springmvc的常见注解

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1. @Controller  
Controller控制器是通过服务接口定义的提供访问应用程序的一种行为,它解释用户的输入,将其转换成一个模型然后将试图呈献给用户。Spring MVC 使用 @Controller 定义控制器,它还允许自动检测定义在类路径下的组件并自动注册。如想自动检测生效,需在XML头文件下引入 spring-context:
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"                                             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"                                             xmlns:context="http://www.springframework.org/schema/context"                                             xsi:schemaLocation="        http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd">    <context:component-scan base-package="org.springframework.samples.petclinic.web"/>    <!-- ... --></beans>

 2. @RequestMapping
我们可以 @RequestMapping 注解将类似 “/favsoft”这样的URL映射到整个类或特定的处理方法上。一般来说,类级别的注解映射特定的请求路径到表单控制器上,而方法级别的注解只是映射为一个特定的HTTP方法请求(“GET”,“POST”等)或HTTP请求参数。
import org.springframework.stereotype.Controller;import org.springframework.validation.BindingResult;import org.springframework.validation.annotation.Validated;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;import java.text.DateFormat;import java.text.SimpleDateFormat;@Controller@RequestMapping("/favsoft")public class AnnotationController {    @RequestMapping(method= RequestMethod.GET)    public String get(){        return "";    }    @RequestMapping(value="/getName", method = RequestMethod.GET)    public String getName(String userName) {        return userName;    }    @RequestMapping(value="/{day}", method=RequestMethod.GET)    public String getDay(Date day){        DateFormat df = new SimpleDateFormat("yyyy-MM-dd");        return df.format(day);    }    @RequestMapping(value="/addUser", method=RequestMethod.GET)    public String addFavUser(@Validated FavUser favUser, BindingResult result){        if(result.hasErrors()){            return "favUser";        }        //favUserService.addFavUser(favUser);        return "redirect:/favlist";    }    @RequestMapping("/test")    @ResponseBody    public String test(){        return "aa";    }}
                                             
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