{"id":31488,"date":"2023-10-12T20:47:31","date_gmt":"2023-07-30T07:53:41","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86\/"},"modified":"2024-05-04T03:56:02","modified_gmt":"2024-05-03T19:56:02","slug":"%e3%80%90java%e3%80%91%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86\/","title":{"rendered":"\u3010Java\u3011\u5f02\u5e38\u5904\u7406"},"content":{"rendered":"<h1>\u4f8b\u5916\u5904\u7406\u662f\u6307\u5bf9\u4e8e\u5f02\u5e38\u60c5\u51b5\u7684\u7279\u6b8a\u5904\u7406\u65b9\u6cd5\u3002<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a2\u30d7\u30ea\u5b9f\u884c\u6642\u306b\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u306b\u5bfe\u5fdc\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>\u72ed\u7fa9\u306e\u4f8b\u5916\uff1a\u958b\u767a\u8005\u306e\u8cac\u4efb\u3067\u306f\u53ef\u5426\u3067\u304d\u306a\u3044\u30a8\u30e9\u30fc<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u306a\u3044<br \/>\n\u63a5\u7d9a\u5148DB\u304c\u505c\u6b62\u3057\u3066\u3044\u305f<\/p>\n<p>Java\u3067\u306f\u3053\u308c\u3089\u306e\u30a8\u30e9\u30fc\u306b\u5bfe\u5fdc\u5fc5\u9808<\/p>\n<p>\u4f8b\u5916\u306f\u578b\uff08\u30af\u30e9\u30b9\uff09\u3067\u3042\u308b<\/p>\n<p>\u4e00\u822c\u7684\u306a\u4f8b\u5916\u3092\u4e0a\u4f4d\u30af\u30e9\u30b9\u3001\u500b\u3005\u306e\u72b6\u6cc1\u306e\u4f8b\u5916\u3092\u4e0b\u4f4d\u30af\u30e9\u30b9\u3068\u3057\u305f\u30af\u30e9\u30b9\u968e\u5c64\u3068\u3057\u3066\u8868\u3059<\/p>\n<h1>\u5617\u8a66&#8230;\u6355\u7372\u8a9e\u6cd5<\/h1>\n<p>try\u30d6\u30ed\u30c3\u30af\uff1a\u672c\u6765\u306e\u51e6\u7406<\/p>\n<p>catch\u30d6\u30ed\u30c3\u30af\uff1a\u4f8b\u5916\u306e\u578b\u306b\u3088\u3063\u3066\u547c\u3070\u308c\u308b<\/p>\n<p>\u4f8b\u5916\u767a\u751f=\u4f8b\u5916\u304c\u30b9\u30ed\u30fc\u3055\u308c\u308b<br \/>\n\u6307\u5b9a\u3055\u308c\u305f\u4f8b\u5916\u5909\u6570\uff08e\u3084ex\uff09\u3092\u4ecb\u3057\u3066\u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u30a2\u30af\u30bb\u30b9<br \/>\n\u30d6\u30ed\u30c3\u30af\u5358\u4f4d\u3067\u30b9\u30b3\u30fc\u30d7\u3092\u6301\u3064\u306e\u3067\u8907\u6570catch\u30d6\u30ed\u30c3\u30af\u304c\u3042\u3063\u3066\u3082\u540c\u3058\u5909\u6570\u540d(e)\u3067OK<\/p>\n<p>\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>getMessage()\uff1a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u53d6\u5f97<\/p>\n<p>getLocalizedMessage()\uff1a\u30ed\u30fc\u30ab\u30e9\u30a4\u30ba\u5bfe\u5fdc\u3057\u305f\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u53d6\u5f97<\/p>\n<p>getCause()\uff1a\u30a8\u30e9\u30fc\u539f\u56e0\u3092\u53d6\u5f97<\/p>\n<p>getStackTrace()\uff1a\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u53d6\u5f97<\/p>\n<p>printStackTrace()\uff1a\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u51fa\u529b<\/p>\n<pre class=\"post-pre\"><code><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.FileNotFoundException<\/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\">TryBasic<\/span> <span class=\"o\">{<\/span>\r\n\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\">FileInputStream<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C:\/data\/nothing.gif\"<\/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=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">printf<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%02X \"<\/span><span class=\"o\">,<\/span> <span class=\"n\">data<\/span><span class=\"o\">);<\/span>\r\n      <span class=\"o\">}<\/span>\r\n    <span