{"id":4256,"date":"2019-01-15T12:06:07","date_gmt":"2019-01-15T04:06:07","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=4256"},"modified":"2019-01-15T12:06:07","modified_gmt":"2019-01-15T04:06:07","slug":"java%e4%b8%ad%e7%9a%84%e4%b8%80%e4%ba%9b%e5%9f%ba%e7%a1%80%e4%bb%a3%e7%a0%81%e7%89%87%e6%ae%b5_5-2","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/4256.html","title":{"rendered":"Java\u4e2d\u7684\u4e00\u4e9b\u57fa\u7840\u4ee3\u7801\u7247\u6bb5_5"},"content":{"rendered":"<p>=Start=<\/p>\n<h4 id=\"id-\u6a21\u677f-\u7f18\u7531\uff1a\">\u7f18\u7531\uff1a<\/h4>\n<p>\u73b0\u5728\u5f88\u5c11\u505a\u7eafJava\u5f00\u53d1\u7684\u5de5\u4f5c\uff0c\u4f46\u6709\u65f6\u5019\u53c8\u5c11\u4e0d\u4e86\u7528Java\u5b9e\u73b0\u4e00\u4e9b\u529f\u80fd\uff0c\u5bf9\u4e8e\u90e8\u5206\u5e38\u89c1\u7684\u529f\u80fd\u4e0d\u5e94\u8be5\u6bcf\u6b21\u90fd\u53bb\u5373\u65f6Google\uff0c\u4e00\u4e2a\u662f\u6d6a\u8d39\u65f6\u95f4\uff0c\u518d\u4e00\u4e2a\u662f\u7f3a\u5c11\u79ef\u7d2f\uff0c\u6240\u4ee5\uff0c\u6bcf\u9694\u4e00\u6bb5\u65f6\u95f4\u5c31\u5c1d\u8bd5\u7740\u628a\u6700\u8fd1\u78b0\u5230\u7684\u95ee\u9898\u3001\u65b9\u6cd5\u8bb0\u5f55\u4e00\u4e0b\uff0c\u65b9\u4fbf\u4ee5\u540e\u53c2\u8003\u3002<\/p>\n<h4 id=\"id-\u6a21\u677f-\u6b63\u6587\uff1a\">\u6b63\u6587\uff1a<\/h4>\n<h5 id=\"id-\u6a21\u677f-\u53c2\u8003\u89e3\u7b54\uff1a\">\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n<h6>1\u3001\u5b57\u7b26\u4e32\u5224\u7b49<\/h6>\n<p><span style=\"color: #ff0000;\"><strong>\u9762\u8bd5\u9898\uff1a\u8bf7\u89e3\u91ca\u5b57\u7b26\u4e32\u6bd4\u8f83\u4e4b\u4e2d\u201c==\u201d\u548cequals()\u7684\u533a\u522b\uff1f<\/strong><\/span><\/p>\n<ul>\n<li>\u00a0==\uff1a\u6bd4\u8f83\u7684\u662f\u4e24\u4e2a\u5b57\u7b26\u4e32\u5185\u5b58\u5730\u5740\uff08\u5806\u5185\u5b58\uff09\u7684\u6570\u503c\u662f\u5426\u76f8\u7b49\uff0c\u5c5e\u4e8e\u6570\u503c\u6bd4\u8f83\uff1b<\/li>\n<li>\u00a0equals()\uff1a\u6bd4\u8f83\u7684\u662f\u4e24\u4e2a\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\uff0c\u5c5e\u4e8e\u5185\u5bb9\u6bd4\u8f83\u3002<\/li>\n<\/ul>\n<p><span style=\"color: #ff0000;\"><strong>\u4ee5\u540e\u8fdb\u884c\u5b57\u7b26\u4e32\u76f8\u7b49\u5224\u65ad\u7684\u65f6\u5019\u90fd\u4f7f\u7528equals()\u3002<\/strong><\/span><\/p>\n<p><strong>\u4e00\u3001Java\u4e2d\u7684\u6570\u636e\u7c7b\u578b\u548c\u201c==\u201d\u7684\u542b\u4e49\uff1a<\/strong><\/p>\n<ul>\n<li>\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff08\u4e5f\u79f0\u539f\u59cb\u6570\u636e\u7c7b\u578b\uff09\uff1abyte,short,char