SpringMVC 使用ContentNegotiatingViewResolver整合多种视图解析器

之前的文章里，定义了多种视图解析器，可以使用ContentNegotiatingViewResolver进行视图整合。

配置文件：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context"xmlns:util="http://www.springframework.org/schema/util"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsdhttp://www.springframework.org/schema/utilhttp://www.springframework.org/schema/util/spring-util-4.0.xsd"><!-- 扫描的包 --><context:component-scan base-package="com.smart.web"/><!-- HandlerMapping和HandlerAdapter及数据转换器配置 -->    <mvc:annotation-driven conversion-service="conversionService">    <mvc:message-converters register-defaults="true">    <bean class="org.springframework.http.converter.BufferedImageHttpMessageConverter"/>       <bean class="org.springframework.http.converter.ByteArrayHttpMessageConverter"/>            <bean class="org.springframework.http.converter.StringHttpMessageConverter" />            <bean class="org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter"/>            <bean class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter"                p:marshaller-ref="xmlMarshaller" p:unmarshaller-ref="xmlMarshaller">            </bean>            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"/>    </mvc:message-converters>    </mvc:annotation-driven>    <!-- 数据转换器 --><bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean"><property name="converters"><list><bean class="com.smart.domain.StringToUserConvert" /></list></property></bean>       <!-- xml消息转换器 -->             <bean id="xmlMarshaller" class="org.springframework.oxm.xstream.XStreamMarshaller">        <property name="streamDriver">            <bean class="com.thoughtworks.xstream.io.xml.StaxDriver"/>        </property>        <property name="annotatedClasses">            <list>                <value>com.smart.domain.User</value>            </list>        </property>    </bean>                  <!-- 在使用Excel/PDF/XML的视图时，请先把这个视图解析器注释掉，否则产生视图解析问题-->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"          p:order="100" p:viewClass="org.springframework.web.servlet.view.JstlView"          p:prefix="/WEB-INF/views/" p:suffix=".jsp"/><!-- FreeMarker基础设施及视图解析器配置 --><bean class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer" p:templateLoaderPath="/WEB-INF/ftl"  p:defaultEncoding="UTF-8"> <property name="freemarkerSettings">            <props>                <prop key="classic_compatible">true</prop>            </props>        </property></bean>  <bean  class="org.springframework.web.servlet.view.freemarker.FreeMarkerViewResolver"            p:order="5" p:suffix=".ftl1" p:contentType="text/html; charset=utf-8"/>             <!-- Excel及PDF视图解析器配置 -->    <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"          p:order="10"/>    <bean id="userListExcel" class="com.smart.web.UserListExcelView"/>      <bean id="userListPdf" class="com.smart.web.UserListPdfView"/>              <!-- XMl及JSON视图解析器配置 -->    <bean id="userListXml"          class="org.springframework.web.servlet.view.xml.MarshallingView"          p:modelKey="userList" p:marshaller-ref="xmlMarshaller"/>    <bean id="userListJson"          class="org.springframework.web.servlet.view.json.MappingJackson2JsonView"          p:modelKeys="userList"/>                     <!-- 协商多种视图解析器 -->    <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver" p:order="0">        <property name="contentNegotiationManager" ref="contentNegotiationManager"/>        <property name="defaultViews">            <list>                <bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView"                      p:modelKeys="userList"/>                <bean class="org.springframework.web.servlet.view.xml.MarshallingView"                      p:modelKey="userList" p:marshaller-ref="xmlMarshaller"/>            </list>        </property>    </bean>    <bean id="contentNegotiationManager"          class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean"          p:ignoreAcceptHeader="true"          p:favorPathExtension="false"             p:favorParameter="true"                 p:parameterName="format"          p:defaultContentType="text/html">        <property name="mediaTypes">            <value>                html=text/html                xml=application/xml                json=application/json            </value>        </property>    </bean></beans>

在协商多种视图解析器配置里，定义了 json xml和html的视图。默认是html视图。

p:favorPathExtension 为false,如果设置为true,可以a.html  a.xml  a.json格式访问,返回对应视图。

p:favorParameter 为true,可以使用参数访问，p:parameterName="format" 定义参数名称为format,如 a?format=json,则可以返回json视图。

p:defaultContentType="text/html" 默认视图，是html，如果在ContentNegotiatingViewResolver外有其他视图解析器，这个配置可能会使其他视图不生效，如上面配置的XMl及JSON视图解析器，此时应去掉 p:defaultContentType="text/html"这行配置。如果没有去掉，只支持html xml json三种视图，其他视图（除了JstlView）会报错。

