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@RestController注解 = @ResponseBody ＋ @Controller
@Controller：配合视图解析器InternalResourceViewResolver，返回到指定页面
@RestController：返回json数据
@ResponseBody：将java对象转为json格式的数据
@RequestMapping：指定路由映射
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Controller
@ResponseBody
public @interface RestController {
/**
* The value may indicate a suggestion for a logical component name,
* to be turned into a Spring bean in case of an autodetected component.
* @return the suggested component name, if any (or empty String otherwise)
* @since 4.0.1
*/
@AliasFor(annotation = Controller.class)
String value() default "";
}
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
public @interface Controller {
/**
* The value may indicate a suggestion for a logical component name,
* to be turned into a Spring bean in case of an autodetected component.
* @return the suggested component name, if any (or empty String otherwise)
*/
@AliasFor(annotation = Component.class)
String value() default "";
}
@Controller 通常是被使用服务于web 页面的。默认controller方法返回的是一个string 串，表示要展示哪个模板页面或者是要跳转到哪里去。
@Controller
@Api(tags= {"请求404的特殊处理,返回index.html页面"})
public class NotFoundErrorController implements ErrorController{
private static final String ERROR_PATH = "/error";
@RequestMapping(value=ERROR_PATH)
public ModelAndView handleError(HttpServletRequest request,HttpServletResponse response) {
if(HttpStatus.NOT_FOUND.value() == response.getStatus()) {
return new ModelAndView("/index.html");
}
return new ModelAndView();
}
@Override
public String getErrorPath() {
return ERROR_PATH;
}
}
@RestController 就是专门用在编写API的时候，返回一个JSON或者是XML等等。
@RestController
@RequestMapping("/nvwa-nros/v1/app")
@Api(tags= {"功能App"})
public class AppController {
@Autowired
private IAppService appService;
/**
* 查询所有的应用
* @return
*/
@GetMapping("/list")
@ApiOperation(value="查询所有的应用",notes="查询所有的应用")
public List<App> allApps(){
List<App> theAllApp = appService.select();
return theAllApp;
}
}
