{"id":39123,"date":"2023-11-05T10:10:30","date_gmt":"2023-11-20T18:15:39","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8angular%e7%9a%84http-get%e3%80%90%e8%b6%85%e7%ba%a7%e5%88%9d%e5%ad%a6%e8%80%85%e3%80%91%e3%80%82\/"},"modified":"2024-05-04T07:38:20","modified_gmt":"2024-05-03T23:38:20","slug":"%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8angular%e7%9a%84http-get%e3%80%90%e8%b6%85%e7%ba%a7%e5%88%9d%e5%ad%a6%e8%80%85%e3%80%91%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8angular%e7%9a%84http-get%e3%80%90%e8%b6%85%e7%ba%a7%e5%88%9d%e5%ad%a6%e8%80%85%e3%80%91%e3%80%82\/","title":{"rendered":"\u5c1d\u8bd5\u4f7f\u7528Angular\u7684http.get\u3010\u8d85\u7ea7\u521d\u5b66\u8005\u3011"},"content":{"rendered":"

\u6211\u60f3\u5199\u4e0b\u4e00\u4efd\u6709\u5173\u5728Angular\u4e2d\u8fdb\u884c\u5f02\u6b65\u901a\u4fe1\u7684\u65b9\u6cd5\u5907\u5fd8\u5f55\uff0c\u4ee5\u5c3d\u53ef\u80fd\u7b80\u660e\u6613\u61c2\u5730\u4e3a\u5bf9TypeScript\u548cAngular\u4e0d\u592a\u719f\u6089\u7684\u4eba\u505a\u51c6\u5907\u3002<\/p>\n

\u4f7f\u7528\u7684\u7248\u672c<\/h2>\n
kuniatsu$ ng -v\r\n    _                      _                 ____ _     ___\r\n   \/ \\   _ __   __ _ _   _| | __ _ _ __     \/ ___| |   |_ _|\r\n  \/ \u25b3 \\ | '_ \\ \/ _` | | | | |\/ _` | '__|   | |   | |    | |\r\n \/ ___ \\| | | | (_| | |_| | | (_| | |      | |___| |___ | |\r\n\/_\/   \\_\\_| |_|\\__, |\\__,_|_|\\__,_|_|       \\____|_____|___|\r\n               |___\/\r\n@angular\/cli: 1.1.3\r\nnode: 7.5.0\r\nos: darwin x64\r\n@angular\/animations: 4.3.2\r\n@angular\/common: 4.3.2\r\n@angular\/compiler: 4.3.2\r\n@angular\/core: 4.3.2\r\n@angular\/forms: 4.3.2\r\n@angular\/http: 4.3.2\r\n@angular\/platform-browser: 4.3.2\r\n@angular\/platform-browser-dynamic: 4.3.2\r\n@angular\/router: 4.3.2\r\n@angular\/cli: 1.1.3\r\n@angular\/compiler-cli: 4.3.2\r\n@angular\/language-service: 4.3.2\r\nkuniatsu$ npm -v\r\n4.1.2\r\n<\/code><\/pre>\n
\u6587\u4ef6\u5939\u7ed3\u6784<\/h2>\n
\u6587\u4ef6\u51e0\u4e4e\u90fd\u88ab\u7701\u7565\u4e86\u3002<\/p>\n
\r\n.\r\n\u251c\u2500\u2500 README.md\r\n\u251c\u2500\u2500 e2e\r\n\u251c\u2500\u2500 node_modules\r\n\u251c\u2500\u2500 src\r\n\u2502\u00a0\u00a0 \u251c\u2500\u2500 app\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u251c\u2500\u2500 app.component.css\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u251c\u2500\u2500 app.component.html\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u251c\u2500\u2500 app.component.ts\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u251c\u2500\u2500 app.component.spec.ts\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u2514\u2500\u2500 app.module.ts\r\n\u2502\u00a0\u00a0 \u251c\u2500\u2500 assets\r\n\u2502\u00a0\u00a0 \u2514\u2500\u2500 environments\r\n\u251c\u2500\u2500 .angular-cli.json\r\n\u2514\u2500\u2500 package.json\r\n\r\n<\/code><\/pre>\n
app.module.ts \u7684\u4e2d\u6587\u89e3\u91ca\u662f\u4ec0\u4e48\uff1f<\/h2>\n
\u9996\u5148\uff0c\u5728app.module.ts\u4e2d\u6dfb\u52a0HttpModule\u3002HttpModule\u662f\u4e00\u4e2a\u7528\u4e8e\u6dfb\u52a0HTTP\u5ba2\u6237\u7aef\u529f\u80fd\u7684\u6a21\u5757\u3002<\/p>\n