class=\"c1\">\/\/FileInputStream\u30af\u30e9\u30b9\u3067FileNotFoundException\u4f8b\u5916\u3092\u30b9\u30ed\u30fc<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">FileNotFoundException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/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=\"s\">\"\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002\"<\/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=\"c1\">\/\/\u6307\u5b9a\u3055\u308c\u305f\u4f8b\u5916\u5909\u6570\uff08e\uff09\u3092\u4ecb\u3057\u3066\u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u30a2\u30af\u30bb\u30b9<\/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<h2>\u5806\u6808\u8ddf\u8e2a<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4f8b\u5916\u767a\u751f\u307e\u3067\u306b\u7d4c\u305f\u30e1\u30bd\u30c3\u30c9\u306e\u5c65\u6b74<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a8\u30f3\u30c8\u30ea\u30dd\u30a4\u30f3\u30c8\u3067\u3042\u308bmain\u30e1\u30bd\u30c3\u30c9\u3092\u57fa\u70b9\u306b\u547c\u3073\u51fa\u3057\u9806\u306b\u8a18\u9332<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u610f\u56f3\u3057\u306a\u3044\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3070\u308c\u3066\u306a\u3044\u304b\u3001\u904e\u7a0b\u304c\u9593\u9055\u3063\u3066\u306a\u3044\u304b\u78ba\u8a8d<\/ul>\n<h2>\u6700\u540e\u7684\u4ee3\u7801\u5757<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4f8b\u5916\u306e\u6709\u7121\u306b\u3088\u3089\u305a\u6700\u7d42\u7684\u306b\u5b9f\u884c\u3055\u308c\u308b\u30d6\u30ed\u30c3\u30af<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">try\u30d6\u30ed\u30c3\u30af\u3067\u5229\u7528\u3057\u305f\u30ea\u30bd\u30fc\u30b9\u306e\u51e6\u7406\u306a\u3069<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">finally\u30d6\u30ed\u30c3\u30af\u306f\u4e00\u500b\u3060\u3051<\/ul>\n<pre class=\"post-pre\"><code><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.FileNotFoundException<\/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\">TryFinally<\/span> <span class=\"o\">{<\/span>\r\n\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=\"nc\">FileInputStream<\/span> <span class=\"n\">in<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">in<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">FileInputStream<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C:\/data\/nothing.gif\"<\/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=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">printf<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%02X \"<\/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\">FileNotFoundException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/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=\"s\">\"\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002\"<\/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> <span class=\"k\">finally<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"c1\">\/\/\u4f8b\u5916\u306e\u6709\u7121\u306b\u3088\u3089\u305a\u30d5\u30a1\u30a4\u30eb\u30af\u30ed\u30fc\u30ba<\/span>\r\n      <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">in<\/span> <span class=\"o\">!=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n          <span class=\"n\">in<\/span><span class=\"o\">.<\/span><span class=\"na\">close<\/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<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u5c1d\u8bd5\u4f7f\u7528\u8d44\u6e90\u6784\u5efa\u8bed\u53e5<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">try&#8230;finally\u69cb\u6587\u3088\u308a\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u306e\u3067\u63a8\u5968<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">try\u30d6\u30ed\u30c3\u30af\u3092\u51fa\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u30ea\u30bd\u30fc\u30b9\u81ea\u52d5\u89e3\u653e\u3059\u308b\u306e\u3067finally\u4e0d\u8981\uff01<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u6ce8\u610f\uff1a<\/ul>\n<\/li>\n<\/ul>\n<p>AutoCloseable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068<\/p>\n<p>Reader\/Writer\/InputStream\/OutputStream\/Connection\/Statement\/ResultSet<\/p>\n<p>\u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e\u9806\u5e8f\u304c\u5909\u308f\u308b<\/p>\n<p>\u5f93\u6765\u306etry&#8230;finally\u69cb\u6587\u3067\u306fcatch\u30d6\u30ed\u30c3\u30af\u6642\u70b9\u3067\u30ea\u30bd\u30fc\u30b9\u751f\u304d\u3066\u305f<br \/>\ntry-with-resource\u3067\u306ftry\u30d6\u30ed\u30c3\u30af\u3092\u51fa\u308b\u3068\u30ea\u30bd\u30fc\u30b9\u89e3\u653e<\/p>\n<p>\u30ea\u30bd\u30fc\u30b9\u30b9\u30b3\u30fc\u30d7\u304c\u7570\u306a\u308b<\/p>\n<p>try&#8230;finally\u69cb\u6587\u3067\u306f\u30d6\u30ed\u30c3\u30af\u3092\u307e\u305f\u3044\u3067\u30ea\u30bd\u30fc\u30b9\u51e6\u7406\u3059\u308b\u306e\u3067\u30ea\u30bd\u30fc\u30b9\u5909\u6570\u306ftry\u30d6\u30ed\u30c3\u30af\u306e\u5916\u3067\u5ba3\u8a00<br \/>\ntry-with-resource\u3067\u306f\u30b9\u30b3\u30fc\u30d7\u304ctry\u30d6\u30ed\u30c3\u30af\u914d\u4e0b\u306b\u9650\u5b9a\uff08Java9\u4ee5\u964d\u3067\u306ftry\u30d6\u30ed\u30c3\u30af\u5916\u3067\u5ba3\u8a00\u3055\u308c\u305f\u30ea\u30bd\u30fc\u30b9\u5f15\u7528\u53ef\u80fd\uff09<br \/>\nvar input = new FileInputStream(&#8230;)<br \/>\ntry(input){&#8230;}<\/p>\n<pre class=\"post-pre\"><code><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.FileNotFoundException<\/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\">TryWithResources<\/span> <span class=\"o\">{<\/span>\r\n\r\n<span class=\"c1\">\/\/\u30d6\u30ed\u30c3\u30af\u5148\u982d\u3067\u30ea\u30bd\u30fc\u30b9\u5ba3\u8a00<\/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\">in<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">FileInputStream<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C:\/data\/hogee.gif\"<\/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=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">printf<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%02X \"<\/span><span class=\"o\">,<\/span> <span class=\"n\">data<\/span><span class=\"o\">);<\/span>\r\n      <span class=\"o\">}<\/span>\r\n    <span class=\"c1\">\/\/try\u30d6\u30ed\u30c3\u30af\u3092\u51fa\u308b\u3068\u30ea\u30bd\u30fc\u30b9\u81ea\u52d5\u89e3\u653e<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">FileNotFoundException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/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=\"s\">\"\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3002\"<\/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>\u4f8b\u5916\u30af\u30e9\u30b9\u7684\u5c42\u6b21\u7ed3\u6784<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30af\u30e9\u30b9\u968e\u5c64\u3068\u3044\u3046\u89b3\u70b9\u3067\u306f\u3001\u5168\u90e8\u306e\u4f8b\u5916\/\u30a8\u30e9\u30fc\u30af\u30e9\u30b9\u306fThrowable\u30af\u30e9\u30b9\u3092\u9802\u70b9\u3068\u3057\u305f\u968e\u5c64\u30c4\u30ea\u30fc\u306b\u5c5e\u3059\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>Error\u30af\u30e9\u30b9\uff1a\u81f4\u547d\u7684\u30a8\u30e9\u30fc \u3000\u3000\u3000 \u3000\u3000\u3000&#8212;- \u3010\u4f8b\u5916\u51e6\u7406\u3057\u306a\u3044\u3011<\/p>\n<p>\u914d\u4e0b\u306e\u30a8\u30e9\u30fc\u306f\u30a8\u30e9\u30fc\u4f8b\u5916<\/p>\n<p>IOErrer\uff1a\u91cd\u5927\u306a\u5165\u51fa\u529b\u30a8\u30e9\u30fc\u3001VirtualMachineError\uff1a\u4eee\u60f3\u30de\u30b7\u30f3\u30ec\u30d9\u30eb\u3067\u306e\u969c\u5bb3<\/p>\n<p>Exception\u30af\u30e9\u30b9 \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000 &#8212;- \u3010\u4f8b\u5916\u51e6\u7406\u3059\u308b\u3011<\/p>\n<p>RuntimeException\u30af\u30e9\u30b9\u3000\u3000\u3000\u3000\u3000\u3000&#8212;- \u3010\u4f8b\u5916\u51e6\u7406\u4efb\u610f\u3011<\/p>\n<p>\u914d\u4e0b\u306e\u30a8\u30e9\u30fc\u306f\u975e\u691c\u67fb\u4f8b\u5916\uff08=\u5b9f\u884c\u6642\u4f8b\u5916\uff09<br \/>\nIllegalArgumentException\uff1a\u4e0d\u6b63\u306a\u5f15\u6570\u3001NullPointerException\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304cnull<\/p>\n<p>\u305d\u306e\u4ed6\u914d\u4e0b\u306e\u30a8\u30e9\u30fc\u306f\u691c\u67fb\u4f8b\u5916<\/p>\n<p>FileNotFoundException\uff1a\u30d5\u30a1\u30a4\u30eb\u5b58\u5728\u306a\u3057\u3001SQLException\uff1aDB\u30a2\u30af\u30bb\u30b9\u6642\u306e\u554f\u984c<\/p>\n<h1>\u6ce8\u610f\u4e8b\u9879\uff1a\u5bf9\u4e8e\u5f02\u5e38\u5904\u7406<\/h1>\n<p>Exception\u3067\u6355\u6349\u3057\u306a\u3044<\/p>\n<p>catch(Exception