spring mvc返回json串解决手机应用网络请求二-优快云博客

本文介绍了如何在Spring MVC中使用注解实现JSON数据的返回，并展示了具体的代码示例，包括@Controller、@RequestMapping及@ResponseBody等注解的应用。

转载：http://www.apk-doc.net/spring-mvc/spring-mvc-json-2.html

前面第一篇讲述了，搭建spring mvc环境，这里我们主要使用spring mvc的注解方式快速构建web

注解：

@Controller 表示控制器

@RequestMapping("/hello") 表示控制器访问路径为/hello

@ResponseBody 表示返回的是json串

/**
 * 
 *  @author 喧嚣求静
 * 
 * blog:www.apk-doc.net
 * 
 * 
 * 
 * 
 * */
 
@Controller
public class HelloWorldController {
 
	@RequestMapping("/hello")
	public String hello(
			@RequestParam(value = "name", required = false, defaultValue = "World") String name,
			Model model) {
		model.addAttribute("name", name);
		return "helloworld";
	}
 
	@RequestMapping("/hello2")
	@ResponseBody
	public Map<String, Object> hello2(HttpServletRequest request,
			HttpServletResponse response, HttpSession session) {
		String name = request.getParameter("name");
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("name", name);
 
		return map;
	}
}

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
 
 
http://www.springframework.org/schema/mvc
 
 
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
 
 
http://www.springframework.org/schema/context
 
              http://www.springframework.org/schema/context/spring-context-3.0.xsd">
 
	<context:component-scan base-package="com.smsc"/>
 
 
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix">
			<value>/WEB-INF/views/</value>
		</property>
		<property name="suffix">
			<value>.jsp</value>
		</property>
	</bean>
 
 
 
	<bean
		class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
 
		<property name="messageConverters">
			<list>
				<ref bean="stringHttpMessageConverter" />
				<ref bean="mappingJacksonHttpMessageConverter" />
			</list>
		</property>
 
	</bean>
	<bean id="stringHttpMessageConverter"
		class="org.springframework.http.converter.StringHttpMessageConverter">
		<property name="supportedMediaTypes">
			<list>
				<value>text/plain;charset=UTF-8</value>
				<value>text/html;charset=UTF-8</value>
			</list>
		</property>
 
	</bean>
 
	<bean id="mappingJacksonHttpMessageConverter"
		class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
 
		<property name="supportedMediaTypes">
			<list>
				<value>application/json;charset=UTF-8</value>
				<value>text/html;charset=UTF-8</value>
			</list>
		</property>
 
	</bean>
	<mvc:annotation-driven
		content-negotiation-manager="contentNegotiationManager" />
	<bean id="contentNegotiationManager"
		class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
		<property name="favorPathExtension" value="false" />
		<property name="favorParameter" value="false" />
		<property name="ignoreAcceptHeader" value="false" />
		<property name="mediaTypes">
			<value>
				atom=application/atom+xml
				html=text/html
				json=application/json
				*=*/*  
        </value>
		</property>
	</bean>
</beans>