,int,long,float,double,boolean\u3002\u5b83\u4eec\u4e4b\u95f4\u7684\u6bd4\u8f83\uff0c\u5e94\u7528\u53cc\u7b49\u53f7\uff08==\uff09\uff0c\u56e0\u4e3a\u8981\u6bd4\u8f83\u7684\u662f\u5b83\u4eec\u7684\u503c\u3002<\/li>\n<li>\u5f15\u7528\u6570\u636e\u7c7b\u578b\uff1a\u5f53\u5b83\u4eec\u7528\uff08==\uff09\u8fdb\u884c\u6bd4\u8f83\u7684\u65f6\u5019\uff0c\u6bd4\u8f83\u7684\u662f\u5b83\u4eec\u5728\u5185\u5b58\u4e2d\u7684\u5b58\u653e\u5730\u5740\uff08\u786e\u5207\u7684\u8bf4\uff0c\u662f<strong>\u5806\u5185\u5b58<\/strong>\u5730\u5740\uff09\u3002<\/li>\n<\/ul>\n<p>\u6ce8\uff1a\u5bf9\u4e8e\u7b2c\u4e8c\u79cd\u7c7b\u578b\uff0c\u9664\u975e\u662f\u540c\u4e00\u4e2anew\u51fa\u6765\u7684\u5bf9\u8c61\uff0c\u5b83\u4eec\u7684\u6bd4\u8f83\u540e\u7684\u7ed3\u679c\u4e3atrue\uff0c\u5426\u5219\u6bd4\u8f83\u540e\u7ed3\u679c\u4e3afalse\u3002\u56e0\u4e3a\u6bcfnew\u4e00\u6b21\uff0c\u90fd\u4f1a\u91cd\u65b0\u5f00\u8f9f\u5806\u5185\u5b58\u7a7a\u95f4\u3002<\/p>\n<p><strong>\u4e8c\u3001Java\u4e2d\u7684equals()\u65b9\u6cd5\u4ecb\u7ecd\uff1a<\/strong><\/p>\n<p>Java\u5f53\u4e2d\u6240\u6709\u7684\u7c7b\u90fd\u662f\u7ee7\u627f\u4e8eObject\u8fd9\u4e2a\u8d85\u7c7b\u7684\uff0c\u5728Object\u7c7b\u4e2d\u5b9a\u4e49\u4e86\u4e00\u4e2aequals\u7684\u65b9\u6cd5\uff0cequals\u7684\u6e90\u7801\u662f\u8fd9\u6837\u5199\u7684\uff1a<\/p>\n<pre class=\"lang:default decode:true \">public boolean equals(Object obj) {\r\n    \/\/this - s1\r\n    \/\/obj - s2\r\n    return (this == obj);\r\n}<\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u7684\u521d\u59cb\u9ed8\u8ba4\u884c\u4e3a\u662f\u6bd4\u8f83\u5bf9\u8c61\u7684\u5185\u5b58\u5730\u5740\u503c\uff0c\u4e00\u822c\u6765\u8bf4\uff0c\u610f\u4e49\u4e0d\u5927\u3002\u6240\u4ee5\uff0c\u5728\u4e00\u4e9b\u7c7b\u5e93\u5f53\u4e2d\u8fd9\u4e2a\u65b9\u6cd5\u88ab\u91cd\u5199\u4e86\uff0c\u5982String\u3001Integer\u3001Date\u3002\u5728\u8fd9\u4e9b\u7c7b\u5f53\u4e2dequals\u6709\u5176\u81ea\u8eab\u7684\u5b9e\u73b0\uff08\u4e00\u822c\u90fd\u662f\u7528\u6765\u6bd4\u8f83\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u503c\u662f\u5426\u76f8\u540c\uff09\uff0c\u800c\u4e0d\u518d\u662f\u6bd4\u8f83\u7c7b\u5728\u5806\u5185\u5b58\u4e2d\u7684\u5b58\u653e\u5730\u5740\u4e86\u3002\u00a0\u6240\u4ee5\u8bf4\uff0c\u5bf9\u4e8e\u590d\u5408\u6570\u636e\u7c7b\u578b\u4e4b\u95f4\u8fdb\u884cequals\u6bd4\u8f83\uff0c\u5728\u6ca1\u6709\u8986\u5199equals\u65b9\u6cd5\u7684\u60c5\u51b5\u4e0b\uff0c\u4ed6\u4eec\u4e4b\u95f4\u7684\u6bd4\u8f83\u8fd8\u662f\u5185\u5b58\u4e2d\u7684\u5b58\u653e\u4f4d\u7f6e\u7684\u5730\u