e)\u306f\u5168\u90e8\u306e\u4f8b\u5916\u3092\u6355\u6349<\/p>\n<p>IOException\u3088\u308a\u5177\u4f53\u7684\u306aFileNotFoundException<\/p>\n<p>\u30de\u30eb\u30c1\u30ad\u30e3\u30c3\u30c1\u6d3b\u7528\u3059\u308b<\/p>\n<p>\u8907\u6570\u306e\u4f8b\u5916\u306b\u5bfe\u3057\u3066\u540c\u3058\u51e6\u7406\u3092\u3059\u308b<\/p>\n<p>\u4f8b\u59161|\u4f8b\u59162\uff08\u3044\u305a\u308c\u304b\u306e\u5834\u5408\uff09<\/p>\n<p>catch\u30d6\u30ed\u30c3\u30af\u9806<\/p>\n<p>\u8907\u6570\u3042\u308b\u5834\u5408\u3001\u5148\u982d\u306e\u8a18\u8ff0\u304c\u512a\u5148<br \/>\n\u4e0b\u4f4d\u306e\u4f8b\u5916\u3092\u5148\u306b\u3001\u4e0a\u4f4d\u306e\u4f8b\u5916\u3092\u5f8c\u306b\u8a18\u8ff0<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/\u30de\u30eb\u30c1\u30ad\u30e3\u30c3\u30c1<\/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.IOException<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.net.URI<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.net.URISyntaxException<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">TryMulti<\/span> <span class=\"o\">{<\/span>\r\n\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\">FileInputStream<\/span><span class=\"o\">(<\/span><span class=\"s\">\"C:\/data\/nasi.gif\"<\/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=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">printf<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%02X \"<\/span><span class=\"o\">,<\/span> <span class=\"n\">data<\/span><span class=\"o\">);<\/span>\r\n      <span class=\"o\">}<\/span>\r\n      <span class=\"kt\">var<\/span> <span class=\"n\">uri<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"no\">URI<\/span><span class=\"o\">(<\/span> <span class=\"s\">\"https:\/\/www.neko.example.com\"<\/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\">uri<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">());<\/span>\r\n    <span class=\"c1\">\/\/\u30de\u30eb\u30c1\u30ad\u30e3\u30c3\u30c1<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">IOException<\/span> <span class=\"o\">|<\/span> <span class=\"nc\">URISyntaxException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/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=\"s\">\"\u30d5\u30a1\u30a4\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\u3002\"<\/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>\u629b\u51fa\u4e00\u4e2a\u4f8b\u5916<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30b9\u30ed\u30fc\u4ee5\u5916\u306b\u958b\u767a\u8005\u304c\u30b9\u30ed\u30fc\u3067\u304d\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>`throw \u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8&#8217;\u3067\u4efb\u610f\u306e\u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6e21\u305b\u308b<\/p>\n<p>\u30b9\u30ed\u30fc\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u4f8b\u5916\u3092throws\u53e5\u3067\u5ba3\u8a00<\/p>\n<p>throw\uff1a\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3059\u308b<br \/>\nthrows\uff1a\u30e1\u30bd\u30c3\u30c9\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u5ba3\u8a00<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"nf\">FileInputStream<\/span><span class=\"o\">(<\/span><span class=\"nc\">File<\/span> <span class=\"n\">file<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">FileNotFoundException<\/span><span class=\"o\">{<\/span>\r\n<span