Spring常用配置及解析类 Spring常用配置及解析类说明
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springMVC配置用法的文章很多，但具体描述清楚的不多，这里主要介绍下常用的配置项的用法，以及它的解析类，springMVC处理内容有两种方式，一种是converter,另一种是ViewResolver，两种都能处理json，xml以及form内容格式。
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:c="http://www.springframework.org/schema/c"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd">
<!-- 如果controller里要用到配置，才需要加载配置，因为一般这个配置由DispatchServlet来加载，和spring监听类不在一个上下文里，想要知道原因请看
http://blog.csdn.net/strivezxq/article/details/43795081 这篇文章详细解析了spring初始化过程 -->
<context:property-placeholder location="classpath:app.properties" />
<!--Scans the classpath for annotated components @Component, @Repository, @Service, and @Controller
通过use-default-filters="false",可以设置只扫描哪些注释，一般springMVC配置只加载下面两种注释
-->
<context:component-scan base-package="your.base.package" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
<context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
</context:component-scan>
<!-- <context:component-scan annotation-config = "true">已经包含了context:annotation-configr的功能，所以这个配置基本没必要配置，激活在bean类中被检测到的各种注释：Spring's @Required and
@Autowired, as well as JSR 250's @PostConstruct, @PreDestroy and @Resource (if available),
JAX-WS's @WebServiceRef (if available), EJB3's @EJB (if available), and JPA's
@PersistenceContext and @PersistenceUnit (if available) -->
<context:annotation-config />
<!--会在Spring MVC上下文中定义一个 org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler， 它会像一个检查员，对进入DispatcherServlet的URL进行筛查，如果发现是静态资源的请求，就将该请求转由Web应用服务器默认的 Servlet处理，如果不是静态资源的请求，才由DispatcherServlet继续处理。
一般Web应用服务器默认的Servlet名称是"default"，因此DefaultServletHttpRequestHandler可以 找到它。如果你所有的Web应用服务器的默认Servlet名称不是"default"，则需要通过default-servlet-name属性显示指 定：
<mvc:default-servlet-handler default-servlet-name="所使用的Web服务器默认使用的Servlet名称" />
Tomcat, Jetty, JBoss, and GlassFish默认名称为default, eg: web.xml中
1. <servlet-mapping>
2. <servlet-name>default</servlet-name>
3. <url-pattern>*.jpg</url-pattern>
4. </servlet-mapping>
5. <servlet-mapping>
6. <servlet-name>default</servlet-name>
7. <url-pattern>*.js</url-pattern>
8. </servlet-mapping>
9. <servlet-mapping>
10. <servlet-name>default</servlet-name>
11. <url-pattern>*.css</url-pattern>
12. </servlet-mapping>
如果不配置springdefault-servlet-name 默认会设置，已经支持常用的web服务器
-->
<mvc:default-servlet-handler />
<!-- 允许静态资源放在任何地方 ，处理类org.springframework.web.servlet.resource.ResourceHttpRequestHandler
<bean id="resourceHttpRequestHandler" class="org.springframework.web.servlet.resource.ResourceHttpRequestHandler">
<property name="locations" value="classpath:/META-INF/resources/"></property>
</bean>
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/resources/**">resourceHttpRequestHandler</prop>
</props>
</property>
</bean>
下面标签实现
-->
<mvc:resources mapping="/resources/**" location="/resources/"></mvc:resources>
<!--
register "global" interceptor beans to apply to all registered HandlerMappings .
