c7b\u578b\u7684\u5e38\u91cf\u3002<\/p>\n
\u4e0b\u9762\u6211\u4eec\u89e3\u91ca\u4e00\u4e0b\u7b26\u53f7\u5f15\u7528\u548c\u76f4\u63a5\u5f15\u7528\u7684\u6982\u5ff5\uff1a<\/p>\n
\u7b26\u53f7\u5f15\u7528\u4e0e\u865a\u62df\u673a\u5b9e\u73b0\u7684\u5e03\u5c40\u65e0\u5173\uff0c\u5f15\u7528\u7684\u76ee\u6807\u5e76\u4e0d\u4e00\u5b9a\u8981\u5df2\u7ecf\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002\u5404\u79cd\u865a\u62df\u673a\u5b9e\u73b0\u7684\u5185\u5b58\u5e03\u5c40\u53ef\u4ee5\u5404\u4e0d\u76f8\u540c\uff0c\u4f46\u662f\u5b83\u4eec\u80fd\u63a5\u53d7\u7684\u7b26\u53f7\u5f15\u7528\u5fc5\u987b\u662f\u4e00\u81f4\u7684\uff0c\u56e0\u4e3a\u7b26\u53f7\u5f15\u7528\u7684\u5b57\u9762\u91cf\u5f62\u5f0f\u660e\u786e\u5b9a\u4e49\u5728Java\u865a\u62df\u673a\u89c4\u8303\u7684Class\u6587\u4ef6\u683c\u5f0f\u4e2d\u3002<\/p>\n
\u76f4\u63a5\u5f15\u7528\u53ef\u4ee5\u662f\u6307\u5411\u76ee\u6807\u7684\u6307\u9488\uff0c\u76f8\u5bf9\u504f\u79fb\u91cf\u6216\u662f\u4e00\u4e2a\u80fd\u95f4\u63a5\u5b9a\u4f4d\u5230\u76ee\u6807\u7684\u53e5\u67c4\u3002\u5982\u679c\u6709\u4e86\u76f4\u63a5\u5f15\u7528\uff0c\u90a3\u5f15\u7528\u7684\u76ee\u6807\u5fc5\u5b9a\u5df2\u7ecf\u5728\u5185\u5b58\u4e2d\u5b58\u5728\u3002<\/p>\n
\u521d\u59cb\u5316<\/p>\n
\u521d\u59cb\u5316\u9636\u6bb5\u662f\u7c7b\u52a0\u8f7d\u6700\u540e\u4e00\u4e2a\u9636\u6bb5\uff0c\u524d\u9762\u7684\u7c7b\u52a0\u8f7d\u9636\u6bb5\u4e4b\u540e\uff0c\u9664\u4e86\u5728\u52a0\u8f7d\u9636\u6bb5\u53ef\u4ee5\u81ea\u5b9a\u4e49\u7c7b\u52a0\u8f7d\u5668\u4ee5\u5916\uff0c\u5176\u5b83\u64cd\u4f5c\u90fd\u7531JVM\u4e3b\u5bfc\u3002\u5230\u4e86\u521d\u59cb\u9636\u6bb5\uff0c\u624d\u5f00\u59cb\u771f\u6b63\u6267\u884c\u7c7b\u4e2d\u5b9a\u4e49\u7684Java\u7a0b\u5e8f\u4ee3\u7801\u3002<\/p>\n
\u521d\u59cb\u5316\u9636\u6bb5\u662f\u6267\u884c\u7c7b\u6784\u9020\u5668<client>\u65b9\u6cd5\u7684\u8fc7\u7a0b\u3002<client>\u65b9\u6cd5\u662f\u7531\u7f16\u8bd1\u5668\u81ea\u52a8\u6536\u96c6\u7c7b\u4e2d\u7684\u7c7b\u53d8\u91cf\u7684\u8d4b\u503c\u64cd\u4f5c\u548c\u9759\u6001\u8bed\u53e5\u5757\u4e2d\u7684\u8bed\u53e5\u5408\u5e76\u800c\u6210\u7684\u3002\u865a\u62df\u673a\u4f1a\u4fdd\u8bc1<client>\u65b9\u6cd5\u6267\u884c\u4e4b\u524d\uff0c\u7236\u7c7b\u7684<client>\u65b9\u6cd5\u5df2\u7ecf\u6267\u884c\u5b8c\u6bd5\u3002p.s: \u5982\u679c\u4e00\u4e2a\u7c7b\u4e2d\u6ca1\u6709\u5bf9\u9759\u6001\u53d8\u91cf\u8d4b\u503c\u4e5f\u6ca1\u6709\u9759\u6001\u8bed\u53e5\u5757\uff0c\u90a3\u4e48\u7f16\u8bd1\u5668\u53ef\u4ee5\u4e0d\u4e3a\u8fd9\u4e2a\u7c7b\u751f\u6210<client>()\u65b9\u6cd5\u3002<\/client><\/client><\/client><\/client><\/client><\/p>\n