class=\"c1\">\/\/\u7565<\/span>\r\n<\/code><\/pre>\n<h2>\u7279\u522b\u6295\u63b7\u7684\u6ce8\u610f\u4e8b\u9879<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Exception\u3092\u30b9\u30ed\u30fc\u3057\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u691c\u67fb\u4f8b\u5916\/\u975e\u691c\u67fb\u4f8b\u5916\u3092\u9069\u5207\u306b\u9078\u629e<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u51fa\u6765\u308b\u3060\u3051\u6a19\u6e96\u4f8b\u5916\u3092\u4f7f\u3046<\/ul>\n<\/li>\n<\/ul>\n<p>NullPointerException\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304cnull<\/p>\n<p>IndexOutOfBoundsException\uff1a\u914d\u5217\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u7bc4\u56f2\u5916<\/p>\n<p>UnsupportedOperationException\uff1a\u8981\u6c42\u64cd\u4f5c\u304c\u672a\u30b5\u30dd\u30fc\u30c8<\/p>\n<p>IllegalArgumentException\uff1a\u30e1\u30bd\u30c3\u30c9\u306b\u6e21\u3055\u308c\u305f\u5f15\u6570\u306b\u554f\u984c<\/p>\n<p>IllegalStateException\uff1a\u610f\u56f3\u3057\u305f\u72b6\u614b\u3067\u306a\u3044\u3068\u304d\u306b\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u305f<\/p>\n<p>ArithmeticException\uff1a\u8a08\u7b97\u3067\u4f8b\u5916\u7684\u306a\u6761\u4ef6\u304c\u767a\u751f<\/p>\n<p>NumberFormatException\uff1a\u6570\u5024\u5f62\u5f0f\u6b63\u3057\u304f\u306a\u3044<\/p>\n<p>private\u30e1\u30bd\u30c3\u30c9\u306fassert\u547d\u4ee4\u3092\u4f7f\u3046<\/p>\n<p>\u6761\u4ef6\u5f0f\u304cfalse\u306e\u6642\u306bAssertionError\u4f8b\u5916<br \/>\njava\u30b3\u30de\u30f3\u30c9\u3067-ea\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u660e\u793a\u3057\u305f\u6642\u306e\u307f\u52d5\u4f5c<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">AssertBasic<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">double<\/span> <span class=\"nf\">getTrapezoidArea<\/span><span class=\"o\">(<\/span><span class=\"kt\">double<\/span> <span class=\"n\">upper<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">lower<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">height<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/\u5f15\u65700\u4ee5\u4e0b\u306e\u5834\u5408\u306b\u4f8b\u5916\u767a\u751f<\/span>\r\n    <span class=\"k\">assert<\/span> <span class=\"n\">upper<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">lower<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">height<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"o\">(<\/span><span class=\"n\">upper<\/span> <span class=\"o\">+<\/span> <span class=\"n\">lower<\/span><span class=\"o\">)<\/span> <span class=\"o\">*<\/span> <span class=\"n\">height<\/span> <span class=\"o\">\/<\/span> <span class=\"mi\">2<\/span><span class=\"o\">;<\/span>\r\n  <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=\"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=\"nc\">AssertBasic<\/span><span class=\"o\">.<\/span><span class=\"na\">getTrapezoidArea<\/span><span class=\"o\">(-<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">4<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">));<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u4f8b\u5916\u518d\u6295\u51fa<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u305d\u306e\u5834\u3067\u51e6\u7406\u305b\u305a\u51e6\u7406\u306f\u547c\u3073\u51fa\u3057\u5143\u306b\u59d4\u306d\u308b\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n<p>\u57fa\u672c\u3001\u305d\u306e\u5834\u3067\u500b\u5225\u51e6\u7406\u3067\u306f\u306a\u304f\u3001\u500b\u3005\u306e\u51e6\u7406\u3092\u547c\u3073\u30a2\u30d7\u30ea\u306e\u6d41\u308c\u305d\u306e\u3082\u306e\u3092\u5236\u5fa1\u3059\u308b\u4e0a\u4f4d\u30b3\u30fc\u30c9\u3067\u51e6\u7406\u3059\u3079\u304d<\/p>\n<p>\u4f8b\u5916\u578b\u3092\u8ce2\u304f\u5224\u5b9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\uff08Java7~\uff09<\/p>\n<p>throws\u3067\u5ba3\u8a00\u3059\u308b\u306e\u306fException\u578b\u306e\u307f\u3067OK<br \/>\n\u30de\u30eb\u30c1\u30ad\u30e3\u30c3\u30c1\u4e0d\u8981<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">TryRethrow<\/span> <span class=\"o\">{<\/span>\r\n<span class=\"c1\">\/\/MySampleException, MyLibException\u3067rethrow\u30e1\u30bd\u30c3\u30c9\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">rethrow<\/span><span class=\"o\">(<\/span><span class=\"kt\">boolean<\/span> <span class=\"n\">flag<\/span><span