import<\/span> {<\/span> BrowserModule<\/span> }<\/span> from<\/span> '<\/span>@angular\/platform-browser<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> NgModule<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> AppComponent<\/span> }<\/span> from<\/span> '<\/span>.\/app.component<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span>HttpModule<\/span>}<\/span> from<\/span> \"<\/span>@angular\/http<\/span>\"<\/span>;<\/span>\/\/\u3053\u3053\u3092\u8ffd\u52a0<\/span>\r\n\r\n@<\/span>NgModule<\/span>({<\/span>\r\n  declarations<\/span>:<\/span> [<\/span>\r\n    AppComponent<\/span>\r\n  ],<\/span>\r\n  imports<\/span>:<\/span> [<\/span>\r\n    BrowserModule<\/span>,<\/span>\r\n    HttpModule<\/span>\/\/\u3053\u3053\u3092\u8ffd\u52a0<\/span>\r\n  ],<\/span>\r\n  providers<\/span>:<\/span> [],<\/span>\r\n  bootstrap<\/span>:<\/span> [<\/span>AppComponent<\/span>]<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> AppModule<\/span> {<\/span> }<\/span>\r\n\r\n\r\n<\/code><\/pre>\n
app.component.ts \u7ec4\u4ef6<\/h2>\n
\u63a5\u4e0b\u6765\u5728app.component.ts\u6587\u4ef6\u4e2d\u5b9e\u73b0\u83b7\u53d6\u529f\u80fd\u3002
\n\u4e3a\u4e86\u65b9\u4fbf\u4e0d\u4e86\u89e3TypeScript\u7684\u4eba\u9605\u8bfb\uff0c\u6211\u7279\u610f\u5199\u5f97\u5f88\u957f\u3002
\n\u6211\u5c3d\u91cf\u4ee5\u7c7b\u4f3cJava\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u3002<\/p>\n
import<\/span> {<\/span> Component<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span>Http<\/span>,<\/span> Response<\/span>}<\/span> from<\/span> \"<\/span>@angular\/http<\/span>\"<\/span>;<\/span>\r\n\r\n@<\/span>Component<\/span>({<\/span>\r\n  selector<\/span>:<\/span> '<\/span>app-root<\/span>'<\/span>,<\/span>\r\n  templateUrl<\/span>:<\/span> '<\/span>.\/app.component.html<\/span>'<\/span>,<\/span>\r\n  styleUrls<\/span>:<\/span> [<\/span>'<\/span>.\/app.component.css<\/span>'<\/span>]<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> AppComponent<\/span> {<\/span>\r\n  private<\/span> http<\/span>:<\/span>Http<\/span>;<\/span>\r\n  \/\/\u975e\u540c\u671f\u901a\u4fe1\u5148\u306eURL\u3092\u6307\u5b9a\u3059\u308b\u3002<\/span>\r\n  URL<\/span> =<\/span> '<\/span>assets\/test.json<\/span>'<\/span>;<\/span>\r\n\r\n  \/\/\u300c\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u300d\u30af\u30e9\u30b9\u304c\u5b9f\u4f53\u5316\u3055\u308c\u305f\u6642\u306b\u8d70\u308b<\/span>\r\n  constructor<\/span>(<\/span>http<\/span>:<\/span>Http<\/span>){<\/span>\r\n    this<\/span>.<\/span>http<\/span> =<\/span> http<\/span>;<\/span>\r\n  }<\/span>\r\n\r\n  getMethod<\/span>(){<\/span>\r\n    \/\/http.get\u3092\u3059\u308b\u305f\u3081\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u751f\u6210<\/span>\r\n    var<\/span> httpObj<\/span> =<\/span> this<\/span>.<\/span>http<\/span>.<\/span>get<\/span>(<\/span>this<\/span>.<\/span>URL<\/span>);<\/span>\r\n    \/\/\u6210\u529f\u6642\u30fb\u5931\u6557\u6642\u306e\u52d5\u4f5c\u3092\u6307\u5b9a\u3059\u308b\u3002<\/span>\r\n    httpObj<\/span>.