\u6ce8\u610f\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\u4e0d\u4f1a\u6267\u884c\u7c7b\u521d\u59cb\u5316\uff1a<\/p>\n
\u901a\u8fc7\u5b50\u7c7b\u5f15\u7528\u7236\u7c7b\u7684\u9759\u6001\u5b57\u6bb5\uff0c\u53ea\u4f1a\u89e6\u53d1\u7236\u7c7b\u7684\u521d\u59cb\u5316\uff0c\u800c\u4e0d\u4f1a\u89e6\u53d1\u5b50\u7c7b\u7684\u521d\u59cb\u5316\u3002<\/p>\n
\u5b9a\u4e49\u5bf9\u8c61\u6570\u7ec4\uff0c\u4e0d\u4f1a\u89e6\u53d1\u8be5\u7c7b\u7684\u521d\u59cb\u5316\u3002<\/p>\n
\u5e38\u91cf\u5728\u7f16\u8bd1\u671f\u95f4\u4f1a\u5b58\u5165\u8c03\u7528\u7c7b\u7684\u5e38\u91cf\u6c60\u4e2d\uff0c\u672c\u8d28\u4e0a\u5e76\u6ca1\u6709\u76f4\u63a5\u5f15\u7528\u5b9a\u4e49\u5e38\u91cf\u7684\u7c7b\uff0c\u4e0d\u4f1a\u89e6\u53d1\u5b9a\u4e49\u5e38\u91cf\u6240\u5728\u7684\u7c7b\u3002<\/p>\n
\u901a\u8fc7\u7c7b\u540d\u83b7\u53d6Class\u5bf9\u8c61\uff0c\u4e0d\u4f1a\u89e6\u53d1\u7c7b\u7684\u521d\u59cb\u5316\u3002<\/p>\n
\u901a\u8fc7Class.forName\u52a0\u8f7d\u6307\u5b9a\u7c7b\u65f6\uff0c\u5982\u679c\u6307\u5b9a\u53c2\u6570initialize\u4e3afalse\u65f6\uff0c\u4e5f\u4e0d\u4f1a\u89e6\u53d1\u7c7b\u521d\u59cb\u5316\uff0c\u5176\u5b9e\u8fd9\u4e2a\u53c2\u6570\u662f\u544a\u8bc9\u865a\u62df\u673a\uff0c\u662f\u5426\u8981\u5bf9\u7c7b\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n
\u901a\u8fc7ClassLoader\u9ed8\u8ba4\u7684loadClass\u65b9\u6cd5\uff0c\u4e5f\u4e0d\u4f1a\u89e6\u53d1\u521d\u59cb\u5316\u52a8\u4f5c\u3002<\/p>\n
\u7c7b\u52a0\u8f7d\u5668<\/p>\n
\u865a\u62df\u673a\u8bbe\u8ba1\u56e2\u961f\u628a\u52a0\u8f7d\u52a8\u4f5c\u653e\u5230JVM\u5916\u90e8\u5b9e\u73b0\uff0c\u4ee5\u4fbf\u8ba9\u5e94\u7528\u7a0b\u5e8f\u51b3\u5b9a\u5982\u4f55\u83b7\u53d6\u6240\u9700\u7684\u7c7b\uff0cJVM\u63d0\u4f9b\u4e863\u79cd\u7c7b\u52a0\u8f7d\u5668\uff1a<\/p>\n
\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668(Bootstrap ClassLoader)\uff1a\u8d1f\u8d23\u52a0\u8f7d JAVA_HOME\\lib \u76ee\u5f55\u4e2d\u7684\uff0c\u6216\u901a\u8fc7-Xbootclasspath\u53c2\u6570\u6307\u5b9a\u8def\u5f84\u4e2d\u7684\uff0c\u4e14\u88ab\u865a\u62df\u673a\u8ba4\u53ef\uff08\u6309\u6587\u4ef6\u540d\u8bc6\u522b\uff0c\u5982rt.jar\uff09\u7684\u7c7b\u3002<\/p>\n
\u6269\u5c55\u7c7b\u52a0\u8f7d\u5668(Extension ClassLoader)\uff1a\u8d1f\u8d23\u52a0\u8f7d JAVA_HOME\\lib\\ext \u76ee\u5f55\u4e2d\u7684\uff0c\u6216\u901a\u8fc7java.ext.dirs\u7cfb\u7edf\u53d8\u91cf\u6307\u5b9a\u8def\u5f84\u4e2d\u7684\u7c7b\u5e93\u3002<\/p>\n
