{"id":31521,"date":"2023-04-23T04:17:19","date_gmt":"2022-12-05T03:11:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e6%b5%81%e5%a4%84%e7%90%86\/"},"modified":"2024-04-30T00:50:29","modified_gmt":"2024-04-29T16:50:29","slug":"%e3%80%90java%e3%80%91%e6%b5%81%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e6%b5%81%e5%a4%84%e7%90%86\/","title":{"rendered":"\u3010Java\u3011\u6d41\u5904\u7406"},"content":{"rendered":"<h1>&#8220;\u4ec0\u4e48\u662f\u6d41\u5a92\u4f53&#8221;<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30c7\u30fc\u30bf\u306e\u6d41\u308c<\/ul>\n<\/li>\n<\/ul>\n<p>\u5165\u51fa\u529b\u5148\u306b\u304b\u304b\u308f\u3089\u305a\u30c7\u30fc\u30bf\u306e\u9023\u306a\u308a\u3068\u3057\u3066\u540c\u3058\u3088\u3046\u306b\u64cd\u4f5c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/p>\n<p>\u5165\u529b\uff08\u53d7\u3051\u53d6\u308a\uff09\/ \u51fa\u529b\uff08\u66f8\u304d\u51fa\u3057\uff09\u30b9\u30c8\u30ea\u30fc\u30e0<br \/>\n\u6587\u5b57\u30b9\u30c8\u30ea\u30fc\u30e0 \/ \u30d0\u30a4\u30ca\u30ea\u30b9\u30c8\u30ea\u30fc\u30e0<\/p>\n<div>\n<div class=\"post-table\">\u57fa\u672c\u30af\u30e9\u30b9\u5165\u529b\u30b9\u30c8\u30ea\u30fc\u30e0\u51fa\u529b\u30b9\u30c8\u30ea\u30fc\u30e0\u6587\u5b57\u30b9\u30c8\u30ea\u30fc\u30e0ReaderWriter\u30d0\u30a4\u30ca\u30ea\u30b9\u30c8\u30ea\u30fc\u30e0InputStreamOutputStream<\/div>\n<\/div>\n<ul class=\"post-ul\">\u57fa\u672c\u30af\u30e9\u30b9\u3092\u3082\u3068\u306b\u64cd\u4f5c\u5bfe\u8c61\u306b\u5fdc\u3058\u64cd\u4f5c\u30af\u30e9\u30b9\u3092\u63d0\u4f9b\u3057\u3066\u3044\u308b<\/ul>\n<h1>\u6587\u4ef6\u5199\u5165<\/h1>\n<p>\u30d5\u30a1\u30a4\u30eb\u30aa\u30fc\u30d7\u30f3<\/p>\n<p>BufferedWriter\u30af\u30e9\u30b9\u306enewBufferedWriter\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\uff08Buffer\u306f\u6587\u5b57\u5217\u30c7\u30fc\u30bf\u3092\u4e00\u6642\u7684\u306b\u4fdd\u5b58\u3059\u308b\u30e1\u30e2\u30ea\u9818\u57df\uff09<br \/>\n\u5f15\u6570\u306bStandardOpenOption.APPEND\u6307\u5b9a\u3067\u8ffd\u8a18\u30e2\u30fc\u30c9<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u51fa\u529b<\/p>\n<p>write\u30e1\u30bd\u30c3\u30c9<br \/>\n\u30c7\u30fc\u30bf\u3092Buffer\u306b\u4fdd\u5b58\u3057\u3066\u6e9c\u307e\u3063\u305f\u3089\u307e\u3068\u3081\u3066\u30d5\u30a1\u30a4\u30eb\u51fa\u529b<\/p>\n<p>newLine\u30e1\u30bd\u30c3\u30c9\u3067\u6539\u884c\u533a\u5207\u308a(Unix\u306f\\n,Windows\u306f\\r\\n)<br \/>\nFiles.write\u30e1\u30bd\u30c3\u30c9\u3067\u6587\u5b57\u5217\u30ea\u30b9\u30c8\u3092\u307e\u3068\u3081\u3066\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307f\u3067\u304d\u308b<\/p>\n<p>Files.write(Paths.get(&#8220;.\/data.log&#8221;),list,StandardCharsets.UTF_8);<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u30af\u30ed\u30fc\u30ba<\/p>\n<p>try-with-resources\u69cb\u6587\u3092\u4f7f\u3046<br \/>\ntry\u3067\u751f\u6210\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u30d6\u30ed\u30c3\u30af\u3092\u629c\u3051\u305f\u3089\u81ea\u52d5\u3067\u7834\u68c4\u3055\u308c\u308b\uff01(\u9014\u4e2d\u306e\u30a8\u30e9\u30fc\u3067close\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3073\u51fa\u3055\u308c\u306a\u3044\u5834\u5408\u3067\u3082\u5927\u4e08\u592b)<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/\u5b9f\u884c\u6642\u9593\u3092.\/data.log\u306b\u8a18\u9332<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.IOException<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.nio.file.Files<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.nio.file.Paths<\/span><span class=\"o\">;<\/span>\r\n<span class=\"c1\">\/\/import java.nio.file.StandardOpenOption;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.time.LocalDateTime<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">try<\/span> <span class=\"o\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">writer<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Files<\/span><span class=\"o\">.<\/span><span class=\"na\">newBufferedWriter<\/span><span class=\"o\">(<\/span><span class=\"nc\">Paths<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"s\">\".\/data.log\"<\/span><span class=\"o\">)))<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/\u30d5\u30a1\u30a4\u30eb\u8ffd\u8a18<\/span>\r\n    <span class=\"c1\">\/\/try (var writer = Files.newBufferedWriter(Paths.get(\".\/data.log\"), StandardOpenOption.APPEND)) {<\/span>\r\n    <span class=\"n\">writer<\/span><span class=\"o\">.