<\/span>subscribe<\/span>(<\/span>this<\/span>.<\/span>getSuccess<\/span>,<\/span>this<\/span>.<\/span>getError<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  \/\/http.get\u304c\u6210\u529f\u3057\u305f\u6642\u306b\u8d70\u308b\u30e1\u30bd\u30c3\u30c9<\/span>\r\n  getSuccess<\/span>(<\/span>response<\/span>:<\/span>Response<\/span>){<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>response<\/span>.<\/span>text<\/span>());<\/span>\r\n  }<\/span>\r\n\r\n  \/\/http.get\u304c\u5931\u6557\u3057\u305f\u6642\u306b\u8d70\u308b\u30e1\u30bd\u30c3\u30c9<\/span>\r\n  getError<\/span>(<\/span>error<\/span>){<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5e94\u7528\u7ec4\u4ef6HTML<\/h2>\n
\u5728html\u4e2d\u7f16\u5199\u70b9\u51fb\u4e8b\u4ef6\uff0c\u4ee5\u4f7f\u901a\u8fc7app.component.ts\u521b\u5efa\u7684getMethod()\u65b9\u6cd5\u8fd0\u884c\u3002<\/p>\n
<button<\/span> (click)=<\/span>\"getMethod()\"<\/span>><\/span>Get!<\/button><\/span>\r\n<\/code><\/pre>\n
\u6d4b\u8bd5.json<\/h2>\n
\u56e0\u4e3a\u76ee\u524d\u6ca1\u6709\u8981\u9605\u8bfb\u7684\u6587\u4ef6\uff0c\u6240\u4ee5\u9700\u8981\u6839\u636eapp.component.ts\u7684URL\u6307\u5b9a\u521b\u5efatest.json\u6587\u4ef6\u3002<\/p>\n
{<\/span>\r\n  \"name\"<\/span>:<\/span>\"test.json\"<\/span>,<\/span>\r\n  \"level\"<\/span>:<\/span>\"easy\"<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5c06\u521b\u5efa\u7684test.json\u6587\u4ef6\u653e\u5165assets\u6587\u4ef6\u5939\u4e2d\u3002<\/p>\n
\r\n.\r\n\u251c\u2500\u2500 README.md\r\n\u251c\u2500\u2500 e2e\r\n\u251c\u2500\u2500 node_modules\r\n\u251c\u2500\u2500 src\r\n\u2502\u00a0\u00a0 \u251c\u2500\u2500 app\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u251c\u2500\u2500 app.component.css\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u251c\u2500\u2500 app.component.html\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u251c\u2500\u2500 app.component.ts\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u251c\u2500\u2500 app.component.spec.ts\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u2514\u2500\u2500 app.module.ts\r\n\u2502\u00a0\u00a0 \u251c\u2500\u2500 assets\r\n\u2502\u00a0\u00a0 \u2502\u00a0\u00a0 \u2514\u2500\u2500 test.json\r\n\u2502\u00a0\u00a0 \u2514\u2500\u2500 environments\r\n\u251c\u2500\u2500 .angular-cli.json\r\n\u2514\u2500\u2500 package.json\r\n\r\n<\/code><\/pre>\n
\u6267\u884c<\/h2>\n
\u7528\u8fd9\u4e2a\u547d\u4ee4\u201cng serve\u201d\u6765\u6267\u884c\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n
\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n
\u6ca1\u6709\u95ee\u9898\uff0c\u53ef\u4ee5\u770b\u5230\u5df2\u7ecf\u63d0\u53d6\u51fa\u4e86\u521b\u5efa\u7684JSON\u7684\u5185\u5bb9\u3002<\/p>\n
\u6784\u9020\u51fd\u6570\u7684\u7f16\u5199\u65b9\u5f0f\u6539\u53d8<\/h2>\n
\u56e0\u4e3aapp.component.ts\u7684\u5199\u6cd5\u4e0d\u592a\u50cfTypeScript\uff0c\u6240\u4ee5\u6211\u4f1a\u5c06\u5176\u6539\u6210\u5e38\u89c1\u7684\u5199\u6cd5\u3002<\/p>\n
\u9996\u5148\uff0c\u5982\u679c\u8981\u5c06\u6784\u9020\u51fd\u6570\u7684\u53c2\u6570\u8d4b\u503c\u7ed9\u6210\u5458\u53d8\u91cf\uff0c\u53ef\u4ee5\u4ec5\u7701\u7565\u6784\u9020\u51fd\u6570\u7684\u53c2\u6570\u3002<\/p>\n