class=\"o\">)<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">MySampleException<\/span><span class=\"o\">,<\/span> <span class=\"nc\">MyLibException<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">flag<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">MySampleException<\/span><span class=\"o\">();<\/span>\r\n      <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">MyLibException<\/span><span class=\"o\">();<\/span>\r\n      <span class=\"o\">}<\/span>\r\n    <span class=\"c1\">\/\/Exception\u578b\u3067\u53d7\u3051\u3066\u305d\u306e\u307e\u307e\u518d\u30b9\u30ed\u30fc<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Exception<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">throw<\/span> <span class=\"n\">e<\/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>\u4f8b\u5916\u7ffb\u8bd1<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u500b\u3005\u306e\u4f8b\u5916\u3092\u4e00\u65e6\u88dc\u8db3\u3057\u3066\u4e0a\u4f4d\u306e\u30a2\u30d7\u30ea\u306e\u4f8b\u5916\u3068\u3057\u3066\u675f\u306d\u518d\u30b9\u30ed\u30fc<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4f8b\u5916\u3092\u30a2\u30d7\u30ea\u72ec\u81ea\u306e\u4f8b\u5916\u306b\u307e\u3068\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u547c\u3073\u51fa\u3057\u5143\u3067\u500b\u3005\u306e\u4f8b\u5916\u3092\u610f\u8b58\u305b\u305a\u3001\u3088\u308a\u9ad8\u3044\u30ec\u30d9\u30eb\u306e\u4f8b\u5916\u3092\u610f\u8b58\u3059\u308c\u3070\u3044\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>\u7ffb\u8a33\u3055\u308c\u305f\u4e0a\u4f4d\u4f8b\u5916\u304b\u3089\u672c\u6765\u306e\u539f\u56e0\u3092\u53d6\u5f97\u3059\u308b\u306b\u306fgetCause\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>var ex = e.getCause();<\/p>\n<pre class=\"post-pre\"><code>\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.net.URI<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.net.http.HttpClient<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.net.http.HttpRequest<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.net.http.HttpResponse<\/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=\"c1\">\/\/\u7ffb\u8a33\u4f8b\u5916\u3067MySampleException\u306e\u307f\u610f\u8b58\u3059\u308c\u3070\u3044\u3044<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">UseTrans<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">readHttpPages<\/span><span class=\"o\">()<\/span> <span class=\"kd\">throws<\/span> <span class=\"nc\">MySampleException<\/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\">\"C:\/data\/link.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=\"kt\">var<\/span> <span class=\"n\">client<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">HttpClient<\/span><span class=\"o\">.<\/span><span class=\"na\">newHttpClient<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"kt\">var<\/span> <span class=\"n\">req<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">HttpRequest<\/span><span class=\"o\">.<\/span><span class=\"na\">newBuilder<\/span><span class=\"o\">().<\/span><span class=\"na\">uri<\/span><span class=\"o\">(<\/span><span class=\"no\">URI<\/span><span class=\"o\">.<\/span><span class=\"na\">create<\/span><span class=\"o\">(<\/span><span class=\"n\">line<\/span><span class=\"o\">)).<\/span><span class=\"na\">build<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"kt\">var<\/span> <span class=\"n\">res<\/span> <span class=\"o\">=<\/span> <span class=\"n\">client<\/span><span class=\"o\">.<\/span><span class=\"na\">send<\/span><span class=\"o\">(<\/span><span class=\"n\">req<\/span><span class=\"o\">,<\/span> <span class=\"nc\">HttpResponse<\/span><span class=\"o\">.<\/span><span class=\"na\">BodyHandlers<\/span><span class=\"o\">.<\/span><span class=\"na\">ofString<\/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\">res<\/span><span class=\"o\">.