\u5e94\u7528\u7a0b\u5e8f\u7c7b\u52a0\u8f7d\u5668(Application ClassLoader)\uff1a\u8d1f\u8d23\u52a0\u8f7d\u7528\u6237\u8def\u5f84\uff08classpath\uff09\u4e0a\u7684\u7c7b\u5e93\u3002<\/p>\n
JVM\u901a\u8fc7\u53cc\u4eb2\u59d4\u6d3e\u6a21\u578b\u8fdb\u884c\u7c7b\u7684\u52a0\u8f7d\uff0c\u5f53\u7136\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u7ee7\u627fjava.lang.ClassLoader\u5b9e\u73b0\u81ea\u5b9a\u4e49\u7684\u7c7b\u52a0\u8f7d\u5668\u3002<\/p>\n
<img alt=""img"" referrerpolicy=""no-referrer"" src=""https:\/\/uploadfiles.nowcoder.com\/images\/20180926\/308572_1537962385800_7142B8354CA8A352B2B805F997C71549""><\/p>\n
\u5f53\u4e00\u4e2a\u7c7b\u52a0\u8f7d\u5668\u6536\u5230\u7c7b\u52a0\u8f7d\u4efb\u52a1\uff0c\u4f1a\u5148\u4ea4\u7ed9\u5176\u7236\u7c7b\u52a0\u8f7d\u5668\u53bb\u5b8c\u6210\uff0c\u56e0\u6b64\u6700\u7ec8\u52a0\u8f7d\u4efb\u52a1\u90fd\u4f1a\u4f20\u9012\u5230\u9876\u5c42\u7684\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\uff0c\u53ea\u6709\u5f53\u7236\u7c7b\u52a0\u8f7d\u5668\u65e0\u6cd5\u5b8c\u6210\u52a0\u8f7d\u4efb\u52a1\u65f6\uff0c\u624d\u4f1a\u5c1d\u8bd5\u6267\u884c\u52a0\u8f7d\u4efb\u52a1\u3002\u91c7\u7528\u53cc\u4eb2\u59d4\u6d3e\u7684\u4e00\u4e2a\u597d\u5904\u662f\u6bd4\u5982\u52a0\u8f7d\u4f4d\u4e8ert.jar\u5305\u4e2d\u7684\u7c7bjava.lang.Object\uff0c\u4e0d\u7ba1\u662f\u54ea\u4e2a\u52a0\u8f7d\u5668\u52a0\u8f7d\u8fd9\u4e2a\u7c7b\uff0c\u6700\u7ec8\u90fd\u662f\u59d4\u6258\u7ed9\u9876\u5c42\u7684\u542f\u52a8\u7c7b\u52a0\u8f7d\u5668\u8fdb\u884c\u52a0\u8f7d\uff0c\u8fd9\u6837\u5c31\u4fdd\u8bc1\u4e86\u4f7f\u7528\u4e0d\u540c\u7684\u7c7b\u52a0\u8f7d\u5668\u6700\u7ec8\u5f97\u5230\u7684\u90fd\u662f\u540c\u6837\u4e00\u4e2aObject\u5bf9\u8c61\u3002<\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” \u8003\u5bdf\u70b9\uff1aJVM \u5982\u4e0b\u56fe\u6240\u793a\uff0cJVM\u7c7b\u52a0\u8f7d\u673a\u5236\u5206\u4e3a\u4e94\u4e2a\u90e8\u5206\uff1a\u52a0\u8f7d\uff0c\u9a8c\u8bc1\uff0c\u51c6\u5907\uff0c\u89e3 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-39141","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/39141","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=39141"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/39141\/revisions"}],"predecessor-version":[{"id":39142,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/39141\/revisions\/39142"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=39141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=39141"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=39141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}