Each inteceptor must implement the org.springframework.web.servlet.HandlerInterceptor or
org.springframework.web.context.request.WebRequestInterceptor interface
-->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**" />
<mvc:exclude-mapping path="/css/**" />
<mvc:exclude-mapping path="/js/**" />
<mvc:exclude-mapping path="/images/**" />
<bean class="com.fpx.common.auth.mgt.framework.interceptor.ContextInterceptor" />
</mvc:interceptor>
</mvc:interceptors>
<!-- Turns on support for mapping requests to Spring MVC @Controller methods
Also registers default Formatters and Validators for use across all @Controllers
配置解析类：org.springframework.web.servlet.config.AnnotationDrivenBeanDefinitionParser
配置content-negotiation-anager可以在url里设置内容类型参数,可以设置默认内容类型
<bean id="contentNegotiationManagerFactoryBean" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean"
p:favorPathExtension="false" p:favorParameter="true" p:parameterName="format" p:ignoreAcceptHeader="true"
p:defaultContentType="application/json">
<property name="mediaTypes">
<props>
<prop key="json">application/json</prop>
<prop key="xml">application/xml</prop>
</props>
</property>
</bean>
-->
<mvc:annotation-driven content-negotiation-anager="contentNegotiationManagerFactoryBean">
<mvc:message-converters>
<ref bean="stringHttpMessageConverter" />
<ref bean="jsonHttpMessageConverter" />
<ref bean="marshallingHttpMessageConverter" />
</mvc:message-converters>
</mvc:annotation-driven>
<!-- 内容管理工厂 -->
<bean
class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean"
p:favorPathExtension="false" p:favorParameter="true"
p:parameterName="format" p:ignoreAcceptHeader="true"
p:defaultContentType="application/json">
<property name="mediaTypes">
<props>
<prop key="json">application/json</prop>
<prop key="xml">application/xml</prop>
</props>
</property>
</bean>
<!-- 内容解析器 ，可以p:parameterName="format"来配置返回参数类型 ，通过p:defaultContentType配置默认请求内容类型，
c:qualityValue="0.5" 可以设置内容类型的优先级， 如果使用了mvc:annotation-driven 和注解方式（@RequestBody）, 下面配置是不生效的-->
<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="contentNegotiationManager" ref= "contentNegotiationManagerFactoryBean">
</property>
<property name="defaultViews">
<list>
<bean
class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
<property name="modelKey" value="resultVo" />
<property name="extractValueFromSingleKeyModel" value="true" />
</bean>
<bean class="org.springframework.web.servlet.view.xml.MarshallingView">
<constructor-arg ref="jaxb2Marshaller" />
<property name="contentType" value="application/xml" />
</bean>
</list>
</property>
<!-- <property name="ignoreAcceptHeader" value="true" /> -->
</bean>
<!-- XML view using a JAXB marshaller -->
<bean id="jaxb2Marshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
<property name="marshallerProperties">
<map>
<entry key="jaxb.formatted.output">
<value type="boolean">true</value>
</entry>
<entry key="jaxb.encoding" value="UTF-8" />
</map>
</property>
<property name="packagesToScan">
<list>
<value>com.api.domain</value>
<value>com.api.web.controller.vo</value>
</list>
</property>
</bean>
<bean id="jstlViewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="order" value="2" />
<property name="viewClass"
value="org.springframework.web.servlet.view.JstlView" />
<property name="prefix" value="/views/" />
<property name="suffix" value="" />
<property name="requestContextAttribute" value="rc" />
</bean>
<!-- c:qualityValue="0.5" 可以设置内容类型的优先级,默认是1.0，越大优先级越高 -->
<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="jsonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" />
<bean id="marshallingHttpMessageConverter"
class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
<constructor-arg ref="jaxb2Marshaller" />
<!-- <property name="supportedMediaTypes" value="application/xml"></property> -->
<property name="supportedMediaTypes">
<util:list>
<bean class="org.springframework.http.MediaType" c:type="application" c:subtype="xml" c:qualityValue="0.5"/>
</util:list>
</property>
</bean>
SpringMVC返回json配置步骤如下：
1、添加jackson.jar包
2、在applicationContext.xml配制文件中添加如下代码
<!--解析返回JSON --> <!-- <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> --> <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> <property name="messageConverters"> <list > <ref bean="mappingJacksonHttpMessageConverter" /> </list> </property> </bean> <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> </list> </property> </bean>
3、在controller中添加如下代码
@RequestMapping(value="/chinese/listTree", method = RequestMethod.POST)
@ResponseBody
public List getlistChinese(Model model){
List<User> list = (List<ChineseCategory>) commonMgr.find("from User");
return list;
}
返回值可以为list也可以为Map类型
总结
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