5740\u503c\uff0c\u8ddf\u53cc\u7b49\u53f7\uff08==\uff09\u7684\u7ed3\u679c\u76f8\u540c\uff1b\u5982\u679c\u88ab\u590d\u5199\uff0c\u6309\u7167\u590d\u5199\u7684\u8981\u6c42\u6765\u3002<\/p>\n<p>&nbsp;<\/p>\n<h6>2\u3001\u5b57\u7b26(\u4e32)\u66ff\u6362<\/h6>\n<p>\u4f7f\u7528\u300c\u53cc\u5f15\u53f7\u300d\u5305\u88f9\uff08\u5373\u4fbf\u9700\u8981\u8f6c\u4e49\uff09\uff0c\u800c\u4e0d\u7528\u300c\u5355\u5f15\u53f7\u300d\u5305\u88f9\u3002<\/p>\n<pre class=\"lang:default decode:true \">message = message.replaceAll(\",\", \"\\\",\\\"\").replaceAll(\":\", \"\\\":\\\"\").replaceAll(\" \", \"\");\r\n\r\nwifiObject.getString(\"ssid\").replace(\"\\\"\", \"\").toLowerCase();\r\n<\/pre>\n<p>&nbsp;<\/p>\n<h6>3\u3001json\u6570\u7ec4\u89e3\u6790<\/h6>\n<pre class=\"lang:default decode:true \">\/\/ String wifiStr = \"[{\\\"bssid\\\":\\\"12:34:56:78:c4:90\\\",\\\"ssid\\\":\\\"wifi-1\\\"},{\\\"bssid\\\":\\\"12:34:56:78:c4:a9\\\",\\\"ssid\\\":\\\"wifi-2\\\"},{\\\"bssid\\\":\\\"12:34:56:78:c4:a8\\\",\\\"ssid\\\":\\\"wifi-3\\\"}]\";\r\n\r\nString wifiStr = dataObject.getString(\"wifiList\");\r\nif (wifiStr == null || \"unknown\".equals(wifiStr.toLowerCase()) || !wifiStr.startsWith(\"[\")) {\r\n    return null;\r\n}\r\nJSONArray wifiList = dataObject.getJSONArray(\"wifiList\");\r\nJSONObject wifiObject = null;\r\nfor (int i = 0; i &lt; wifiList.size(); i++) {\r\n    wifiObject = wifiList.getJSONObject(i);\r\n    System.out.println(\"wifi_name: \" + wifiObject.getString(\"ssid\").replace(\"\\\"\", \"\").toLowerCase());\r\n    System.out.println(\"wifi_mac: \" + wifiObject.getString(\"bssid\"));\r\n}<\/pre>\n<p>&nbsp;<\/p>\n<h6>4\u3001\u4e00\u4e9bJava\u57fa\u7840\u7f16\u7a0b\u7ec3\u4e60\u9898\u8d44\u6e90<\/h6>\n<ul>\n<li><a href=\"https:\/\/blog.csdn.net\/wolfchou\/article\/details\/11965001\">20\u4e2a\u5e38\u7528\u7684java\u4ee3\u7801\u7247\u6bb5<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/chengjun77\/article\/details\/78040120\">50\u9053JAVA\u57fa\u7840\u7f16\u7a0b\u7ec3\u4e60\u9898<\/a><\/li>\n<li><a href=\"https:\/\/juejin.im\/post\/58a4276f61ff4b006c899609\">50\u9053Java\u57fa\u7840\u7f16\u7a0b\u7ec3\u4e60\u9898<\/a><\/li>\n<li><a href=\"http:\/\/www.phpxs.com\/code\/java\/\">\u5206\u7c7b\uff1ajava \u4ee3\u7801\u7247\u6bb5<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h5 id=\"id-\u6a21\u677f-\u53c2\u8003\u94fe\u63a5\uff1a\">\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n<ul>\n<li><a href=\"https:\/\/www.cnblogs.com\/smyhvae\/p\/3929585.html\">Java\u8bed\u6cd5&#8212;-Java\u4e2dequals\u548c==\u7684\u533a\u522b<\/a><\/li>\n<li><a