Spring常用配置及解析类说明

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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