{"id":4718,"date":"2019-11-02T21:58:50","date_gmt":"2019-11-02T12:58:50","guid":{"rendered":"https:\/\/chat-messenger.com\/?p=4718"},"modified":"2024-01-14T02:34:30","modified_gmt":"2024-01-13T17:34:30","slug":"%e6%95%b4%e6%95%b8%e8%a7%a3%e6%9e%90%e7%9a%84%e5%ad%97%e4%b8%b2%e5%80%bc","status":"publish","type":"post","link":"https:\/\/chat-messenger.com\/zh_tw\/blog\/java\/string-valueof-integer-parseint","title":{"rendered":"Java \u6578\u5b57\u5230\u5b57\u4e32\u5230\u65e5\u671f\u7684\u8f49\u63db"},"content":{"rendered":"<h2 class=\"wp-block-heading\">\u6578\u5b57\u5230\u5b57\u4e32\u7684\u8f49\u63db<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u5b57\u4e32\u7684\u904e\u7a0b\u662f\uff1a<strong>String.valueof()<\/strong> \u6211\u5011\u5c07\u4f7f\u7528\u9019\u500b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">String str = String.valueOf(num);<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u9084\u6709\u5176\u4ed6\u5beb\u6cd5\u53ef\u4ee5\u9019\u6a23\u8868\u9054\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">String str = Integer.toString(num);\nString str = \"\" + num;<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u5f8c\u300c+num\u300d\u5229\u7528\u4e86Java\u7684\u4e00\u500b\u7279\u6027\uff0c\u5373\u7576\u6578\u5b57\u8207\u5b57\u4e32\u9023\u63a5\u6642\uff0c\u6578\u5b57\u6703\u88ab\u8996\u70ba\u5b57\u4e32\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u5f8c\u4e00\u7a2e\u65b9\u6cd5\u7de8\u5beb\u8d77\u4f86\u6700\u7c21\u55ae\uff0c\u4f46\u5c0d\u65bc\u4e0d\u719f\u6089 Java \u7279\u6027\u7684\u4eba\u4f86\u8aaa\uff0c\u53ef\u80fd\u9700\u8981\u4e00\u4e9b\u6642\u9593\u624d\u80fd\u7406\u89e3\u5176\u610f\u5716\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b57\u4e32\u5230\u6578\u5b57\u7684\u8f49\u63db<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c07\u5b57\u4e32\u8f49\u63db\u70ba\u6578\u5b57\u7684\u904e\u7a0b\u662f\uff1a<strong>Integer.parseInt()<\/strong> \u6211\u5011\u5c07\u4f7f\u7528\u9019\u500b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">int num = Integer.parseInt(str);<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8acb\u6ce8\u610f\uff0c\u5982\u679c\u56e0\u4efb\u4f55\u539f\u56e0\uff08\u4f8b\u5982\u8f38\u5165\u5305\u542b\u4e0d\u7b26\u5408\u6307\u5b9a\u8cc7\u6599\u985e\u578b\u7684\u6587\u5b57\u6216\u6578\u5b57\uff09\u5c0e\u81f4\u8f49\u63db\u5931\u6557\uff0c\u5247\u6703\u62cb\u51fa NumberFormatException \u4f8b\u5916\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u65e5\u671f\u5230\u5b57\u4e32\u7684\u8f49\u63db<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u5b57\u4e32\u6bd4\u5c07\u6578\u5b57\u8f49\u63db\u70ba\u5b57\u4e32\u7a0d\u5fae\u8907\u96dc\u4e00\u4e9b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e00\u7684 <strong>\u7c21\u55ae\u65e5\u671f\u683c\u5f0f<\/strong> \u5efa\u7acb[\u8a72\u7269\u4ef6]\u7684\u4e00\u500b\u5be6\u4f8b\u3002\u65e5\u671f\u683c\u5f0f\u5728\u5efa\u7acb\u904e\u7a0b\u4e2d\u6307\u5b9a\u3002\u9019\u5c07\u6c7a\u5b9a\u8f49\u63db\u70ba\u5b57\u4e32\u6642\u7684\u683c\u5f0f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u5f8c <strong>SimpleDateFormat.format()<\/strong> \u5b83\u6b63\u5728\u88ab\u8f49\u63db\u70ba\u5b57\u4e32\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n\n\n\n<div class=\"hcb_wrap\" data-no-translation=\"\"><pre class=\"prism line-numbers lang-java\" data-lang=\"Java\"><code>public static void main(String[] args) {\n    Date date = new Date();\n    SimpleDateFormat sdf = new SimpleDateFormat(&quot;yyyy\/MM\/dd hh:mm:ss&quot;);\n    String str = sdf.format(date);\n    \n    System.out.println(&quot;\u65e5\u4ed8\u578b = &quot; + date);\n    System.out.println(&quot;\u6587\u5b57\u5217 = &quot; + str);\n}<\/code><\/pre><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u8f38\u51fa\u7d50\u679c\uff1a<\/h4>\n\n\n\n<div