<\/span><span class=\"na\">write<\/span><span class=\"o\">(<\/span><span class=\"nc\">LocalDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">().<\/span><span class=\"na\">toString<\/span><span class=\"o\">());<\/span>\r\n    <span class=\"c1\">\/\/ \u6539\u884c\u6587\u5b57\u3092\u7d71\u4e00\u3059\u308b\u5834\u5408<\/span>\r\n    <span class=\"c1\">\/\/write(LocalDateTime.now().toString()+\"\\r\\n\");<\/span>\r\n      <span class=\"n\">writer<\/span><span class=\"o\">.<\/span><span class=\"na\">newLine<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">IOException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u6587\u4ef6\u8f93\u5165<\/h1>\n<p>BufferedReader\u30af\u30e9\u30b9\u306enewBufferedReader\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046<\/p>\n<p>readLine\u30e1\u30bd\u30c3\u30c9\u3067\u30d5\u30a1\u30a4\u30eb\u30dd\u30a4\u30f3\u30bf\u30671\u884c\u305a\u3064\u8aad\u307f\u3068\u308a\u73fe\u5728\u884c\u306e\u6587\u5b57\u5217\u3092\u8fd4\u3059<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u30dd\u30a4\u30f3\u30bf\u30fc\uff1a\u73fe\u5728\u4f4d\u7f6e\u306e\u76ee\u5370\u3002\u30d5\u30a1\u30a4\u30eb\u30aa\u30fc\u30d7\u30f3\u6642\u306b\u30d5\u30a1\u30a4\u30eb\u5148\u982d\u306b\u3042\u308b\u3002\u6b21\u306e\u884c\u304c\u306a\u3044\u5834\u5408\u306bnull\u3092\u8fd4\u3059<\/p>\n<p>Files.readAllLines\u30e1\u30bd\u30c3\u30c9\u3067\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u5185\u5bb9\u3092\u884c\u5358\u4f4d\u3067\u307e\u3068\u3081\u3066\u30ea\u30b9\u30c8\u53d6\u5f97\u3067\u304d\u308b\u3002\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3044\u5834\u5408\u30e1\u30e2\u30ea\u306e\u6d88\u8cbb\u304c\u6fc0\u3057\u3044<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">import<\/span> <span class=\"nn\">java.io.IOException<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.nio.file.Files<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.nio.file.Paths<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">try<\/span> <span class=\"o\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">reader<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Files<\/span><span class=\"o\">.<\/span><span class=\"na\">newBufferedReader<\/span><span class=\"o\">(<\/span><span class=\"nc\">Paths<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"s\">\".\/sample.txt\"<\/span><span class=\"o\">)))<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"kt\">var<\/span> <span class=\"n\">line<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\"<\/span><span class=\"o\">;<\/span>\r\n      <span class=\"k\">while<\/span> <span class=\"o\">((<\/span><span class=\"n\">line<\/span> <span class=\"o\">=<\/span> <span class=\"n\">reader<\/span><span class=\"o\">.<\/span><span class=\"na\">readLine<\/span><span class=\"o\">())<\/span> <span class=\"o\">!=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"c1\">\/\/\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u8eab\u3092<\/span>\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span><span class=\"o\">);<\/span>\r\n      <span class=\"o\">}<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">IOException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u8bfb\u5199\u4e8c\u8fdb\u5236\u6587\u4ef6<\/h1>\n<p>BufferedInputStream \/ BufferedOutputStream<\/p>\n<p>\u30d0\u30c3\u30d5\u30a1\u30fc\u6a5f\u80fd\u3092\u5099\u3048\u305f\u30d0\u30a4\u30c8\u30b9\u30c8\u30ea\u30fc\u30e0<br \/>\n\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u5165\u51fa\u529b\u306fFileInputStream \/ FileOutputStream<\/p>\n<p>\u30b9\u30c8\u30ea\u30fc\u30e0\u3078\u306e\u8aad\u307f\u66f8\u304d\u306f read \/ write\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>read\u306e\u623b\u308a\u5024\u306f\u30d0\u30a4\u30c8\u30c7\u30fc\u30bf(0~255)<br \/>\n\u30b9\u30c8\u30ea\u30fc\u30e0\u7d42\u7aef\u306f-1\u3092\u8fd4\u3059<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/input.png\u3092BufferedInputStream\u3067\u8aad\u307f\u8fbc\u307f<\/span>\r\n<span class=\"c1\">\/\/\u7d50\u679c\u3092BufferedOutputStream\u3067output.png\u306b\u51fa\u529b<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.BufferedInputStream<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.BufferedOutputStream<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.FileInputStream<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.FileOutputStream<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.IOException<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">try<\/span> <span class=\"o\">(<\/span>\r\n        <span class=\"kt\">var<\/span> <span class=\"n\">in<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BufferedInputStream<\/span><span class=\"o\">(<\/span>\r\n          <span class=\"k\">new<\/span> <span class=\"nf\">FileInputStream<\/span><span class=\"o\">(<\/span><span class=\"s\">\".