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

/* * 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.stereotype; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; /** * Indicates that an annotated class is a "Controller" (e.g. a web controller). * * <p>This annotation serves as a specialization of {@link 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 * {@link org.springframework.web.bind.annotation.RequestMapping} annotation. * * @author Arjen Poutsma * @author Juergen Hoeller * @since 2.5 * @see Component * @see org.springframework.web.bind.annotation.RequestMapping * @see org.springframework.context.annotation.ClassPathBeanDefinitionScanner */ @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) */ String value() default ""; }

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

 <!-- FastJson注入 --> <mvc:annotation-driven> <mvc:message-converters register-defaults="true"> <!-- 避免IE执行AJAX时,返回JSON出现下载文件 --> <!-- FastJson --> <bean id="fastJsonHttpMessageConverter" class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter"> <property name="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</value> <value>application/json;charset=UTF-8</value> </list> </property> </bean> </mvc:message-converters> </mvc:annotation-driven>