差異處
這裏顯示兩個版本的差異處。
| 下次修改 | 前次修改 | ||
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java:guice:helloworld [2013/11/08 17:28] tony 建立 |
java:guice:helloworld [2023/06/25 09:48] (目前版本) |
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|---|---|---|---|
| 行 1: | 行 1: | ||
| {{tag>java guice}} | {{tag>java guice}} | ||
| - | ====== Hello World! ====== | + | ====== Guice - Hello World! ====== |
| 這個範例主要了解Guice如何實做Dependency Injection(DI)。 | 這個範例主要了解Guice如何實做Dependency Injection(DI)。 | ||
| ===== 準備 ===== | ===== 準備 ===== | ||
| 行 57: | 行 57: | ||
| public static void main(String[] args) { | public static void main(String[] args) { | ||
| - | System.setProperty("printer.mode", "console"); | ||
| - | |||
| Injector injector = Guice.createInjector(new PrinterModule()); | Injector injector = Guice.createInjector(new PrinterModule()); | ||
| PrinterClient printerClient = injector.getInstance(PrinterClient.class); | PrinterClient printerClient = injector.getInstance(PrinterClient.class); | ||
| 行 76: | 行 74: | ||
| @Override | @Override | ||
| public void configure(Binder binder) { | public void configure(Binder binder) { | ||
| - | String mode = System.getProperty("printer.mode"); | + | binder.bind(IPrintService.class).to(ConsolePrinter.class); |
| - | if( mode.equals("console") ){ | + | |
| - | binder.bind(IPrintService.class).to(ConsolePrinter.class); | + | |
| - | }else { | + | |
| - | throw new RuntimeException("Can't find suitable printer mode."); | + | |
| - | } | + | |
| } | } | ||
| } | } | ||
| 行 89: | 行 82: | ||
| \\ | \\ | ||
| 友藏內心獨白: 照這樣看來Guice是蠻簡單的! | 友藏內心獨白: 照這樣看來Guice是蠻簡單的! | ||
| + | ===== ===== | ||
| + | ---- | ||
| + | \\ | ||
| + | ~~DISQUS~~ | ||