\/input.png\"<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"kt\">var<\/span> <span class=\"n\">out<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BufferedOutputStream<\/span><span class=\"o\">(<\/span>\r\n          <span class=\"k\">new<\/span> <span class=\"nf\">FileOutputStream<\/span><span class=\"o\">(<\/span><span class=\"s\">\".\/output.png\"<\/span><span class=\"o\">)))<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"kt\">var<\/span> <span class=\"n\">data<\/span> <span class=\"o\">=<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">;<\/span>\r\n      <span class=\"k\">while<\/span> <span class=\"o\">((<\/span><span class=\"n\">data<\/span> <span class=\"o\">=<\/span> <span class=\"n\">in<\/span><span class=\"o\">.<\/span><span class=\"na\">read<\/span><span class=\"o\">())<\/span> <span class=\"o\">!=<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"n\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">write<\/span><span class=\"o\">((<\/span><span class=\"kt\">byte<\/span><span class=\"o\">)<\/span> <span class=\"n\">data<\/span><span class=\"o\">);<\/span>\r\n      <span class=\"o\">}<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">IOException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u5bf9\u8c61\u7684\u5e8f\u5217\u5316<\/h1>\n<p>\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\uff1a\u306e\u3088\u3046\u306a\u69cb\u9020\u5316\u30c7\u30fc\u30bf\u3092\u30d0\u30a4\u30c8\u914d\u5217\u306b\u5909\u63db<br \/>\n\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30d0\u30a4\u30c8\u914d\u5217\u306b\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3059\u308b\u3053\u3068\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092DB\u306b\u4fdd\u5b58\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7d4c\u7531\u306e\u53d7\u3051\u6e21\u3057\u53ef\u80fd<\/p>\n<p>\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u53ef\u80fd\u30af\u30e9\u30b9\u306e\u6761\u4ef6<\/p>\n<p>Serializable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u5b9f\u88c5public class Article implements Serializable {<\/p>\n<p>\u5ba3\u8a00\u306e\u307f\u3067\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u305f\u306a\u3044=\u30de\u30fc\u30ab\u30fc\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/p>\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u57fa\u672c\u578b\u3001\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u53ef\u80fd\u306a\u578b<br \/>\n\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u30d0\u30fc\u30b7\u30e7\u30f3\u5ba3\u8a00<\/p>\n<p>serialVersionUID\u3067\u30af\u30e9\u30b9\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u6307\u5b9a<br \/>\n\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\/\u30c7\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u9593\u3067\u7570\u306a\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3068InvalidClassException<\/p>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u304c\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3067\u304d\u306a\u3044\u3068\u304d\u3001\u5f15\u6570\u306e\u306a\u3044\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u6301\u3064<\/p>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u304cSerializable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u5b9f\u88c5\u305b\u305a\u3001\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u307f\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u53ef\u80fd\u306e\u6642\u3001\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30c7\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u306b\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3076<\/p>\n<p>ObjectOutputStream\u30af\u30e9\u30b9\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3092\u884c\u3046<\/p>\n<p>\u5f15\u6570\u306bFileOutputStream(file)\u3067\u30d5\u30a1\u30a4\u30eb\u51fa\u529b<br \/>\nwriteObject\u30e1\u30bd\u30c3\u30c9\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6e21\u3059\uff08article.ser\u4f5c\u6210\uff09<\/p>\n<p>ObjectInputStream\u30af\u30e9\u30b9\u3067\u30c7\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba<\/p>\n<p>\u5f15\u6570\u306b\u8aad\u307f\u8fbc\u3080file\u3092\u6e21\u3057readObject\u30e1\u30bd\u30c3\u30c9\u3067\u8aad\u307f\u8fbc\u3080<br \/>\n\u623b\u308a\u5024\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/article.ser\u306bArticle\u30af\u30e9\u30b9(\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u53ef\u80fd\u30af\u30e9\u30b9)\u3092\u4fdd\u5b58<\/span>\r\n<span class=\"c1\">\/\/\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30d0\u30a4\u30c8\u914d\u5217\u3092\u8aad\u307f\u30c7\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3057\u305f\u516c\u958b\u9375\u6697\u53f7\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5185\u5bb9\u3092\u51fa\u529b<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.FileInputStream<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.FileOutputStream<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.IOException<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.ObjectInputStream<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.io.ObjectOutputStream<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">final<\/span> <span class=\"kt\">var<\/span> <span class=\"n\">file<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\".\/article.ser\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">try<\/span> <span class=\"o\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">out<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ObjectOutputStream<\/span><span class=\"o\">(<\/span><span class=\"k\">new<\/span> <span class=\"nc\">FileOutputStream<\/span><span class=\"o\">(<\/span><span class=\"n\">file<\/span><span class=\"o\">)))<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">writeObject<\/span><span class=\"o\">(<\/span><span class=\"k\">new<\/span> <span class=\"nc\">Article<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Java11\u306e\u5909\u66f4\u70b9\u3068\u65b0\u3057\u3044API\"<\/span><span class=\"o\">,<\/span>\r\n        <span class=\"s\">\"https:\/\/codezine.jp\/article\/corner\/751\"<\/span><span class=\"o\">,<\/span> <span class=\"kc\">false<\/span><span class=\"o\">));<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">IOException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"k\">try<\/span> <span class=\"o\">(<\/span><span class=\"kt\">var<\/span> <span class=\"n\">in<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ObjectInputStream<\/span><span class=\"o\">(<\/span><span class=\"k\">new<\/span> <span class=\"nc\">FileInputStream<\/span><span class=\"o\">(<\/span><span class=\"n\">file<\/span><span class=\"o\">)))<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"kt\">var<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Article<\/span><span class=\"o\">)<\/span><span class=\"n\">in<\/span><span class=\"o\">.<\/span><span class=\"na\">readObject<\/span><span class=\"o\">();<\/span>\r\n      <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">a<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">ClassNotFoundException<\/span> <span class=\"o\">|<\/span> <span class=\"nc\">IOException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">e<\/span><span class=\"o\">.<\/span><span class=\"na\">printStackTrace<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;\u4ec0\u4e48\u662f\u6d41\u5a92\u4f53&#8221; \u30c7\u30fc\u30bf\u306e\u6d41\u308c \u5165\u51fa\u529b\u5148\u306b\u304b\u304b\u308f\u3089\u305a\u30c7\u30fc\u30bf\u306e\u9023\u306a\u308a\u3068\u3057\u3066\u540c\u3058\u3088\u3046\u306b\u64cd\u4f5c [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31521","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010Java\u3011\u6d41\u5904\u7406 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u3011\u6d41\u5904\u7406\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Java\u3011\u6d41\u5904\u7406\" \/>\n<meta property=\"og:description\" content=\"&#8220;\u4ec0\u4e48\u662f\u6d41\u5a92\u4f53&#8221; \u30c7\u30fc\u30bf\u306e\u6d41\u308c \u5165\u51fa\u529b\u5148\u306b\u304b\u304b\u308f\u3089\u305a\u30c7\u30fc\u30bf\u306e\u9023\u306a\u308a\u3068\u3057\u3066\u540c\u3058\u3088\u3046\u306b\u64cd\u4f5c [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u3011\u6d41\u5904\u7406\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-05T03:11:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T16:50:29+00:00\" 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