export<\/span> class<\/span> AppComponent<\/span> {<\/span>\r\n  private<\/span> http<\/span>:<\/span>Http<\/span>;<\/span>\r\n  constructor<\/span>(<\/span>http<\/span>:<\/span>Http<\/span>){<\/span>\r\n    this<\/span>.<\/span>http<\/span> =<\/span> http<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u8fd9\u6837\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n
export<\/span> class<\/span> AppComponent<\/span> {<\/span>\r\n  constructor<\/span>(<\/span>private<\/span> http<\/span>:<\/span>Http<\/span>){}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u533f\u540d\u51fd\u6570<\/h2>\n
\u4e0b\u9762\u6211\u4eec\u6765\u5c1d\u8bd5\u4f7f\u7528ES6\u4e2d\u5f15\u5165\u7684Lambda\u8868\u8fbe\u5f0f\u3002<\/p>\n
  getSuccess<\/span>(<\/span>response<\/span>:<\/span>Response<\/span>){<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>response<\/span>.<\/span>text<\/span>());<\/span>\r\n  }<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u4e2a\u53ef\u4ee5\u7528\u4ee5\u4e0b\u7684\u65b9\u5f0f\u6765\u6539\u5199\u3002<\/p>\n
  getSuccess<\/span> =<\/span> response<\/span>=><\/span>{<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>response<\/span>.<\/span>text<\/span>());<\/span>\r\n  }<\/span>\r\n<\/code><\/pre>\n
\u7701\u7565\u53d8\u91cf<\/h2>\n
\u53e6\u5916\uff0c\u7531\u4e8e\u53ef\u4ee5\u76f4\u63a5\u5199\u53d8\u91cf\u7684\u5185\u5bb9\uff0c\u6240\u4ee5<\/p>\n
\r\n  getMethod<\/span>(){<\/span>\r\n    var<\/span> httpObj<\/span> =<\/span> this<\/span>.<\/span>http<\/span>.<\/span>get<\/span>(<\/span>this<\/span>.<\/span>URL<\/span>);<\/span>\r\n    httpObj<\/span>.<\/span>subscribe<\/span>(<\/span>this<\/span>.<\/span>getSuccess<\/span>,<\/span>this<\/span>.<\/span>getError<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  \/\/http.get\u304c\u6210\u529f\u3057\u305f\u6642\u306b\u8d70\u308b\u30e1\u30bd\u30c3\u30c9<\/span>\r\n  getSuccess<\/span> =<\/span> response<\/span>=><\/span>{<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>response<\/span>.<\/span>text<\/span>());<\/span>\r\n  }<\/span>\r\n\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u8fd9\u4e2a\u53ef\u4ee5\u6839\u636e\u4ee5\u4e0b\u7684\u65b9\u5f0f\u8fdb\u884c\u6539\u5199\u3002<\/p>\n
\r\n  getMethod<\/span>(){<\/span>\r\n    var<\/span> httpObj<\/span> =<\/span> this<\/span>.<\/span>http<\/span>.<\/span>get<\/span>(<\/span>this<\/span>.<\/span>URL<\/span>);<\/span>\r\n    httpObj<\/span>.<\/span>subscribe<\/span>(<\/span>response<\/span>=><\/span>{<\/span>\r\n     console<\/span>.<\/span>log<\/span>(<\/span>response<\/span>.<\/span>text<\/span>());<\/span>\r\n    },<\/span>\r\n     this<\/span>.<\/span>getError<\/span>\r\n    );<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5982\u679c\u5c06\u8fd9\u4e2a\u9519\u8bef\u4f20\u8fbe\u7ed9\u9519\u8bef\u65b9<\/p>\n