<\/span><span class=\"na\">body<\/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=\"o\">|<\/span> <span class=\"nc\">InterruptedException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">MySampleException<\/span><span class=\"o\">(<\/span><span class=\"n\">e<\/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>\u81ea\u5b9a\u4e49\u7684\u5f02\u5e38\u7c7b<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4f8b\u5916\u30af\u30e9\u30b9\u306f\u30a2\u30d7\u30ea\u3067\u5b9a\u7fa9\u53ef\u80fd<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Exception\uff08\u6d3e\u751f\u30af\u30e9\u30b9\uff09\u3092\u7d99\u627f\u3059\u308b\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n<p>\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u3053\u3068<\/p>\n<p>Exception\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u518d\u5b9a\u7fa9\u3057super\u547c\u3073\u51fa\u3057\u3067OK<\/p>\n<p>\u72ec\u81ea\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3084\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u88c5\u3092\u6301\u3063\u305f\u4f8b\u5916\u3082\u53ef\u80fd<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/Exception\uff08\u6d3e\u751f\u30af\u30e9\u30b9\uff09\u3092\u7d99\u627f<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">MySampleException<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Exception<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"c1\">\/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">MySampleException<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">super<\/span><span class=\"o\">();<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">MySampleException<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">message<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">super<\/span><span class=\"o\">(<\/span><span class=\"n\">message<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">MySampleException<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">message<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Throwable<\/span> <span class=\"n\">cause<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">super<\/span><span class=\"o\">(<\/span><span class=\"n\">message<\/span><span class=\"o\">,<\/span> <span class=\"n\">cause<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">MySampleException<\/span><span class=\"o\">(<\/span><span class=\"nc\">Throwable<\/span> <span class=\"n\">cause<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">super<\/span><span class=\"o\">(<\/span><span class=\"n\">cause<\/span><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>\u4f8b\u5916\u5904\u7406\u662f\u6307\u5bf9\u4e8e\u5f02\u5e38\u60c5\u51b5\u7684\u7279\u6b8a\u5904\u7406\u65b9\u6cd5\u3002 \u30a2\u30d7\u30ea\u5b9f\u884c\u6642\u306b\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u306b\u5bfe\u5fdc\u3059\u308b \u72ed\u7fa9\u306e\u4f8b\u5916\uff1a\u958b\u767a\u8005\u306e\u8cac\u4efb\u3067\u306f [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31488","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\u5f02\u5e38\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\u5f02\u5e38\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\u5f02\u5e38\u5904\u7406\" \/>\n<meta property=\"og:description\" content=\"\u4f8b\u5916\u5904\u7406\u662f\u6307\u5bf9\u4e8e\u5f02\u5e38\u60c5\u51b5\u7684\u7279\u6b8a\u5904\u7406\u65b9\u6cd5\u3002 \u30a2\u30d7\u30ea\u5b9f\u884c\u6642\u306b\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u306b\u5bfe\u5fdc\u3059\u308b \u72ed\u7fa9\u306e\u4f8b\u5916\uff1a\u958b\u767a\u8005\u306e\u8cac\u4efb\u3067\u306f [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u3011\u5f02\u5e38\u5904\u7406\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-30T07:53:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-03T19:56:02+00:00\" \/>\n<meta name=\"author\" content=\"\u6587, \u7fd4\" 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