{"id":662,"date":"2021-02-08T15:56:08","date_gmt":"2021-02-08T07:56:08","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/java\/?p=662"},"modified":"2021-02-08T16:15:50","modified_gmt":"2021-02-08T08:15:50","slug":"%e6%8d%95%e8%8e%b7%e5%a4%84%e7%90%86-i-o-%e6%b5%81%e5%bc%82%e5%b8%b8","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/java\/post-662.html","title":{"rendered":"\u6355\u83b7\u5904\u7406 I\/O \u6d41\u5f02\u5e38"},"content":{"rendered":"\n<p>I\/O \u64cd\u4f5c\u5f88\u5bb9\u6613\u4ea7\u751f I\/O \u5f02\u5e38\uff0c\u82e5\u4e0d\u91ca\u653e\u8d44\u6e90\u4f1a\u4ea7\u751f\u5185\u5b58\u6cc4\u6f0f<\/p>\n\n\n\n<p>\u5bf9\u4e8e I\/O \u5f02\u5e38\uff0c\u6709\u51e0\u79cd\u7b80\u5355\u7684\u65b9\u5f0f<\/p>\n\n\n\n<h5>1.\u4f7f\u7528\u6700\u666e\u901a\u7684 try-catch-finally<\/h5>\n\n\n\n<pre class=\"wp-block-code\"><code>FileWriter fw = null; \/\/\u63d0\u9ad8\u53d8\u91cf\u7684\u4f5c\u7528\u57df\ntry{\n    \/\/\u53ef\u80fd\u4f1a\u4ea7\u751f\u5f02\u5e38\u7684\u4ee3\u7801\n    fw = new FileWriter(\"D:\\\\a.txt\",true);\n    for(int i=0;i&lt;10;i++){\n        fw.write(\"java\u6559\u7a0b\"+i+\"\\r\\n\");\n    }\n}catch(IOException e){\n    \/\/\u5904\u7406\u5f02\u5e38\n    System.out.println(e);\n}finally{\n    \/\/\u5fc5\u987b\u8fdb\u884c\u7684\u4ee3\u7801\uff0c\u8fd9\u91cc\u6307\u5173\u95ed\u8d44\u6e90\n    if(fw!=null){\n        try{\n            fw.close();\n        }catch(IOException e){\n            System.out.println(e);\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<h5>2.jdk7\u7684\u65b0\u7279\u6027<\/h5>\n\n\n\n<p>\u628a\u53ef\u80fd\u51fa\u5f02\u5e38\u7684\u53d8\u91cf\uff0c\u5b9a\u4e49\u5728 try() \u7684\u5c0f\u62ec\u53f7\u4e2d\uff0c\u4f5c\u7528\u57df\u53ea\u5728 try \u4e2d, \u4e0d\u9700\u8981finally<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>try(FileWriter fw = new FileWriter(\"D:\\\\a.txt\",true);){\r\n    \/\/\u53ef\u80fd\u4f1a\u4ea7\u751f\u5f02\u5e38\u7684\u4ee3\u7801\r\n    for(int i=0;i&lt;10;i++){\r\n        fw.write(\"java\u6559\u7a0b\"+i+\"\\r\\n\");\r\n    }\r\n}catch(IOException e){\r\n    \/\/\u5904\u7406\u5f02\u5e38\r\n    System.out.println(e);\r\n}<\/code><\/pre>\n\n\n\n<h5>3.jdk9\u7684\u65b0\u7279\u6027<\/h5>\n\n\n\n<p>\u5728 try() \u7684\u5c0f\u62ec\u53f7\u4e2d\uff0c\u5f15\u5165\u5916\u90e8\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u5b83\u7684\u4f5c\u7528\u57df\u4e5f\u4f1a\u9650\u5b9a\u5728 try \u4e2d<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>FileWriter fw = new FileWriter(\"D:\\\\a.txt\",true); \/\/\u5b9a\u4e49\u629b\u51fa\u5f02\u5e38\ntry(fw){\r \/\/\u591a\u4e2a\u53d8\u91cf\u7528  \u5206\u53f7;  \u9694\u5f00\n    \/\/\u53ef\u80fd\u4f1a\u4ea7\u751f\u5f02\u5e38\u7684\u4ee3\u7801\r\n    for(int i=0;i&lt;10;i++){\r\n        fw.write(\"java\u6559\u7a0b\"+i+\"\\r\\n\");\r\n    }\r\n}catch(IOException e){\r\n    \/\/\u5904\u7406\u5f02\u5e38\r\n    System.out.println(e);\r\n}\n\/\/\u4e00\u65e6\u8d85\u51fa\u4e86 try \u5b9a\u4e49\u57df\uff0c\u6d41\u4f1a\u81ea\u52a8\u5173\u95ed\uff0c\n\/\/\u867d\u7136 fw \u4f5c\u7528\u57df\u5728\u5916\u90e8\uff0c\u4f46\u4f7f\u7528\u4f1a\u62a5\u9519<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>I\/O \u64cd\u4f5c\u5f88\u5bb9\u6613\u4ea7\u751f I\/O \u5f02\u5e38\uff0c\u82e5\u4e0d\u91ca\u653e\u8d44\u6e90\u4f1a\u4ea7\u751f\u5185\u5b58\u6cc4\u6f0f \u5bf9\u4e8e I\/O \u5f02\u5e38\uff0c\u6709\u51e0\u79cd\u7b80\u5355\u7684\u65b9\u5f0f 1.\u4f7f&hellip; <a href=\"https:\/\/www.52dixiaowo.com\/java\/post-662.html\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">\u6355\u83b7\u5904\u7406 I\/O \u6d41\u5f02\u5e38<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[22],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/posts\/662"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/comments?post=662"}],"version-history":[{"count":0,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/posts\/662\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/media?parent=662"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/categories?post=662"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/java\/wp-json\/wp\/v2\/tags?post=662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}