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Spring常用配置及解析类说明

2024-07-13 10:13:40
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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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