\r\n  getMethod<\/span>(){<\/span>\r\n    var<\/span> httpObj<\/span> =<\/span> this<\/span>.<\/span>http<\/span>.<\/span>get<\/span>(<\/span>this<\/span>.<\/span>URL<\/span>);<\/span>\r\n    httpObj<\/span>.<\/span>subscribe<\/span>(<\/span>response<\/span>=><\/span>{<\/span>\r\n     console<\/span>.<\/span>log<\/span>(<\/span>response<\/span>.<\/span>text<\/span>());<\/span>\r\n    },<\/span>error<\/span>=><\/span>{<\/span>\r\n     console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span> \r\n    });<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u8fd9\u4e00\u53e5\u8bdd\u7684\u8868\u8fbe\u5982\u4e0b\u3002<\/p>\n
\u6700\u540e\uff0c\u65e0\u9700\u518d\u5c06httpObj\u91cd\u65b0\u5206\u914d\u7ed9\u53d8\u91cf\u3002<\/p>\n
\r\n  getMethod<\/span>(){<\/span>\r\n    this<\/span>.<\/span>http<\/span>.<\/span>get<\/span>(<\/span>this<\/span>.<\/span>URL<\/span>)<\/span>\r\n    .<\/span>subscribe<\/span>(<\/span>response<\/span>=><\/span>{<\/span>\r\n     console<\/span>.<\/span>log<\/span>(<\/span>response<\/span>.<\/span>text<\/span>());<\/span>\r\n    },<\/span>error<\/span>=><\/span>{<\/span>\r\n     console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span> \r\n    });<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u7528\u4e0b\u9762\u8fd9\u79cd\u65b9\u5f0f\u6765\u5199\u3002<\/p>\n
\u5b8c\u6210\u72b6\u6001<\/h2>\n
\u6839\u636e\u4e0a\u8ff0\u60c5\u51b5\u6765\u5199\uff0c<\/p>\n
import<\/span> {<\/span> Component<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span>Http<\/span>,<\/span> Response<\/span>}<\/span> from<\/span> \"<\/span>@angular\/http<\/span>\"<\/span>;<\/span>\r\n\r\n@<\/span>Component<\/span>({<\/span>\r\n  selector<\/span>:<\/span> '<\/span>app-root<\/span>'<\/span>,<\/span>\r\n  templateUrl<\/span>:<\/span> '<\/span>.\/app.component.html<\/span>'<\/span>,<\/span>\r\n  styleUrls<\/span>:<\/span> [<\/span>'<\/span>.\/app.component.css<\/span>'<\/span>]<\/span>\r\n})<\/span>\r\nexport<\/span> class<\/span> AppComponent<\/span> {<\/span>\r\n  \/\/\u975e\u540c\u671f\u901a\u4fe1\u5148\u306eURL\u3092\u6307\u5b9a\u3059\u308b\u3002<\/span>\r\n  URL<\/span> =<\/span> '<\/span>assets\/test.json<\/span>'<\/span>;<\/span>\r\n\r\n  \/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u30af\u30e9\u30b9\u304c\u5b9f\u4f53\u5316\u3055\u308c\u305f\u6642\u306b\u8d70\u308b<\/span>\r\n  constructor<\/span>(<\/span>private<\/span> http<\/span>:<\/span>Http<\/span>){}<\/span>\r\n\r\n\r\n  getMethod<\/span>(){<\/span>\r\n    this<\/span>.<\/span>http<\/span>.<\/span>get<\/span>(<\/span>this<\/span>.<\/span>URL<\/span>)<\/span>\r\n    .<\/span>subscribe<\/span>(<\/span>response<\/span>=><\/span>{<\/span>\r\n     \/\/\u6210\u529f\u6642\u306e\u51e6\u7406<\/span>\r\n     console<\/span>.<\/span>log<\/span>(<\/span>response<\/span>.<\/span>text<\/span>());<\/span>\r\n    },<\/span>error<\/span>=><\/span>{<\/span>\r\n\u3000\u3000<\/span> \/\/\u5931\u6557\u6642\u306e\u51e6\u7406<\/span>\r\n     console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span> \r\n    });<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u6211\u53ef\u4ee5\u770b\u51fa\uff0c\u4f60\u5199\u5f97\u975e\u5e38\u6e05\u695a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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