Springmvc常见问题

/*
 * Copyright 2002-2017 the original author or authors.
 *
 * Licensed under the Apache License,Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,software
 * distributed under the License is distributed on an "AS IS" BASIS,* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.web.bind.annotation;

import java.lang.annotation.Documented;
 java.lang.annotation.ElementType;
 java.lang.annotation.Retention;
 java.lang.annotation.RetentionPolicy;
 java.lang.annotation.Target;

 org.springframework.stereotype.Controller;

/**
 * A convenience annotation that is itself annotated with
 * {@link Controller @Controller} and { ResponseBody @ResponseBody}.
 * <p>
 * Types that carry this annotation are treated as controllers where
 * { RequestMapping @RequestMapping} methods assume
 * { ResponseBody @ResponseBody} semantics by default.
 *
 * <p><b>NOTE:</b> {@code @RestController} is processed if an appropriate
 * { HandlerMapping}-{ HandlerAdapter} pair is configured such as the
 * { RequestMappingHandlerMapping}-{ RequestMappingHandlerAdapter}
 * pair which are the default in the MVC Java config and the MVC namespace.
 * In particular { @RestController} is not supported with the
 * { DefaultAnnotationHandlerMapping}-{ AnnotationMethodHandlerAdapter}
 * pair both of which are also deprecated.
 *
 * @author Rossen Stoyanchev
 *  Sam Brannen
 * @since 4.0
 */
@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)
     *  4.0.1
     
    String value() default "";

}

 org.springframework.stereotype;


 * Indicates that an annotated class is a "Controller" (e.g. a web controller).
 *
 * <p>This annotation serves as a specialization of { Component @Component},* allowing for implementation classes to be autodetected through classpath scanning.
 * It is typically used in combination with annotated handler methods based on the
 * { org.springframework.web.bind.annotation.RequestMapping} annotation.
 *
 *  Arjen Poutsma
 *  Juergen Hoeller
 *  2.5
 * @see Component
 *  org.springframework.web.bind.annotation.RequestMapping
 *  org.springframework.context.annotation.ClassPathBeanDefinitionScanner
 
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
 Controller {

    ;

}

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        property name="basePackage" value="com.eluzhu.rms.mapper"/>
    </bean>

 <!-- FastJson注入 -->
    mvc:annotation-drivenmvc:message-converters register-defaults="true">
             避免IE执行AJAX时,返回JSON出现下载文件 -->
             FastJson id="fastJsonHttpMessageConverter"
                  class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                ="supportedMediaTypes">
                    list>
                         这里顺序不能反，一定先写text/html,不然ie下出现下载提示 -->
                        value>text/html;charset=UTF-8>application/json;charset=UTF-8propertymvc:message-converters>
    >