接口：

package com.smart.web;import java.io.UnsupportedEncodingException;import java.util.ArrayList;import java.util.Date;import java.util.List;import org.springframework.http.HttpEntity;import org.springframework.http.HttpStatus;import org.springframework.http.ResponseEntity;import org.springframework.stereotype.Controller;import org.springframework.ui.ModelMap;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;import com.smart.domain.User;@Controller@RequestMapping("/sp5")public class Sp5Controller {@RequestMapping(value="m1",method=RequestMethod.GET)@ResponseBodypublic String m1(){return "inm1";}@RequestMapping(value = "/m2",method=RequestMethod.POST)public ResponseEntity<User> m2(HttpEntity<User> requestEntity) throws UnsupportedEncodingException {User user = requestEntity.getBody();System.out.println("######:"+user+"---"+user.getRealName());user.setUserId("1000");return new ResponseEntity<User>(user, HttpStatus.OK);}@RequestMapping(value="/m3",method=RequestMethod.GET)public String m3(ModelMap mm){List<User> list = new ArrayList<User>();User user = new User();user.setUserId("1");user.setUserName("zhangsan");list.add(user);User user1 = new User();user1.setUserId("2");user1.setUserName("lisi");list.add(user1);mm.addAttribute("list", list);return "suc";}@RequestMapping(value="/m4" ,method=RequestMethod.GET)public String m4(ModelMap mm){List<User> list = new ArrayList<User>();User user = new User();user.setUserId("1");user.setUserName("zhangsan");list.add(user);User user1 = new User();user1.setUserId("2");user1.setUserName("lisi");list.add(user1);mm.addAttribute("userList", list);return "userFtl";}@RequestMapping(value="/m5" ,method=RequestMethod.GET)public String m5(ModelMap mm){List<User> list = new ArrayList<User>();User user = new User();user.setUserId("1");user.setUserName("zhangsan");user.setRealName("张三");user.setBirthday(new Date());list.add(user);User user1 = new User();user1.setUserId("2");user1.setUserName("lisi");user1.setRealName("张三");user1.setBirthday(new Date());list.add(user1);mm.addAttribute("userList", list);return "userListExcel";}@RequestMapping(value="/m6" ,method=RequestMethod.GET)public String m6(ModelMap mm){List<User> list = new ArrayList<User>();User user = new User();user.setUserId("1");user.setUserName("zhangsan");user.setRealName("张三");user.setBirthday(new Date());list.add(user);User user1 = new User();user1.setUserId("2");user1.setUserName("lisi");user1.setRealName("张三");user1.setBirthday(new Date());list.add(user1);mm.addAttribute("userList", list);return "userListPdf";}@RequestMapping(value="/m7" ,method=RequestMethod.GET)public String m7(ModelMap mm){List<User> list = new ArrayList<User>();User user = new User();user.setUserId("1");user.setUserName("zhangsan");user.setRealName("张三");user.setBirthday(new Date());list.add(user);User user1 = new User();user1.setUserId("2");user1.setUserName("lisi");user1.setRealName("张三");user1.setBirthday(new Date());list.add(user1);mm.addAttribute("userList", list);return "userListXml";}@RequestMapping(value="/m8" ,method=RequestMethod.GET)public String m8(ModelMap mm){List<User> list = new ArrayList<User>();User user = new User();user.setUserId("1");user.setUserName("zhangsan");user.setRealName("张三");user.setBirthday(new Date());list.add(user);User user1 = new User();user1.setUserId("2");user1.setUserName("lisi");user1.setRealName("张三");user1.setBirthday(new Date());list.add(user1);mm.addAttribute("userList", list);return "userListJson";}@RequestMapping(value="/m9" ,method=RequestMethod.GET)public String m9(ModelMap mm){List<User> list = new ArrayList<User>();User user = new User();user.setUserId("1");user.setUserName("zhangsan");user.setRealName("张三");user.setBirthday(new Date());list.add(user);User user1 = new User();user1.setUserId("2");user1.setUserName("lisi");user1.setRealName("张三");user1.setBirthday(new Date());list.add(user1);mm.addAttribute("userList", list);return "userListMax";}}

m9?format=json   返回json视图

m9?format=xml    返回xml视图

m9 返回jstl视图，也就是 如下bean视图

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
          p:order="100" p:viewClass="org.springframework.web.servlet.view.JstlView"
          p:prefix="/WEB-INF/views/" p:suffix=".jsp"/>

WEB-INF/views/userListMax.jsp

上面只是整合了 xml和json视图，此时访问m6 会报错，因为定义了p:defaultContentType="text/html"     不匹配xml和json，自动用JstlView视图解析，UserListPdfView视图没有被使用，此时去掉p:defaultContentType="text/html"  即可。