Update 65.1. Write a JSON REST service.md
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### 65.1. 编写一个JSON REST服务
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在Spring Boot应用中,任何Spring `@RestController`默认应该渲染为JSON响应,只要classpath下存在Jackson2。例如:
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```java
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@RestController
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public class MyController {
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@RequestMapping("/thing")
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public MyThing thing() {
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return new MyThing();
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}
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}
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```
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只要MyThing能够通过Jackson2序列化(比如,一个标准的POJO或Groovy对象),[localhost:8080/thing](http://localhost:8080/thing)默认响应一个JSON表示。有时在一个浏览器中你可能看到XML响应因为浏览器倾向于发送XML
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响应头。
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