class=\"hcb_wrap\" data-no-translation=\"\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>\u65e5\u4ed8\u578b = Sat Nov 02 12:11:55 UTC 2019\n\u6587\u5b57\u5217 = 2019\/11\/02 12:11:55<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b57\u4e32\u8f49\u65e5\u671f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u5c07\u5b57\u4e32\u8f49\u63db\u70ba\u65e5\u671f\uff0c<strong>SimpleDateFormat.parse<\/strong> \u6211\u5011\u5c07\u63a1\u7528\u9019\u7a2e\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c31\u50cf\u5c07\u65e5\u671f\u8f49\u63db\u70ba\u5b57\u4e32\u4e00\u6a23\uff0c\u5efa\u7acb\u4e00\u500b SimpleDateFormat \u7269\u4ef6\u3002\u5efa\u7acb\u6642\uff0c\u6307\u5b9a\u65e5\u671f\u683c\u5f0f\uff0c\u8a72\u683c\u5f0f\u61c9\u8207\u8981\u8f49\u63db\u7684\u5b57\u4e32\u7684\u65e5\u671f\u683c\u5f0f\u76f8\u7b26\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u5f8c <strong>SimpleDateFormat.parse()<\/strong> \u9019\u6a23\u5c31\u628a\u5b83\u8f49\u63db\u6210\u65e5\u671f\u4e86\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7bc4\u4f8b\u7a0b\u5f0f\u78bc<\/h4>\n\n\n\n<div class=\"hcb_wrap\" data-no-translation=\"\"><pre class=\"prism line-numbers lang-java\" data-lang=\"Java\"><code>public static void main(String[] args) {\n    try {\n        String strDate = &quot;2019\/11\/01 12:34:56&quot;;\n     \n        SimpleDateFormat sdf = new SimpleDateFormat(&quot;yyyy\/MM\/dd hh:mm:ss&quot;);\n        Date date = sdf.parse(strDate);\n        \n        System.out.println(&quot;\u6587\u5b57\u5217 = &quot; + strDate);\n        System.out.println(&quot;\u65e5\u4ed8\u578b = &quot; + date);\n        \n    } catch (ParseException e) {\n        \/\/\u4f8b\u5916\u51e6\u7406\n    }\n}<\/code><\/pre><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u8f38\u51fa\u7d50\u679c\uff1a<\/h4>\n\n\n\n<div class=\"hcb_wrap\" data-no-translation=\"\"><pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>\u6587\u5b57\u5217 = 2019\/11\/01 12:34:56\n\u65e5\u4ed8\u578b = Fri Nov 01 00:34:56 UTC 2019<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u8acb\u6ce8\u610f\uff0c`parse` \u65b9\u6cd5\u6703\u62cb\u51fa\u4e00\u500b `ParseException` \u7570\u5e38\uff0c\u56e0\u6b64\u60a8\u9700\u8981\u5c07\u5176\u5305\u542b\u5728 `try-catch` \u8a9e\u53e5\u4e2d\uff0c\u6216\u518d\u6b21\u62cb\u51fa\u8a72\u7570\u5e38\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6578\u5b57\u21d4\u65e5\u671f\u8f49\u63db<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u907a\u61be\u7684\u662f\uff0c\u76ee\u524d\u6c92\u6709\u5c08\u9580\u7528\u65bc\u6578\u5b57\u548c\u65e5\u671f\u4e4b\u9593\u76f8\u4e92\u8f49\u63db\u7684\u65b9\u6cd5\u3002\u5169\u8005\u90fd\u5fc5\u9808\u5148\u8f49\u63db\u70ba\u5b57\u4e32\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>\u6570\u5024 \u21d2 \u6587\u5b57\u5217\u306e\u5909\u63db \u6570\u5024\u304b\u3089\u6587\u5b57\u5217\u3078\u306e\u5909\u63db\u306f\u3001String.valueof() \u3092\u4f7f\u3044\u307e\u3059\u3002 String [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[19],"tags":[],"class_list":["post-4718","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/4718","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/comments?post=4718"}],"version-history":[{"count":7,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/4718\/revisions"}],"predecessor-version":[{"id":8895,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/posts\/4718\/revisions\/8895"}],"wp:attachment":[{"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/media?parent=4718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/categories?post=4718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chat-messenger.com\/zh_tw\/wp-json\/wp\/v2\/tags?post=4718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}