href=\"https:\/\/www.cnblogs.com\/zhxhdean\/archive\/2011\/03\/25\/1995431.html\">Java\u4e2dequals\u548c==\u7684\u533a\u522b<\/a><\/li>\n<li><a href=\"https:\/\/www.zhihu.com\/question\/26872848\">\u5982\u4f55\u8bb0\u4f4f string==null \u548c string.equals(&#8220;&#8221;) \u7684\u533a\u522b\uff1f<\/a><\/li>\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/7520432\/what-is-the-difference-between-and-equals-in-java\">What is the difference between == and equals() in Java?<\/a><\/li>\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/5216272\/replace-string-with-another-in-java\">Java\u4e2d\u5b57\u7b26\u4e32\u66ff\u6362\u2014\u2014\u4f7f\u7528\u300c\u53cc\u5f15\u53f7\u300d\u5305\u88f9\uff0c\u800c\u975e\u300c\u5355\u5f15\u53f7\u300d<\/a><br \/>\n<a href=\"https:\/\/stackoverflow.com\/questions\/1234510\/how-do-i-replace-a-character-in-a-string-in-java\">https:\/\/stackoverflow.com\/questions\/1234510\/how-do-i-replace-a-character-in-a-string-in-java<\/a><\/li>\n<li><a href=\"https:\/\/my.oschina.net\/sulliy\/blog\/499834\">fastjson\u7684JSONArray\u548cJSONObject<\/a><\/li>\n<li><a href=\"https:\/\/www.cnblogs.com\/longshiyVip\/p\/5380645.html\">FastJSON \u7b80\u4ecb\u53ca\u5176Map\/JSON\/String \u4e92\u8f6c<\/a><\/li>\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/18977144\/how-to-parse-json-array-not-json-object-in-android\">How to parse JSON Array (Not Json Object) in Android<\/a><\/li>\n<\/ul>\n<p>=END=<\/p>\n","protected":false},"excerpt":{"rendered":"<p>=Start= \u7f18\u7531\uff1a \u73b0\u5728\u5f88\u5c11\u505a\u7eafJava\u5f00\u53d1\u7684\u5de5\u4f5c\uff0c\u4f46\u6709\u65f6\u5019\u53c8\u5c11\u4e0d\u4e86\u7528Java\u5b9e\u73b0\u4e00\u4e9b\u529f\u80fd\uff0c\u5bf9\u4e8e\u90e8\u5206\u5e38\u89c1\u7684 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7],"tags":[1293,61,1294],"class_list":["post-4256","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-programing","tag-equals","tag-java","tag-replace"],"views":7223,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=4256"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4256\/revisions"}],"predecessor-version":[{"id":4257,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4256\/revisions\/4257"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=4256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=4256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=4256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}